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Australian Journal of Chemistry

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ISSN (Print) 0004-9425
Published by CSIRO Publishing

[29 journals]

Research Front on Coordination Polymers
- Authors: Christopher J. Sumby
  First page: 397
  Abstract: Christopher J. Sumby - Volume 66(4)
  This Research Front, dedicated to Coordination Polymers (materials also known as metal-organic frameworks), comprises a selection of papers representing the current look of this rapidly growing field. These materials have crystalline porous structures with potential applications in areas such as gas storage, separations, catalysis, biomedicine, and sensing.
  Citation: Australian Journal of Chemistry - Volume 66(4)
  PubDate: 2013-04-15
  DOI: 10.1071/CH13052
  Issue No: Vol. 66, No. 4 (2013)
Polyoxometalate Insertion into Cu–pz Porous and Cu-bim Knighthead Coordination Polymers: [{Cu 4 (pz) 5.5 }{Cu 2 (2,2′-bim) 3 } 0.5 {P 2 W 18 O 62 }]·H 2 O
- Authors: Yanglei Xu|Jiang Wu|Kai Yu|Zhanhua Su|Chunxiao Wang|Chunmei Wang|Baibin Zhou
  Abstract: Yanglei Xu, Jiang Wu, Kai Yu, Zhanhua Su, Chunxiao Wang, Chunmei Wang, Baibin Zhou
  As a new 3D unit, two transition-metal complex (TMC) cations [Cu2(2,2′-bim)3]0.5 2+ and [Cu8(pz)11]0.5 4+ are introduced to [P2W18O62]6–, leading to assembly of the first Wells-Dawson type framework linked by TMC subunits, with cage-like and pillar bolt-type cations.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-05-17
  DOI: 10.1071/CH13111
Stable Molecular Complex of Squaric Acid with 2-(Quinuclidinium)propionate
- Authors: Zofia Dega-Szafran|Andrzej Katrusiak|Miroslaw Szafran
  Abstract: Zofia Dega-Szafran, Andrzej Katrusiak, Miroslaw Szafran
  Squaric acid (H2SQ) forms a complex with 2-(quinuclidinium)propionate (QNPr). The molecules of H2SQ and zwitterions of QNPr are bridged by two strong non-equivalent O–H?O hydrogen bonds of 2.476(2) and 2.482(1) Å. The complex is investigated by X-ray diffraction, FTIR and NMR techniques, and the results are supported by DFT calculations.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-05-17
  DOI: 10.1071/CH13121
Novel Electric Responsive Columnar Liquid Crystals based on Perylene Tetra sec-alkyl Ester Derivatives
- Authors: Lei Wang|Qing Cui|Xiao-Fang Chen|Yang Li|Zheng-Qiang Li|Dong Wang|Huai Yang
  Abstract: Lei Wang, Qing Cui, Xiao-Fang Chen, Yang Li, Zheng-Qiang Li, Dong Wang, Huai Yang
  A series of perylene tetra sec-alkyl ester compounds were newly synthesised and exhibited a columnar phase at room temperature. PS8 could perpendicularly orient to the applied electric field. Well organised face-on alignment was achieved on indium tin oxide-covered glass by thermal annealing.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-05-15
  DOI: 10.1071/CH13057
Effects of Nuclear Vibrations on the Energetics of Polythiophene: Quantized Energy Molecular Dynamics
- Authors: Sergei Manzhos
  Abstract: Sergei Manzhos
  The molecular dynamics of polythiophene were computed with a new algorithm including the quantized nature of vibrations. The algorithm reproduces the quantum energies of vibrational modes (black line and blue dots), lost in standard MD (red line, blue triangles). Nuclear dynamics have a significant effect on donor energetics and the performance of organic solar cells.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-05-15
  DOI: 10.1071/CH13112
Electrochemical Characterisation of Poly(aniline-co-N-methylaniline) and Poly(aniline-co-N-ethylaniline) Films on Pencil Graphite Electrode for Supercapacitor Applications
- Authors: Andac Arslan|Evrim Hur
  Abstract: Andac Arslan, Evrim Hur
  Poly(aniline-co-N-methylaniline) and poly(aniline-co-N-ethylaniline) coated pencil graphite electrodes have been electrochemically characterised by different methods and their specific capacitance values have been determined. They can be used as electrode active material for low voltage supercapacitor applications.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-05-14
  DOI: 10.1071/CH13083
Ionic Liquids with Solvatochromatic and Charge-Transfer Functionalities Incorporating the Viologen Moiety
- Authors: H. Q. Nimal Gunaratne|Peter Nockemann|Sonia Olejarz|Stephanie M. Reid|Kenneth R. Seddon|Geetha Srinivasan
  Abstract: H. Q. Nimal Gunaratne, Peter Nockemann, Sonia Olejarz, Stephanie M. Reid, Kenneth R. Seddon, Geetha Srinivasan
  ‘Liquid viologen’ derivatives are synthesised and their solvatochromic and charge transfer properties are demonstrated.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-05-09
  DOI: 10.1071/CH13054
‘Classical’ and ‘Abnormal’ Bonding in Tin (II) N-Heterocyclic Carbene Complexes
- Authors: Robert S. P. Turbervill|Jose M. Goicoechea
  Abstract: Robert S. P. Turbervill, Jose M. Goicoechea
  Reaction of Sn(OTf)2 (OTf– = OSO2CF3 –) with one and two equivalents of 1,3-bis(2,6-diisopropylphenyl)-imidazol-2-ylidene (IPr) yielded the complexes [Sn(IPr)(OTf)2] (1) and [Sn(IPr)(aIPr)(OTf)][OTf] (2), respectively. Both compounds display an NHC ligand bonded to tin(ii) via the C2 carbon in a ‘classical’ mode, while 2 also contains an ‘abnormal’ C4/C5-bonded carbene.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-04-26
  DOI: 10.1071/CH13115
A Much-Needed Mechanism and Reaction Rate for the Oxidation of Phenols with ClO 2 : A Joint Experimental and Computational Study
- Authors: Carlos Alberto Huerta Aguilar|Jayanthi Narayanan|Mariappan Manoharan|Narinder Singh|Pandiyan Thangarasu
  Abstract: Carlos Alberto Huerta Aguilar, Jayanthi Narayanan, Mariappan Manoharan, Narinder Singh, Pandiyan Thangarasu
  The kinetics of phenol oxidation with chlorine dioxide were analysed; 2,4,6-trichlorophenol exhibits a lower oxidation rate than the other phenols in agreement with the Hammett plot. The reaction is second order with respect to phenol and first order with respect to ClO2. A mechanism is proposed and is supported by DFT computations. The activation barriers predicted the observed reaction trend.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-04-26
  DOI: 10.1071/CH13101
C-Alkynylation of Chromones by Sonogashira Reaction
- Authors: Tamás Patonay|István Pazurik|Anita Ábrahám
  Abstract: Tamás Patonay, István Pazurik, Anita Ábrahám
  Sonogashira reaction of bromochromones and -flavones with various terminal alkynes gave the desired alkynylated products. Chromones and flavones with ethynyl functionality were prepared by removal of the trimethylsilyl protecting group.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-04-24
  DOI: 10.1071/CH13006
Trichloridothallium(III) Complexes with Bipyridine Derivatives: From Structure to Luminescence Properties
- Authors: Zahra Ghiasi|Vahid Amani|Peiman Mirzaei|Nasser Safari|Anita Abedi
  Abstract: Zahra Ghiasi, Vahid Amani, Peiman Mirzaei, Nasser Safari, Anita Abedi
  Octahedral thallium(iii) complexes of [Tl(L)Cl3(DMSO)] (where L is a bipyridine derivative) exhibit enhanced fluorescence intensity in comparison with the related unbound bipyridine ligands, where a Tl complex with 4,4′-ditert-butyl-2,2′-bipyridine illustrates an extremely intense emission. The observation of 203,205Tl–1H spin–spin coupling in the 1H NMR spectrum confirms the stability of the titled complexes in DMSO.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-04-24
  DOI: 10.1071/CH12549
Supramolecular Interaction of Gliclazide with Cucurbit[7]uril and its Analytical Application
- Authors: Guang-Quan Wang|Yan-Fang Qin|Li-Ming Du|Yun-Long Fu
  Abstract: Guang-Quan Wang, Yan-Fang Qin, Li-Ming Du, Yun-Long Fu
  The competing reactions and the supramolecular interaction mechanisms between gliclazide (GLZ) and palmatine as they fight for occupancy of the cucurbit[7]uril (CB[7]) cavity were studied using spectrofluorimetry, 1H NMR spectroscopy, and molecular modelling calculations. Based on the significant quenching of the supramolecular complex fluorescence intensity, a fluorescent probe method of high sensitivity was developed to determine GLZ in its pharmaceutical dosage forms and in human plasma with good precision and accuracy.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-04-17
  DOI: 10.1071/CH13087
Demonstrating the Use of Bisphenol A-functionalised Gold Nanoparticles in Immunoassays
- Authors: Joshua R. Peterson|Yang Lu|Erwann Luais|Nanju Alice Lee|J. Justin Gooding
  Abstract: Joshua R. Peterson, Yang Lu, Erwann Luais, Nanju Alice Lee, J. Justin Gooding
  Gold nanoparticles modified with small molecules to which antibodies have been raised are shown to be able to facilitate selective binding of antibodies to these surfaces. In this case, the small molecule demonstrated is bisphenol A. This work has implications for using small-molecule-modified nanoparticles in a host of new immunoassays and immunosensors as well as highlighting their potential as substitutes for protein–hapten conjugates.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-04-08
  DOI: 10.1071/CH13043
Chemoselective Activation Strategies of Amidic Carbonyls towards Nucleophilic Reagents
- Authors: Vittorio Pace|Wolfgang Holzer
  Abstract: Vittorio Pace, Wolfgang Holzer
  Important advancements have been made in recent years in the development of chemoselective additions of nucleophiles to well known inert amide carbonyls in the presence of multi-electrophilic substrates. Herein, we present the most relevant results showing how carbonyl amides can be chemoselectively functionalised in the presence of electrophilic functionalities such as Weinreb amides.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-04-05
  DOI: 10.1071/CH13042
Water-Assisted Organocatalysis: An Enantioselective Green Protocol for the Henry Reaction
- Authors: Prashant B. Thorat|Santosh V. Goswami|Wamanrao N. Jadhav|Sudhakar R. Bhusare
  Abstract: Prashant B. Thorat, Santosh V. Goswami, Wamanrao N. Jadhav, Sudhakar R. Bhusare
  We report an enantioselective Henry (nitroaldol) reaction catalysed by an organocatalyst using water as solvent. The enantioselective synthesis of β-nitroalcohols was achieved by using neutral chiral organocatalyst through strong hydrogen bonding which results in the formation of corresponding products in excellent yield and enantioselectivity at room temperature.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-04-05
  DOI: 10.1071/CH12428
Critical Review of Water Radiolysis Processes, Dissociation Products, and Possible Impacts on the Local Environment: A Geochemist
- Authors: Soumya Das
  Abstract: Soumya Das
  When liquid water is subjected to ionizing radiation it breaks down to hydrogen, hydroxyl, superoxide, and peroxide radicals, and solvated electrons all of which have the potential to change redox conditions in subsurface environments. This process might have an adverse effect in trace metal partitioning in nature.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-04-03
  DOI: 10.1071/CH13012
Synthesis of a Novel Diol-Functionalized Poly(ethylene glycol)-Bridged Dicationic Ionic Liquid and its Application in Copper-Catalyzed Amination of Aryl Halides
- Authors: Yinglei Wang|Jun Luo|Tianjiao Hou|Zuliang Liu
  Abstract: Yinglei Wang, Jun Luo, Tianjiao Hou, Zuliang Liu
  A novel diol-functionalized poly(ethylene glycol)-bridged dicationic ionic liquid ([diol-PEG1000-DIL][PF6]) was prepared and used as an efficient and reusable ligand for copper-catalyzed amination.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-03-27
  DOI: 10.1071/CH12487
Synthesis and Electroluminescence of Thieno-[3,4-b]-pyrazine-cored Molecule with Fluorinated Shell
- Authors: Di Liu|Qing Li|Renjie Wang
  Abstract: Di Liu, Qing Li, Renjie Wang
  A novel thieno-[3,4-b]-pyrazine-cored molecule with a perfluorinated shell serves as a red fluorescent emitter in non-doped organic light-emitting diodes and exhibits good electroluminescence.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-03-27
  DOI: 10.1071/CH12561
Improving the Yield of the Exhaustive Grignard Alkylation of N-Benzylphthalimide
- Authors: Viraj C. Jayawardena|Kathryn E. Fairfull-Smith|Steven E. Bottle
  Abstract: Viraj C. Jayawardena, Kathryn E. Fairfull-Smith, Steven E. Bottle
  A new two-stage Grignard synthesis offers a practical preparative scale alternative to the current approach to generate tetraalkylisoindolines.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-03-25
  DOI: 10.1071/CH12528
Synthesis and Cytotoxicity Evaluation of Some Novel 1-(3-Chlorophenyl)piperazin-2-one Derivatives Bearing Imidazole Bioisosteres
- Authors: Saeed Ghasemi|Simin Sharifi|Soodabeh Davaran|Hosein Danafar|Davoud Asgari|Javid Shahbazi Mojarrad
  Abstract: Saeed Ghasemi, Simin Sharifi, Soodabeh Davaran, Hosein Danafar, Davoud Asgari, Javid Shahbazi Mojarrad
  1-(3-Chlorophenyl)piperazin-2-one derivatives as anticancer agents were synthesised by bioisosteric replacement of the imidazole ring of L-778123 (an anticancer agent) and evaluated against cancer cell lines. The 1-amidinourea derivative showed better cytotoxic activity.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-03-25
  DOI: 10.1071/CH13031
Multi-Bond Forming Processes in Efficient Synthesis
- Authors: Nicholas J. Green|Michael S. Sherburn
  Abstract: Nicholas J. Green, Michael S. Sherburn
  The perfect synthesis is just one step away! Complex targets are being made in fewer operations. This review classifies the strategies for short syntheses, presents landmark recent examples, and offers predictions about the future.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-03-18
  DOI: 10.1071/CH13003
A Review of Catalytic Systems for Glycerol Oxidation: Alternatives for Waste Valorization
- Authors: Juan Carlos Beltrán-Prieto|Karel Kolomazník|Jiří Pecha
  Abstract: Juan Carlos Beltrán-Prieto, Karel Kolomazník, Jiří Pecha
  The oxidation of glycerol that is generated as a by-product of the transesterification of animal fat and vegetable oils leads to the formation of aldehydes, carboxylic acids, and ketones. It is one of the most important challenges in chemistry because the conversion and selectivity for a specific product vary according to the reaction conditions, catalyst selected, and oxidation method.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-03-14
  DOI: 10.1071/CH12514
A Colorimetric Aptamer Biosensor Based on Gold Nanoparticles for the Ultrasensitive and Specific Detection of Tetracycline in Milk
- Authors: Lan He|Yanfang Luo|Wenting Zhi|Yuangen Wu|Pei Zhou
  Abstract: Lan He, Yanfang Luo, Wenting Zhi, Yuangen Wu, Pei Zhou
  This paper proposes a sensing strategy which employs aptamer, unmodified gold nanoparticles (AuNP), and hexadecyltrimethylamonium bromide to detect tetracycline in raw milk. The method is based on the colourimetric assays via aggregating AuNP, and the detection limit is 122 Nm.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-03-13
  DOI: 10.1071/CH12446
Synthesis, Chemical Characterisation, and DNA Binding Studies of Ferrocene-Incorporated Selenoureas
- Authors: Raja Azadar Hussain|Amin Badshah|Muhammad Nawaz Tahir|Bhajan Lal|Inayat Ali Khan
  Abstract: Raja Azadar Hussain, Amin Badshah, Muhammad Nawaz Tahir, Bhajan Lal, Inayat Ali Khan
  The interaction between cationic 1-(3-fluorobenzoyl)-3-(4-ferrocenylphenyl)selenourea (P3F) and the anionic phosphate backbone of DNA causes a variation of peak current and peak potential in cyclic voltammetry. The variation in peak current provided a DNA binding constant of 4.702 × 104 M–1 and a negative shift in the peak potential is indicative of an electrostatic interaction.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-03-12
  DOI: 10.1071/CH12570
New Elements on the Behaviour of a Bissulfinylmethyl Radical
- Authors: Rocio Martinez Mallorquin|Guillaume Vincent|Etienne Derat|Max Malacria|Jean-Philippe Goddard|Louis Fensterbank
  Abstract: Rocio Martinez Mallorquin, Guillaume Vincent, Etienne Derat, Max Malacria, Jean-Philippe Goddard, Louis Fensterbank
  The generation of a bissulfinylmethine radical from the corresponding TEMPO and phenylselenyl bissulfoxide precursors has been studied. No univocal formation of the bissulfinyl radical has been observed in thermal or photochemical conditions. Instead, complex mixtures have been obtained, showing prominent C–S homolytic bond cleavage, which has been supported by calculations.
  Citation: Australian Journal of Chemistry
  PubDate: 2013-03-07
  DOI: 10.1071/CH12545