Australian Journal of Chemistry
Volume 68 Number 3 2015
RESEARCH FRONT: Dedication to Richard Langler
This issue of the Journal is a tribute to the life and work of Professor Richard (Rick) Francis Langler, who was a dedicated and inspirational teacher. Papers for this issue have been contributed by many of Rick’s former students, colleagues, and friends from all over the world.
CH14535Zwitterionic CS2 Adducts of Bis(dialkylphosphino)amines: Syntheses, Spectroscopy, and Structures
Bis(diisopropylphosphino)amine and bis(di-t-butylphosphino)amine form adducts with carbon disulfide that are not labile in solution. The formal charges of the zwitterion are delocalized across the S–C–S and P–N–P moieties.
CH14514Synthesis, Characterization, and Catalytic Activity of a Series of Aluminium–Amidate Complexes
Aluminium–amidate complexes have been prepared in multiple ligand-to-metal stoichiometries. The complexes have been characterized structurally and spectroscopically. The Al–amidate complexes were applicable pre-catalysts for both the MPV (Meerwein–Ponndorf–Verley) reduction of carbonyls and the Oppenauer oxidation of alcohols.
The synthesis, characterisation, and antifungal activities against five species of potentially pathogenic fungi are described within.
CH14577Synthesis of Sterically Demanding Bis(phosphinimine) Dibenzofuran Ligands and Subsequent Zinc Metalation
Cationic bis(phosphinimine)dibenzofuran-supported zinc complexes [LnZnIIEt][BArF4] were generated through reaction of cationic protonated ligands and [ZnEt2] via an alkane elimination pathway. The ligands provide unique steric environments to potentially prevent transesterification processes during lactide polymerization catalysis.
CH14598Serine and Cysteine π-Interactions in Nature: A Comparison of the Frequency, Structure, and Stability of Contacts Involving Oxygen and Sulfur
Serine (X = O) and cysteine (X = S) X–H···π or X···π interactions were identified and characterized in over 100 high-resolution X-ray crystal structures of DNA–protein complexes found in nature. Although few contacts were identified with DNA nucleobase π-systems, many interactions involve the aromatic amino acids, thus adding to the list of π-contacts that must be considered when analyzing the binding patterns and/or stability of biological macromolecules.
CH14603Generation of a Highly Stable Reusable Biocatalyst by Entrapment of an Oligomeric Enzyme in Ultra-Large-Pore Mesoporous Silica
Phenylalanine ammonia lyase entrapped in ultra-large-pore mesoporous silica generates a recyclable, separable biocatalyst. The entrapped materials showed excellent stabilization, even after significant exposure to prolonged heating and extremely high catalytic activity in the deamination of l-phenylalanine to trans-cinnamic acid in aqueous solution.
CH14556Asymmetric Remote C–H Functionalization: Use of Internal Olefins in Tandem Hydrometallation–Isomerization–Asymmetric Conjugate Addition Sequences
Hydrometallation of internal olefins with the Schwartz reagent gives the least hindered alkyl-zirconocene after thermal (60°C in THF) isomerization. After switching the solvent from THF to dichloromethane, the alkyl-zirconocenes can be used in copper-catalyzed asymmetric conjugate additions.
CH14284Friedel–Crafts Chemistry. Part 43. A Convergent Construction of Some New Bridged Aza-Bicyclic Analogues of Azocine, Azonine, and Azecine via Friedel–Crafts Ring Closures
Expedient methods for the synthesis of hitherto unrecorded fused bridged azatetracyclic azocines, azonines, and azecines via Friedel–Crafts cyclialkylations and cycliacylations of suitable synthesized tertiary alcohols and carboxylic acids are described.
CH14174Construction of CuII Cluster-Based Magnetic Metal–Organic Framework Derived from a V-Shaped Aromatic Dicarboxylate Ligand
A new three-dimensional Cu8-based magnetic metal–organic framework (MMOF) with a bcu topology net has been successfully obtained. Moreover, magnetic investigation of this complex suggests anti-ferromagnetic couplings between metal centres.
CH14240The Influence of Water and Metal Salt on the Transport and Structural Properties of 1-Octyl-3-methylimidazolium Chloride
We show the influence that two metal salts, zinc chloride and magnesium chloride, have on the transport properties of the nanostructured 1-methyl-3-octylimidazolium chloride, OMImCl, at varying water concentrations. The impact the metal salts have on the transport properties is directly related to their water structuring or destructing capabilities.
CH14303Electrochemical and Photoelectrochemical Investigation of New Self-Assembled Films Based on Prussian Blue and a Terpyridyl RuII Complex
A new hybrid multilayer film containing Prussian blue and a bis-terpyridyl RuII complex was uniformly fabricated, which exhibited a significant cathodic photocurrent density of 7.72 μA cm–2 for an 11-layer film, and three quasi-reversible redox couples associated with these two film-forming components.
CH14290Two CoII Compounds Showing Interesting Magnetic Properties Modulated by Supramolecular Interactions
Here two novel 3D frameworks are presented. Their magneto-structure is very similar; however, due to the distinct 2D structure and supramolecular interactions, different magnetic properties are observed in 1 and 2, such as spin-canting behaviour v. antiferromagnetic magnetic ordering.
CH14281Determination of Trace Arsenic Content in Commercial Crispbread by Hydride Generation Inductively Coupled Plasma Optical Emission Spectrometry
This paper describes the selection, optimization, and application of sample treatment for the determination of total As in various crispbreads by hydride generation inductively coupled plasma optical emission spectrometry (HG–ICP–OES). A simple and dependable method, i.e. without the need of previous sample total acidic digestion was proposed.
Metal nanostructures encapsulated by plasma-polymerized aminosilane film for biomolecular detection using surface plasmon resonance.
CH14239An Exploration of Organocatalyst 1,4-Diazabicyclo[2.2.2]octane in the Direct Regioselective and Chemoselective γ-Addition of β-Keto Amide on Isatin to Afford Structurally Diverse Molecular Frameworks
DABCO promoted efficient protocol is described for the regioselective and chemoselective γ-addition of β-keto amides on isatins to afford γ-(3-hydroxy-2-oxindole)-β-keto amide framework under metal-free condition. The developed method is environmentally benign in nature and applicable for variety of isatins as well as β-keto amides to provide new 3-hydroxy-2-oxindoles from readily available starting materials.
The understanding of the nature of tautomeric equilibria is relevant to the study of processes of both organic chemistry and biochemistry. In the present work, a study of ring–chain tautomerism in 2-cyanobenzoic acids was carried out by means of mass spectrometry.
CH14024Investigation of the Photodegradation of Reactive Blue 19 on P-25 Titanium Dioxide: Effect of Experimental Parameters
The use of reactive dyes has grown rapidly; however, ~20–50 % of these dyes are being discarded as coloured effluent. In this paper, systematic investigation of the effects of a wide range of reaction parameters on the catalytic photodegradation of the industrial dye Reactive Blue 19 (RB19) by titanium dioxide is reported.
CH14353Chitosan–Zinc Oxide Nanoparticles Combined with Dispersive Liquid–Liquid Microextraction for the Determination of BTEX in Water Samples
The effects of exposure to BTEX comprise change in the liver and harmful influences on the kidneys, lungs, heart and nervous system. A special attention is focussed on the methods that are characterized by a considerable reduction or complete elimination of organic solvents. Dispersive liquid-liquid microextraction method is simple, efficient and fast.
CH14348Dinuclear Lanthanide–Carboxylate Compounds: Field-Induced Slow Relaxation of Magnetization for Dysprosium(III) Analogue
Three chiral dinuclear lanthanide–carboxylate compounds with the chiral ligand of (S)-(+)-2-(6-methoxy-2-naphthyl)propionate have been synthesized and structurally and magnetically characterized. The Dy-based compound exhibits slow magnetization relaxation with an energy barrier of 17.24(2) K.
CH14025Lanthanide-Based Polymers with Charged Ligand Backbones: Triple-Stranded Chain Structures and their DNA Cleavage Studies
Four rare-earth metal complexes with one-dimensional chain structures are synthesised. All complexes can efficiently cleave DNA in the presence of H2O2, most probably via an oxidative cleavage mechanism. The high cleaving activities may be ascribed to the combinative effects of their polynuclear structures, trivalent lanthanide ions and quaternised moieties.
CH14327Regioselective Dye-Induced Photocleavage of Epoxides as an Alternative Mild Synthetic Route to a Targeted Alcohol Functionality
The regioselective cleavage of epoxides under visible light leading to ring opening and formation of the corresponding alcohol in excellent yields is reported in this study as an alternative mild synthetic approach.
Novel hyperbranched co-polymers HP1–HP4 with twisted acene units and truxene groups have been synthesised through Suzuki coupling reaction and characterised. The polymers show blue light emission in organic solvents and thin films, as well as high stability, which might be utilised as potential candidates for organic electronic materials.
A metal-free aerobic oxidative bromination of aromatic compounds in water has been developed.