深铬移
化学
锌
荧光
选择性
吸收(声学)
离子
螯合作用
检出限
氯化物
配体(生物化学)
碱金属
无机化学
水溶液中的金属离子
光化学
材料科学
有机化学
催化作用
色谱法
物理
复合材料
受体
量子力学
生物化学
作者
Dikhi Firmansyah,Denisa Shofihatul Qolby,Lia Dewi Juliawaty,Brian Yuliarto
标识
DOI:10.1002/asia.202300187
摘要
Abstract Friedel‐Crafts acylation of dipyrromethane with cinnamoyl chloride was conducted to obtain dicinnamoyl dipyrromethane compounds 3 and 4 . Both compounds were subsequently oxidized by DDQ to produce dicinnamoyl dipyrromethene ligands ( DC‐1 and DC‐2 ). A large bathochromic shift compared to dipyromethene ( D ) was observed at 95 nm for DC‐1 and 67 nm for DC‐2 . Both compounds showed remarkable chelation‐enhanced fluorescence (CHEF) upon addition of zinc(II) ions. Similar to the quadrupolar system, DC‐1 exhibited absorption and emission near the optical windows of the tissue. However, asymmetrical DC‐2 had a better “turn‐on” CHEF, with a fluorescence intensity that was 22 times higher than that of compound D . The DC‐2 ligand also showed a limit of detection (LOD) of up to 3.0×10 −8 M and selectivity toward zinc(II) ions compared to alkali and alkaline earth metal ions.
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