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论文类型：期刊论文

发表时间：2019-10-01

发表刊物：DYES AND PIGMENTS

收录刊物：SCIE、EI

卷号：169

页面范围：105-110

ISSN号：0143-7208

关键字：Photochromism; Amorphous powder; Nanofiber; Schiff bases; Indole; Intermolecular proton transfer

摘要：A series of Schiff bases containing the indole group were synthesized. The compound 2-[(1-methyl-1H-indol-3-yl)methylene] hydrazinecarbothioamide (4) exhibits excellent reversible photochromic properties both in solid - solid state and solution. Moreover, the nanofiber containing the compound 4 also shows excellent photo chromic properties, which are better than the amorphous powder of 4 itself. Based on the experiment results and theoretical calculation, we confirm that the photochromic properties originate from the intermolecular proton transfer, resulting in the isomerization of the thioketone - form and the thioalcohol - form in the hydrazinecarbothioamide. This unique photochromic system is obviously different from that of traditional Schiff bases, such as salicylideneanilines.