Effect of Metal Centers of 2D MOFs With Benzothiadiazole-Based Ligand on Sensing Performance of Alkaline-Earth Metal Ions

IF 3.7 2区化学 Q2 CHEMISTRY, APPLIED

Applied Organometallic Chemistry Pub Date : 2025-07-01 DOI:10.1002/aoc.70283

Kai-Yang Zhang, Yong-Hao Zou, Zhao-Feng Qiu, Jia-Qi Chen, Lei Xu, Wei-Yin Sun, Yue Zhao

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Abstract

In this work, a new manganese-based luminescent metal–organic framework (MOF) with the formula of [Mn₃(AIBTD)₄(NO₃)₂(DMF)₂] (Mn-MOF, DMF = N,N-dimethylformamide) was prepared by using a benzothiadiazole-functionalized ligand, 4-(7-(1H-imidazol-1-yl)benzo[c][1,2,5]thiadiazol-4-yl)benzoic acid (HAIBTD), to react with Mn (NO₃)₂ under solvothermal conditions. Structural analysis revealed that Mn-MOF possesses a similar two-dimensional (2D) network structure to the reported Cd-MOF and Zn-MOF with the formula of [Cd₃(AIBTD)₄(HCOO)₂(DMF)₂] and [Zn (AIBTD)(AA)] (AA = acetate), respectively. The fluorescence sensing capability of Mn-MOF, Cd-MOF, and Zn-MOF towards metal cations was investigated, and the results demonstrate that these MOFs could function as turn-on fluorescent sensors for alkaline-earth metal ions (AE²⁺) including Mg²⁺, Ca²⁺, Sr²⁺, and Ba²⁺. Interestingly, compared to the Zn-MOF and Cd-MOF, Mn-MOF shows the best sensing performance towards AE²⁺ cations with the lowest detection limit of 8.5, 4.5, 4.8, and 6.3 μM for Mg²⁺, Ca²⁺, Sr²⁺, and Ba²⁺, respectively. Furthermore, the turn-on fluorescence sensing mechanism was investigated and may be attributed to the absorption-caused enhancement (ACE) mechanism. X-ray photoelectron spectral (XPS) analysis indicates that the enhancement in absorption is primarily attributed to host-guest interactions. This work may pave a new way for the development of fluorescent sensors towards AE²⁺ cations.

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含苯并噻二唑基配体的二维mof金属中心对碱土金属离子传感性能的影响

本研究利用苯并噻唑功能化配体4-（7-（1h -咪唑-1-基）苯并[c][1,2,5]噻二唑-4-基）苯甲酸（HAIBTD）与Mn (NO3)2在溶剂热条件下反应，制备了一种新型锰基发光金属有机骨架（MOF），分子式为[Mn3(AIBTD)4(NO3)2(DMF)2] （Mn-MOF, DMF = N，N-二甲基甲酰胺）。结构分析表明，Mn-MOF具有与所报道的Cd-MOF和Zn- mof相似的二维（2D）网络结构，其分子式分别为[Cd3(AIBTD)4(HCOO)2(DMF)2]和[Zn (AIBTD)(AA)] （AA =乙酸）。研究了Mn-MOF、Cd-MOF和Zn-MOF对金属阳离子的荧光传感能力，结果表明，这些mof可以作为Mg2+、Ca2+、Sr2+和Ba2+等碱土金属离子（AE2+）的开启荧光传感器。有趣的是，与Zn-MOF和Cd-MOF相比，Mn-MOF对AE2+的传感性能最好，对Mg2+、Ca2+、Sr2+和Ba2+的最低检测限分别为8.5、4.5、4.8和6.3 μM。此外，我们还研究了荧光传感的开启机制，认为这可能归因于吸收引起的增强（ACE）机制。x射线光电子能谱（XPS）分析表明，吸收增强主要归因于主客体相互作用。本研究为AE2+离子荧光传感器的发展开辟了新的道路。

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

Applied Organometallic Chemistry 化学-无机化学与核化学

CiteScore

7.80

自引率

10.30%

发文量

408

审稿时长

2.2 months

期刊介绍： All new compounds should be satisfactorily identified and proof of their structure given according to generally accepted standards. Structural reports, such as papers exclusively dealing with synthesis and characterization, analytical techniques, or X-ray diffraction studies of metal-organic or organometallic compounds will not be considered. The editors reserve the right to refuse without peer review any manuscript that does not comply with the aims and scope of the journal. Applied Organometallic Chemistry publishes Full Papers, Reviews, Mini Reviews and Communications of scientific research in all areas of organometallic and metal-organic chemistry involving main group metals, transition metals, lanthanides and actinides. All contributions should contain an explicit application of novel compounds, for instance in materials science, nano science, catalysis, chemical vapour deposition, metal-mediated organic synthesis, polymers, bio-organometallics, metallo-therapy, metallo-diagnostics and medicine. Reviews of books covering aspects of the fields of focus are also published.