Scholarlink

<p>A hetero-bimetallic metal–organic framework (MOF) (Zn-Cd-MOF, Zn<sub>2</sub>Cd(DMF)<sub>2</sub>(L)<sub>6</sub>}n (L = 2,5-bis(phenylamino)-1,4-benzenedicarboxylic acid), featuring a dense topology assembled through synergistic Zn<sup>2+</sup> and Cd<sup>2+</sup> coordination, has been synthesized via a direct solvothermal approach. Compared to its monometallic analogues (Zn-MOF or Cd-MOF), Zn-Cd-MOF exhibits significantly improved stability in water and diverse organic solvents. Moreover, this bimetallic framework displays tunable fluescence properties, enabling effective distinction between protic and aprotic solvents. This unique fluorescence response is attributed to the excited-state intramolecular proton transfer (ESIPT) process of the ligand, in which competitive hydrogen bonding with water molecules modulates the enol-keto tautomer equilibrium. The material also demonstrates excellent reusability, maintaining stable performance over at least 5 consecutive cycles for detecting water in organic solvents, and retains structural integrity for over 2 years. This study offers a new strategy for constructing stable MOFs based on low-valence metal and carboxylate ligands, while also providing a practical design concept for identifying protic solvents in aprotic environments.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Hetero-nuclear metal organic framework with enhanced hydrolytic stability for distinguishing between the protic and aprotic solvents and detecting water in organic solvents

  • 期刊论文

  • 发表日期：

    2026年2月6日

查看全文
  • Yixuan Xu,
  • Jiawei Tian,
  • Fanpeng Ran,
  • Qin Huang,
  • Xiaoyu Wang,
  • Junbao Ma,
  • Xiaoyan Liu,
  • Haixia Zhang

摘要

A hetero-bimetallic metal–organic framework (MOF) (Zn-Cd-MOF, Zn2Cd(DMF)2(L)6}n (L = 2,5-bis(phenylamino)-1,4-benzenedicarboxylic acid), featuring a dense topology assembled through synergistic Zn2+ and Cd2+ coordination, has been synthesized via a direct solvothermal approach. Compared to its monometallic analogues (Zn-MOF or Cd-MOF), Zn-Cd-MOF exhibits significantly improved stability in water and diverse organic solvents. Moreover, this bimetallic framework displays tunable fluescence properties, enabling effective distinction between protic and aprotic solvents. This unique fluorescence response is attributed to the excited-state intramolecular proton transfer (ESIPT) process of the ligand, in which competitive hydrogen bonding with water molecules modulates the enol-keto tautomer equilibrium. The material also demonstrates excellent reusability, maintaining stable performance over at least 5 consecutive cycles for detecting water in organic solvents, and retains structural integrity for over 2 years. This study offers a new strategy for constructing stable MOFs based on low-valence metal and carboxylate ligands, while also providing a practical design concept for identifying protic solvents in aprotic environments.

Graphical Abstract