Donor−σ−Acceptor Molecules Incorporating a Nonadecyl-Swallowtailed Perylenediimide Acceptor
摘要:
Donor-sigma-acceptor-lipid molecules were prepared by using perylenetetracarboxylic diimide as the acceptor, starting from perylenetetracarboxylic dianhydride. One imide nitrogen was attached to a "swallowtail" lipid (a long alkyl tail connected at midchain), which imparts enough solubility to make the system tractable and provides a lipophilic region suitable for promoting Langmuir-Blodgett monolayer formation. The other imide link was to a donor group (pyrene, ferrocene, tetramethylphenylenediamine, phenyl) through a short alkyl sigma bridge. Features of the H-1 and C-13 NMR spectra of swallowtailed perylenediimides are interpreted as resulting from restricted rotation about the imide C-N bond; the C-13 NMR spectra and stereochemistry of these molecules are contrasted with the case of the related bis-(2,5-di-tert-butylphenyl)perylenetetracarboxylic diimide.
Donor−σ−Acceptor Molecules Incorporating a Nonadecyl-Swallowtailed Perylenediimide Acceptor
摘要:
Donor-sigma-acceptor-lipid molecules were prepared by using perylenetetracarboxylic diimide as the acceptor, starting from perylenetetracarboxylic dianhydride. One imide nitrogen was attached to a "swallowtail" lipid (a long alkyl tail connected at midchain), which imparts enough solubility to make the system tractable and provides a lipophilic region suitable for promoting Langmuir-Blodgett monolayer formation. The other imide link was to a donor group (pyrene, ferrocene, tetramethylphenylenediamine, phenyl) through a short alkyl sigma bridge. Features of the H-1 and C-13 NMR spectra of swallowtailed perylenediimides are interpreted as resulting from restricted rotation about the imide C-N bond; the C-13 NMR spectra and stereochemistry of these molecules are contrasted with the case of the related bis-(2,5-di-tert-butylphenyl)perylenetetracarboxylic diimide.
Magnetic Properties of CT Complexes between 2,2″,5,5″-Tetrakis(dimethylamino)terphenyls and TCNQF<sub>4</sub>
作者:Yosuke Nakamura、Hiizu Iwamura
DOI:10.1246/bcsj.66.3724
日期:1993.12
2,2″,5,5″-Tetrakis(dimethylamino)-p- and m-terphenyls (1 and 2), in which two N,N,N′,N′-tetramethyl-p-phenylenediamine (TMPD) moieties are linked through p- and m-phenylene units, respectively, were synthesized, and their CT complexes with TCNQF4 were prepared. In the complexes, 1 and 2 possess two S = 1/2 spins per molecule. The intramolecular interaction between the spins of the two TMPD moieties was found to be antiferromagnetic (2J/k = −42 K) in 1, and ferromagnetic (2J/k = 240 K) in 2.
Photochromism of a diarylethene charge-transfer complex: photochemical control of intermolecular charge-transfer interaction
作者:Masakazu Morimoto、Seiya Kobatake、Masahiro Irie
DOI:10.1039/b604388g
日期:——
A diarylethene derivative bearing a phenylenediamine group formed radical ions with an electron acceptor molecule in solution, and the concentration of the radical ions was modulated by the photochromic reaction of the diarylethene, reflecting the difference in the electron-donating character between the open- and closed-ring isomers.