Two heterometallic MOFs fluorescence probes: Their syntheses, structures, and sensing properties

IF 4.6 2区化学 Q1 SPECTROSCOPY Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-10-05 Epub Date: 2025-04-09 DOI:10.1016/j.saa.2025.126167

Yongyang Chen , Shuai Su , Ruijie Xu, Dechao Li, Yefang Yang, Wenping Hu, Wenting Li, Ming Hu

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Abstract

Based on a 2-(2,6-bis(pyrazine-2-yl)pyridine-4-yl) benzene-1,3,5-tricarboxylic acid ligand (H₃pbta), two isomorphic d–f heterometallic organic frameworks with porous three-dimensional structures were successfully synthesized, namely, {[LnCd₂(pbta)₂Cl(H₂O)₄](H₂O)₄}_n(1, Ln = Eu; 2, Ln = Tb). The experimental results indicated that complex 1 and 2 exhibited stable luminescence in a wide range of in aqueous solution. Notably, complex 1 could recognize palmatine (PMT) in simulated human urine and complex 2 was able to distinguish tartrazine (TAR) in some food additives. It was worth pointing out that complex 1 and 2 displayed high selectivity, recoverability, anti-interference, and low detection limits for the identification of PMT and TAR in aqueous solution, respectively. In addition, the fluorescence mechanisms for the detection of PMT and TAR were elucidated in detail by the corresponding experiments and theoretical calculations. Also, the fluorescent sensing films based upon complex 1 and 2 were fabricated to visually discern PMT and TAR for their practical applications, respectively.

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两种异质金属mof荧光探针的合成、结构和传感性能

以2-（2,6-二（吡嗪-2-基）吡啶-4-基）苯-1,3,5-三羧酸配体（H3pbta）为基础，成功合成了两个具有多孔三维结构的d-f异质金属有机骨架：{[LnCd2(pbta)2Cl(H2O)4](H2O)4}n(1, Ln = Eu；Ln = Tb)。实验结果表明，配合物1和2在水溶液中具有较宽范围的稳定发光。值得注意的是，配合物1可以识别模拟人尿中的棕榈碱（PMT），配合物2可以识别某些食品添加剂中的酒黄石（TAR）。值得注意的是，配合物1和2在水溶液中分别对PMT和TAR具有高选择性、可恢复性、抗干扰性和低检出限。此外，通过实验和理论计算，详细阐述了PMT和TAR的荧光检测机理。同时，制备了基于配合物1和2的荧光传感膜，分别用于视觉识别PMT和TAR的实际应用。

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来源期刊

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 物理-光谱学

CiteScore

8.40

自引率

11.40%

发文量

1364

审稿时长

40 days

期刊介绍： Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (SAA) is an interdisciplinary journal which spans from basic to applied aspects of optical spectroscopy in chemistry, medicine, biology, and materials science. The journal publishes original scientific papers that feature high-quality spectroscopic data and analysis. From the broad range of optical spectroscopies, the emphasis is on electronic, vibrational or rotational spectra of molecules, rather than on spectroscopy based on magnetic moments. Criteria for publication in SAA are novelty, uniqueness, and outstanding quality. Routine applications of spectroscopic techniques and computational methods are not appropriate. Topics of particular interest of Spectrochimica Acta Part A include, but are not limited to: Spectroscopy and dynamics of bioanalytical, biomedical, environmental, and atmospheric sciences, Novel experimental techniques or instrumentation for molecular spectroscopy, Novel theoretical and computational methods, Novel applications in photochemistry and photobiology, Novel interpretational approaches as well as advances in data analysis based on electronic or vibrational spectroscopy.