A fluorescence-enhanced inverse opal sensing film for multi-sources detection of formaldehyde
作者机构：Key Laboratory of New Energy & New Functional Materials Shaanxi Key Laboratory of Chemical Reaction Engineering College of Chemistry and Chemical Engineering Yan’an University
出 版 物：《Food Science and Human Wellness》 (食品科学与人类健康(英文))
年 卷 期：2024年
核心收录：
学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学]
基 金：supported by the National Natural Science Foundation of China (Grant No. 21663032 and 22061041) the Open Sharing Platform for Scientific and Technological Resources of Shaanxi Province (Grant No. 2021PT-004) the National Innovation and Entrepreneurship Training Program for College Students of China (No. S202110719044)
摘 要：The SiO2inverse opal photonic crystals (PC) with a three-dimensional macroporous structure were fabricated by the sacrificial template method， followed by infiltration of a pyrene derivative， 1-(pyren-8-yl)but-3-en-1-amine (PEA)， to achieve a formaldehyde-sensitive and fluorescence-enhanced sensing film. Utilizing the specific Aza-Cope rearrangement reaction of allylamine of PEA and formaldehyde (FA) to generate a strong fluorescent product emitted at ～480 nm， we chose a PC whose blue band edge of stopband overlapped with the fluorescence emission wavelength. In virtue of the fluorescence enhancement property derived from slow photon effect of PC， FA was detected highly selectively and sensitively. The limit of detection (LoD) was calculated to be 1.38 nmol/L. Furthermore， the fast detection of FA (within 1 min) is realized due to the interconnected three-dimensional macroporous structure of the inverse opal PC and its high specific surface area. The prepared sensing film can be used for the detection of FA in air， aquatic products and living cells. The very close FA content in indoor air to the result from FA detector， the recovery rate of 101.5% for detecting FA in aquatic products and fast fluorescence imaging in 2 min for living cells demonstrate the reliability and accuracy of our method in practical applications.
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