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• 553-94-6 4-bromo-m-xylene 
• 54663-78-4 tributyl(thien-2-yl)stannane 
• 188290-36-0 thiophene 
• 132907-18-7 3,6-dimethoxy-3,6-dimethylcyclohexa-1,4-diene 

Relevant academic research and scientific papers

LUMINESCENT SOLAR CONCENTRATOR COMPRISING DITHIENYLPYRIDINETHIADIOAZOLE COMPOUNDS

Luminescent solar concentrator (LSC) having at least one dithienylpyridinethiadiazole compound having general formula (I) or (II): Said luminescent solar concentrator (LSC) can be advantageously used in the construction of photovoltaic devices (or solar d

How to build fully π-conjugated architectures with thienylene and phenylene fragments

A series of small-sized model π-conjugated oligomers have been prepared from thienylene and phenylene or dimethyl-or dimethoxy-substituted phenylene units. Crystallographic data for the methoxylated compound show a quasi-planar conformation with a non-covalent S-O interaction. The resulting strong conjugation in the gas phase has also been highlighted by UV/photoelectron spectroscopy and theoretical calculations (DFT). Indeed, for these compounds there is a large energy gap ΔEπ arising from the interaction between the molecular orbitals of the isolated thienylene-phenylene species. This can be explained in terms of the energies of the two π orbitals of the dimethoxyphenylene unit, the shape of these molecular orbitals in a three-orbital interaction diagram and by the presence of the S...O interaction which reduces the inter-ring angle between the two aromatic cycles. The nature of the sulfur-oxygen interaction, discussed from a theoretical point of view, is mainly electrostatic, the orbital contribution from the only correctly directed orbitals nOσ and σ*S-C being slightly stabilising. These results show extensive conjugation of the π system corroborated by a small HOMO-LUMO gap. These studies, carried out in the solid state and in the gas phase, show how important it is to combine thienylene and dialkoxyphenylene fragments to obtain oligomers with a strong electronic delocalisation. Thus, these compounds are of interest in the fields of electronic and optoelectronic devices. Wiley-VCH Verlag GmbH & Co. KGaA, 2007.

Reactivity of 3,6-dimethoxy-3,6-dimethylcyclohexa-1,4-diene (Part 2). Regioselective arylation of electron-rich aromatic compounds

The reaction of 3,6-dimethoxy-3,6-dimethylcyclohexa-1,4-diene (1) with electron-rich heterocycles (furan, thiophene, pyrrole, 2-methylfuran, indole) and 1,3,5-trimethoxybenzene in the presence of catalytic amounts of zinc dichloride or concentrated sulfur