Photoinduced Electron Transfer of N-[(3- and 4-Diarylamino)phenyl]-1,8-Naphthalimide Dyads: Orbital-Orthogonal Approach in a Short-linked D−A System
The photoinduced electron transfer of a series of meta- and para-linked triphenylamine−naphthalimide dyads, N-{3- and 4-[bis(4-R-substituted phenyl)amino]phenyl}-1,8-naphthalimide, 1m,p (R = H), 2m,p (R = Me), 3m,p (R = OMe), and 4m,p (R = NMe2) was investigated in toluene and DMF. The singlet charg...
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Published in | The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Vol. 112; no. 12; pp. 2533 - 2542 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
American Chemical Society
27.03.2008
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Online Access | Get full text |
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Summary: | The photoinduced electron transfer of a series of meta- and para-linked triphenylamine−naphthalimide dyads, N-{3- and 4-[bis(4-R-substituted phenyl)amino]phenyl}-1,8-naphthalimide, 1m,p (R = H), 2m,p (R = Me), 3m,p (R = OMe), and 4m,p (R = NMe2) was investigated in toluene and DMF. The singlet charge-transfer (CT) states were observed in all cases. The decay rates were found to be faster in DMF (τ = 6.5 ps to 100 ps) than those in toluene (τ = 190 ps to 7 ns). The long-lived triplet CT states were observed in toluene for 3 (ca. 10% contribution, τ = 670 ns for 3m, 240 ns for 3p). No long-lived species were detected in DMF. The decay rates were somewhat faster in the para-isomers than in the meta-isomers in most cases. The photolysis of 5 (p-phenylene extended analogue of 3, R = OMe) gave a singlet CT state and a locally excited triplet state on the naphthalimide chromophore. |
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Bibliography: | ark:/67375/TPS-GC4K1D3T-1 istex:5E8EAFE98F1DB9E036ECC38A5B0218DD34A9CA50 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1089-5639 1520-5215 |
DOI: | 10.1021/jp710102h |