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 8 2016

CH16030Co-Condensation Assisted Preparation of MoVI Schiff Base Modified Mesoporous Silica Catalyst for Enhanced Epoxidation of Olefins

Jian Zhang, Pingping Jiang, Yirui Shen, Guohu Zhao, Weijie Zhang and Gang Bian
pp. 817-825
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An organic–inorganic catalyst was prepared by the reaction of p-salicylidine aminobenzoic acid with mesoporous silica modified by 3-chloropropyl groups. This involved the hydrolysis and co-condensation of tetraethylorthosilicate and 3-chloropropyltrimethoxysilane and the introduction of MoO2(acac)2 into mesoporous silica functionalized with a Schiff base ligand. The heterogeneous catalyst showed good catalytic activities in the liquid-phase epoxidation of olefins.

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Four co-crystals have been obtained from the reaction of fenbufen and different N-heterocycles by grinding method or solution evaporation. Structural analyses indicate that the conformations of Fbf molecules are highly related to the lone pair···π, C–H···π, or C–H···O interactions, which lead to the formation of diverse supramolecular patterns.

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Six new 2D ZnII/CdII coordination polymers have been synthesized via hydrothermal or solvothermal reaction. The photoluminescence properties and photocatalytic activities of the title complexes have been studied.

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A novel self-assembled hierarchical catalyst, FA-Z30, is prepared and applied to FCC diesel hydrodesulfurization. Average conversion rates per unit volume of HDS, HDN, and HDArs are higher due to the continuous and interconnected porous structure (54% of total pore volume in the range 30–60 nm) and increased sulfidity at 75 %.

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A convenient method is devised to eliminate most of the irreproducibility observed in microwave-heated organic transformations. This approach was applied in the investigation of microwave effects in a reaction of 2-chloropyridine. The observed differences in reaction rates were traced back to thermal differences, while non-thermal effects could not be detected.

CH16101Capto-Dative Stabilization by Thermal Oxidation of 2-Oxo-1,2,3,4-tetrahydropyrimidines

Hamid R. Memarian, Esmael Sanchooli, Hadi Amiri Rudbari and Giuseppe Bruno
pp. 872-880
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The steric and electronic effects of aryl substitution on the oxidation of various 4,6-diaryl-2-oxo-1,2,3,4-tetrahydropyrimidines were investigated. A capto-dative stabilized radical intermediate involved in the reaction governs the type of product formed.

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The non-doped electroluminescent device with the configuration ITO/PEDOT : PSS/Ir-complex/TPBI/Ba/Al using cationic iridium complex as emissive layer emits orange light (λmax = 594 nm) with an external quantum efficiency of 5.6 %, a luminance efficiency of 9.3 cd A–1, and a power efficiency of 3 lm W–1.

CH16046Preparation and Characterization of Copper(II) and Nickel(II) Complexes with N-Benzyliminodiacetamide Derivatives

Neven Smrečki, Vladimir Stilinović, Maja Merkaš, Andrea Lučić, Boris-Marko Kukovec and Zora Popović
pp. 896-904
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Copper(ii) and nickel(ii) complexes with N-benzyliminodiacetamide derivatives, RN(CH2CONH2)2 (R= ortho-methylbenzyl, meta-methylbenzyl, para-methylbenzyl, ortho-chlorobenzyl, meta-chlorobenzyl, para-chlorobenzyl, para-fluorobenzyl, and para-bromobenzyl), were prepared and characterized by infrared spectroscopy and thermal analysis (thermogravimetric and differential thermal analyses). N-Benzyliminodiacetamide derivatives form stable complexes with copper(ii) and nickel(ii), but not with cobalt(ii), under the experimental conditions described in this paper. The X-ray structural analysis revealed octahedral coordination of nickel(ii) and copper(ii) ions in these complexes.

CH16006Anticancer Evaluation of Tris(triazolyl)triazine Derivatives Generated via Click Chemistry

Tamer El Malah, Hany F. Nour, A. A. Nayl, R. A. Elkhashab, Farouk M. E. Abdel-Megeid and Mamdouh M. Ali
pp. 905-910
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Click chemistry has been utilised for the preparation of seven new dendrimers. The anticancer potential of the new compounds was evaluated against various human cancer cell lines. The results revealed the high anticancer potential of compound G1a with no toxicity on normal cells in comparison with the standard drug doxorubicin.

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Receptor L proved to be a colorimetric fluoride (F), dihydrogen phosphate (H2PO4), and aluminium(iii) sensor. This new chromogenic receptor shows selective coloration for the above ions. The sensor showed a colour change upon addition of fluoride, dihydrogen phosphate, or aluminium(iii) ions.

CH15496Photoinitiated Synthesis of Sulfides in Water

Sergio A. Rodriguez, Leandro D. Mena and Maria T. Baumgartner
pp. 919-924
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This paper reports a synthetic route to obtain aryl sulfides using inexpensive and non-toxic reactants and water as solvent, that avoids the use of catalysts or heating. The photoinduced reaction between soluble substrates and a series of thiols in alkaline aqueous medium produces the corresponding sulfides in moderate to good yields.

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Investigation on the phytochemistry of flowers of the Australian species ‘Illawarra flame tree’ (Brachychiton acerifolius) and the endemic Alstonville (Tibouchina lepidota) revealed the compounds responsible for the intense colour of the flowers. Additionally, known biological activities of the identified compounds from the former species correlated with their use in indigenous medicine.

CH16057Trimethylsilyl Isothiocyanate (TMSNCS)

Rosana Helena C. N. Freitas
pp. 928-929
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The versatility of trimethylsilyl isothiocyanate (TMSNCS) as a reagent is impressive, especially in heterocycle synthesis. TMSNCS is also commonly used in reactions of thiocyanation and isothiocyanation. The advantages of TMSNCS are moderated toxicity, chemical stability, high tolerance with other functional groups, and ease of handling. This paper highlights a selection of many different and recently reported types of reactions that this reagent is able to promote.

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