Based On The Flexible Dual Function Of Imidazole Ligands To Construct The Synthesis, Structure And Properties Of Materials Research

Flexible ligands exhibit more advantages in the synthesis process of coordination polymers for their changeful space configuration and rich coordination modes. A series of coordination polymers with novel structures and unique characters have been synthesized. They attract many chemists for their huge potential application in gas storage, photoelectricity, magnetism, catalysis and separation. With the further development of coordination chemistry, crystal engineering has been enriched. It can guide the synthesis of coordination polymers and complete leap from self-assemble to directional synthesis. The paper contains constructing coordination polymers with flexible double-imidazole ligand and rigid auxiliary ligands, and making a research of crystal structures and properties of coordination polymers. Full text is divided into three parts:In Part1, the basic concepts and developments of coordination chemistry, coordination polymers and crystal engineering are briefly introduced. The synthesis method, classification and influence factors in the process of synthesis of coordination polymer are also illuminated. Moreover, it have been showed that the research progress and application status of polymers with imidazole ligand, and the summarize of the topic purpose and meaning.In Part2, seven novel coordination polymers based on1,4-bis(2-methyl-imidazol-1-yl)b-utane, rigid carboxylic acids ligands and transtion metal ions Zn(Ⅱ), Co(Ⅱ), Cd(Ⅱ) have been synthesized successfully,[Co(BIB)(5-NIPA)]n(1),[Cd(BIB)(IPA)]n(2),{[Zn2(BIB)(5-AIPA)2]·2H2O}n(3),[Co(BIB)(5-AIPA)]n(4),[Co(BIB)(5-OIPA)]n(5),[Zn(BIB)(5-OIPA)]n(6),[Zn3(4,4’-ADB)3(BIB)2]n (7),(BIB=1,4-bis(2-methyl-imidazol-1-yl)butane,5-NIPA=5-nitroisophthalic acid, IPA=Isophthalic acid,5-AIPA5-aminoisophthalic acid,5-OIPA=5-hydroxyisophthalic acid, ADB=azobenzene-4,4’-dicarboxylica acid). The target coordination polymers have been characterized by X-ray single-crystal diffraction, X-ray powder diffraction, elemental analysis, IR spectra, fluorescence spectrometry, and thermogravimetric analysis, which are expected to find potential application value.In Part3, six novel coordination polymers based on1,4-bis[(2-methyl-imidazol-1-yl) methyl]benzene, rigid carboxylic acids ligands and transtion metal ions Zn(Ⅱ), Co(Ⅱ) have been synthesized successfully,[Zn2(BMB)(5-AIPA)2]·2H2O}n (8),[Zn2(BMB)(5-AIPA)2]·2H2O}n(8),[Co2(BMB)(5-AIPA)2]·2H2O}n (9),[Zn2(BMB)(5-NIPA)]n(10),[Co(BMB)(5-NIPA)]n(11),{[Co(BMB)(TPA)]·H2O}n(12),{[Zn(BMB)(TPA)]·DMF·2H2O}n(13),(BMB=1,4-bis[(2-methyl-imidazol-1-yl)methyl]benze ne,5-AIPA=5-aminoisophthalic acid,5-NIPA=5-nitroisophthalic acid, TPA=p-phthalic acid). The crystal structure and physical and chemical performance of the target coordination polymers have been characterized.In Part4, the conclusion.