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4674603 
Journal Article 
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 
Rsbay, M; Kavakh, PA; Tilki, S; Kavakh, C; Guven, O; Barsukova, M; Goncharova, T; Samsonenko, D; Dybtsev, D; Potapov, A 
2016 
MDPI AG 
6 
10 
English 
WOS:000390105100013 
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 4(24).5.6(3). The influence of the chemical composition of MOFs on their photoluminescent properties is investigated and discussed in detail. 
imidazole; bis(imidazol-1-yl) alkanes; zinc; cadmium; metal-organic frameworks; luminescence; flexible ligands