143697-08-9Relevant articles and documents
Preparation, structure, and amphoteric redox properties of p-phenylenediamine-type dyes fused with a chalcogenadiazole unit
Suzuki,Tsuji,Okubo,Okada,Obana,Fukushima,Miyashi,Yamashita
, p. 8954 - 8960 (2007/10/03)
4,7-Bis(dialkylamino)benzo[c][1,2,5]chalcogenadiazoles are a novel class of organic dyes that undergo reversible two-stage one-electron oxidation as well as one-electron reduction. They exhibit absorption maxima in the long-wavelength region, which are assigned as intramolecular charge transfer bands from the phenylenediamine moiety to the electron-accepting heterocycle. Their redox properties as well as molecular and crystal structures are affected by the alkyl substituents on the amino nitrogen and/or by the chalcogen atom (O, S, Se) in the heterocycle.
BENZIDINE TYPE ELECTRON DONORS FUSED WITH 1,2,5-CHALCOGENADIAZOLE UNITS
Suzuki, Takanori,Okubo, Tsuneyuki,Okada, Akihisa,Yamashita, Yoshiro,Miyashi, Tsutomu
, p. 395 - 406 (2007/10/02)
The title electron donors (1 and 2) were prepared from 4-bromo-7-dialkyl-aminobenzothiadiazole (3).They are electrochemically amphoteric, and the absorption maxima in the 500-550 nm region were assigned to the intramolecular charge-transfer (CT) bands.The X-ray analyses of 1b and 1b radical cation PF6- revealed that the twisted geometry of 1b became planar upon one-electron oxidation, and a coplanar "ribbon"-like network was formed by SN interactions in the crystal of 1b radical cation PF6-.