Reversible Color Switching of an Organic Crystal Induced by Organic Solvent Vapors

被引：35

作者：

Fujii, Kotaro ^{[1
]}

Sakon, Aya ^{[1
]}

Sekine, Akiko ^{[1
]}

Uekusa, Hidehiro ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Chem & Mat Sci, Meguro Ku, Tokyo 1528551, Japan

来源：

CRYSTAL GROWTH & DESIGN | 2011年 / 11卷 / 10期

关键词：

SOLID-STATE; SALICYLIDENEANILINES; PHOTOCHROMISM; NORFLOXACIN; DIHYDRATE; ACID;

D O I：

10.1021/cg2010437

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

5-Aminoisophthalic acid (AIPA) was found to undergo reversible color change on exposure to solvent vapors, which is called vapochromism, via pseudopolymorphic transformations between the pale-pink hemihydrate and the yellow anhydrous crystals. By exposing methanol, ethanol, or acetonitrile vapor on the hemihydrate crystal, the hemihydrate crystal transformed into a novel anhydrous crystal and the anhydrous crystal returned into the hemihydrate crystal under the existence of water vapor. X-ray structural analysis revealed that the AIPA molecule is in a zwitterionic form in the hemihydrate crystal whereas it is in a nonionic form in the anhydrous phase. Theoretical calculations revealed that the isomerization between nonionic and zwitterionic forms causes a solid-state color difference.

引用

收藏

页码：4305 / 4308

页数：4

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