Rational design of piperidine functionalized boron-dipyrromethene as fluorescent chromoionophore for ion-selective optodes

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• 作者：Yu LiAuthor Vitae ; Yanmei XuAuthor Vitae ; Jing WuAuthor Vitae ; Yu Qin ; ^{qinyu01@gmail.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Dechen Jiang ; ^{dechenjiang@nju.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：Cation selective optode ; Fluorescence enhancement ; NHBDP ; Pb2+ detection ; Ion-exchange sensing mechanism
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：232
• 期：Complete
• 页码：37-42
• 全文大小：705 K

文摘

Piperidine functionalized boron–dipyrromethene (BODIPY) derivative was developed as the first phenylamino BODIPY type of pH indicators exhibiting fluorescence enhancement in the process of the deprotonation. The piperidine units on BODIPY core not only provided the excitation and emission at visible wavelength, but also changed the energy level of excited fluorophore inducing an oxidative PET process upon deprotonation. The probe was further applied to prepare fluorescence turn-on cation selective optodes based on ion-exchange sensing mechanism, which revealed fluorescence enhancement in the presence of target metal ion. For the model ion, Pb²⁺, the proposed sensor exhibited the linear response to Pb²⁺ in the range of 10⁻⁵–10⁻¹ M with the detection limit of 10⁻⁶ M. The excellent sensitivity and selectivity of Pb²⁺ optode suggested that the new fluorescent chromoionophore was compatible and fully functional in ionophore-based polymeric optode.