Optical devices for the detection of cyanide in water based on ethyl(hydroxyethyl)cellulose functionalized with perichromic dyes
作者:Leandro Guarezi Nandi、Celso Rodrigo Nicoleti、Vanderléia Gava Marini、Ismael Casagrande Bellettini、Silvano Rodrigo Valandro、Carla Cristina Schmitt Cavalheiro、Vanderlei Gageiro Machado
DOI:10.1016/j.carbpol.2016.11.039
日期:2017.2
Films of three polymers, based on ethyl(hydroxyethyl)cellulose functionalized with protonated perichromic dyes, were used for anion sensing. The polymer functionalized with protonated Brooker's merocyanine acts as a chromogenic/fluorogenic system for the selective detection of cyanide in water. An increase of >28 times was verified for the fluorescence lifetime of the sensing units in the polymer in
基于乙基(羟乙基)纤维素的质子化过色染料功能化的三种聚合物的膜用于阴离子感测。用质子化的布鲁克的花菁官能化的聚合物可作为生色/荧光系统,用于选择性检测水中的氰化物。与水中质子化的布鲁克·部花菁相比,聚合物中传感单元的荧光寿命增加了> 28倍。此外,对于聚合物中的感测单元,pKa值的增加得到了验证。数据表明,烃类聚合物链提供了足够的微环境,以保护传感单元免受大量水的侵害。另一种被亚氨基苯酚官能化的聚合物对氰化物的选择性也很高(检测限= 9.36×10-6molL-1,定量限= 3。12×10-5molL-1)。由于偶氮酚单元的发色单元的pKa值较低,因此用偶氮苯酚单元功能化的聚合物无法检测到氰化物。