Palit, Dipak K. ; Pal, Haridas ; Mukherjee, Tulsi ; Mittal, Jai P. (1990) Triplet excited states and semiquinone radicals of 1,4-disubstituted anthraquinones Journal of Photochemistry and Photobiology A: Chemistry, 52 (3). pp. 375-390. ISSN 1010-6030
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/101060...
Related URL: http://dx.doi.org/10.1016/1010-6030(90)85017-Q
Abstract
The triplet state properties of 1,4-dihydroxy-9,10-anthraquinone (quinizarin, QNZ), 1-amino-4-hydroxy-9,10-anthraquinone (AHAQ) and 1,4-diamino-9,10-anthraquinone (DAAQ) were investigated in cyclohexane and isopropanol solutions using nanosecond laser flash photolysis. T---T absorption maxima, extinction coefficients, triplet quantum yields and kinetic parameters were measured. The corresponding properties of the neutral semiquinone radicals were also determined in isopropanol. Pulse radiolysis data were used to supplement the measurements. The possibility of dimerization in solution and its effect on the photophysics of the triplet state are discussed for these quinones.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 25635 |
| Deposited On: | 04 Dec 2010 12:02 |
| Last Modified: | 12 Jul 2012 04:34 |
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