T. Michinobu, E. Tsuchida, H. Nishide
Apr 15, 2000
Citations
0
Influential Citations
15
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
3,4′-Bis[bis(p-t-butylphenyl)amino]stilbene 1a and 3,4′-bis[bis(p-methoxyphenyl)amino]stilbene 1b were synthesized. The oxidation of 1 was analyzed by electrochemical measurements, which revealed the reversible formation of the bis(cation radical) 2 via a two-electron transfer reaction. The chemical oxidation of 1 with NOBF4 also gave the bis(cation radical) 2; UV/vis and ESR spectroscopies supported aminium radical formation without any side reaction. Magnetization, magnetic susceptibility, and the ESR ΔMs = ±2 signal of the biradicals indicated triplet ground states with a large triplet-singlet energy gap.