An Investigation of Five Component [3+2] Self-Assembled Cage Formation Using Amidinium & #xb7; & #xb7; & #xb7;Carboxylate Hydrogen Bonds
Chriso M. Thomas, Émer M. Foyle, Samuel E. Walker, Nicholas G. White
The formation of five component [3+2] nano-sized cages assembled using charge-assisted amidinium···carboxylate hydrogen bonds was investigated. Molecular modelling suggested the cages were geometrically feasible, and 1H and DOSY NMR data are consistent with the cages forming in the highly polar solvent DMSO. (Source: Australian Journal of Chemistry)
Source: Australian Journal of Chemistry - July 5, 2021 Category: Chemistry Authors: Chriso M. Thomas & #xc9;mer M. Foyle Samuel E. Walker Nicholas G. White Source Type: research
Method Optimisation in Hydrophilic-Interaction Liquid Chromatography by Design of Experiments Combined with Quantitative Structure & #x2013;Retention Relationships
Maryam Taraji, Paul R. Haddad
A quality by design approach combined with quantitative structure–retention relationships and design of experiment principles is used to select the optimal conditions for maximum separation of a set of test analytes for a range of stationary phases in hydrophilic–interaction liquid chromatography. The accuracy of prediction of retention times was in the range 7.6–11.0 %. (Source: Australian Journal of Chemistry)
Source: Australian Journal of Chemistry - July 5, 2021 Category: Chemistry Authors: Maryam Taraji Paul R. Haddad Source Type: research
Micellar Catalysis and Reactivity in Nanostructured Ionic Liquids: Two Sides of the Same Coin?
Navjot K. Kahlon, Cameron C. Weber
Micelles can accelerate reactions by creating new reaction environments that increase the local concentration of reactants. Ionic liquids with amphiphilic nanostructures feature polar and non-polar domains akin to micellar solutions. This review discusses the interface between micellar solutions and ionic liquids as reaction media and highlights areas for future development. (Source: Australian Journal of Chemistry)
Source: Australian Journal of Chemistry - June 30, 2021 Category: Chemistry Authors: Navjot K. Kahlon Cameron C. Weber Source Type: research
Chiral Coordination Polymers of Mandelate and its Derivatives: Tuning Crystal Packing by Modulation of Hydrogen Bonding
Hui Min Tay, Carol Hua
(R)-Mandelic acid and its derivatives are useful ligands for the synthesis of chiral coordination polymers. Combining (R)-mandelic acid and 3,5-difluoromandelic acid with first row transition metals and dipyridyl co-ligands gives one-dimensional chains linked by hydrogen bonds into a densely packed structure. In contrast, the methoxy-protected analogue formed an open framework with solvent accessible channels. (Source: Australian Journal of Chemistry)
Source: Australian Journal of Chemistry - June 28, 2021 Category: Chemistry Authors: Hui Min Tay Carol Hua Source Type: research
Stability, Structure, and Permeability Studies of Copper Tripeptide Species in Aqueous Solution
Ahmed N. Hammouda, Fatin M. Elmagbari, Graham E. Jackson, Giselle M. Vicatos, Raffaele P. Bonomo, Gabriele Valora
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. (Source: Australian Journal of Chemistry)
Source: Australian Journal of Chemistry - June 22, 2021 Category: Chemistry Authors: Ahmed N. Hammouda Fatin M. Elmagbari Graham E. Jackson Giselle M. Vicatos Raffaele P. Bonomo Gabriele Valora Source Type: research
Fluorescent Reporters for Antimicrobial Peptides
Yuning Hong, Wenyi Li
This paper is a brief guide of commonly available fluorescent labelling methodologies to study the mechanisms of antimicrobial peptides (AMPs). (Source: Australian Journal of Chemistry)
Source: Australian Journal of Chemistry - June 16, 2021 Category: Chemistry Authors: Yuning Hong Wenyi Li Source Type: research
Reversible Fluorescence Switching of Donor & #x2013;Acceptor Type Bipyridines by Simple Protonation & #x2013;Deprotonation Equilibria
Shaik Mubeena, Meghana N, Gayatri Annapareddy, Yi-Sheng Chen, Monima Sarma, Ken-Tsung Wong
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. (Source: Australian Journal of Chemistry)
Source: Australian Journal of Chemistry - June 16, 2021 Category: Chemistry Authors: Shaik Mubeena Meghana N Gayatri Annapareddy Yi-Sheng Chen Monima Sarma Ken-Tsung Wong Source Type: research
A New Strategy Using a Fluorescent Probe Combined with Polydopamine for Detecting the Activity of Acetylcholinesterase
Yingying Chen, Wenxia Liu, Binbin Zhang, Zhiguang Suo, Feifei Xing, Lingyan Feng
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. (Source: Australian Journal of Chemistry)
Source: Australian Journal of Chemistry - June 11, 2021 Category: Chemistry Authors: Yingying Chen Wenxia Liu Binbin Zhang Zhiguang Suo Feifei Xing Lingyan Feng Source Type: research
Aligned Carbon Nanotube Films for Immobilization of Glucose Oxidase and its Application in Glucose Biosensor
Chunbo Jiang, Lianxi Zheng, Yang Liu
A new strategy was developed to immobilize glucose oxidase (GOx) between aligned carbon nanotube films, which achieved direct electron transfer of GOx for the electrocatalytic determination of glucose under mediator-free physiological conditions. (Source: Australian Journal of Chemistry)
Source: Australian Journal of Chemistry - June 10, 2021 Category: Chemistry Authors: Chunbo Jiang Lianxi Zheng Yang Liu Source Type: research
Effect 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, Yifan He, Hong Meng, Yinmao Dong, Zhaohui Qu, Youting Liu, Shouhong Xu, Honglai Liu
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. (Source: Australian Journal of Chemistry)
Source: Australian Journal of Chemistry - June 7, 2021 Category: Chemistry Authors: Xiangrong Huang Zhicheng Ye Yazhuo Shang Yifan He Hong Meng Yinmao Dong Zhaohui Qu Youting Liu Shouhong Xu Honglai Liu Source Type: research
Aptamer-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, Xiaojun Hu
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. (Source: Australian Journal of Chemistry)
Source: Australian Journal of Chemistry - June 1, 2021 Category: Chemistry Authors: Haibo Xing Xuelian Fei Bowen Zheng Xiyin Zheng Xu Dang Hongbo Zhang Fuxiang Tian Xiang Mei Xiaojun Hu Source Type: research
The pK a of Pentazole (HN 5 )
Sanjeev Rachuru, Jagannadham Vandanapu, Adam A. Skelton
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. (Source: Australian Journal of Chemistry)
Source: Australian Journal of Chemistry - May 28, 2021 Category: Chemistry Authors: Sanjeev Rachuru Jagannadham Vandanapu Adam A. Skelton Source Type: research
Imaging Cannabinoid Receptors: A Brief Collection of Covalent and Fluorescent Probes for CB 1 and CB 2 Receptors
Alexander J. Hamilton, Alan D. Payne, Mauro Mocerino, Hendra Gunosewoyo
A review of known molecular probes for imaging cannabinoid type 1 and type 2 receptors. Electrophilic, photoactivatable and fluorescent moieties are tagged to a range of established cannabinoids, ranging from the phytocannabinoids to the endocannabinoids and synthetic cannabimimetics. (Source: Australian Journal of Chemistry)
Source: Australian Journal of Chemistry - May 27, 2021 Category: Chemistry Authors: Alexander J. Hamilton Alan D. Payne Mauro Mocerino Hendra Gunosewoyo Source Type: research
Medicinal Cannabis & #x2013; The Green Fairy Phenomenon
Onyekachi Raymond, Mary Jane McCarthy, Jess Baker, Helen Poulsen
The lack of access to affordable and legally available medicinal cannabis products in New Zealand has driven the development of an active illegal market by a well intentioned network of so called ‘Green Fairies’. While indicated for a range of complaints and diseases, the lack of quality control on these products creates safety concerns that we have investigated and reported. (Source: Australian Journal of Chemistry)
Source: Australian Journal of Chemistry - May 26, 2021 Category: Chemistry Authors: Onyekachi Raymond Mary Jane McCarthy Jess Baker Helen Poulsen Source Type: research
Untargeted Metabolomic Analyses Reveal Chemical Complexity of Dioecious Cannabis Flowers
Matthew T. Welling, Myrna A. Deseo, Antony Bacic, Monika S. Doblin
Metabolic variation between male and female unisexual flowers of the plant genus Cannabis was examined by liquid chromatography–high-resolution mass spectrometry. In addition to variation in phytocannabinoid concentration, untargeted metabolic analyses revealed several differentially abundant metabolites associated with sexual phenotype. (Source: Australian Journal of Chemistry)
Source: Australian Journal of Chemistry - May 21, 2021 Category: Chemistry Authors: Matthew T. Welling Myrna A. Deseo Antony Bacic Monika S. Doblin Source Type: research
