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Synthesis, Structural Features, and Catalytic Activity of an Iron(II) 3D Coordination Polymer Driven by an Ether-Bridged Pyridine-Dicarboxylate

1
Guangdong Research Center for Special Building Materials and Its Green Preparation Technology, Foshan Research Center for Special Functional Building Materials and their Green Preparation Technology, Guangdong Industry Polytechnic, Guangzhou 510300, China
2
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
3
Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
4
Research Institute of Chemistry, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya st., 117198 Moscow, Russia
*
Authors to whom correspondence should be addressed.
Crystals 2019, 9(7), 369; https://doi.org/10.3390/cryst9070369
Received: 9 June 2019 / Revised: 16 July 2019 / Accepted: 18 July 2019 / Published: 20 July 2019
(This article belongs to the Section Crystal Engineering)
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Abstract

New iron(II) three-dimensional coordination polymer (3D CP), [Fe(µ3-Hcpna)2]n (1), was assembled under hydrothermal conditions from 5-(4’-carboxyphenoxy)nicotinic acid (H2cpna) as a trifunctional organic N,O-building block. This stable microcrystalline CP was characterized by standard methods for coordination compounds in the solid state (infrared spectroscopy, elemental analysis, thermogravimetric analysis, powder and single-crystal X-ray diffraction). Structure and topology of 1 were examined and permitted an identification of a 3,6-connected framework of the rtl topological type. In addition, compound 1 acts as effective catalyst precursor for oxidative functionalization of alkanes (propane and cyclic C5−C8 alkanes) under homogeneous catalysis conditions, namely for the oxidation of saturated hydrocarbons with H2O2/H+ system to produce ketones and alcohols, and for alkane carboxylation with CO/H2O/S2O82− system to obtain carboxylic acids. The influence of an acid promoter and substrate scope (propane and cyclic C5−C8 alkanes) were investigated. View Full-Text
Keywords: metal-organic frameworks; coordination polymers; iron; hydrothermal synthesis; crystal engineering; C-H functionalization; homogeneous catalysis; cycloalkanes; propane; oxidation; carboxylation metal-organic frameworks; coordination polymers; iron; hydrothermal synthesis; crystal engineering; C-H functionalization; homogeneous catalysis; cycloalkanes; propane; oxidation; carboxylation
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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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Zhao, N.; Li, Y.; Gu, J.; Kirillova, M.V.; Kirillov, A.M. Synthesis, Structural Features, and Catalytic Activity of an Iron(II) 3D Coordination Polymer Driven by an Ether-Bridged Pyridine-Dicarboxylate. Crystals 2019, 9, 369.

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