| Recently, the coordination chemistry has made great progress in the field of crystal engineering. Numerous coordination polymers (CPs) have been studied for their enormous varieties of interesting structural topologies, as well as their promising application as functionalized materials, such as optical, magnetic, catalytic and material chemistry. Despite of tremendous progress, it is difficult to predict the construction of CPs, due to the process of aggregation is influenced by several key factors. The internal factors include pH, solvent, temperature, and so on. A variant of one foregoing factors may lead to a drastic change in the dimensionality and topology. Therefore, using the "old" ligands through the regulation of external and internal factors still can get unexpected target product. In this paper, we choose a flexible double-imidazole ligand as the main ligand to explore the influence of various factors on the structure and properties of CPs.In part 1, we describe the concept, present situation and future development of the system from the aspects of coordination chemistry, CPs and crystal engineering. Then, several synthesis methods and influence factors of CPs are also described. In addition, the development status and application prospect of the Bis-imidazole ligand have been summarized, and then the significance of this paper has been proved.In part 2, based on the temperature-induced effect, reaction of Co(Ac)2-4H2O, 5-amino-2,4,6-triiodoisophthalic acid (H2atibdc), and 1,4-bis(2-methyl-imidazol-l-yl)butane(bib). At 80 ?, a new coordination polymer [Co(bib)(atibdc)]n (1) was isolated. At 130 ?, a pair of enantiomers were obtained, {Co(bib)(atibdc)]·2H2O}n (2a and 2b). At 150 ?, excited, an in situ iodine elimination reaction was occurred to generate a new linker 5-aminoisophthalic acid (aipa), cooperation with bib to construct a coordination polymer [Co(bib)(aipa)]n (3). This work exhibits a rare temperature-induced effect for the construction of coordination polymer. In addition, the magnetic properties of 1-3 have been investigated as well. In part 3, twelve d10 metal CPs based on flexible bib and various carboxylates coligands, {[Zn(bib)(atibdc)]·2H2O}n(4),{[Zn(bib)(atbip)]·H2O}n(5), [Zn2(bib)(5-Br-ipa)]}n (6), {[Zn0.5(bib)0.5(bdc-Br2)0.5]·0.5H2O}n (7),{[Zn2(bib)2(1,4-ndc)2]·H2O}n (8), {[Zn(bib)(2,6-ndc)]}n (9),{[Zn(bib)0.5(4,4'-bpdc)]·H2O}n (10), {[Zn2.5(bib)(odpt)H2O]}n (11),{[Co(bib)(1,4-ndc·H2O}n (12), {[Co(bib)(bdc-Br2)]·0.5H2O}n (13),{[Cd(bib)(1,4-ndc)]·2H2O}n (14), {[Cd(bib)(2,6-ndc)]·H2O}n (15) have been synthesized under solvothermal conditions. The effect of organic carboxylic acid ligands on metal-bib system was studied. And its structure, related physical and chemical properties were also tested and analyzed.In part 4, the conclusion... |
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