New mixed ligand based Cd(II) coordination polymer: An apt reversible turn-off-on photoluminescent sensor for dopamine and 2-hydroxybenzoic acid

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments Pub Date : 2025-07-16 DOI:10.1016/j.dyepig.2025.113037

Ren-Min Ma , Jing Luo , Xin Song , Jun Wang , Mohammad Khalid Parvez , Mohammed S. Al-Dosari , Manoj Trivedi , Daniel Omoding , Abhinav Kumar

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引用次数: 0

Abstract

A new Cd(II)-coordination polymer (CP) having formula [Cd₂(L)(HL)(Hbpa)(H₂O)·3H₂O]_n (1) have been synthesized using 5-(4′-carboxylphenoxy) isophthalic acid (H₃L) and bis(4-pyridyl)amine (bpa) ligands and characterized. The crystallographic study reveals that CP 1 possess two Cd²⁺ centers in asymmetric unit in which one is six coordinate whilst other adopts seven coordinate mode. The CP 1 exhibits turn-off photoluminescent sensing in presence of dopamine (DA) showcasing limit of detection and K_SV of 4.69 × 10⁻⁴ M and 204.46346 M^-1, respectively. Interestingly, the DA@1 exhibited restoration in photoluminescent emission on adding salicylic acid (2-hyd acid) and hence can be used as turn-on photoluminescent sensor for the selective and sensitive detection of 2-hyd acid with limit of detection 3.37 × 10⁻⁴ M with K_SV value of 282.45426. Theoretical calculations indicate that the turn-off sensing of DA by 1 have been accredited to the energy and charge transfer from 1 to DA along-with non-covalent interactions between 1 and DA. The restoration in photoluminescence intensity of DA@1 on adding 2-hyd acid has been accredited to the removal of DA from matrix of 1.

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新型混合配体基Cd（II）配位聚合物：一种适合于多巴胺和2-羟基苯甲酸的可逆开关光致发光传感器

以5-（4′-羧基苯氧基）间苯二甲酸（H3L）和双（4-吡啶基）胺（bpa）为配体合成了一种化学式为[Cd2(L)(HL)(Hbpa)（H2O）·3H2O]n(1)的新型Cd(II)-配位聚合物（CP），并对其进行了表征。晶体学研究表明，cp1在不对称单元中具有两个Cd2+中心，其中一个为六坐标模式，另一个为七坐标模式。cp1在多巴胺（DA）存在下表现出关闭光致发光传感，其检测限和KSV分别为4.69 × 10−4 M和204.46346 M-1。有趣的是，DA@1在加入水杨酸（2-水合酸）后，光致发光恢复，可作为2-水合酸选择性灵敏检测的导通光致发光传感器，检测限为3.37 × 10−4 M， KSV值为282.45426。理论计算表明，1对DA的关断感应是由1向DA的能量和电荷转移以及1与DA之间的非共价相互作用引起的。加入2-水合酸后DA@1光致发光强度的恢复被认为是由于DA从1的基质中去除。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Dyes and Pigments 工程技术-材料科学：纺织

CiteScore

8.20

自引率

13.30%

发文量

933

审稿时长

33 days

期刊介绍： Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied. Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media. The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.