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Crystals 2018, 8(9), 353; https://doi.org/10.3390/cryst8090353

New Topologically Unique Metal-Organic Architectures Driven by a Pyridine-Tricarboxylate Building Block

1
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
2
The Yixing Medical Center of Jiangsu University, Yixing 214200, China
3
Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
4
Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya st., Moscow 117198, Russia
*
Authors to whom correspondence should be addressed.
Received: 29 July 2018 / Revised: 21 August 2018 / Accepted: 23 August 2018 / Published: 3 September 2018
(This article belongs to the Section Crystal Engineering)
Full-Text   |   PDF [1712 KB, uploaded 3 September 2018]   |  

Abstract

Two new three-dimensional (3D) coordination compounds, namely a lead(II) coordination polymer (CP) {[Pb35-cpta)(µ6-cpta)(phen)2]·2H2O}n (1) and a zinc(II) metal-organic framework (MOF) {[Zn24-cpta)(µ-OH)(µ-4,4′-bipy)]·6H2O}n (2), were hydrothermally assembled from 2-(5-carboxypyridin-2-yl)terephthalic acid (H3cpta) as an unexplored principal building block and aromatic N,N-donors as crystallization mediators. Both products were isolated as air-stable microcrystalline solids and were fully characterized by IR spectroscopy, elemental and thermogravimetric analysis, and powder and single-crystal X-ray diffraction. Structural and topological features of CP 1 and MOF 2 were analyzed in detail, allowing to identify a topologically unique 4,5,5,6-connected net in 1 or a very rare 4,4-connected net with the isx topology in 2. Thermal stability and solid-state luminescent behavior of 1 and 2 were also investigated. Apart from revealing a notable topological novelty, both compounds also represent the first structurally characterized Pb(II) and Zn(II) derivatives assembled from H3cpta, thus opening up the application of this unexplored pyridine-tricarboxylate block in the design of new metal-organic architectures. View Full-Text
Keywords: metal-organic frameworks; hydrothermal synthesis; crystal structure; coordination chemistry; coordination polymers metal-organic frameworks; hydrothermal synthesis; crystal structure; coordination chemistry; coordination polymers
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Gu, J.; Cai, Y.; Wen, M.; Ge, Z.; Kirillov, A.M. New Topologically Unique Metal-Organic Architectures Driven by a Pyridine-Tricarboxylate Building Block. Crystals 2018, 8, 353.

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