title: Synthesis of viologens with extended pi-conjugation and their photochromic behavior on near-IR absorption
authors.affiliation: Department of Applied Chemistry and Biotechnology, Yamanashi University, Takeda 4, Kofu 400-8511, Japan.
authors.initials: M
authors.lastname: Nanasawa
authors.initials: M
authors.lastname: Miwa
authors.initials: M
authors.lastname: Hirai
authors.initials: T
authors.lastname: Kuwabara