The effect of organic linkers on the supramolecular structures of two new Ni(II) cyclen complexes (cyclen = 1,4,7,10-tetraazadodecane) |
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Authors: | Zhihui Zhang Yanchun Lu Jianhua Guo |
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Affiliation: | (1) Department of Chemistry, Nankai University, Tianjin, 300071, P. R. China;(2) College of Chemistry and Life Science, Tianjin Normal University, Tianjin, 300074, P. R. China |
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Abstract: | Two new nickel(II)(cyclen) coordination polymers, {[Ni(cyclen)·(bipy)]·(ClO4)2}n (1) and [Ni(cyclen)]2·(squa)·(ClO4)2 (2) have been synthesized and characterized structurally, where cyclen is 1,4,7,10-tetraazadodecane. Compound 1 crystallizes in the monoclinic system, space group C2/c, with a = 10.5339(17) ?, b = 14.565(2) ?, c = 16.133(3) ?, β = 102.799(2)°, V = 2413.4(7) ?3. Compound 2 crystallizes in the orthorhombic system, space group P nm a with a = 25.722(3) ?, b = 11.1168(12) ?, c = 11.4580(13) ?, V = 3276.3(6) ?3. In both compounds, each NiII center is in a distorted octahedral coordinated environment with four Ncyclen atoms and two Npyridine atoms from 4,4′-bipyridine linker for 1 and two Oaqueou atoms from the coordinated water for 2, respectively. The complex 1 exhibits infinite zigzag 1D chains by linking of 4,4′-bipyridine coordinated. In complex 2, 2D sheet supramolecule generated through self-assembling by hydrogen bond. |
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Keywords: | Nickel (II) complex 4,4′ -bipyridine squate acid 1,4,7,10-tetraazadodecane supramolecule |
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