Department of Chemistry, Faculty of Sciences, Kyushu University, 4-2-1 Ropponmatsu, Chuo-ku, Fukuoka 810-8560, Japan.
Org Biomol Chem. 2004 Feb 21;2(4):499-504. doi: 10.1039/b311669g. Epub 2004 Jan 21.
4,4[prime or minute]-Methylenebis(N-salicylidene-2,6-dialkylaniline) derivatives were prepared and their structures were determined by (1)H NMR, IR, DSC and X-ray crystallographic analyses. The 2,6-diisopropylaniline derivative yielded definite polymorphic crystals: the space groups of the crystals were C2/c and P2(1)/n, respectively. It was found that both polymorphs were similarly photochromic but the thermal stability of the photochrome was different due to the variance of the shape of molecule and cavity in each crystal.
4,4'-亚甲基双（N-水杨醛缩-2,6-二烷基苯胺）衍生物被制备，并通过（1）H NMR、IR、DSC 和 X 射线晶体学分析确定了它们的结构。2,6-二异丙基苯胺衍生物生成了确定的多晶型晶体：晶体的空间群分别为 C2/c 和 P2(1)/n。结果发现，两种多晶型物都具有相似的光致变色性，但由于每个晶体中分子和腔的形状变化，光致变色的热稳定性不同。
