Naphthalenedisulfonate-based Cd(II) CPs as fluorescent sensors for turn-on and red-shift sensing of tryptophan

IF 2.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Polyhedron Pub Date : 2024-09-24 DOI:10.1016/j.poly.2024.117237

Fang-Hua Zhao, Shu-Qi Li, Rui Feng, Zhong-Lin Li, Yuan-Chun He

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Abstract

Tryptophan (Trp) is one of the essential amino acids in human body, which is important for human health. Therefore, convenient strategies for the detection of Trp are very significant. Coordination polymers (CPs) have presented great importance as fluorescent sensors in recent years. Herein, two Cd(II) CPs were synthesized as fluorescent sensors for turn-on and red-shift sensing of tryptophan, namely, {[Cd(1,4-bbix)₂(1,5-NDS)]·(H₂O)₂}_n (1) and {[Cd(bmbp)₂(H₂O)₂]·(1,5NDS)(H₂O)₄}_n (2), (1,5-NDS = 1,5-naphthalenedisulfonate, 1,4-bbix = 1,4-bis(benzimidazol-1-yl-methyl)benzene, bmbp = 4,4′-bis(2-methylimidazole-1-yl-methyl)biphenyl). 1 shows a three-dimensional (3D) structure with 6-connected pcu topology. 2 shows a 1D chain, which is connected by hydrogen-bonds to form the 3D supramolecular structure. Both CPs can effectively detect Trp via fluorescence enhancement and red-shift in aqueous solution with the limits of detection being 1.11 μM and 0.69 μM for 1 and 2, respectively. Two CPs also can be applied for the detection of Trp in milk with good sensitivity. The sensing mechanisms toward Trp were investigated via experimental and theoretical calculation methods. The test films were prepared for the visual detection of Trp.

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基于萘二磺酸盐的镉(II) 氯化物作为荧光传感器，用于色氨酸的开启和红移传感

色氨酸（Trp）是人体必需氨基酸之一，对人体健康非常重要。因此，便捷的 Trp 检测策略意义重大。近年来，配位聚合物（CPs）作为荧光传感器发挥了重要作用。本文合成了两种镉（II）配位聚合物作为荧光传感器，用于色氨酸的开启和红移传感，它们分别是{[Cd(1,4-bbix)2(1,5-NDS)]-(H2O)2}n (1)和{[Cd(bmbp)2(H2O)2]-(1、1,5-NDS=1,5-萘二磺酸盐，1,4-bbix=1,4-双（苯并咪唑-1-基-甲基）苯，bmbp=4,4′-双（2-甲基咪唑-1-基-甲基）联苯）。1 显示的是具有 6 个连接 pcu 拓扑结构的三维（3D）结构。2 显示的是一维链，通过氢键连接形成三维超分子结构。两种氯化石蜡都能在水溶液中通过荧光增强和红移有效地检测 Trp，1 和 2 的检测限分别为 1.11 μM 和 0.69 μM。这两种氯化石蜡也可用于检测牛奶中的 Trp，并具有良好的灵敏度。通过实验和理论计算方法研究了对 Trp 的传感机制。制备了用于视觉检测 Trp 的测试薄膜。

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来源期刊

Polyhedron 化学-晶体学

CiteScore

4.90

自引率

7.70%

发文量

515

审稿时长

2 months

期刊介绍： Polyhedron publishes original, fundamental, experimental and theoretical work of the highest quality in all the major areas of inorganic chemistry. This includes synthetic chemistry, coordination chemistry, organometallic chemistry, bioinorganic chemistry, and solid-state and materials chemistry. Papers should be significant pieces of work, and all new compounds must be appropriately characterized. The inclusion of single-crystal X-ray structural data is strongly encouraged, but papers reporting only the X-ray structure determination of a single compound will usually not be considered. Papers on solid-state or materials chemistry will be expected to have a significant molecular chemistry component (such as the synthesis and characterization of the molecular precursors and/or a systematic study of the use of different precursors or reaction conditions) or demonstrate a cutting-edge application (for example inorganic materials for energy applications). Papers dealing only with stability constants are not considered.