Issue 32, 2023

Designing scintillating coordination polymers using a dual-ligand synthetic approach

Abstract

Herein we report the synthesis and structural characterization of three new europium containing coordination polymers: [Eu(terpy)(2,6-ndc)1.5]·H2O (Linus Pauling (LP) 1), [Eu(terpy)(1,4-ndc)(1,4-Hndc)] (LP-2), and [Eu(phen)(2,6-ndc)1.5]·DMF (LP-3). The title compounds were prepared hydro- or solvo-thermally and are constructed from either 1,4- or 2,6-naphthalenedicarboxylic acid (ndc) and 1,10-phenanthroline (phen) or 2,2′:6′,2′′-terpyridine (terpy) ligands. The X-ray diffraction data show LP-2 is two-dimensional while LP-1 and LP-3 are three-dimensional. Compounds LP-1 and LP-2 exhibit modest thermal stability up to 400 °C, while LP-3 was notably unstable when removed from its reaction media and prone to degradation. Despite the apparent porosity, nitrogen physisorption measurements conducted on LP-1 and LP-2 revealed lower than anticipated surface area and pore volumes of 1 m2 g−1 and 0.037 cm3 g−1 and 1 m2 g−1 and 0.015 cm3 g−1, respectively. Photoluminescence characterization of all three compounds was performed in the solid state and in all cases the results reveal bright Eu3+-based emission. The excitation spectra show the emissive properties arise from efficient ligand-to-metal resonance energy transfer. Additionally, LP-1 and LP-2 also display emission when exposed to soft X-rays, and as such show promise toward the design of scintillators.

Graphical abstract: Designing scintillating coordination polymers using a dual-ligand synthetic approach

Supplementary files

Article information

Article type
Paper
Submitted
13 Apr 2023
Accepted
03 Jul 2023
First published
11 Jul 2023
This article is Open Access
Creative Commons BY license

CrystEngComm, 2023,25, 4496-4502

Designing scintillating coordination polymers using a dual-ligand synthetic approach

A. Arteaga, A. Lulich, M. Nyman and R. G. Surbella, CrystEngComm, 2023, 25, 4496 DOI: 10.1039/D3CE00358B

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