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- Bielawski, Christopher W.
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Photoswitchable N-Heterocyclic Carbenes: Using Light to Modulate Electron-Donating Properties
- Issued Date
- 2011-10
- Citation
- ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, v.50, no.44, pp.10322 - 10326
- Abstract
- Ligands in the limelight : Light was used to change the electron‐donating properties of an N‐heterocyclic carbene (NHC) moiety within chalcogen and metal adducts. Photoinduced electrocyclic ring closure of a photochromic 4,5‐dithienylimidazolone increased its νCO frequency. Likewise, UV irradiation of an analogous photochromic [(NHC)Ir(CO)2Cl] complex decreased the carbene's electron‐donating ability. Subsequent exposure to visible light reversed both photocyclization reactions.
- Publisher
- WILEY-V C H VERLAG GMBH
- ISSN
- 1433-7851
- Keyword (Author)
- carbenes, cyclization, nitrogen heterocycles, photochromism, photoswitch
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