TY - JOUR
T1 - 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
AU - Barsukova, Marina
AU - Goncharova, Tatiana
AU - Samsonenko, Denis
AU - Dybtsev, Danil
AU - Potapov, Andrei
N1 - Funding Information:
The reported study was supported by the Russian Science Foundation, Grant No. 15-13-10023. The authors are grateful to M.I. Rakhmanova for luminescence measurements and V.D. Orogodnikov for recording NMR spectra.
Publisher Copyright:
© 2016 by the authors; licensee MDPI, Basel, Switzerland.
PY - 2016
Y1 - 2016
N2 - 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.
AB - 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.
KW - Bis(imidazol-1-yl)alkanes
KW - Cadmium
KW - Flexible ligands
KW - Imidazole
KW - Luminescence
KW - Metal-organic frameworks
KW - Zinc
UR - http://www.scopus.com/inward/record.url?scp=84992372067&partnerID=8YFLogxK
U2 - 10.3390/cryst6100132
DO - 10.3390/cryst6100132
M3 - Article
AN - SCOPUS:84992372067
SN - 2073-4352
VL - 6
JO - Crystals
JF - Crystals
IS - 10
M1 - 132
ER -