Patent · US Active

Method for photocatalytic isomerization of 1,2-diphenylethylene analogues

US7939703B2 · kind B2 · utility

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8Claims

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Assignee

Technical institute of physics and chemistry of the chinese academy of sciences · CN

Inventors

Li-Zhu Wu · Beijing, CN
Ming Peng · Manchester, US
Li Zhou · Tangxia, CN
Deng-Hui Wang · Beijing, CN

Key dates

Filing date	Dec 3, 2008
Grant date	May 10, 2011
Priority date	—
Expiry date	Dec 4, 2029

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C2531/22
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present invention relates to methods for accelerating the trans-cis isomerization of 1,2-diphenylethylene analogues by using photocatalyst. According to this invention, in the presence of polypyridyl platinum(II) complex with catalytic dosage, a solution containing trans-1,2-diphenylethylene analogues or mixture of cis- and trans-1,2-diphenylethylene analogues is irradiated by visible light to prepare product of cis-1,2-diphenylethylene analogues or product predominantly being cis-1,2-diphenylethylene analogues under inert gas atmosphere. This method has the advantages of fast reaction, high performance, easy separation of reaction system and recycle of the polypyridyl platinum (II) complexes.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.