文章基本信息

标题：Preparao e Caracterizao de Merocianinas Derivadas de Espiropirano Ativadas por Foto/Ionocromismo
本地全文：下载
作者：Renata Flávia Ferraz do Nascimento ; Cicero Inacio da Silva Filho ; Arturo Gamonal Ruiz-Crespo 等
期刊名称：Research, Society and Development
电子版ISSN：2525-3409
出版年度：2022
卷号：11
期号：5
页码：1-11
DOI：10.33448/rsd-v11i5.28661
语种：English
出版社：Grupo de Pesquisa Metodologias em Ensino e Aprendizagem em Ciências
摘要：Spiropyrans are a sort of organic molecule, known for their unique photochromic properties that allow them to be used in several application areas. The irradiation with ultraviolet light induces a ring-opening reaction of the spiropyran structure, breaking a specific carbon-oxygen bond, which gives rise to the open form called merocyanine, making its reactivity easily detectable. The objective of this research was to carry out the synthesis, characterization and study of the isomerization of hydroxy-functional spiropyrans from the formation of new metal complexes. In this work, a spiropyran-like molecule was synthesized from the condensation reaction of methyleneinoline precursors and hydroxybenzaldehyde derivative. The structures were characterized by UV-Vis, Infrared and 1H NMR spectrometric techniques. The product, when exposed to UV light, was able to rearrange and break the C-O bond, producing the open form of merocyanine. Furthermore, the complexation of metal ions Ca2+, Fe2+ and Ni2+ with spiropyran in solution revealed interesting spectral changes, which are concentration dependent, forming the merocyanine structure. These results are interesting from the point of view of chemosensor applications for metal ions.
关键词：Photochromism;UV Light;Metal complexes.