Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
Australian Journal of Chemistry

Australian Journal of Chemistry

Volume 69 Number 4 2016

RESEARCH FRONT: 5th Molecular Materials Meeting (M3) @ Singapore

CHv69n4_FOThe 5th Molecular Materials Meeting (M3) @ Singapore

Yun Zong and T. S. Andy Hor
pp. 361-362
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This foreword introduces some selected papers presented at the 5th Molecular Materials Meeting in Singapore (M3@Singapore) from 3 to 5 August 2015 that was organized by the Institute of Materials Research and Engineering (IMRE) of A*STAR, Singapore. The conference brought together leading researchers in the disciplines of chemistry, materials science, physics, biology, medicine, and engineering to discuss advances in molecular materials and cultivate cross-disciplinary research.

CH15636Cationic Micelles Based on Polyhedral Oligomeric Silsesquioxanes for Enhanced Gene Transfection

Connie K. Liu, Qingqing Dou, Sing Shy Liow, Jatin N. Kumar and Xian Jun Loh
pp. 363-371
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Poly(2-(dimethylamino)ethyl methacrylate)-poly(methacrylate isobutyl polyhedral oligomeric silsesquioxane) (PDMAEMA-POSS) copolymers were synthesized for co-gene and drug delivery. The hydrophobic POSS interior allows incorporation of hydrophobic drugs, and the PDMAEMA corona allows the complexation of DNA to form a nano-sized polyplex. These copolymers display excellent gene transfection efficiency when compared with PEI or PDMAEMA homopolymers.

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Molecular dynamics simulations of oxaliplatin enantiomeric analogues, trans-R,R-, trans-S,S-, and cis-DACH-Pt-DNA adducts, and undamaged DNA were performed to probe for stereoselectivity-based conformational differences and explain their different anti-tumour activities.

CH15659An Injectable Double-Network Hydrogel for Cell Encapsulation

Pei Lin Chee, Lakshmi Lakshmanan, Shan Jiang, Hongye Ye, Dan Kai and Xian Jun Loh
pp. 388-393
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We show in this study that the double-network system can also be used to synthesize an injectable gel made up of poly(ethylene glycol) methyl ether methacrylate and sodium alginic acid. The results of a cell cytotoxicity test and preliminary cell encapsulation study showed good cell compatibility, suggesting that the hydrogels could potentially be used for cell delivery.

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Reactive –OH groups at ZrO2 nanostructures promote dehydrogenation of HCOOH to CO2 (at Pd) and induce oxidative removal of poisoning intermediates (at Pt and Pd). Polytungstate adsorbates on Pd or Pt nanoparticles interact competitively with the poisoning CO intermediates at noble metal catalytic sites (‘third-body’ effect).

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Diketopyrrolopyrrole-based conjugated polymers with siloxane side chains are synthesized and these polymers show good optical contrasts in the visible and near-infrared regions, high stability, as well as coloration efficiency of up to 408 cm2 C–1.

CH15744Polyaniline-Supported Bacterial Biofilms as Active Matrices for Platinum Nanoparticles: Enhancement of Electroreduction of Carbon Dioxide

Ewelina Seta, Weronika A. Lotowska, Iwona A. Rutkowska, Anna Wadas, Adrianna Raczkowska, Marta Nieckarz, Katarzyna Brzostek and Pawel J. Kulesza
pp. 411-418
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A hybrid support composed of a polyaniline underlayer, Yersinia entrocolitica biofilm, and an overlayer of multiwalled carbon nanotubes significantly enhances the activity of platinum nanoparticles towards the reduction of carbon dioxide, rather than hydrogen evolution, in neutral medium (phosphate buffer at pH 6.1).

CH15652Efficient Synthesis of All-Aryl Phenazasilines for Optoelectronic Applications

Shen Xu, Huanhuan Li, Yuting Tang, Runfeng Chen, Xiaoji Xie, Xinhui Zhou, Guichuan Xing and Wei Huang
pp. 419-422
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An efficient metal-free radical-catalyzed intramolecular silylation method has been developed for the preparation of all-aryl phenazasilines. The as-synthesized all-aryl phenazasiline, 5,10,10-triphenyl-5,10-dihydrophenazasiline, exhibits excellent solubility, high thermal stability, and good optoelectronic properties, which are highly attractive for optical and electronic applications in organic electronics.

CH15660Au-Pd Bimetallic Nanoparticle Electrodes for Direct Electroreduction of Hexavalent Chromium Complexes

Roozbeh Siavash Moakhar, Mohiedin Bagheri Hariri, Ajay Kushwaha, Abolghasem Dolati, Mohammad Ghorbani and Gregory Kia Liang Goh
pp. 423-430
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An electrochemical sensor based on a Au-Pd bimetallic nanoparticle-decorated indium tin oxide electrode was used for CrVI detection for the first time. The proposed method showed high selectivity and stability for CrVI electrodetection. The sensor was successfully applied to water samples from real world sources.

CH15730Empirical Formulae in Correlating Droplet Shape and Contact Angle

Ten It Wong, Hao Wang, Fuke Wang, Sau Leng Sin, Cheng Gen Quan, Shi Jie Wang and Xiaodong Zhou
pp. 431-439
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Our studies on water droplets with various volumes and contact angles show that the volume, contact angle, height, and width calculated by the spherical dome model have errors in the range of 5–25 %, whereas our empirical formulae can reduce these errors to 0.1–2 %.

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Three 3d–4f tetranuclear complexes Co2Ln2(L)10(bipy)2 (Ln = Dy 1, Ho 2, and Er 3), where HL and bipy are 2,3,5-trichlorobenzoic and acid 2,2′-bipyridine, have been synthesized hydrothermally and characterized. The tetranuclear clusters of 13 construct 2D layers by weak hydrogen bonds. Magnetic studies indicate ferromagnetic interactions between adjacent metal ions in complexes 1 and 3 and antiferromagnetic interactions in 2.

CH15472Thermal and Spectral Analysis of Novel Amide-Tethered Polymers from Poly(allylamine)

Paolo N. Grenga, Matthew J. Nethercott, Ayeisca E. Mateo, Mathew Patenaude, Todd Hoare, David P. Weliky and Ronny Priefer
pp. 458-466
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Using post-polymerization modification a library of amide-linked polyelectrolytes with tethered aliphatic, aromatic, and cubyl moieties were synthesized. The degree of amidation was determined by elemental analysis. The thermal (DSC/TGA) and spectral (13C SSNMR) properties of the polymers were also analyzed.

CH15402First Principle Study of Electronic and Non-Linear Optical (NLO) Properties of Triphenylamine Dyes: Interactive Design Computation of New NLO Compounds

Muhammad Ramzan Saeed Ashraf Janjua, Zain Hassan Yamani, Saba Jamil, Asif Mahmood, Imran Ahmad, Muhammad Haroon, Mudassir Hussain Tahir, Zhihua Yang and Shilie Pan
pp. 467-472
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The structure–property relationship indicates that the β value increases with increasing π-conjugating lengths. Based on experimental and theoretical explorations, the design of molecules with good second-order non-linear optical properties was primarily focussed on planar D­–π–A models (D = donor, A = acceptor).

CH15395Label-Free and Sensitive Detection of BRCA1 and TB4 DNA Sequences with Water-Soluble Cationic Polythiophenes

Shaohong Zhou, Huanhuan Ling, Yun Ma, Yan Zhou, Wenqi Du, Meifang Cui, Yong Xia, Liqiang Yan, Hongtao Yao and Zhengjian Qi
pp. 473-477
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A sensitive method for BRCA1 and TB4 DNA sequences detection using water-soluble cationic polythiophenes, poly(3-(1′-ethoxy-2′-N-methyl imidazole)thiophene) (PT) is presented. The fluorescence of PT would recover to its initial intensity after the addition of complementary ssDNA, whereas sequences with mismatched bases would not.

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