A5053540418- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Asymmetric Hydrogenation and Catalysis
- Coordination Chemistry and Organometallics
- Click Chemistry and Applications
- Porphyrin and Phthalocyanine Chemistry
- Innovative Microfluidic and Catalytic Techniques Innovation
- Metal complexes synthesis and properties
- Axial and Atropisomeric Chirality Synthesis
- Chemical Synthesis and Analysis
- Organophosphorus compounds synthesis
- Polymer Nanocomposites and Properties
- Cancer therapeutics and mechanisms
- Nanomaterials for catalytic reactions
- Epoxy Resin Curing Processes
- Metal-Catalyzed Oxygenation Mechanisms
- Molecular spectroscopy and chirality
- Crystallography and molecular interactions
- Bioactive Compounds and Antitumor Agents
- vaccines and immunoinformatics approaches
- Advancements in Solid Oxide Fuel Cells
- Layered Double Hydroxides Synthesis and Applications
- Dielectric materials and actuators
- Radical Photochemical Reactions
- Enzyme Structure and Function
The University of Sydney
2005-2024
University of Technology Sydney
2004
Abstract The effect of rubber nanoparticles on mechanical properties and fracture toughness was investigated. Rubber 2–3 nm were in situ synthesized epoxy taking advantage the reaction an oligomer diamine with epoxy. chemical verified by gel permeation chromatography (GPC) 1 HNMR, microstructure characterized transmission electron microscope. caused much less Young's modulus deterioration but toughened to a similar degree comparison their peer liquid that formed microscale particles during...
ADVERTISEMENT RETURN TO ISSUECommunicationNEXTA Novel Method for Preparation of Disorderly Exfoliated Epoxy/Clay NanocompositeJun Ma, Zhong-Zhen Yu, Qing-Xin Zhang, Xiao-Lin Xie, Yiu-Wing Mai, and Ian LuckView Author Information Centre Advanced Materials Technology (CAMT), School Aerospace, Mechanical Mechatronic Engineering J07, Chemistry, University Sydney, New South Wales 2006, Australia Cite this: Chem. Mater. 2004, 16, 5, 757–759Publication Date (Web):February 14, 2004Publication...
Cyclic tetrapeptides have generated great interest because of their broad-ranging biological properties. In order to synthesize these highly strained 12-membered cyclic compounds, a cyclization strategy using pseudoprolines as removable turn inducers has been developed. The pseudoproline derivatives induce cisoid amide bond in the linear peptide backbone which facilitates cyclization. After cyclization, can be readily removed afford containing serine or threonine residues.
Abstract Aryl amines are synthesized from halobenzenes via copper mediated reactions employing sodium azide under mild conditions in ethanol/water. The reaction proceeds stepwise the aryl azide, which is reduced to corresponding amine in‐situ . methodology allows syntheses of para ‐, meta ‐ and ortho ‐bromobenzenes bearing electron withdrawing groups. Bifunctional alkanoyl chains with terminal bromides selectively transformed, generating an aniline aliphatic as this position stable...
Abstract Mycobacterium tuberculosis infects over 10 million people annually and kills more each year than any other human pathogen. The current (TB) vaccine is only partially effective in preventing infection, while TB treatment problematic terms of length, complexity patient compliance. There an urgent need for new drugs to combat the burden disease natural environment has re-emerged as a rich source bioactive molecules development lead compounds. In this study, one species marine sponge...
Selective azidation-amination of long-chain alkanoyl halobenzenes with sodium azide, promoted by copper(I) chloride, is reported. The protocol is, apart from CuCl and NaN3, additive free allows the isolation versatile amine-azides. Alkyl cleavage occurs as a side reaction through an unusual Schmidt-type azide insertion adjacent to carbonyl group, forming alkyl nitriles possibly via radical pathways. Mechanistic studies involving 15N labeling experiments test substrates indicate that...
Abstract Local molecular environment effects on the rates of ligand exchange at an asymmetric di[dihydroxotin(IV)] bis‐porphyrin 5 are examined. The host possesses four non‐equivalent tin(IV)–ligand binding sites that distinguished by their position relative to a shallow cavity, steric each site and electronic‐structure differences between constituent porphyrin quinoxalinoporphyrin macrocycles. These design features confirmed X‐ray crystal structure analysis. Binding experiments with...
Cyclometalation of 2-phenylpyridine with the η5:κS-indenyl-sulfanyl and -sulfinyl rhodium dichloride complexes rac-8, (pR*,RS*)-9, (pR*,SS*)-9 in presence AgSbF6 provided rhodacyclic 10, 11, 12, respectively, yields ranging from 72% to 92%. The were obtained as mixtures chiral-at-metal epimers, ratios epimer phenyl ligand anti indenyl benzo-ring [(pR*,SRh*)] syn [(pR*,RRh*)] 3:2, 10:1, 2:5 for establishing that sulfoxide chirality has a significant role stereocontrol metal-centered initially...
The complexes Ru(L1−CH3)(CO)3Cl, RuL2(CO)2Cl2, and RuL3(CO)2Cl2 (L1= 6-methoxy-5,8-quinolinedione, L2 = 7-amino-6-methoxy-5,8-quinolinedione, L3 6,6'-dimethoxycarbonyl-2,2'-bipyridine) were prepared by reaction of L1−L3 with the tricarbonyldichlororuthenium(II) dimer. act as bidentates through ortho oxygen atoms, pyridyl nitrogen adjacent quinone oxygen, bipyridyl nitrogens, respectively. is characterized X-ray crystallography. 15N NMR correlation spectra give upfield shifts around 60 ppm...
The mixed ionic–electronic conductor 6H-Ba4Ta2O9 undergoes an unconventional symmetry-lowering lattice distortion when cooled below 1100 K in the presence of atmospheric water. This temperature corresponds to onset hydration, which reaches a maximum value for 6H-Ba4Ta2O9·1/2H2O ∼500 K. We use combination diffraction, ab initio calculations, and spectroscopy show that both processes are intimately linked. very large Ba2+ cations octahedral interstitial sites (B its hexagonal perovskite-type...
Abstract The 15 N‐labelled iron dinitrogen complexes trans ‐[FeH(N 2 )(PP) ] + [BPh 4 − (PP = dppe, depe, dmpe) and cis )(PP 3 )] were prepared in situ by exchange of unlabelled coordinated with N . NMR chemical shifts coupling constants are reported. spectra exhibit separate signals for the metal‐bound terminal nitrogen atoms resonances display N, as well 31 P, long‐range 1 H when there is a hydrido ligand. Exchange between free was monitored magnetization transfer sites using an...
Abstract The full 1 H and 119 Sn NMR spectral assignments for a di[dihydroxotin(IV)] bis‐porphyrin supramolecular host I the di[diacetatotin(IV)] complex II are presented. Despite lack of varied chemical functionality in these molecules, all their 64 proton environments non‐equivalent. This is due to asymmetry afforded by Tröger's base (methanodiazocine) bridge between porphyrin quinoxalinoporphyrin macrocycles. methanodiazocine imparts chirality concavity on framework quinoxalino link one...
The previously described phosphino-alcohol α,α-dimethyl-2-(diphenylphosphino)benzenemethanol 2 and hydridophosphorane 6 (derived from the reaction of 2-lithio(diphenylphosphino)benzene with (−)-fenchone) are shown by 31P{1H} NMR saturation transfer experiments to be in equilibrium alternative closed chain P(V) tautomer σ5-P open-chain P(III) σ3-P 6, respectively. Using standard basis sets, density function theory (DFT)-calculated constant for ⇌ is vary several orders magnitude; this was...
Abstract The assignments of the two pyridyl nitrogens and amino in antitumour antibiotic streptonigrin, all carbon resonances, were determined by 15 N (HSQC, HMBC) 13 C NMR techniques. These data provide useful probes for determination site(s) metal complexation drug, which are important mechanism activity. Copyright © 2002 John Wiley & Sons, Ltd.