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

Matthew N. Roberts†, Carl-Johan Carling‡, Jeffrey K. Nagle§, Neil R. Branda‡ and Michael O. Wolf†
Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada, 4D LABS, Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada, and Department of Chemistry, Bowdoin College, Brunswick, Maine 04011
J. Am. Chem. Soc., 2009, 131 (46), pp 16644–16645
DOI: 10.1021/ja907434x
Publication Date (Web): October 30, 2009
Copyright © 2009 American Chemical Society
mwolf@chem.ubc.ca; nbranda@sfu.ca., †

University of British Columbia.

, ‡

Simon Fraser University.

, §

Bowdoin College.

Abstract

Abstract Image

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.

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History

  • Published In Issue November 25, 2009
  • Article ASAPOctober 30, 2009
  • Received: September 02, 2009

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