کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
176516 458945 2012 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and photochromic properties of a dithiazolylindole
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Synthesis and photochromic properties of a dithiazolylindole
چکیده انگلیسی

A novel photochromic 2,3-dithiazolylindole has been synthesized and its photochromic properties was elucidated. This compound showed reversible photochromism both in solution and in a crystal with no spontaneous bleaching under dark conditions. The photocyclization quantum yield of the dithiazolylindole was as high as 83% in hexane, suggesting the photoreactive conformation was stabilized through intramolecular interactions. X-ray crystal structure analysis revealed that the dithiazolylindole adopted the photoreactive conformation with quasi-C2 symmetry around the hexatriene moiety in the crystalline state. This conformation was assisted by presumed intramolecular CH/N hydrogen bonding between the central N-methylindole and the side-chain thiazolyl units in combination with steric interactions between methyl groups at the reactive center carbons. The suggestion of intramolecular hydrogen bonding in solution was also supported by a 1H NMR variable temperature study.


► Highly sensitive photocoloration reaction of a new triangle terarylene, 2,3-dithiazolylindole.
► Intramolecular interactions control the molecular conformation and photoreactivity.
► X-ray crystallography and NMR study reveal intramolecular interactions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dyes and Pigments - Volume 92, Issue 2, February 2012, Pages 868–871
نویسندگان
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