Detecting H2S Gas Concentration by 1,8-Naphthalimides Fluorescent Probe  

作　　者：唐东林[1] 王瞧 出毅能 李瑞海[2] TANG Dong-lin;WANG Qiao;CHU Yi-neng;LI Rui-hai(Key Laboratory of Petroleum-Gas Equipmentsof Ministry of Education,College of Mechanical andElectrical Engineering,Southwest Petroleum University,Chengdu　610500,China;College of Polymer Science&Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]西南石油大学机电工程学院,四川成都610500 [2]四川大学高分子材料工程学院,四川成都610065

出　　处：《光谱学与光谱分析》2018年第4期1319-1323,共5页Spectroscopy and Spectral Analysis

基　　金：Supported by the National Natural Science Foundation of China(41474142)

摘　　要：针对传统硫化氢检测方法灵敏度低的问题,以1,8-萘酰亚胺为荧光基团,基于H_2S的还原性,通过在荧光分子结构上引入具有氧化性的硝基,合成一种可与硫化氢气体发生氧化还原反应生成有荧光响应的小分子荧光探针。该探针本身荧光十分微弱,且荧光峰值在λ=467nm和λ=522nm处。与H_2S反应之后,522nm处的荧光效应消失,467nm处的荧光效应显著增强。测定小分子荧光探针在通入H_2S气体前后的荧光光谱,分析467nm处的荧光强度与气体浓度关系。结果表明:荧光光谱法检测出的H_2S气体浓度与荧光强度之间存在很强的线性关系,相关系数为0.979 3,最低可检测极限可达0.88×10^(-6 )mol·L^(-1)量级。表明基于1,8-萘酰亚胺衍生物的荧光光谱检测法可为油气田H_2S气体浓度的的快速测定提供参考。Aiming at the low sensitivity of traditional hydrogen sulfide detection method,a small-molecule fluorescent probe was designed and synthesized for hydrogen sulfide detection via introducing oxidizing group of nitro on the 1,8-naphthalimide fluorescence group,based on the nitro group could be reduced by hydrogen sulfide to produce the corresponding amino group.The fluorescence intensity of probe was very weak,and the fluorescence peaks were atλ=467 nm andλ=522 nm.After reacting with H 2S,fluorescent effect disappeared at 522 nm,it significantly enhanced at 467 nm.The fluorescence spectrum of fluorescent probewas measured after being introduced into H 2S,and the fluorescence intensity at 467 nm was analyzed.The experimental result showed an excellent linear relationship between H 2S gas concentration and fluorescence intensity,while the linear correlation coefficient was up to 0.979 3.Meanwhile,the minimum H 2S gasconcentration that could be detected was only 0.88×10-6 mol·L-1.Fluorescence spectrometric detection of 1,8-naphthalimides solution can be used for the H 2S gas rapid determination in oil and gas fields.

关 键 词：光学测量 硫化氢浓度 1 8-萘酰亚胺衍生物 荧光光谱 

分 类 号：TN383.2[电子电信—物理电子学]