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

Australian Journal of Chemistry

Volume 74 Number 8 2021

Graphical Abstract Image

Simple photo-bromination chemistry can be scaled up in a flow reactor using modern LED-based equipment, and crucially combined with in-line workup and purification. This integrated multi-stage operation provides a novel solution for the chemical manufacturing industry to use photochemistry and continuous flow reactors on an industrial scale.

CH21011Aptamer-Facilitated Design of Gold Nanoparticle-Based Logic Gates for Cyromazine and Melamine Detection in Milk

Haibo Xing, Xuelian Fei, Bowen Zheng, Xiyin Zheng, Xu Dang, Hongbo Zhang, Fuxiang Tian, Xiang Mei and Xiaojun Hu 0000-0001-8906-1165
pp. 574-583
Graphical Abstract Image

Three logic gates (OR, INHIBIT, and AND logic gates) were fabricated for the simultaneous detection of cyromazine and melamine by using the aptamer-facilitated design of AuNPs. With the INHIBIT gate, we could determine the presence of melamine.

CH21014The pKa of Pentazole (HN5)

Sanjeev Rachuru 0000-0002-6117-7112, Jagannadham Vandanapu 0000-0001-9152-7729 and Adam A. Skelton 0000-0003-0155-8287
pp. 584-590
Graphical Abstract Image

Addition of every pyridine type nitrogen (= N–) to the azole ring increases the N(1)–H acidity. This idea led to determining the pKa of pentazole by graphical extrapolation. In addition to this, theoretical calculations were performed to calculate the pKa of pentazole. The pKa of pentazole estimated by different methods is reported in this article.

CH21063Effect of Single/Mixed Surfactant Systems on Orientations of Liquid Crystals and Interaction of Proteins with Surfactants at Fluid Interfaces

Xiangrong Huang, Zhicheng Ye, Yazhuo Shang 0000-0002-1555-3260, Yifan He, Hong Meng, Yinmao Dong, Zhaohui Qu, Youting Liu, Shouhong Xu and Honglai Liu
pp. 591-600
Graphical Abstract Image

The properties of surfactants affect liquid-crystal (LC) based sensors significantly. However, studies are mostly limited to single surfactant systems and rarely involve mixed surfactant systems. Mixed surfactants-decorated LC-laden interfaces show an outstanding optical response for proteins, and thus the related different mechanisms have been proposed.

CH21054Reversible Fluorescence Switching of Donor–Acceptor Type Bipyridines by Simple Protonation–Deprotonation Equilibria

Shaik Mubeena, Meghana N, Gayatri Annapareddy, Yi-Sheng Chen, Monima Sarma 0000-0002-4358-6772 and Ken-Tsung Wong 0000-0002-1680-6186
pp. 601-606
Graphical Abstract Image

Three-level reversible fluorescence switching of donor–acceptor type bipyridine molecules by simple protonation–deprotonation equilibria is discussed with detailed analysis of the relevant steps. Site-specific protonation causes structural changes in absorbing and emitting species and their ratio, which leads to dramatic change in fluorescence.

CH21062A New Strategy Using a Fluorescent Probe Combined with Polydopamine for Detecting the Activity of Acetylcholinesterase

Yingying Chen 0000-0002-6440-0199, Wenxia Liu, Binbin Zhang, Zhiguang Suo, Feifei Xing and Lingyan Feng 0000-0001-9817-8680
pp. 607-612
Graphical Abstract Image

A perylene derivative-based fluorescent probe combined with polydopamine (PDA) was developed to monitor acetylcholinesterase activity. The optical signal switched off in the presence of PDA which spontaneously polymerizes from dopamine, while it was switched on in absence of PDA whose polymerization is inhibited by the hydrolysis product of acetylthiocholine catalyzed by acetylcholinesterase.

CH21040Stability, Structure, and Permeability Studies of Copper Tripeptide Species in Aqueous Solution

Ahmed N. Hammouda 0000-0002-7816-0261, Fatin M. Elmagbari, Graham E. Jackson, Giselle M. Vicatos, Raffaele P. Bonomo and Gabriele Valora
pp. 613-622
Graphical Abstract Image

In the present study, the design of the ligand sarcosyl-l-lysyl-l-lysine (Sar-Lys-Lys) was based on the structure of human serum albumin (HSA). Sar-Lys-Lys coordinated to copper via three nitrogens to form a distorted square planar geometry.

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