Sue Boyd

Griffith University · School of Natural Sciences

Soil organic matter (SOM) formation involves microbial transformation of plant materials of various quality with physico-chemical stabilisation via soil aggregation. Land use and vegetation type can affect the litter chemistry and bioavailability of organic carbon (OC), and consequently influence the processing and stabilisation of OC into SOM. We...

The hydrogen storage behaviour of a PIM-1-polyaniline nanocomposite was studied for the first time at both ambient and cryogenic temperature. The porosity of the polymers was investigated using nitrogen sorption measurements. A high BET surface area of 875 m2g–1 was obtained for the synthesised PIM-1. Though the BET surface area decreased upon dopi...

Aims Litter inputs are closely related to both forest productivity and nutrient cycling under climate change and local management. This study investigated the effect of litter inputs on litter decomposition, changes in litter chemistry and nitrogen (N) dynamics during eucalyptus leaf litter decomposition. Methods Two parallel in situ litter decomp...

This project determined the stable isotopic compositions (δ²H/δ¹³C/δ¹⁵N) of 181 samples of high purity illicit methylamphetamine seized in Queensland between July 2015 and February 2017. The project was undertaken to augment existing stable isotopic composition data for methylamphetamine samples seized at Australian borders. Based on a rule-of-thum...

Mixed‐matrix membranes containing synthesised nano‐sized zeolite 4A and PVAc were fabricated to investigate the effect of zeolite loading on membrane morphology, polymer‐filler interaction, thermal stability and gas separation properties. SEM studies revealed that, although the membranes with 40 wt % nano‐sized zeolite particles were distributed un...

There has been recent interest in polymers of intrinsic microporosity (PIMs) for solid‐state hydrogen‐storage materials; however, the gas‐sorption properties and conditions for hydrogen uptake are relatively unexplored. PIM‐1 has been synthesised using the condensation reaction between 3,3,3,3‐tetramethyl‐1,1‐spirobisindane‐5,5,6,6‐tetraol and 2,3,...

An intrinsically microporous high surface area (772 m ² g ⁻¹ ) hexaazatrinaphthylene-based network polymer has been synthesized. Additionally, the material was postmodified via the introduction of palladium ions to determine the effect of metalation on the properties of the assembly. Both the unmodified as-synthesized and metal-modified polymers we...

The common methods of determining soil carbon (C), nitrogen (N) and their isotopic compositions (δ13C and δ15N) are expensive and time-consuming. Therefore, alternative low-cost and rapid methods are sought to address this issue. This study aimed to investigate the potential of hyperspectral image analysis to predict soil total carbon (TC), total n...

Determining the source of sediments and associated nutrients from terrestrial to aquatic environments is critical for managing the detrimental impacts of soil erosion and loss of nutrients from terrestrial into aquatic environment. However, tracing the source of particulate nutrients from different land uses has not been adequately carried out due...

Harvest residues contain large stores of carbon (C) and nitrogen (N) in forest plantations. Decomposing residues can release labile C and N into soil and thus provide substrates for soil bacterial communities. Previous studies showed that residue retention could increase soil C and N pools and activate bacterial communities in the short term (≤ 10...

Studying C functional group distributions in decomposing litterfall samples is one of the common methods of studying litterfall decomposition processes. However, the methods of studying the C functional group distributions , such as 13 C NMR spectroscopy, are expensive and time consuming and new rapid and inexpensive technologies should be sought....

The aim of this study was to systemically evaluate how feedstock characteristics and temperature influence biochar evolution during pyrolysis and to establish their relationships with biochar potential for soil amendments. We produced four biochar thermosequences from oak, pine, sugarcane and peanut shell at twelve temperatures (350–900 °C), and ch...

A 49 week soil incubation study employing 15 recycled organic (RO) wastes was conducted to investigate relations (through Kendall correlation analysis) between plant available nitrogen (PAN) supply and soil recalcitrant carbon (C) parameters with those of the RO waste chemical properties as determined by wet chemistry and spectroscopic methods. The...

We report carbon nanodots that can be utilized as effective color converting phosphors for the production of white LEDs. Blue-excitable and yellow-emitting carbon nanodots, functionalized with 3-(imidazolidin-2-on-1-yl)propylmethyldimethoxysilane (IPMDS)-derived moieties (IS-CDs), are synthesized by a novel one-pot reaction in which the products fr...

Char as a carbon-rich material, can be produced under pyrolytic conditions, wildfires or prescribed burn offs for fire management. The objective of this study was to elucidate mechanistic interactions of copper (Cu²⁺) and nickel (Ni²⁺) with different chars produced by pyrolysis (green waste, GW; blue-Mallee, BM) and forest fires (fresh-burnt by pre...

In this study, the amounts of phosphorus (P) in nine types of biochar (one natural woody biochar and eight manufactured plant derived biochars) extractable by deionized water, 0.5 N NaHCO3 (pH = 8.5) and 0.5 N H2SO4, respectively, and P adsorption on single biochar or soil/biochar mixtures were examined to investigate the potential effect and role...

The identification and structural elucidation of the novel synthetic cannabimimetic 8-quinolinyl 4-methyl-3-(1-piperidinylsulfonyl)benzoate (QMPSB) by GC-MS, LC-MS and NMR is reported. QMPSB was identified in Queensland, Australia on plant material packaged as herbal incense. The identification of QMPSB was initially hampered due to trans-esterific...

In 2012, seized capsules containing white powder were analyzed to show the presence of unknown steroid-related compounds. Subsequent gas chromatography–mass spectrometry (GC-MS) and nuclear magnetic resonance (NMR) investigations identified a mixture of 3α- and 3β- isomers of the novel compound; 3-chloro-17α-methyl-5α-androstan-17β-ol. Synthesis of...

Purpose Residue retention is important for nutrient and water economy in subtropical plantation forests. We examined decomposing hoop pine (Araucaria cunninghamii Ait. Ex D. Don) residues—foliage, branches, and stem wood—to determine the changes in structural chemistry that occur during decomposition. Materials and methods Residues were incubated...

Using solid state (13)C NMR data and elemental composition in a molecular mixing model, we estimated the molecular components of the organic matter in 16 recycled organic (RO) wastes representative of the major materials generated in the Sydney basin area. Close correspondence was found between the measured NMR signal intensities and those predicte...

The asymmetric unit of the title compound, C12H24N+·C9H8N3O2 −, consists of two dicyclo­hexyl­ammonium cations linked to two (S)-2-azido-3-phenyl­propano­ate anions by four short N—H⋯O hydrogen bonds with N⋯O distances in the range 2.712 (3)–2.765 (3) Å. The dicyclo­hexyl­ammonium cations and the aryl and carboxyl­ate groups of the anion are relate...

Australia has seen an increase in the importation and use of drugs that are marketed and sold as "Legal Highs". These compounds have largely tended to be various cathinone analogues, with 4-methylmethcathinone the most prominent to date. In January 2009, unknown samples were submitted for analysis along with a large seizure of 3-fluoromethcathinone...

The ruthenium(II) complex, [RuCl2(NO)L] (I), (L = [(2-py)2PC2H4PO2(2-py)]-) was obtained from recrystallization of RuCl3NO(d2pype) (d2pype = (2-py)2PC2H4P(2-py)2) in the presence of HNO3, crystallizing in the monoclinic space group P21 (no. 4), with a = 8.012(4) Å, b = 14.454(4) Å, c = 9.353(3) Å, β = 105.77(3)°, and Z = 2. Crystals of the DMSO sol...

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

The 1:1 proton-transfer compound of the potent substituted amphetamine hallucinogen (R)-2-amino-1-(8-bromobenzo[1,2-b;5,4-b']difuran-4-yl)propane (common trivial name 'bromodragonfly') with 3,5-dinitrosalicylic acid, namely 1-(8-bromobenzo[1,2-b;5,4-b']difuran-4-yl)propan-2-aminium 2-carboxy-4,6-dinitrophenolate, C(13)H(13)BrNO(2)(+).C(7)H(3)N(2)O(...

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Managing heavily manured soils for decreased P loss to waters requires improved understanding of the chemical and sorption–desorption characteristics of P in these soils. We used soils from agricultural fields receiving ≥8 yr of dairy, poultry, swine manure or spent mushroom compost for the determination of P functional groups in NaOH-EDTA extracts...

The crystal structure of the title compound, C(27)H(45)N(3), has been determined as part of our investigation into the hydro-phobic modification of amino-glycoside anti-biotics. The isopropyl group showed disorder for the tertiary carbon (equal occupancies), with high thermal motion for the peripheral atoms of the isopropyl and azide groups also ap...

The copper sulfide mineral flotation collector, N-n-butyl-N′- ethoxycarbonyl-thiourea (H2bectu), and the 1:1 hexameric copper(I) thioureate complex, [Cu(Hbectu)]6, have been characterized by single crystal X-ray diffraction. H2bectu crystallizes in the triclinic space group P1 with a = 5.2754(4), b = 9.0042(7), c = 12.6030(9)Aring;, α = 80.528(6),...

Soil carbon (C) pools are not only important to governing soil properties and nutrient cycling in forest ecosystems, but also play a critical role in global C cycling. Mulch and weed control treatments may alter soil C pools by changing organic matter inputs to the forest ecosystem. We studied the 12-month mulch and weed control responses on the ch...

Reaction of N-Boc neomycin with triphenylphosphine and diissopropyl azodicarboxylate in either toluene or THF results in an epoxide in ring IV, not an aziridine or azetidine as previously reported. Yes Yes

(Chemical Equation Presented) Understanding the factors that determine molecular shape enables scientists to begin to understand and tailor molecular properties and reactivity. Many biomolecules and bioactive compounds contain aliphatic heterocyclic rings whose conformations play a major role in their biological activity. The interplay of a number...

Plant litter and fine roots are important carbon (C) inputs to soil and a direct source of CO2 to the atmosphere. Solid-state carbon-13 nuclear magnetic resonance (13C-NMR) spectroscopy was used to investigate the nature of C changes during decomposition of plant litter and fine roots of mulga (Acacia aneura F. Muell. Ex. Benth.), wheat (Triticum a...

The aminoglycoside antibiotic neomycin B has been converted into several novel building blocks that can be used for the specific modification of three of the four ring systems. Under carefully controlled conditions, the Mitsunobu reaction can be used to selectively dehydrate the ido ring to give the talo epoxide. Subsequently however, under more fo...

A number of peripherally functionalised dendritic molecules were synthesised in almost quantitative yield by a synthetic method involving the reaction between amines and isocyanates. The peripheral functional groups were incorporated by preparing a number of branched subunits, based on tris(hydroxymethyl)aminomethane (TRIS), possessing three nitro,...

The design of a new class of chiral [2]catenanes is reported. The self-assembly of [2]catenanes comprising one or two 3,3′-bitolyl spacers in the π-electron-deficient component, and bis-p-phenylene-34-crown-10 (BPP 34 C 10) as the π-electron-rich component, is described. The X-ray crystal structures, together with solution-state dynamic 1H NMR spec...

Recation of hexa-N-boc neomycin B with triphenylphosphine (TPP), p-nitrobenzoic acid, and diisopropyl azodicarboxylate (DIAD) in toluene, which results in the formation of an epoxide in ring IV, was analyzed. Epoxide formation was favored by the trans-diaxial arrangement of the vicinal diol in the ido ring and this competes effectively with reactio...

In the structure of the title steroid, C23H34O3, the molecules are linked in infinite chains through intermolecular C11(n) O-H...O hydrogen bonds between the hydroxy proton and the ester carbonyl O atom. Yes Yes

Decomposition of stumps in successive rotation of Chinese fir (Cunninghamia lanceolata (Lamb.) Hook.) plantations was studied using a chronosequence approach. The results showed that decomposition rate constant of Chinese fir stump was 0.02695 as calculated from Olson's model. The N content of stump increased during the first two-year decomposition...

The tris(triphenylphosphine)copper(I) complexes [(PPh3)3CuX] for X = Cl (1), Br (2), I (3), ClO4 (4), BF4 (5), [(PPh3)3CuCl].CH3CN (1a), [Cu(PPh3)3(CH3CN)]X for X = ClO4 (6), BF4 (7), and [Cu(PPh3)3(CH3CN)]X.CH3CN for X = SiF5 (8), PF6 (9) have been studied by solid state 31P CP/MAS NMR spectroscopy together with single crystal X-ray diffraction fo...

In the title compound, [AuI(C28H28OP 2)]·H2O, the 1-(diphenylphosphino)-4-(diphenylphosphinoyl)butane (dppbO) ligand coordinates through the phosphorus donor to give a linear two-coordinate P-Au-I gold(I) complex. Pairs of [AuI(dppbO)] molecules are linked by symmetric tris-water hydrogen-bond interactions. These dimers associate in zigzag fashion...

The interaction of the sulfide mineral flotation collector, n-butylethoxycarbonylthiourea (BECTU), with copper surfaces at pH 9.2 has been investigated by voltammetry and Raman scattering spectroscopy, NMR, Raman and FTIR spectroscopies have been applied to characterise BECTU and its copper(I) compound to provide a basis for interpreting the spectr...

In the title compound, [AuI(C28H28OP2)]·H2O, the 1-(di­phenyl­phosphino)-4-(diphenyl­phosphinoyl)butane (dppbO) ligand coordinates through the phospho­rus donor to give a linear two-coordinate P—Au—I gold(I) complex. Pairs of [AuI(dppbO)] molecules are linked by symmetric tris-water hydrogen-bond interactions. These dimers associate in zigzag fashi...

Soil humic substances are important components of soil organic matter and contain a significant portion of total soil organic carbon (C) and nitrogen (N). Solidstate 13C nuclear magnetic resonance (NMR) with cross-polarisation and magic angle spinning (CPMAS) was applied to humic acids extracted from 0–10 cm soils collected from areas under windrow...

In the title compound, [AuBr(dppmO)]·CH3CN [dppmO = Ph2P(CH2)P(O)Ph2], the dppmO ligand coordinates through the P donor to give a linear two-coordinate P—Au—Br gold(I) complex. The Au—Br and Au—P bond lengths are 2.241 (2) and 2.4069 (19) Å, respectively. The P—Au—Br and P=O groups lie almost parallel to each other [O—P⋯P—Au = 8.3 (2)°], while the...

NMR and Raman spectroscopies have been applied to characterise the diisobutyldithiophosphinate (DIBDTPI) compounds of sodium, copper, silver and gold, diisobutyldithiophosphinic acid (DIBDTPIH), and the oxidation product bis(diisobutylthiophosphoryl)disulfide (DIBDTPI)2 in order to provide a basis for investigating the interaction of the flotation...

Three-coordinate 1 1 and 1 2 compounds of copper(I) halides with tricyclohexylphosphine have been synthesised and characterized by single crystal X-ray structure determinations, 63Cu NQR spectroscopy, solid state 31P CPMAS NMR spectroscopy, and low frequency vibrational spectroscopy. The 1 1 compounds crystallize as isomorphous, centrosymmetric [(P...

The ruthenium(II) complex, [RuCl2(NO)L] (I), (L = [(2-py)(2)PC2H4PO2(2-py)](-)) was obtained from recrystallization of RuCl3NO(d2pype) (d2pype = (2-py)(2)PC2H4P(2-py)(2)) in the presence of HNO3, crystallizing in the monoclinic space group P2(1) (no. 4), with a = 8.012(4) Angstrom, b = 14.454(4) Angstrom, c = 9.353(3) Angstrom, beta= 105.77(3)degre...

The ruthenium(II) complex, [RuCl2(NO)L] (I), (L = [(2-py)2PC2H4PO2(2-py)]⁻) was obtained from recrystallization of RuCl3NO(d2pype) (d2pype = (2-py)2PC2H4P(2-py)2) in the presence of HNO3, crystallizing in the monoclinic space group P21 (no. 4), with a = 8.012(4) Å, b = 14.454(4) Å, c = 9.353(3) Å, β = 105.77(3)°, and Z = 2. Crystals of the DMSO sol...

Diazapyrenium units have been incorporated into the π-electron deficient components of four [2]pseudorotaxanes, four [2]catenanes, and two [2]rotaxanes, each having a dioxyarene-based macrocyclic polyether as the π-electron rich component. A dramatic increase in the association constants that characterize the formation of diazapyrenium-containing [...

Two bis(2-oxy-1,3-propylenedithio)tetrathiafulvalene-containing acyclic polyethers and two macrocyclic polyethers, each incorporating one bis(2-oxy-1,3-propylenedithio)tetrathiafulvalene unit and one p-phenylene ring, have been synthesized. The two acyclic polyethers are bound by cyclobis(paraquat-p-phenylene) with pseudorotaxane geometries in solu...

The construction of catenanes, comprised of between two and seven interlocked rings, has been achieved. Two tris-1,5-naphtho-57-crown-15 macrocycles template the formation of cyclobis(paraquat-4,4‘-biphenylene) to give a [3]catenane, which acts as a template for the construction of one and then another cyclobis(paraquat-p-phenylene) to give a [4]-...

Spontaneous resolution upon crystallization A cyclophane and two [2]catenanes possessing elements of planar chirality have been self-assembled in good yields. In particular, the [2]catenane (right) incorporating cyclobis(paraquat-1,5-naphthalene) and bis-1/5-dioxynaphtho[38]crown-10, possesses four elements of planar chirality and can exist as a mi...

Two large and five small rings interlock to give the [7]catenane depicted on the right. Every potential π-donor and π-acceptor recognition site within this molecule is utilized. Only the application of high pressure (12 kbar) made possible the efficient assembly of this exotic molecular compound, for which a solid-state structure was obtained by X-...

Zwei große und fünf kleinere Ringe sind im rechts schematisch abgebildeten [7]Catenan miteinander verkettet. In ihm werden alle vorhandenen π‐Donor‐ und π‐Acceptor‐Einheiten genutzt. Erst die Anwendung hohen Drucks (12 kbar) ermöglichte die effiziente Synthese dieser exotischen supramolekularen Verbindung, deren Struktur im Kristall röntgenographis...

The template-directed syntheses of three [2]rotaxanes are described. They all have dumbbell components, with both hydroquinone and resorcinol rings inserted into polyether chains terminated by tetraarylmethane stoppers, that become encircled during the key self-assembly processes by the tetracationic cyclophane, cyclobis(paraquat-p-phenylene), with...

The use of preformed poly-(propylene imine) dendrimers (DAB-dendr-(NH2)x) for the rapid and facile construction of high molecular weight carbohydrate-coated dendrimers (glyco-dendrimers) is presented. An efficient attachment of spacer-armed derivatives of D-galactose and lactose to the primary amino end groups of DAB-dendr-(NH2)x has been achieved...

The self-assembly of three [3]-catenanes based on a single tetracationic cyclophane—cyclobis(bipyridinium-1,4-di-ethoxybenzene)—with pairs of identical interlocked crown ethers—bis-p-phenyl-ene[34]crown-10, bis-1,5-dioxynaphthal-ene[38]crown-10, or tetrafluoro-p-phenyl-ene-p-phenylene[34]crown-10—has been achieved in yields of 34, 31, and 33%, resp...

Thirty-six peripheral glucopyranosidic units are placed in the higher generation dendrimer prepared by a convergent growth strategy from dendimer wedges and an acid core (see schematic drawing on right). These compounds permit a novel entry into hitherto unknown neoglycoconjugate systems, which can be used for studying carbohydrate-protein interact...

36 Glucopyranosid‐Einheiten befinden sich an der Peripherie eines Dendrimers höherer Generation (siehe schematische Darstellung rechts), das durch konvergentes Wachstum aus einem Kernmolekül und Dendrimer‐Segmenten hergestellt wurde. Mit dieser Verbindung ist ein allgemeiner und flexibler Einstieg in eine bislang unbekannte Klasse von Neoglycokonju...

A range of pi-electron-rich macrocyclic polyethers incorporating dioxybenzene (hydroquinone) and/or dioxynaphthalene units have been synthesized in good yields by simple two-step procedures. These macrocycles are able to bind bipyridinium-based guests as a result of a series of cooperative noncovalent bonding interactions. These molecular recogniti...

Photochemical control of a self-assembled supramolecular 1:1 pseudorotaxane (formed between a tetracationic cyclophane, namely the tetrachloride salt of cyclobis(paraquat-p-phenylene), and 1,5-bis[2-(2-(2-hydroxy)ethoxy)ethoxy]naphthalene) has been achieved in aqueous solution. The photochemical one-electron reduction of the cyclophane to the radic...

The synthesis of carbohydratecontaining dendrimers has been achieved by a convergent growth approach. The synthetic strategy involves: 1) the synthesis of the triglucosylated derivative of tris(hydroxymethyl)methylamine (TRIS), 2) the introduction of a glycine-derived spacer and 3,3′-iminodipropionic acid derived branching units on to the TRIS deri...

The serendipitous discovery of the silyl shift on the secondary rim of the CD rings gives us the opportunity to report a novel, highly efficient synthetic strategy for the preparation of some chemically-modified CDs. This approach, relying on the readily-available per(2,6-di-O-TBDMS)-CDs 1a-c as key intermediates, has proved to be extremely useful...

Irradiation of trans-Rh(PMe(3))(2)(CO)Cl (1) in benzene/THF (1:3 v/v) at 230 K in the absence of CO affords three main products Rh(PMe(3))(2)(CO)(Cl)(Ph)H (two stereoisomers) (2 and 3) and trans-Rh(PMe(3))(2)(CO)Ph (4). Both 2 and 3 have phenyl and hydride groups cis and 2 has phenyl trans to CO. All three products revert to 1 (thermally) if the re...

The title structure, [Rh2Br6(C3H9P)4] (1), consists of neutral [mu-Br2-{RhBr2(PMe3)2}2] bromide-bridged rhodium dimers. The Rh-P bond lengths are 2.273 (5) and 2.266 (5) angstrom.

The new unsymmetrical bipyridyl ligand 6,6′-dimethyl-3-nitro-2,2′-bipyridine was prepared via coupling of 6-methyl-2-trimethylstanniopyridine and 2-chloro-6-methyl-3-nitropyridine in the presence of [Pd(PPh3)2Cl2]. Reduction of the nitro group afforded 3-amino-6,6′-dimethyl-2,2′-bipyridine (L), a model for the central subunit of the antitumour drug...

The new complexes Rh(P(CH3)3)2(CO)CH3 and Rh(P(CH3)3)2(CO)Ph were synthesized from Rh(P(CH3)3)2(CO)CI. The phenyl complex was synthesized by two routes, first by direct substitution of Rh(P(CH3)3)2(CO)CI Using diphenylmagnesium and second from the methyl derivative Rh(P(CH3)3)2(CO)CH3 by irradiation in the presence of benzene. Rh(P(CH3)3)2(CO)Ph re...

The synthesis and single-crystal X-ray structure determination of the title compound are described. The crystals are monoclinic, P21/c, a 10.064(2), b 13.096(2), c 17.722(3) Ǻ, β 104.68(2)°; the structure was refined to a residual of 0.033 for 3138 independent observed reflections. The coordination about zinc is intermediate between four- and five-...

Protonation of FeH2(DMPE)2 [DMPE = 1,2-bis(dimethylphosphino)ethane] by arene- or alkanethiols affords the molecular hydrogen complex [Fe(H2)H(DMPE)2]+, in which the weakly bound η2-coordinated H2 is readily displaced by alkane- and arenethiolates to give FeH(RS)(DMPE)2 and Fe(RS)2(DMPE)2. Both the thiolate iron hydrides and the iron dithiolates ex...

Conversion from native forest to plantation forest can have significant impacts on the transformation of soil cmbon and associated nutrients, including soil phosphorus (P) Results from a paired-site study in southeast Queensland, using both chemical fractionation and 31p NMR spectroscopy, demonstrated that conversion from natural forest to hoop pin...

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