ANTHRALIN-DERIVED TRANSIENTS–I. THE TRIPLET STATE AND THE PRODUCTS OF ITS REACTION WITH OXYGEN IN BENZENE
- 1 April 1989
- journal article
- research article
- Published by Wiley in Photochemistry and Photobiology
- Vol. 49 (4) , 439-445
- https://doi.org/10.1111/j.1751-1097.1989.tb09192.x
Abstract
— Direct laser excitation in benzene of l,8‐dihydroxy‐9‐anthrone (anthralin) does not lead to transient species with lifetimes in the nanosecond time regime or longer. The triplet state has been produced in benzene by pulse radiolysis and characterised in terms of its absorption spectrum (Λmax 560 nm), natural lifetime (11 γ.s), self‐quenching properties (Ksq= 2.6 × 107 l mol‐1 s‐1) and triplet energy (234 kJ mol‐1). There is no tendency in the non‐polar medium for production of either the triplet or ground state in a tautomeric form. The observed triplet state reacts with oxygen with a typical rate constant, 2.2 × 109 l mol‐1 s‐1. The products of this reaction are singlet oxygen (∼64%) and the anthralin radical (∼14%).This publication has 39 references indexed in Scilit:
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