Issue 23, 2022

Mechano-thermochemical synthesis of rare-earth metal–organic frameworks with solvent-free coordination for visible and near-infrared emission

Abstract

Rare earth metal–organic frameworks are considered as one emerging class of materials with extraordinary photoluminescence functions. However, the coordination of solvent molecules, due to their intrinsic high coordination numbers, leads to non-radiative multiphoton relaxation, which impairs their luminescence. Therefore, in this contribution, we propose a mechano-thermochemical method as a universal approach towards achieving solvent-free rare-earth metal–organic frameworks. A novel series of solvent-free rare-earth metal–organic frameworks named TJU-66 has been synthesised, exhibiting a (3,6)-c net zxc topology with a rare 6,6 coordination shape, and presenting high stabilities. Isostructural mixed metal–organic frameworks have been created by doping with rare earth ions to further improve the luminescence, reflected in the extremely high quantum yields and fluorescence lifetimes. It is worth noting that the wavelengths of different mixed metal–organic frameworks cover the whole region of visible and near-infrared light. Furthermore, by doping with Sc, the fluorescence lifetime of the Yb-based MOFs could be greatly improved up to 43.1 μs, which is so far the highest value of Yb-based MOFs. Our series of TJU-66 materials has not only replenished the existing library of luminescent metal–organic frameworks, but also, the mechano-thermochemical method highlighted in this work may provide a general method for the future development of solvent-free materials with exclusive functions.

Graphical abstract: Mechano-thermochemical synthesis of rare-earth metal–organic frameworks with solvent-free coordination for visible and near-infrared emission

Supplementary files

Article information

Article type
Research Article
Submitted
19 8 2022
Accepted
08 10 2022
First published
10 10 2022

Mater. Chem. Front., 2022,6, 3504-3511

Mechano-thermochemical synthesis of rare-earth metal–organic frameworks with solvent-free coordination for visible and near-infrared emission

J. Liu, Y. Chen, X. Su and J. Gong, Mater. Chem. Front., 2022, 6, 3504 DOI: 10.1039/D2QM00839D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements