Australian Journal of Chemistry
Volume 75
Number 3 2022
The interactions between four cryoprotectants and monolayers of four phospholipids were investigated. Significant differences are observed as functions of cryoprotectant, lipid species and physical state of the monolayer, highlighting that results based on a single model system are insufficient to understand the mechanisms of action of cryoprotectants.
Charge-transfer (CT) complexes formed between Ar-S-TTFs and TCNQF4 are investigated. It is found that the complexes show different degrees of charge transfer and the stacking structures of the CT complexes can be manipulated by varying the symmetry and size of the aryl groups on the Ar-S-TTF.
The nucleophilic ability of substituted 5-aminopyrazoles and the type of acyclic and cyclic dicarbonyl component were investigated in the cyclocondensation reaction to synthesise various pyrazolodihydropyridines and pyrazolodihydropyrimidines. The type of the substituent in the 5-aminopyrazole molecule affects the regiochemistry of addition.
Nitrogen-doped modified activated carbons (NACs) were prepared from coconut shell, date shell, and almond shell using the urea modification method. NO tests of NH3 selective catalytic reduction (NH3-SCR) were conducted to evaluate the efficiency of different types of nitrogen-doped modified AC as denitration catalyst carriers at 50–220°C. NACs denitrification activity tests were carried out in a fixed-bed reactor with an inner diameter of 15 mm and a total gas flow rate of 500 mL·min−1 flue gas.
Solvatochromic behaviour of triazine substituted dyes was evaluated mathematically based on red shift index (RsI) and solvation energy (ASE). This study demonstrates that substituent changes and solvent nature induce spectral changes. These phase changes were characterised by evaluating the wavelength of the absorption and emission spectra in different solvents. This concept can be used for any type of dye that displays solvatochromic behaviours in a wide range of solvents.
The kinetics of liquid drop evaporation from glass surfaces was evaluated. Differential evaporation rates were compared between Au coated and bare glass surfaces. The contact angle was used to quantify the diameter of the water drop as a measure of evaporation rate. Potential applications in the control of silica-microwires have been discussed.
Three new complexes based on 2,5-dihydroxyterephthalic acid (H2DHTA), namely, {[Ln(DHTA)1.5(H2O)3]·H2O}n (Ln = La 1, Ce 2, Nd 3), have been successfully synthesised under hydrothermal conditions. Structural analysis revealed that 1–3 are isostructural and all display a one-dimensional structure along the a axis and a two-dimensional network along the b axis, which was stabilised by O–H⋯O hydrogen bonding and π–π interactions.
