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

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 associa...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2009-11, Vol.131 (46), p.16644-16645
Main Authors: Roberts, Matthew N, Carling, Carl-Johan, Nagle, Jeffrey K, Branda, Neil R, Wolf, Michael O
Format: Article
Language:English
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Summary: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.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja907434x