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Mechanism of photoinduced anion formation of pyromellitic dianhydride in n-donor solvents

✍ Scribed by Yohji Achiba; Katsumi Kimura

Book ID
103010002
Publisher
Elsevier Science
Year
1973
Tongue
English
Weight
407 KB
Volume
19
Category
Article
ISSN
0009-2614

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✦ Synopsis

The following conclusions have been drawn from flash photolysis experiments of pyromellitic dimhydride (PMDA) in variois organic solvents at room temperature. (1) Short lived transients inititiy appearing in ether, dioxane, and tetrtiydrofuran solutions are attributable to the triplet excit& states of chuge_transFer (CT) compkxes formed between PMDA and these etherial solvents. (2j Long lived transients seconharily formed in the ethereal solvents are identified as the anion radical of PMDA, the anion formation taking place via the CT triplet state. (3) In acetonitrile solution, however, the anion formation occurs mainly through the excited singlet state of the m.

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