抄録
Benzo[1, 2, 3-kl : 4, 5, 6-k′l′]dixanthene having amino, methyl, and nitro group was synthesized from 1, 5-dichloroanthraquinone in four steps. After quaternization with iodo- alkane, photochromic properties of monolayers on water surface and LB films on quartz glass were investigated.