4,7-Bis(dimethylamino)benzimidazoles and twin-type derivatives: reversible two-stage redox system modulated by proton-transfer

Autor:	Kimio Akiyama, Yoshiaki Obana, Kenshu Fujiwara, Tsutomu Miyashi, Takanori Suzuki, Takanori Fukushima, Hidetoshi Kawai, Mayu Saito, Yoshiaki Tsubata
Rok vydání:	2003
Předmět:	Proton Radical Organic Chemistry Electron donor Photochemistry Biochemistry Redox chemistry.chemical_compound chemistry Electrochromism Zwitterion Drug Discovery Polymer chemistry Response system Conjugate
Zdroj:	Tetrahedron Letters. 44:7881-7884
ISSN:	0040-4039
DOI:	10.1016/j.tetlet.2003.09.012
Popis:	The title electron donors 1 as well as their conjugate bases 2− undergo reversible two-stage one-electron oxidation. ESR analysis indicated the important contribution of zwitterionic structure for radicals 2 . Bis(zwitterionic) but not quinoid structure was suggested for p-4 , generated from the twin-type dianionic donor p-42− with a p-phenylene spacer.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c382a677f2e418e0b72276eff4d35df7 https://doi.org/10.1016/j.tetlet.2003.09.012 Zobrazit plný text záznamu Full Text from ScienceDirect