Alarcon, S H and Olivieri, A C and Nordon, A and Harris, R K (1996) Solid-state electronic absorption, fluorescence and C-13 CPMAS NMR spectroscopic study of thermo- and photo-chromic aromatic Schiff bases. Journal of the Chemical Society, Perkin Transactions 2 (11). pp. 2293-2296. ISSN 1472-779X
Full text not available in this repository. (Request a copy from the Strathclyde author)Abstract
Solid-state electronic absorption, fluorescence emission and C-13 CPMAS spectroscopies have been applied to a series of aromatic Schiff bases displaying both ground and excited state intramolecular proton transfer phenomena. All the results can be explained on the basis of a thermal equilibrium between enolimine and keto-enamine tautomeric forms in the crystalline state. Most of the studied compounds are thermochromic. However, a few are photochromic. The carbon-13 NMR data in the solid state show, in general, residual (C-13,N-14) dipolar coupling effects. In certain cases, however, where fast proton transfer occurs in the ground state, these effects are shown to be self-decoupled.
| Item type: | Article |
|---|---|
| ID code: | 34646 |
| Keywords: | intramolecular proton-transfer, tautomerism, optical properties , crystals, anils, N hydrogen-bonded centrosymmetric dimers, Chemistry |
| Subjects: | Science > Chemistry |
| Department: | Faculty of Science > Pure and Applied Chemistry |
| Related URLs: | |
| Depositing user: | Pure Administrator |
| Date Deposited: | 21 Oct 2011 10:33 |
| Last modified: | 04 Oct 2012 13:59 |
| URI: | http://strathprints.strath.ac.uk/id/eprint/34646 |
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