Issue 17, 2022

Construction of multi-hydroxyl/ketone lanthanide metal–organic frameworks for understanding mechanochromic luminescence and high proton conductivity

Abstract

Two types of lanthanide metal–organic frameworks (LnMOFs) [Zr16-BPDC-Eu1−xTbx] and [Zr16-Eu1−xTbx] (x = 0.17, 0.25, 0.5) were designed and constructed through the directed assembly of multi-hydroxyl/ketone Zr-oxo clusters and Ln3+ ions in a single-crystal-to-single-crystal (SCSC) structural transformation manner. [Zr16-BPDC-Eu1−xTbx] is the first type of LnMOF to be found with mechanochromic luminescence (MCL) properties; for example, the emission color of [Zr16-BPDC-Eu0.83Tb0.17] can change from yellow to orange-red when stimulated by mechanical forces, compared to which the luminescence of [Zr16-Eu0.83Tb0.17] only becomes dark yellow. The proton conduction properties of [Zr16-BPDC-Eu] and [Zr16-Eu] were investigated because of the multi-hydroxyl/ketone character in their structures, and the proton conductivity of [Zr16-Eu] was found to be 6.17 × 10−2 S cm−1 at 358 K and 98% relative humidity, which is the highest among hydroxyl/ketone-function MOFs. The LnMOFs with MCL and high proton conductivity pave the way to the development of more valuable properties and applications of LnMOFs.

Graphical abstract: Construction of multi-hydroxyl/ketone lanthanide metal–organic frameworks for understanding mechanochromic luminescence and high proton conductivity

Supplementary files

Article information

Article type
Research Article
Submitted
21 May 2022
Accepted
02 Jul 2022
First published
13 Jul 2022

Inorg. Chem. Front., 2022,9, 4376-4384

Construction of multi-hydroxyl/ketone lanthanide metal–organic frameworks for understanding mechanochromic luminescence and high proton conductivity

B. Hou, S. Yang, B. Li, G. Li, H. Zheng, C. Qin, G. Shan, Z. Su and X. Wang, Inorg. Chem. Front., 2022, 9, 4376 DOI: 10.1039/D2QI01103D

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