Journal of Fluorescence ( IF 2.7 ) Pub Date : 2021-06-18 , DOI: 10.1007/s10895-021-02766-5 Ambreen Abbasi 1 , Ifra Ilyas Ansari 1 , Mohammad Shakir 1
In this study, a simple Benzimidazole based bifunctional chemosensor 4-(2-(3,4-dimethoxyphenyl)-1H-benzo[d]imidazol-6-yl) benzene-1,2-diamine, L was synthesized and characterized. The sensor proved to be selective and sensitive towards detecting banned azo dyes Sudan Dye I, II, and Metanil Yellow via fluorescence turn-off response. The proposed mechanism of fluorescence quenching was the inner filter effect. LODs for Sudan I, II, and Metanil Yellow were found to be 0.009 µM, 0.012 µM, and 0.0073 µM, respectively. The developed chemosensor also showed a colorimetric response towards Cu (II) ions via an apparent color change from yellow to pink. LOD for Cu (II) ions was found to be 1.2 µM. The synthesized benzimidazole based bifunctional chemosensor was adequately tested to determine Sudan I in Red chili powder and red Food color samples, Metanil yellow in turmeric powder, and Cu(II) packaged coconut water.
中文翻译:
高选择性和高灵敏度苯并咪唑基双功能传感器,用于针对红辣椒、红色食用色素、姜黄粉和椰子水中的 Cu(Ii) 中的不可食用偶氮染料
在这项研究中,合成并表征了一种简单的基于苯并咪唑的双功能化学传感器 4-(2-(3,4-dimethoxyphenyl)-1H-benzo[d]imidazol-6-yl) benzo-1,2-diamine, L。该传感器被证明对通过荧光关闭响应检测禁用的偶氮染料苏丹染料 I、II 和 Metanil Yellow 具有选择性和敏感性。提出的荧光猝灭机制是内滤效应。苏丹 I、II 和 Metanil Yellow 的 LOD 分别为 0.009 µM、0.012 µM 和 0.0073 µM。开发的化学传感器还通过从黄色到粉红色的明显颜色变化显示出对 Cu (II) 离子的比色响应。发现 Cu (II) 离子的 LOD 为 1.2 µM。对合成的基于苯并咪唑的双功能化学传感器进行了充分测试,以测定红辣椒粉和红色食用色素样品中的苏丹 I,