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Donor, acceptor, and self-quenching of the giant-dipole state of a rigid, σ-bond separated, donor-acceptor molecular assembly

✍ Scribed by John M. Warman; Matthijs P. De Haas; H. Oevering; J.W. Verhoeven; M.N. Paddon-Row; A.M. Oliver; N.S. Hush

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 535 KB
Volume: 128
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(86)80153-1

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✦ Synopsis

Photoexcitation of a molecular assembly consisting of the donor and acceptor moieties dimethoxynaphthalene and dicyanoethylene rigidly separated by an approximately 15 A long, saturated hydrocarbon bridge results in a charge-separated state with a dipole moment of 77 D and a lifetime of 740 ns in benzene. This giant dipole state is discharged by ground-state molecules and by the individual donor and acceptor moieties with close to diffusion-controlled rate constants.

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In a mixed assembly… … of bis-amide-functionalized dialkoxynaphthalene donor and naphthalenediimide acceptor, when there was a mismatch in the relative distance of the amide groups with respect to the two chromophores, self-sorting was observed. On the other hand if the two distances almost matched,