Successful Bifunctional Photoswitching and Electronic Communication of Two Platinum(II) Acetylide Bridged Dithienylethenes

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• 作者：Matthew N. Roberts ; Carl-Johan Carling ; Jeffrey K. Nagle ; Neil R. Branda ; Michael O. Wolf
• 刊名：Journal of the American Chemical Society
• 出版年：2009
• 出版时间：November 25, 2009
• 年：2009
• 卷：131
• 期：46
• 页码：16644-16645
• 全文大小：155K
• 年卷期：v.131,no.46(November 25, 2009)
• ISSN：1520-5126

文摘

Coordinating two dithienylethenes to a platinum center results in the reversible ring closure of both photochromic units in a model for a photoresponsive π-conjugated polymer. This system demonstrates how metal-sensitized photochemistry, from a triplet excited state, circumvents the problems associated with other multicomponent photochromic systems, where significant electronic interactions in the ground state and singlet excited state prevent full photoswitching. Changes in charge-transfer behavior based upon conversion of both dithienylethenes to their ring-closed forms illustrate how photomodulation of conductivity through a conjugated polymer might be achieved using Pt-bis(acetylide)s.