Luminescent Coordination Polymer with Ultrasensitive "Turn-On" Hg2+ Sensing Ability and Its Portable Hydrogel Test Kit.

IF 4.7 2区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Pub Date : 2025-10-01 DOI:10.1021/acs.inorgchem.5c03549

Jinfang Zhang,Shuaixing Wang,Jiamin Wang,Dejing Yin,Chi Zhang

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引用次数: 0

Abstract

Hg2+ has serious effects on ecosystems and human health. Thus, it is very important to develop simple and efficient methods to detect Hg2+. A luminescent coordination polymer (LCP) [Cd(L)(1-NA)2(H2O)·(L)(H2O)0.5]n (1) was constructed by 5,5'-((9H-fluoren-9-ylidene)-methylene)dipyrimidine (L) and 1-naphthoic acid (1-NA) with rigid groups. 1 demonstrates a 1-D wave-like chain structure. Its fluorene and naphthalene groups from adjacent chains exist in π-π interaction. 1 has excellent water, pH, and thermal stability. It exhibits very rare and ultrahigh sensitive "turn-on" Hg2+ sensing ability. Its detection limit toward Hg2+ is extremely low (8.86 × 10-8 M). Particularly, the fluorescence intensity of the water suspension of 1 (2.5 mL, 0.05 mg mL-1) can be rapidly enhanced by approximately 80 times after only adding Hg2+ solution (200 μL, 1 mmol). Accordingly, 1 shows the lowest LOD and the highest emission enhancement in all LCP-based "turn-on" Hg2+ sensors. Furthermore, 1 was immobilized in a hydrogel to fabricate a portable test kit to realize the convenient, fast, and quantitative Hg2+ detection. This study provides an excellent sensor material and the first on-site platform for environmental monitoring of Hg2+.

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具有超灵敏“开启”Hg2+传感能力的发光配位聚合物及其便携式水凝胶检测试剂盒。

Hg2+对生态系统和人类健康有严重影响。因此，开发简单有效的Hg2+检测方法具有重要意义。以5,5′-（(9h -芴-9- ylidee)-亚甲基）二嘧啶(L)和1-萘酸（1- na）为刚性基团，构建了发光配位聚合物（LCP） [Cd(L)(1- na)2（H2O）·(L)(H2O)0.5]n(1)]。1为一维波状链结构。其相邻链上的芴和萘基团以π-π相互作用存在。1具有优异的水、pH和热稳定性。它表现出非常罕见的超高灵敏度的“开启”Hg2+感应能力。对Hg2+的检出限极低（8.86 × 10-8 M）。其中，仅加入Hg2+溶液（200 μL, 1 mmol）后，1 （2.5 mL, 0.05 mg mL-1）水悬浮液的荧光强度可快速增强约80倍。因此，在所有基于lcp的“开启”Hg2+传感器中，1显示了最低的LOD和最高的发射增强。将1固定在水凝胶中，制作便携式检测试剂盒，实现方便、快速、定量的Hg2+检测。本研究为Hg2+环境监测提供了一种优良的传感器材料和首个现场平台。

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来源期刊

Inorganic Chemistry 化学-无机化学与核化学

CiteScore

7.60

自引率

13.00%

发文量

1960

审稿时长

1.9 months

期刊介绍： Inorganic Chemistry publishes fundamental studies in all phases of inorganic chemistry. Coverage includes experimental and theoretical reports on quantitative studies of structure and thermodynamics, kinetics, mechanisms of inorganic reactions, bioinorganic chemistry, and relevant aspects of organometallic chemistry, solid-state phenomena, and chemical bonding theory. Emphasis is placed on the synthesis, structure, thermodynamics, reactivity, spectroscopy, and bonding properties of significant new and known compounds.