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Hexadecylquinolinium tricyanoquinodimethanide, a unimolecular rectifier between 370 and 105 K and its spectroscopic properties

✍ Scribed by Robert M. Metzger

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 142 KB
Volume: 9
Category: Article
ISSN: 1616-301X
DOI: 10.1002/1099-0712(199911/12)9:6<253::aid-amo389>3.0.co;2-o

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✦ Synopsis

A single molecule, g-hexadecyl-quinolinium tricyanoquinomethanide, 1, whose ground state is zwitterionic: D + -p-A -, with dipole moment 4328 Debyes, and whose first excited state is undissociated: D 0 -p-A 0 , with an estimated moment between 3 and 9 Debyes, is a unimolecular rectifier of electrical current between 370 and 105 K. Spectroscopy data confirm this interpretation. The 1974 proposal by Aviram and Ratner for unimolecular rectification has been confirmed, but questions can still be formulated about experimental details.