Kunkely, Horst and Vogler, Arnd (2001) Photochemistry of N,N '-bis(3,5-di-tert-butylsalicylidene)-1,2-diaminocyclohexane and its Co(II) complex in chloroform. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 138 (1). pp. 51-54. ISSN 1010-6030
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N,N'-bis(3,5-di-tert-butylsalicylidene)-1,2-diaminocyclohexane (H2E) is photochromic. In CHCl3 it undergoes a phototautomerization (phi = 3 x 10(-4) at lambda (irr) = 333 nm) to its keto isomer H(2)Q which is thermally reconverted to the original enol form. The enol is not luminescent but the keto isomer shows a green fluorescence at lambda (max) = 505 nm with phi = 10(-2) at lambda (exc) = 410 nm. Accordingly, the photoreversible system does not only display a conventional photochromism but also a luminescence photochromism. The complex Co-II(E) in CHCl3 is also light sensitive. It is irreversibly photooxidized to Co(E)(+) with phi = 5 x 10(-3) at lambda (irr)=435 nm. The electron is not removed from the metal but from the ligand. (C) 2001 Elsevier Science B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SCHIFF-BASE COMPLEXES; ELECTRONIC-STRUCTURE; METAL-COMPLEXES; FLUORESCENCE; OXYGENATION; photochromism; luminescence photochromism; photooxidation; salen-type Schiff base; cobalt(II) |
| 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: | 01 Mar 2022 10:12 |
| Last Modified: | 01 Mar 2022 10:12 |
| URI: | https://pred.uni-regensburg.de/id/eprint/41898 |
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