A remarkable deuterium isotope effect on the photochromism of 3,3′-diaryl-3H,3′H-[2,2′]biindenylidene-1,1′-dione (2) in the solid state has been found. The yellow crystals of 2 and 2-d2 were immediately changed to reddish purple crystals upon photoirradiation in the solid state. The reddish purple crystals of 2-d2 returned back to the original yellow crystals under dark for 72 h, whereas that of 2 faded within 2 h.
研究发现,
氘同位素对固态 3,3′-二芳基-3H,3′H-[2,2′]双
茚基-1,1′-二酮(2)的光致变色作用有显著影响。2 和 2-d2 的黄色晶体在固态下经光照射后立即变为红紫色晶体。在黑暗条件下 72 小时,2-d2 的红紫色晶体又变回原来的黄色晶体,而 2 的红紫色晶体则在 2 小时内褪色。