A recyclable, fluorescent, and colorimetric sensor for fluoride anion in water using a crosslinked polymer functionalized with hydroxyl quinolinium

Abstract

This study aimed to develop a recyclable, fluorescent, and colorimetric sensor for fluoride anion (F − ) in aqueous media with fast response, good selectivity, and high sensitivity. A crosslinked polymer CpA1T5 was designed and synthesized as a sensor using (E)-1-allyl-4-(4-hydroxylphenyl) vinyl) quinolinium bromide as functional monomer, trimethylopropane trimethacraylate as crosslinker, and azobisisobutyronitrile as initiator. When F − was introduced to CpA1T5 suspension in deionized water, a change in color from gray to yellow and fluorescence enhancement accompanied with a redshift from 531 nm to 540 nm of fluorescence emission were immediately observed. This F − sensor can be recycled many times, making it cost efficient and beneficial to the environment. Analytical application of CpA1T5 to measure F − concentration in two commercial mouthwash samples was explored with good accuracy.

Research Progress of Organic Polymer Fluorescence Sensor

“…当然, 利用不同的反应可获得对同一检测物种以不 同机理进行检测的有机聚合物荧光探针. 例如, 对于 F -的检测, 通常是氢键型的 [58,[77][78][79] , 即使聚合物探针的类 型与获得方法不同 [100] . 但是, F -与缺电子 B 原子的配位 也可实现对 F -的检测.…”

A neutral porous organic polymer host for the recognition of anionic dyes in water

“…have been used previously for binding a range of molecules and ions in water. [50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66][67] To test our approach, here we have prepared Urea-POP-1, a urea-functionalized POP host. Urea is commonly used as a neutral hydrogen bond donor that effectively provides parallel hydrogen bonds to cooperatively bind electron rich oxyanions to offset the energetic penalty of desolvation.…”

A Neutral Porous Organic Polymer Host for the Recognition of Anionic Dyes in Water

“…[52][53][54] Even though POPs are insoluble, these properties have been exploited for binding a range of molecules and ions. [55][56][57][58][59][60][61][62][63][64][65][66][67][68][69] As such, we hypothesized that a POP could provide a hydrophobic microenvironment with a densely packed array of neutral hydrogen bond donors to cooperatively promote anion desolvation and recognition in water.…”