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新型“开式”环金属铱配合物次氯酸盐荧光探针的合成与应用
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作者单位
王婷婷,任美娟,吴芳辉,叶明富,叶晶晶,查习文 1. 安徽工业大学 化学与化工学院安徽 马鞍山 243000 2. 成都信息工程大学 信息材料及器件化应用四川省高校重点实验室四川 成都 610225 
基金项目:国家自然科学基金(21771003);安徽省自然科学基金(1808085MB36);国家级大学生创新创业训练计划项目(202110360036)
中文摘要:设计合成了一种新型灵敏的荧光化学探针[Ir(bzq)2(L1)](PF6)(bzq = 苯并喹啉,L1 = 4'-甲基-2,2'-联吡啶-4-甲醛肟)并进行了详细表征。将该配合物用于对次氯酸盐(ClO-)的荧光测定,发现加入ClO-后,探针溶液的荧光显著增强,在365 nm紫外灯下由暗棕色迅速转变为明亮的橙黄色,可能是配体L1中的肟作为反应位点被ClO-氧化为羧酸,抑制了非辐射衰变过程从而使探针发射出强荧光。在优化实验条件下,探针[Ir(bzq)2(L1)](PF6)的荧光强度与ClO-浓度在0.1 ~ 210 μmol/L范围内呈良好的线性关系,检出限为3.08 nmol/L。荧光探针对ClO-的选择性较好,其它可能的共存离子不干扰测定。采用该方法测定了当地河水中的次氯酸盐,加标回收率为92.4% ~ 103%,结果令人满意,表明该方法可用于实际样品中ClO-的测定。
中文关键词:荧光探针  铱配合物  次氯酸盐  合成  应用
 
Synthesis and Application of a Novel “Switch-on” Cyclometalated Iridium Complex Fluorescent Probe for Hypochlorite Detection
Abstract:In this paper,a novel sensitive fluorescent probe[Ir(bzq)2(L1)](PF6)(bzq,i.e. benzoquinoline,and L1,i.e. 4'-methyl-2,2'-bipyridine-4-formaldehyde oxime) was synthesized and characterized in detail.After adding hypochlorite(ClO-) in [Ir(bzq)2(L1)](PF6) system,the fluorescence of this complex was significantly enhanced because the oxime group on L1 as the reaction site was transformed into the carboxylic acid,resulting in a bright visible orange-yellow light from dark brown under a 365 nm ultraviolet lamp.Under the optimum conditions,the fluorescence intensity of [Ir(bzq)2(L1)](PF6) probe showed a good linear relationship with hypochlorite in the concentration range of 0.1-210 μmol/L,with a detection limit of 3.08 nmol/L.The selective and competitive experiments revealed that this probe showed better selectivity and sensitivity for ClO- than that for other ions.The proposed method was applied to the detection of ClO- in local river samples with satisfactory recoveries of 92.4%-103%,suggesting that the fluorescent probe could be used for analysis of ClO- in practical samples.
Key Words:fluorescent probe  iridium complex  hypochlorite  synthesis  application
引用本文:王婷婷,任美娟,吴芳辉,叶明富,叶晶晶,查习文.新型“开式”环金属铱配合物次氯酸盐荧光探针的合成与应用[J].分析测试学报,2022,41(8):1170-1177.
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