کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
740063 1462097 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A new highly selective and turn-on fluorescence probe for detection of cyanide
ترجمه فارسی عنوان
یک پروب جدید فلورسانس بسیار انتخابی و روشن برای تشخیص سیانید
کلمات کلیدی
سیانید، نولوفیلیک، پروب فلورسنت، حساسیتی، به طور انتخابی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• A new and high selective turn on fluorescence sensor for CN− was developed.
• The mechanism is based on nucleophilic addition reaction of cyanide anion.
• The detection limit was found to be 45 nmol/L.

A new compound was conveniently synthesized via the condensation of 2-hydroxy-1,3,5-benzenetricarbaldehyde (1) with 1-methyl-2,3,3-trimethyl-3H-indolium (2) in ethanol. Its recognition ability was firstly carried out in DMSO. After addition of all kinds of anions, only CN− can induce a turn on fluorescence accompanying a blue-green fluorescence color. The mechanism is based on nucleophilic addition reaction of cyanide anion with the polarized CN bond of the indolium group blocking the π-conjugation between indolium and 2-hydroxy-1,3,5-benzenetricarbaldehyde, which was proved by H NMR and ESI-MS. In addition, the detection was completed with 2 min and the detection limit was found to be 45 nmol/L.

The nucleophilic nature of cyanide is used to develop a simple, sensitive, and highly effective sensor. So we developed a new fluorescence probe for cyanide-based 1-methyl-2,3,3-trimethyl-3H-indolium and 2-hydroxy-1,3,5-benzenetricarbaldehyde. Among the tested anions, only CN− could turn on the fluorescence intensity suggesting that the system was a highly selective sensor for CN−. The concentration of the cyanide anions that could be detected was as low as 45 nmol/L.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 193, 31 March 2014, Pages 220–224
نویسندگان
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