Cyanide and chloroform detection through J-aggregates based aggregation induced emission probe with real sample applications

IF 6.6 Q1 ENGINEERING, ENVIRONMENTAL
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Abstract

Isopthalamide based probe DPI has been synthesized by an easy two-step substitution reaction. Unique fluorescence properties of probe DPI were exploited for sensing of CNˉ and chloroform. Various spectroscopic techniques such as NMR, LC-MS, SEM, DLS, UV-Vis. and fluorescence spectroscopy in combination with DFT studies were used to confirm efficient detection of CN‾ through a non-covalent interaction of cyanide with probe. Furthermore, probe showed fluorescence emission at 360 nm which shifted significantly to 415 nm upon addition of water exhibiting unique AIE characteristics and formation of desired J-aggregates. Mechanistically, CN‾ and chloroform were selectively detected through fluorescence quenching with 9 nM and 0.2 % v/v limit of detection (LOD), respectively. Photoinduced electron transfer (PET) was proven to be involved as a sensing mechanism. Moreover, DPI exhibited interesting solvatochromism properties. DPI was proven to be a highly sensitive probe which showed solid-state and vapor phase on-field detection of CN‾. Similar sensing behavior of DPI probe towards CN‾ was seen in food and water samples.

Abstract Image

基于聚合诱导发射探针的氰化物和氯仿检测与实际样品应用
通过简单的两步取代反应,合成了基于间苯二甲酰胺的探针 DPI。探针 DPI 的独特荧光特性被用于传感 CNˉ 和氯仿。通过核磁共振、液相色谱-质谱、扫描电子显微镜、DLS、紫外可见光谱和荧光光谱等多种光谱技术,并结合 DFT 研究,证实了氰化物与探针的非共价作用可有效检测到 CN-‾。此外,探针在 360 纳米波长处发出荧光,当加入水后,荧光明显转移到 415 纳米波长处,显示出独特的 AIE 特性,并形成了所需的 J-聚集体。从机理上讲,通过荧光淬灭可选择性地检测到氯化萘和氯仿,检测限(LOD)分别为 9 nM 和 0.2 % v/v。光诱导电子转移(PET)被证明是一种传感机制。此外,DPI 还表现出有趣的溶解变色特性。事实证明,DPI 是一种高灵敏度的探针,可在固态和气相场上检测到 CN‾。在食品和水样品中,DPI探针也能对CN-‾产生类似的传感行为。
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来源期刊
Journal of hazardous materials letters
Journal of hazardous materials letters Pollution, Health, Toxicology and Mutagenesis, Environmental Chemistry, Waste Management and Disposal, Environmental Engineering
CiteScore
10.30
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0
审稿时长
20 days
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