Matem Erdoğan

Balikesir University · Department of Physics

In this study, electrospun polyacrylonitrile (PAN)/polypyrrole (PPy) nanofibers (NFs) coated quartz crystal microbalance (QCM) were investigated for their sensing characteristics against six different volatile organic compounds (VOCs): chloroform, dichloromethane, carbon tetrachloride, benzene, toluene and xylene. SEM, TEM, FT-IR and TGA analysis w...

Phthalocyanines (Pcs), among synthetic macrocyclic structures, have recently been preferred sensing materials for harmful vapor detection owing to their attractive properties, such as chemical stability and highly thermal, and good production as nano-thin film layers and their π-electron conjugated system. Herein, phthalocyanine–zinc(II)-based (ZnP...

Immobilization of metal–organic framework (MOF) particles onto a gold substrate using spin coating is a difficult task due to the lack of cohesion forces between the crystals and the substrate. Therefore, it was decided to use polymethyl (methacrylate) (PMMA) as a matrix for MOF material. Spin coating was employed for the fabrication of PMMA films...

Calix[4]arene-based materials have been investigated to develop selective, sensitive, and low cost chemical sensors due to their simple, low cost synthesis, and wide range of chemical and physical properties. In this study, bisbenzothiazole-p-tert-butylcalix[4]arene-thiourea (BBTC[4]T) molecules were employed to produce thin films via Langmuir–Blod...

In this study, polyacrilonitrile (PAN) nanofibers obtained by electrospinning were directly coated on the surface of a quartz crystal microbalance (QCM) and were investigated for their sensing characteristics against chloroform, dichloromethane and carbon tetrachloride as volatile organic compounds (VOCs). PAN nanofibers were characterized by SEM,...

Zinc(II) phthalocyanine (Zn(II)Pc) molecule was the first time prepared onto three different substrates utilizing Langmuir-Blodgett (LB) deposition technique to investigate its vapor sensing abilities and some optical properties. We utilized five different and well-known techniques to control monolayer quality of Zn(II)Pc LB film. The obtained the...

In this paper, an organic macrocycle based on pillar[5]arene molecule including pyridine units (pyr-P5) was synthesized and its sensing ability was evaluated by integrating its spun thin films into Quartz Crystal Microbalance (QCM) and Surface Plasmon Resonance (SPR) sensing systems. The pyr-P5 mass sensitive-sensor's sensitivity and limit of detec...

The issue of utilizing organic materials in chemical sensing devices has recently received considerable critical attention. Phthalocyanines (Pcs) and metal phthalocyanines (MPcs) have been identified as promising materials thanks to their outstanding properties reported in this study. A novel zinc(II) phthalocyanine containing four 15-membered diox...

Pillar[n]arene is one of the most favorited supramolecular materials that possess a special chiral structure. The major property of pillar-structured materials is their high cavity, and this structure is able to dominate the higher cavity values due to the big number of n (5,6,7) as hydroquinone units. Thanks to this significant property, pillar[n]...

A newly synthesized calix[4]arene thiourea derivative decorated with 2‐(2‐aminophenyl)benzothiazole unit is selected to take part important role in host‐guest interactions of the macrocyclic molecules. p‐tert‐butylcalix[4]arene dithiourea (C[4]‐DT) Langmuir‐Blodgett (LB) thin films are prepared and characterized to develop a new sensing element for...

Zinc(II) phthalocyanine ( Zn(II)Pc) molecule was the first time prepared onto three different substrates utilizing Langmuir-Blodgett (LB) deposition technique to investigate its vapor sensing abilities and some optical properties. We utilized five different and well-known techniques to control monolayer quality of Zn(II)Pc LB film. The obtained the...

In the present work, a new macrocycle materials (SB77) was selected and Langmuir-Blodgett thin films of this macrocycle compounds were examined for its vapor sensing capabilities against vapor of aromatic BTX hydrocarbons (benzene, toluene, xylene) through Quartz Crystal Microbalance (QCM) technique. In accordance with this aim, the calix[4]arene L...

Bu çalışmada, grafen kaplı Langmuir-Blodgett (LB) ince filmlerin şişme davranışları Kuartz Kristal Mikrobalans (KKM) tekniği kullanılarak incelenmiştir. Bu filmler, bazı organik buharların (aseton, etanol ve metanol) difüzyon katsayı değerlerinin hesaplanması (Fick’in erken-zaman difüzyon kanunu kullanılarak) için oda sıcaklığında etkileşmeye bırak...

Picoline amide-based calix[4]arene molecule was the first time deposited onto gold substrate as an active layer by using Langmuir-Blodgett (LB) coating technique. UV-visible, atomic force microscopy, and surface plasmon resonance (SPR) technique were used to control monolayer quality. The sensing properties were investigated by exposing the LB thin...

The detection of organic vapors by chemically based sensors was achieved with macromolecules having convenient molecular cavities. Addressed herein, a calix[4]arene derivative 25,27-(4-chloro-2-phenylamino-1,3,5-triazine)-26,28-dihydroxycalix[4]arene (C4AsTr) was synthesized and Langmuir–Blodgett (LB) thin films of this compound modified with heter...

This study presented that deca pyridin-2-amine bearing Pillar[5]arene (P5-PA) was designed in an appropriate cavity, which acts a part significant role in host–guest interactions of the macrocyclic molecules. P5-PA monolayer was deposited onto suitable substrates as an active layer by using Langmuir-Blodgett (LB) coating technique to examine its va...

In the present work, the characterization and gas sensing properties of newly synthesized N ‐(4‐methylpyrimidine‐2‐yl)methacrylamide (N‐MPMA ) monomer Langmuir–Blodgett (LB) thin films were investigated. The UV–visible spectroscopy, quartz crystal microbalance (QCM), and atomic force microscopy were utilized to characterize N‐MPMA LB thin films. Th...

This study aimed at improving the sensing properties of polymer-based gas sensors by controlling the surface adsorption. For this purpose, a polymer was produced as a Langmuir–Blodgett (LB) thin film chemical gas sensor element. The polymer material used was characterized by FTIR, ¹H and ¹³C NMR analyses. All LB thin film layers were characterized...

Langmuir-Blodgett (LB) thin films using a N,N'-(L-alanine tert-butylester)-3,4:9,10-perylene diimide derivative were prepared to determine the optimum thin film forming conditions and their sensing properties towards volatile organic vapors. Our results showed highly uniform LB films could be transferred onto gold substrates and were highly sensiti...

This study presented that a novel pillar[5]arene-appended salicylaldehyde (P5-S) was structured in a suitable cavity, which plays an important role in macrocyclic host–guest interactions. P5-S thin films were fabricated and characterized via Langmuir–Blodgett (LB), UV–vis spectrophotometer and quartz crystal microbalance (QCM) techniques, respectiv...

This paper reported that a novel pillar[5]arene derivative (P5-AP) concluding ten 2-Amino-3-hydroxypyridine fragments was structured for preparing a macrocycle with an appropriate cavity for sensing harmful organic vapors. Thin films of P5-AP were fabricated using a modified Langmuir–Blodgett (LB) method and the formation of these thin films was ve...

Graphene oxide (GO) Langmuir–Blodgett (LB) thin films were prepared to use as chemical sensor element. The properties of GO LB thin film layers were characterized via Quartz crystal microbalance (QCM) method. Selectivity of the sensor to various organic vapors was investigated by surface plasmon resonance (SPR) and QCM techniques. Fick’s equations...

Determination of organic vapor sensing properties of α-Naphthylmethacrylate (α-NMA) monomer based Langmuir-Blodgett (LB) thin films was aimed in this study. LB thin film fabrication was performed on quartz glass and quartz crystal substrates in order to investigate the characterization and organic vapor properties of α-NMA materials by using UV-Vis...

A novel triazine-calix[4]arene conjugate was designed and synthesized with the aim to study gas sensing against volatile organic compounds (VOCs) such as dichloromethane, chloroform and carbon tetrachloride. This novel compound was fully characterized by spectroscopic techniques such as FTIR, 1H and 13C NMR along with HRMS and BET analysis. The tri...

Here, a pillar[5]arene derivative including biphenylcarboxylic acid groups was designed for obtaining a macrocycle with an ideal cavity for volatile organic compounds. The pillar[5]arene -biphenylcarboxylic acid (P5-BPCA) based Langmuir-Blodgett (LB) thin films were produced onto 50 nm thick gold-coated glass and 3.5 MHz quartz crystal substrates t...

Calix[4]arenes bearing phosphate and crown ether groups are shown to hold considerable promise as the active layer in volatile organic compound (VOC) vapor sensor. Its chemical sensing selectivity and sensitivity can be altered by different alkyl side chains. These organic architectures were successfully deposited by the spin coating method on gold...

In this work, N-cyclohexylmethacrylamide (NCMA) Langmuir-Blodgett (LB) thin films are characterized by Surface Plasmon Resonance (SPR) and Quartz Crystal Microbalance (QCM). The fitted SPR data is utilized to be calculating the film thickness of this material and is found to be as 0.76±0.08 nm for single layer. The sensing behaviors of LB films are...

The optical characterization and chemical vapor sensing properties of 1,7-dibromo-N,N′-(bicyclohexyl)-3,4:9,10-perylene diimide thin film against to organic vapors were discussed in this study by using spin coating, UV–Vis spectroscopy, atomic force microscopy, surface plasmon resonance (SPR) and Quartz Crystal Microbalance (QCM) techniques. The pe...

25,27-(Dipropylmorpholinoacetamido)-26,28-dihydroxycalix[4]arene was used as a chemical sensor material in this work. The calix[4]arene LB thin films were prepared onto a gold-coated glass and quartz glass substrates to fabricate a thin film chemical sensor element. Atomic Force Microscopy (AFM) and Surface Plasmon Resonance (SPR) techniques were u...

Amphiphilic block copolymers containing poly [N,N-(dimethylamino)ethyl methacrylate] block was used as a chemical sensor material in this paper. The amphiphilic block copolymer Langmuir-Blodgett (LB) thin films were prepared onto a gold-coated glass, quartz crystal and quartz glass substrates to fabricate a thin film chemical sensor element. Atomic...

In this study, the corrosion behaviors of AISI 420 and AISI 5120 steels borided in Ekabor-II powder at a temperature of 950 °C for 5 h were investigated in a 4% M HCI acid solution. The properties of the boride layer were evaluated by optical microscopy, X-ray diffraction, the micro-Vickers hardness tester. X-ray diffraction analysis of the boride...

In this study, a novel pillar[5]arene-quinoline (P5-Q) as organic material is used to fabricate Langmuir-Blodgett (LB) thin films and organic vapor sensing properties were investigated. LB deposition process is characterized by UV-visible spectroscopy, atomic force microscopy (AFM), scanning electron microscopy (SEM) and quartz crystal microbalance...

In this work, the Langmuir–Blodgett (LB) technique was applied onto the different substrates such as quartz, quartz crystals and gold coated glass for fabricating LB thin films with 25,27-(Dipropylmorpholinoacetamido)-26,28-dihydroxycalix[4]arene. The characteristics of the calix[4]arene LB films were evaluated by UV–Vis, atomic force microscopy (A...

In this study, FTIR, Raman, 1H-and 13C NMR spectral studies, thermogravimetric analyses (TGA), UV–vis spectroscopy, atomic force microscopy (AFM), surface plasmon resonance (SPR) and quartz crystal microbalance (QCM) measurements are used for copolymer characterization. A novel poly[(Styrene (ST)-co-Glycidyl Methacrylate (GMA)] is used to fabricate...

The optical characterization and gas sensing properties of Fe3O4 functionalized graphene oxide composite (Fe3O4-APTES-GO) thin film are discussed in this study by using spin coating, UV-visible spectroscopy, Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), energy dispersive X-ray Spectroscopy (EDX), X-ray diffraction (XRD...

The Langmuir–Blodgett (LB) technique was employed to produce thin LB films using N,N’-(glycine tert-butylester)-3,4,9,10-perylenediimide (FY1) material on gold coated glass. The characteristics of the perylenediimide FY1 LB films are assessed by surface plasmon resonance (SPR) measurements. The experimental SPR data are fitted using the Winspall so...

In this study, a novel poly[Styrene (ST)-co-Glycidyl Methacrylate (GMA)] copolymer material is used to fabricate Langmuir-Blodgett (LB) thin films and investigate organic vapor sensing properties. Quartz Crystal Microbalance (QCM) system is used to investigate gas sensing performance of copolymer LB films during exposure to Volatile Organic Compoun...

This study reports the synthesis, characterization, and gas sensing applications of the PDPA-b-PDMA-b-PDPA triblock copolymer material using NMR, UV-visible spectroscopy, atomic force microscopy (AFM), quartz crystal microbalance (QCM), and Langmuir-Blodgett (LB) thin film deposition techniques. The thin film deposition conditions of the copolymer...

2-(4-chloro-1-naphtyloxy)-2-oxoethyl methacrylate (ClNOEMA) was synthesized by reacting 4-Chloro-1-naphthyloxychloromethylketone with sodiummethacrylate in acetonitrile solvent at 70 °C. The free-radical initiated copolymerization of (ClNOEMA), with 2-(diethylamino)ethyl methacrylate (DEAEMA) was carried out in 1,4-dioxane solution at 70±1 °C using...

Langmuir-Blodgett thin film fabrication and gas sensing properties of a novel N, N′-dicyclohexyl-3,4:9,10-perylene bis(dicarboximide) material are reported. Surface plasmon resonance was employed to study the deposition process. The fitted data were used to evaluate the refractive index and the thickness of the material. The thickness of a single l...

In this work FT-IR, 1H and 13C-NMR spectra are used to analyze the structure of a novel 2-(4-methoxyphenylamino)-2-oxoethyl methacrylate (MPAEMA) materials. MPAEMA LB thin films are characterized by UV-Vis spectroscopy and Quartz Crystal Microbalance (QCM) techniques. The sensing behaviors of the films were investigated with respect to volatile org...

This study reports the synthesis, characterization and gas sensing applications of N-cyclohexylmethacrylamide (NCMA) monomer material using FT-IR, H-1 and C-13 NMR, UV-visible spectroscopy, Quartz Crystal Microbalance (QCM) and Langmuir-Blodgett (LB) thin film deposition techniques. The thin film deposition conditions of NCMA monomer material, whic...

LB thin film characterization and vapor sensing applications of 1,7‐dibromo‐ N,N’‐(bicyclohexyl)‐3,4:9,10‐ perylendiimide (FY3) materials are reported in this study. The thin film deposition conditions of FY3 materials, which are prepared by LB film technique, are characterized by UV‐vis spectroscopy and Quartz Crystal Microbalance (QCM) techni...

The synthesis, characterization and vapor sensing applications of a novel 2-(4-methoxyphenylamino)- 2-oxoethyl methacrylate (MPAEMA) materials are reported in this study. FT-IR, 1H and 13C NMR spectra are used to analayze the structure of novel MPAEMA monomers. The thin film deposition conditions of MPAEMA monomer materials, which are prepared by L...

1,7-Dibromo-N,N′-(bicyclohexyl)-3,4:9,10-perylendiimide material (FY3) was used as a sensor element in this work. Different number of LB thin film layer was deposited onto a gold-coated glass substrate to produce a thin film sensor element. Fabrication processes were monitored by surface plasmon resonance (SPR) technique. The experimental SPR data...

Two different thin film fabrication techniques, namely Langmuir-Blodgett (LB) and Spin Coating (SC), have been used to fabricate homogeneous nanoscale thin films of metal free 2, 3, 7, 8, 12, 13, 17, 18-Octaethyl-21H, 23H-porphine and its derivatives containing iron chloride, cobalt and magnesium. The gas sensing properties of these thin films towa...

In this work thin films of pyrene-labelled polystyrene (PS) prepared Langmuir–Blodgett (LB) film technique are characterized by UV–visible spectroscopy, Atomic Force Microscopy (AFM) and Surface Plasmon Resonance (SPR). The sensing behaviors of the films were investigated with respect to volatile organic compounds (VOCs) at room temperature. The se...

Electrical characterisations of Mesitylene-2-boronic acid (MBA), Phenylboronic acid (PBA) and 1-Naphthylboronic acid (NBA) are investigated using C-f and I–V measurements. All materials are used to fabricate Langmuir–Blodgett (LB) thin film by vertical dipping method. Metal/LB film/Metal sandwich structure is prepared to investigate electrical prop...

Three materials, Mesitylene-2-boronic acid (MBA), phenylboronic acid (PBA) and 1-naphthylboronic acid (NBA), were selected for fabrication of Langmuir-Blodgett (LB) thin films in order to investigate the sensing properties of these materials against volatile organic vapors. UV-visible and quartz crystal microbalance (QCM) techniques were employed f...

In this work we investigate the adsorption characteristics due to exposure to benzene, toluene and chloroform vapor of 2,3,7,8,12,13,17,18-Octaethyl-21H,23H-porphine metal free thin films fabricated by using the Langmuir–Blodgett (LB) thin film technique and its derivatives containing iron chloride, cobalt and magnesium. By using the surface pressu...

A reliable procedure for measuring parameters connected to surface roughness is needed to compare the gas sensing properties of various thin films or the effect of different fabrication procedures on the surface roughness and the sensing properties. In this article, we propose to investigate how the acquisition parameters specific to atomic force m...

The Quartz Crystal Microbalance (QCM) system is utilized to investigate the relationship between mass uptake and associated swelling for Langmuir-Blodgett (LB) organic thin films obtained from pyrene end-capped polystyrene (PS). The study was carried out using three different molecular weights of polymeric chains. The changes in resonance frequency...

A novel N,N′-(glycine tert-butylester)-3,4,9,10-perylenediimide was chosen for the study of Langmuir–Blodgett (LB) thin film characterization and the sensing properties against selected volatile organic vapors. Different number of LB film layer was deposited onto a glass and quartz crystal substrate. The thin film fabrication process was monitored...

In this work, 2,3,7,8,12,13,17,18-Octaethyl-21H,23H-porphine (OEP) in its free base form and metalated with iron (III) chloride (FeOEP), magnesium(II) (MgOEP) and cobalt(II) (CoOEP) have been used to fabricate Langmuir–Blodgett (LB) thin films. Using the surface pressure–surface area (Π–A) isotherm graphs optimum conditions for thin film deposition...

Disk-shaped heterogels were prepared by combining methyl methacrylate (MMA) and styrene (S) with ethylene glycol dimethacrylate (EGDM) as a crosslinker agent in the presence of 2,2′-azobisisobutyronitrile (AIBN). Swelling experiments were performed under chloroform vapor and the swollen gels are then allowed to dry under room temperature. Gravimetr...

Calixarene molecules can be deposited using the Langmuir–Blodgett (LB) film technique as an active layer which can be utilised in the field of volatile organic vapour sensing applications. The sensing responses of the films against benzene, ethyl benzene, toluene and m-xylene were measured by the surface plasmon resonance (SPR) method. Fast and rev...

In the present article thin films of poly (methyl methacrylate) (PMMA) polymer labelled with anthracene (Ant-PMMA) prepared by spin coating are characterised by UV–visible spectroscopy, surface plasmon resonance (SPR), spectroscopic ellipsometry (SE) and Atomic Force Microscopy (AFM) and their organic vapour sensing properties are investigated. Ant...

Side-chain pyrene functional poly(vinyl alcohol) (PVA) was synthesized by using ''click chemistry'' strategy. First, partial tosylation of PVA with p-toluene sulfonyl chloride were performed. The resulting PVA-Ts polymer was then quantita-tively converted into poly(vinyl alcohol)-azide (PVA-N 3) in the presence of NaN 3 /DMF at 60 C. Propargyl pyre...

In-situ steady-state fluorescence experiments were performed for studying slow release of pyrene-labeled polystyrene chains from polystyrene gels formed by free-radical crosslinking copolymerization. Atom transfer radical polymerization was used to produce the pyrene end-capped polystyrene chains. In order to load the pyrene end-capped polystyrene...

Sorption process by surface plasmon resonance (SPR) was studied by exposing polymeric film made from anthracene labeled poly(methyl methacrylate) (An-PMMA) chains to various concentrations of saturated chloroform vapor. It was observed that the reflectivity changes were fast and reversible. The changes in reflectivity implied the swelling behavior...

Strobe Master System (SMS), is introduced for studying THE swelling of disc shaped gels in chloroform–heptane mixtures. Gels were prepared by free radical copolymerization of methyl (methacrylate) (MMA) and ethylene glycol dimethacrylate (EGDM). Pyrene (P) was introduced as a fluorescence probe during polymerization and the existence of P were meas...

Reordering of disc-shaped polystyrene (PS) gels due to multiple swelling, under organic vapor was studied by using Fast Transient Fluorescence (FTRF) technique. Disc-shaped polystyrene gels were prepared by free radical copolymerization (FRC) of styrene (S) with ethylene glycol dimethacrylate (EGDM) as a crosslinker. Pyrene (P) was introduced as a...

Glass transition during bulk polymerization was studied in free-radical cross-linking copolymerization (FCC) of methyl methacrylate (MMA) using the steady-state fluorescence (SSF) technique. Naphthalene (N) was used as a monomer and excimer forming probe. Changes in the viscosity of the pregel solutions due to gel formation dramatically enhance bot...

A Fast Transient Fluorescence Technique (FTRF) was employed for studying swelling of disc shaped poly (methyl methacrylate) (PMMA) gels, which were prepared by free radical copolymerization of methyl (methacrylate) (MMA) using various ethylene glycol dimethacrylate (EGDM) contents at 60 ∘C. Pyrene (P) was introduced as a fluorescence probe during p...

The time-resolved, fast transient fluorescence (TRF) technique which uses a strobe master system (SMS), was employed for studying swelling and drying of disc-shaped polystyrene gels. Disc-shaped gels were prepared by free-radical crosslinking copolymerization of styrene and ethylene glycol dimethacrylate. Pyrene was introduced as a fluorescence pro...

The mobility of pyrene end‐capped polystyrene (Py‐PSt) trapped in swollen polystyrene gels (PSt) was investigated. PSt gels were prepared by free radical crosslinking copolymerization (FCC) of styrene (St) and ethylene glycol dimethacrylate (EGDM). The pyrene end‐capped polystyrene was produced by atom transfer radical polymerization (ATRP). After...

Cover: The cover shows the mobility of pyrene end‐capped polystyrene (Py‐PSt) trapped in swollen polystyrene (PSt) gel. Py‐PSt chain was produced by atom transfer radical polymerization (ATRP). Swelling experiments were performed in real time by monitoring pyrene lifetimes, outside ( τ 1 ) and inside ( τ 2 ) of PSt gel, by using fast transient fluo...

In-situ steady-state fluorescence (SSF) measurements were performed for studying diffusion processes of pyrene end-capped polystyrene (Py-PSt) in gels formed by free radical cross-linking copolymerization (FCC) of styrene (St) and ethylene glycol dimethacrylate (EGDM) in toluene solutions. The pyrene end-capped polystyrene was prepared by atom tran...

A fast transient fluorescence (FTRF) technique was used to study the sol–gel transition during gelation of methyl methacrylate (MMA) and ethylene glycol dimethacrylate (EGDM). Pyrene (Py) was used as a fluorescence probe for the in situ polymerization experiments. Swelling of this cylindrical poly(methyl methacrylate) (PMMA) gel in chloroform was m...

The swelling of disc-shaped heterogels were studied using Fast Transient Fluorescence Technique (FTRF). Disc-shaped heterogels were prepared by combination of methyl-methacrylate (MMA) and styrene (S) with ethylene glycol dimethacrylate (EGDM) as a crosslinker agent in the presence of 2,2′-azobisisobutyronitrile (AIBN). Pyrene (Py) was introduced a...

Fast transient fluorescence technique (FTRF), which uses a Strobe Master System (SMS), is used to study swelling and drying of disc shape heterogels. Disc shape heterogels are prepared by free radical copolymerization (FCC) of methyl (methacrylate) (MMA) and styrene (S) with ethylene glycol dimethacrylate (EGDM). Pyrene (Py) is introduced as a fluo...

The fast transient fluorescence technique (FTRF), which uses the strobe master system (SMS), was employed to study the swelling of disc-shaped PMMA [poly(methyl methacrylate] gels. Seven gels were prepared by free radical copolymerization (FCC) of methyl methacrylate (MMA) with various ethylene glycol dimethacrylate (EGDM) contents. Pyrene (Py) was...

Fast transient fluorescence technique (FTRF) was employed for studying swelling of disc‐shaped poly(methyl methacrylate) (PMMA) gels, which were prepared by free radical copolymerization of methyl methacrylate (MMA) using various ethylene glycol dimethacrylate (EGDM) contents at 60 °C. Pyrene (P) was introduced as a fluorescence probe during polyme...

A novel in situ steady state fluorescence experiment was performed for studying slow release processes in gels formed by free radical cross-linking copolymerization of methyl methacrylate and ethylene glycol dimethacrylate. Gels were prepared at 75 °C with pyrene (Py) as a fluorescence probe. After drying these gels, slow release experiments were p...

Fast transient fluorescence technique (FTRF) which uses Strobe Master System (SMS) was used to study swelling of disk-shaped poly(methyl methacrylate) (PMMA) gels. Disk-shaped PMMA gels were prepared by free-radical copolymerization of methyl (methacrylate) (MMA) and ethylene glycol dimethacrylate (EGDM). Pyrene (P) was introduced as a fluorescence...

A novel technique based on in situ steady state fluorescence measurements is introduced for studying swelling processes of gels formed by free radical crosslinking copolymerization of methyl methacrylate (MMA) and ethylene glycol dimethacrylate (EGDM) in homopolymer solutions. Gels were prepared at 55±2 °C for various EGDM contents. After drying th...

Fast transient fluorescence (FTRF) technique was employed for studying the swelling of disk shaped poly(methyl methacrylate) (PMMA) gels which were prepared by free-radical copolymerization of methyl (methacrylate) (MMA) and ethylene glycol dimethacrylate at 80°C. The FTRF technique, which measures lifetimes, is more powerful in gel swelling experi...

The steady-state fluorescence (SSF) technique was used to study the polymerization rate in free-radical crosslinking copolymerization (FCC) of methyl methacrylate (MMA) and ethylene glycol dimethacrylate (EGDM). Pyrene (Py) was used as a fluorescent probe for the in situ polymerization experiments. The increase in Py intensity was monitored during...

The fast transient fluorescence technique was used to study the sol–gel phase transition in free-radical crosslinking copolymerization of methyl methacrylate (MMA) and ethylene glycol dimethacrylate. Pyrene (Py) was used as a fluorescence probe for the in situ polymerization experiments. Fluorescence lifetimes of Py from its decay traces were measu...

Gels were swollen in various solvents with different molar volume V and solubility parameter δ. In situ steady state fluorescence (SSF) measurements were performed for swelling experiments in gels formed by free radical crosslinking copolymerization (FCC) of methyl methacrylate (MMA) and ethylene glycol dimethacrylate (EGDM). Gels were prepared at...

A Strobe Master System (SMS) is introduced for studying the swelling of cylindrical densely (DG) and loosely (LG) formed gels. Gels were prepared by free radical copolymerization of methyl (methacrylate) (MMA) and ethylene glycol dimethacrylate (EGDM). Pyrene (P) was introduced as a fluorescence probe during polymerization, and the lifetimes of P w...

A fast transient fluorescence technique (FTRF) which uses the Strobe Master System (SMS), is introduced for studying swelling of a cylindrical poly(methyl methacrylate) (PMMA) gel. PMMA gel was prepared by free radical copolymerization of methyl (methacrylate) (MMA) and ethylene glycol dimethacrylate (EGDM). Pyrene (Py) was introduced as a fluoresc...

The time-resolved, fast transient fluorescence technique, which uses a strobe master system, was employed for studying the swelling of a disc-shaped poly(methyl methacrylate) gel. The disc-shaped gel was prepared by free-radical copolymerization of methyl methacrylate and ethylene glycol dimethacrylate. Pyrene (Py) was introduced as a fluorescence...