Photoswitchable Luminescence of Rhenium(I) Tricarbonyl Diimines
Abstract
The synthesis, characterization, and X-ray crystal structures of [Re(diimine)(CO)_3(dpe)](PF_6) (dpe = 1,2-di(4-pyridyl)ethylene) compounds are reported. The cis-dpe complexes exhibit yellow luminescence after UV excitation, whereas the trans-dpe counterparts are nonluminescent. The luminescence quantum yields of the cis-dpe complexes are strongly dependent on the identity of the diimine ligand. Irradiation (350 nm) of the trans-dpe complexes induces trans → cis dpe-ligand isomerization with quantum yields on the order of 0.2, and this process leads to an on-switching of yellow luminescence. After long 350-nm irradiation times, a steady state composed of roughly 70% cis- and 30% trans-dpe complexes is reached. The reverse cis → trans photoisomerization reaction is induced by irradiating the cis-dpe complexes at 250 nm, switching off the yellow luminescence. For 250-nm excitation, photodecomposition of the [Re(diimine)(CO)_3(dpe)]^+ complexes competes efficiently with photoisomerization.
Additional Information
© 2004 American Chemical Society. Received 17 November 2003. Published online 17 February 2004. Published in print 1 March 2004. This work was supported by the National Science Foundation. O.S.W. acknowledges a postdoctoral fellowship from the Swiss National Science Foundation.Attached Files
Supplemental Material - ic030324z_s.pdf
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Additional details
- Eprint ID
- 76907
- DOI
- 10.1021/ic030324zd
- Resolver ID
- CaltechAUTHORS:20170425-095907901
- NSF
- Swiss National Science Foundation (SNSF)
- Created
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2017-04-25Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field