Ketan R Patel

Central Salt and Marine Chemicals Research Institute | CSMCRI · Membrane Science and Separation Technology Division

Molecularly woven materials with striking mechanical resilience, and 2D controlled topologies like textiles, fishing nets, and baskets are highly anticipated. Molecular weaving exclusively apprehended by the secondary interactions expanding to laterally grown 2D self‐assemblies with retained crystalline arrangement is stimulating. The interlacing e...

Inspired by the uranyl‐imidazole interactions via nitrogen's (N's) of histidine residues in single helical protein assemblies with open framework geometry that allows through migration/coordination of metal ions. Here, preliminary components of a stable hydrogen‐bonded organic framework (HOF) are designed to mimic the stable single helical open fra...

The highly anticipated artificial conversion of water to oxygen for the imperishable growth of renewable energy requires efficient water oxidation catalysts (WOCs) to drive the exciting 4e − transformation at low driving potentials. Herein, we describe the freestanding thin film of P 5 Q 7 (TFPQ), where Preyssler [P 5 W 30 O 110 ] 14− (P 5) cluster...

Hydrogen-bonded organic frameworks (HOFs) are assembled via non-covalent secondary interactions that are scintillating examples of porous crystalline materials. This protocol highlights the synthesis and characterization of U selective, permanently porous, hydrolytically stable single-component CSMCRIHOF-1. We describe the steps to synthesize hydro...

Polymeric membranes with precise molecular weight cutoffs are necessary for molecular separations. Here, we present a stepwise preparation of microporous polyaryl (PAR_TTSBI) freestanding nanofilm as well as the synthesis of bulk polymer (PAR_TTSBI) and fabrication of thin film composite (TFC) membrane, with crater-like surface morphology, then pro...

Here, we present a protocol for uranium extraction from seawater (UES) and its characterization and computational-based structure analysis. We describe formulating batch adsorption experiments for adsorptive separation of uranium using thin film (TFCH) of Hydrogen-bonded Organic Framework (CSMCRIHOF-1). We then detail the recovery of uranium using...

Uranium extraction from seawater (UES) efficiency is limited by the material design, such as U-selective binding sites, their uniform distribution, surface area exposure, diffusivity, and stability. Herein, we report a U-selective single-component hydrogen-bonded organic framework (CSMCRIHOF-1) of phenoxy-imine synthons conjugated to pyridyl tecton...

Polymeric thin film composite (TFC) membranes are well-known for their application in aqueous separation processes, these TFC membranes have the proven advantage of such demanding stability, tunable porosity and possibility of incorporating the selective binding sites for one of the challenging chemical separation of Uranium (U) from seawater. Here...

Polymeric membranes with enhance permeability and selectivity are highly anticipated approach for liquid separation. Polymeric membranes for controlled molecular weight cut-off and high liquid permeance are desirable to separate small organic molecules and multivalent ions from a water stream. This demands active polymeric layer to be defect-free,...

Polymeric membranes with high permeance and selectivity performances are anticipated approach for water treatment. Separation membranes with moderate molecular weight cut-offs (MW in between 400-700 g mol⁻¹) are desirable to separate multivalent ions and small molecules from a water stream. This requires polymeric membranes with controlled pore, po...

Shilpi Kushwaha received her PhD (2012) from the Maharaja Sayajirao University (MSU), Vadodara, and then worked as a Fulbright-Nehru Postdoctoral Research Fellow (PDF) at Arizona State University and as a Young Scientist (DST-YS) at the National Chemical Laboratory (CSIR-NCL), Pune. She is an assistant professor at the Academy of Scientific and Inn...

Introduction: Post-cholecystectomy syndrome (PCS) comprise of a group of abdominal symptoms that occur after cholecystectomy. Post cholecystectomy syndrome is defined as group of heterogeneous symptoms. It is consists of upper abdominal pain, vomiting and dyspepsia, which occur after cholecystectomy. Although, this term is not accurate, as it compr...

Ultrahigh molecular weight polyethylene (UHMWPE) belongs to an emerging class of high-performance specialty polymers with a unique set of properties and applications. The field has witnessed many scientific and technological advances in recent years. However, synthesis of UHMWPE is not a trivial exercise and presents several challenges. This review...

Insertion or coordination copolymerization of ethylene with di‐substituted olefins is challenging and the choice of di‐substituted mono‐functional olefin versus di‐substituted di‐functional olefin (DDO) appears to be decisive. Here we show that DDO‐inserted species are amenable to ethylene insertion and polymerization. DDOs such as 2‐acetamidoacryl...

A new hybrid chiral material, comprising Keggin type mono ruthenium substituted phosphotungstate (PW11Ru) and chiral (R-(-)-1-cyclohexylethylamine (Cy)), was synthesized in an aqueous medium by simple ligand substitution. The bonding was confirmed by FT-IR, multinuclear NMR (³¹P, ¹³C and ¹⁵N), while the chirality was confirmed by CD spectroscopy an...

Heterogeneous Ziegler-Natta and homogeneous metallocene catalysts are known to produce ultrahigh molecular weight polyethylene (UHMWPE) in the entangled state. On the other hand, only (two) homogeneous single-site catalysts are reported to yield disentangled UHMWPE (dis-UHMWPE). This disparity between the two types of catalysts and the two states o...

Self-assembly of two neutral ligands on a metal to mimic bidentate ligand coordination has been frequently encountered in the recent past, but self-assembly of an anionic ligand on a metal template alongside a neutral ligand remains an elusive target. Such a self-assembly is hampered by additional complexity, wherein a highly negatively charged ani...

Discovered by Hugo Schiff, condensation between amine and aldehyde represents one of the most ubiquitous reactions in chemistry. This classical reaction is widely used to manufacture pharmaceuticals and fine chemicals. However, the rapid and reversible formation of Schiff-base prohibits formation of alternative products, of which Benzoxazinones are...

Solid catalysts comprising manganese salen and hydrous zirconia were synthesized and characterized, and catalytic activity was evaluated by carrying out solvent-free liquid phase aerobic oxidation of styrene. As solid catalysts show high conversion of styrene with good selectivity toward benzaldehyde and styrene epoxide. The recovery of the catalys...

An attempt has been made to use tetranuclear sandwich type Mn(II) substituted POMs as catalyst for solvent free liquid phase oxidation of styrene under mild reaction conditions. The present catalytic system considered as an efficient and effective approach in achieving high conversion rate with high turnover numbers (TONs) with single selective pro...

The in-pocket Cs salt of di-manganese(II) substituted phosphotungstate was synthesized and characterized by various spectral techniques. The use of the synthesized complex for liquid phase oxidation of styrene using the environmentally benign oxidants O2 and H2O2 was explored. A kinetic study was also carried out in the case of H2O2. The activation...

A new chiral polyoxometalates based functionalized material comprising Keggin type mono manganese substituted phosphotungstate and enantiopure R-(−)-1-cyclohexylethylamine was synthesized in an aqueous media by simple ligand substitution method. The POM-based synthesized material was systematically characterized in solid as well as solution by vari...

A new inorganic–organic hybrid material comprising Keggin-type mono manganese-substituted phosphotungstate and salen was synthesised. The synthesised hybrid material was systematically characterised by various physicochemical techniques such as elemental analysis, thermal gravimetric analysis, FT-IR, UV–vis, electron spin resonane, H NMR, C MAS NMR...

A new inorganic–organic POM-based hybrid material comprising Keggin type mono manganese substituted phosphotungstate and enantiopure S-(+)-sec-butyl amine was synthesized in an aqueous media by simple ligand substitution method. The synthesized hybrid material was systematically characterized in solid as well as solution by various physicochemical...

Keggin-type mono Co(II)-substituted phosphotungstate was synthesized from 12-tungstopho-sphoric acid and cobalt chloride tetrahydrate. The obtained complex was systematically characterized in solution as well as solid by various physicochemical techniques. A single-crystal X-ray analysis shows that the complex crystallizes in tetragonal system, P4...

Keggin type Cobalt and Manganese substituted phosphotungstates were synthesized and characterized by various physicochemical techniques. They were efficiently used for liquid phase non-solvent oxidation of styrene under mild reaction conditions. It was found that the catalytic systems are efficient in achieving higher conversions with high turn ove...

The dimeric, tetranuclear manganese(II)‐substituted sandwich‐type phosphotungstate complex has been synthesized in high yield using a straightforward one‐pot synthesis by reacting commercially available H 3 [PW 12 O 40 ] with MnCl 2 . The complex has been characterized by single‐crystal X‐ray structure analysis. The complex is oxidatively and solvo...

The Keggin-type Cs salt of a mono Mn(II)-substituted phosphotungstate (Cs5[PMnW11O39]) was synthesized from H3PW12O40, MnCl2 and CsCl. The complex was characterized in solution as well as in the solid state by spectroscopic, magnetic and electrochemical techniques. The complex crystallized in tetragonal phase. X-ray structural analysis shows two ty...