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Title: Two Ce-containing 3D metal–organic frameworks: In situ formation of ligand (DDPD)

Hydrothermal reactions of cerium nitrate and 5-hydroxyisophthalic acid (OH-H{sub 2}BDC) produce two new metal–organic frameworks (MOFs), ([Ce(DDPD){sub 1.5}(H{sub 2}O){sub 2.5}]·4H{sub 2}O){sub n} (1) and ([Ce(OH-BDC)(OH-HBDC)(H{sub 2}O){sub 2}]·2H{sub 2}O]{sub n} (2) (DDPD(II)=5,10-dioxo-5,10-dihydro-4,9-dioxapyrene-2,7-dicarboxylate(II)). These two complexes have been characterized by elemental analysis, IR, TG, and single-crystal X-ray diffraction. It was remarkable that the in situ reaction of OH-H{sub 2}BDC to DDPD(II) was found in complex 1. In 1, Ce(III) ions are bridged by DDPD ligands to form infinite 1D chain, which is further connected via DDPD ligands to form 3D structure. Complex 2 possesses a neutral noninterpenetrating 2D layer structure. Furthermore, the fluorescence properties and magnetic behavior of 1 and 2 have been investigated. - Graphical abstract: In complex 1, the in situ reaction of OH-H{sub 2}BDC to DDPD(II) was found. Complex 1 features a 3D network structure. Adjacent Ce(III) ions are bridged by two carboxylate groups to form a 1D infinite inorganic chain, and further linked by the DDPD(II) ligands. Display Omitted - Highlights: • Complexes 1 and 2 was synthesized via hydrothermal methods. • In situ reaction of OH-H{sub 2}BDC to DDPD(II) was found in complex 1. • Ce(III) ions are bridged by the DDPD(II) ligands to generate a 3Dmore » structure in complex 1. • Complex 2 possesses a neutral noninterpenetrating 2D layer structure. • Fluorescent properties and magnetic behavior of 1 and 2 have been studied.« less
Authors:
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Publication Date:
OSTI Identifier:
22274196
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 210; Journal Issue: 1; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CERIUM NITRATES; FLUORESCENCE; HYDROTHERMAL SYNTHESIS; LIGANDS; MONOCRYSTALS; X-RAY DIFFRACTION