Synthesis, structure, and photoluminescence properties of lanthanide based metal organic frameworks and a cadmium coordination polymer derived from 2,2′-diamino-<i>trans</i> 4,4′-stilbenedicarboxylate

Golafale, Saki T, Ingram, Conrad W, Bacsa, John, Steiner, Alexander ORCID: 0000-0002-4315-6123 and Solntsev, Kyril M (2018) Synthesis, structure, and photoluminescence properties of lanthanide based metal organic frameworks and a cadmium coordination polymer derived from 2,2′-diamino-<i>trans</i> 4,4′-stilbenedicarboxylate. INORGANICA CHIMICA ACTA, 478. pp. 243-249.

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Abstract

Two isostructural lanthanide-based metal - organic frameworks, {[Ln(C16H12N2O4)(CHO2)(OH2)·2(C5H11NO)]}n, Ln = Yb (1) and Tm (2), and a cadmium(II) coordination polymer,{[Cd2(C16H12N2O4)(NO3)·4(C3H7NO)]}n, were synthesized by the combination of the respective metal nitrate and 2,2′-diamino-trans 4,4′-stilbenedicarboxylate (C16H12N2O4) under solvothermal conditions [C5H11NO = diethylformamide and C3H7NO = dimethylformamide]. Their structures were determined by X-ray single crystal analysis, X-ray powder diffraction, Fourier transformed infrared spectroscopy, elemental analysis, thermogravimetric analysis and solid state photoluminescence spectroscopy. Both lanthanide structures are infinite three-dimensional non-penetrating networks with extremely large diamond shape accessible channels of cross-sectional dimensions [30 Å x 12 Å] and with the amino-functional groups projecting into the channels. The cadmium-based structure is a one-dimensional coordination polymer with both the carboxylate and the amino groups coordinating the cadmium atoms, which resulted in a large increase in the rigidity of the ligand. Ligand-based fluorescence was exhibited by all three networks, with the cadmium based structure showing the highest intensity and longest fluorescence radiative lifetime.

Item Type:	Article
Depositing User:	Symplectic Admin
Date Deposited:	11 Apr 2018 08:38
Last Modified:	14 Oct 2023 11:42
DOI:	10.1016/j.ica.2018.04.005
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3020034