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Crystals 2016, 6(10), 132; doi:10.3390/cryst6100132

Synthesis, Crystal Structure, and Luminescent Properties of New Zinc(II) and Cadmium(II) Metal-Organic Frameworks Based on Flexible Bis(imidazol-1-yl)alkane Ligands

1
Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, Lavrentieva Ave. 3, 630090 Novosibirsk, Russia
2
Department of Chemical Engineering, Altai State Technical University, 46 Lenin Ave., 656038 Barnaul, Russia
3
Department of Natural Sciences, Novosibirsk State University, Pirogova Str. 2, 630090 Novosibirsk, Russia
4
Department of Biotechnology and Organic Chemistry, National Research Tomsk Polytechnic University, 30 Lenin Ave., 634050 Tomsk, Russia
*
Author to whom correspondence should be addressed.
Academic Editors: Claudia Rawn and Winnie Wong-Ng
Received: 1 September 2016 / Revised: 28 September 2016 / Accepted: 11 October 2016 / Published: 13 October 2016
(This article belongs to the Special Issue Crystallography of Functional Materials)
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Abstract

New metal-organic frameworks (MOFs) based on zinc and cadmium ions, terephthalic acid, and flexible ligands 1,5-bis(imidazol-1-yl)pentane or 1,6-bis(imidazol-1-yl)hexane were prepared and characterized by X-ray diffraction, thermorgavimetric analysis and IR spectroscopy. The imidazolyl ligands were prepared by a new robust procedure involving the reaction between imidazole and 1,5-dibromopentane or 1,6-dibromohexane in a superbasic medium (KOH in DMSO). MOFs based on 1,5-bis(imidazol-1-yl)pentane had diamond topology (dia) and are triply interpenetrated. Ligands with longer spacer 1,6-bis(imidazol-1-yl)hexane, terephthalate ions and zinc(II) ions formed five-fold interpenetrated metal-organic framework also with dia topology, while cadmium(II) ions with the same ligands formed eight-connected uninodal net with a very rare self-penetrated topological type ilc and a point symbol 424.5.63. The influence of the chemical composition of MOFs on their photoluminescent properties is investigated and discussed in detail. View Full-Text
Keywords: imidazole; bis(imidazol-1-yl)alkanes; zinc; cadmium; metal-organic frameworks; luminescence; flexible ligands imidazole; bis(imidazol-1-yl)alkanes; zinc; cadmium; metal-organic frameworks; luminescence; flexible ligands
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Barsukova, M.; Goncharova, T.; Samsonenko, D.; Dybtsev, D.; Potapov, A. Synthesis, Crystal Structure, and Luminescent Properties of New Zinc(II) and Cadmium(II) Metal-Organic Frameworks Based on Flexible Bis(imidazol-1-yl)alkane Ligands. Crystals 2016, 6, 132.

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