Syntheses and crystal structures of a series of coordination polymers constructed from C2-symmetric ligand 1,3-adamantanedicarboxylic acid.
This article systematically investigates the influence of the properties of inhomogeneous N-auxiliary ligands and pH value on the helical structures of complexes based on C(2)-symmetric ligand 1,3-adamantanedicarboxylic acid (H(2)ADC). Five kinds of neutral ligands (phen=1,10-phenanthroline, bipy=4,4'-bipyridine, bpa=1,2-bis(4-pyridyl)ethane, bpe=1,2-bis(4-pyridyl)ethane, and bpp=1,3-bis(4-pyridyl)propane) were selected, and a series of new Zn(II)/Co(II) dicarboxylates have been synthesized by slow diffusion, namely, [Zn(phen)(ADC)(H(2)O)](2).CH(3)OH (1), {[Zn(ADC)(bpe)].H(2)O}(n) (2), {[Zn(ADC)(bipy)].2H(2)O}(n) (3), {[Zn(ADC)(bpa)](2).5H(2)O}(n) (4), {[Zn(ADC)(bpp)](2).CH(3)OH}(n) (5), {[Zn(ADC)(bpp)]}(n) (6), {[Co(ADC)(bpp)(CH(3)OH)(H(2)O)].CH(3)OH2 H(2)O}(n) (7), and {[Co(ADC)(bpp)]}(n) (8). Single-crystal X-ray structural analysis shows that complex 1 forms a 0D dinuclear with closed-loop unit. The complex 2 is a 2D layer framework. Compounds 3 and 4 are isomorphous with a small discrepancy and present one-dimensional chainlike structures. It is interesting that the 2D organic-inorganic hybrid frameworks containing meso-helical chains have been observed. Compound 5 is a 2D interpenetrated network with (4,4) topology, in which homochiral left-handed helical chains are arranged in an ABAB sequence parallel to the plane defined by (a,c), and right-handed helical chains running along the a axis are also observed in the solid state, resulting in a meso-helical structure. Compounds 6, 7, and 8 crystallize in a chiral space group P212121. Highly dimensional 6 and 8 are essentially isostructural and present a threefold interpenetrated 3D diamondoid network containing three helical chains, whereas 7 exhibits a 2D grid layer with a left-handed helical chain. Furthermore, thermal stability, X-ray powder diffraction, and the luminescent properties of 1-6 are also discussed.
Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry and Materials Science, Northwest University, Xi'an 710069, P. R. China.
Jun-Cheng
JC
Jin
Ya-Nan
YN
Zhang
Yao-Yu
YY
Wang
Jian-Qiang
JQ
Liu
Zhe
Z
Dong
Qi-Zhen
QZ
Shi
D000218:Adamantane / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry; D003035:Cobalt / Q000737:chemistry; D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry; D018360:Crystallography, X-Ray; D003998:Dicarboxylic Acids / Q000138:chemical synthesis / Q000737:chemistry*; D008024:Ligands; D008968:Molecular Conformation; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry; D015032:Zinc / Q000737:chemistry
C421745:1,3-adamantanedicarboxylic acid; D056831:Coordination Complexes; D003998:Dicarboxylic Acids; D008024:Ligands; D011108:Polymers; D003035:Cobalt; D015032:Zinc; D000218:Adamantane