Excited state properties of bis(trimethylsilyl)acetylenecopper(I) hexafluoroacetylacetonate. Emission and photodissociation induced by metal-to-ligand charge transfer excitation

Kunkely, Horst and Vogler, Arnd (2003) Excited state properties of bis(trimethylsilyl)acetylenecopper(I) hexafluoroacetylacetonate. Emission and photodissociation induced by metal-to-ligand charge transfer excitation. INORGANIC CHEMISTRY COMMUNICATIONS, 6 (5). pp. 543-545. ISSN 1387-7003

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Abstract

The complex Cu-I(BTA)(hfac) with BTA = bis(trimethylsilyl)acetylene and hfac = 1,1,1,5,5,5-hexa-fluoroacetylacetonate shows a longest-wavelength absorption at at lambda(max) = 324 nm (epsilon = 5400 M-1 cm(-1)) which is assigned to a spin-allowed Cu-I --> pi (BTA) metal-to-ligand charge transfer (MLCT) transition. The solid complex displays an emission at lambda(max) = 601 nm which is assumed to originate from the lowest-energy MLCT triplet. In solution MLCT excitation leads to the release of the acetylene with 6 x 10(-4) at lambda(irr) = 333 nm. (C) 2003 Elsevier Science B.V. All rights reserved.

Item Type: Article
Uncontrolled Keywords: ALKYNE COMPLEXES; PHOTOCHEMICAL PROPERTIES; MOLECULAR DESIGN; COPPER; D10; electronic spectra; luminescence; charge transfer; photochemistry; copper complexes; acetylene complexes
Subjects: 500 Science > 540 Chemistry & allied sciences
Divisions: Chemistry and Pharmacy > Institut für Anorganische Chemie > Alumni or Retired Professors > Prof. Dr. Arnd Vogler
Depositing User: Dr. Gernot Deinzer
Date Deposited: 11 Aug 2021 06:25
Last Modified: 11 Aug 2021 06:25
URI: https://pred.uni-regensburg.de/id/eprint/39033

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