Miki Sadao, Kagawa Hiroyuki, Matsuo Kohji, Kobayashi Osamu, Yoshida Masah+, Tetrahedron, 48 (1992) N 9, S 1567-1572
作者:Miki Sadao, Kagawa Hiroyuki, Matsuo Kohji, Kobayashi Osamu, Yoshida Masah+
DOI:——
日期:——
Novel napthacenequinone derivatives undergoing photovalence isomerization: a new photochromic molecule
作者:Sadao Miki、Hiroyuki Kagawa、Kohji Matsuo、Osamu Kobayashi、Masahiro Yoshida、Zen-ichi Yoshida
DOI:10.1016/s0040-4020(01)88714-7
日期:1992.2
both 1 and 2 possess ππ* nature strongly. Correspondingly, upon irradiation, 1 and 2 undergo photovalence isomerization to give the valene isomer of 1 and the Dewar isomer of 2, respectively. The interconversions between the naphthacenequinones and their valenceisomers were reversible photochemically.
was synthesized. Upon thermolysis of 1 the formation of the detectable amount of naphthacene-quinovalene (3) was observed. Singlet excited state of 7,8,9-tri-t-butyl-5,12-naphthacenequinone produced via the thermal cycloreversion of 1 is responsible for the formation of 3