| Metal-organic frameworks?MOFs?are an important branch of the coordination polymers,which widely used in many fields due to their diversified structures and various functions.In recent years,they have been widely designed and synthesized by researchers.Those not only increase the research process of the coordination polymer,but also promote the development of coordination chemistry.In this paper,we chose the N-containing as the main ligand,supplemented by the common carboxylic acid to obtain 13 new polymers by self-assembly approach.The thirteen new polymers have been characterized by X-ray single crystal structure analysis,IR,element analysis,powder X-ray diffraction?PXRD?.The photoluminescence and the electrochemical properties of these polymers have also been investigated.1.A family of 9 polymers were obtained by mixing the ligand 1H-pyrazolo[3,4-b]pyri din-3-amine?L ligand?with various of poly carboxyl ate ligands:[Zn?1,3-BDC??L?]?1?,[Zn1.5?1,3,5-BTC??L??H20?]?2?,[Zn4.5?5-SO3-1,3-BDC??L?4?OH?2]?3?,[C d3?1,2-BDC?3?L?3?H2O?8]?4?,[Cd3?1,3-BDC?3?L??H2O?3]?5?,[Cd?1,4-BDC??L?]?6?,[Mn3?1,3-BDC?3?L??H2O?3]?7?2[Zn4?CHDA?2.5?L?2?OH?]?8?,[Cd2?CHDA?2?L?2?H2 O?]?9?.?1,3-H2BDC= 1,3-benzenedicarboxylic acid,1,3,5-H3BTC=1,3,5-Benzenetri carboxylicacid,5-SO3-1,3-H2BDC =5-Sulfoisophthalic acid,1,2-H2BDC=1,2-benze nedicarboxylic acid,1,4-H2BDC=1,4-benzenedicarboxylicacid,H2CHDA=1,4-Cyclo hexanedicarboxylic acid?.The corresponding properties are characterized,such as the photoluminescence properties,magnetic properties and electrochemical prop erties.For example,the central metal ion of the polymer7 is Mn2+ ions,the m agnetic properties of it are measured.The results indicate that it present the a ntiferromagnetic interactions.In addition,we also studied the electrochemical pr operties of the polymers 1-9,for brevity,we selected polymer7 and L ligand a s a representative.The result showed that the electrode reaction process of L1 igands and the polymer7 were controlled by adsorption,and the redox ability of the L ligand decreasedafter coordination.2 A family of 4 polymers were obtained according to the ligand 1,4-Cyclohexane dicarboxylic acid,[Cd?CHDA??PYZ?0.5?H2O?3]?10?,[Cd?HCHDA?2?PYZ??H2O?]?11?,[Cd?CHDA?2?APYZ?0.5?H2O?1.5]?12?,[Cd?HCHDA?2?APYZ??H2O?]?13??H 2CHDA=1,4-Cyclohexanedicarboxylic acid,PYZ = pyrazine,APYZ = 2-aminopyr azine?It is noteworthy that the two pairs of polymers 10 and 11,12 and 13 ar e obtained only by changing the pH regulator,respectively.Their structural diff erences are mainly reflected in the differences of amino groups in N ligands.I n order to study the influence of functional groups on the photoluminescence properties of the four polymers,under the same conditions,the photoluminescen ce properties of them are measured.The results showed that the amino groups could enhance the photoluminescence properties of the polymer,which provide d a good experimental basis for the design and synthesis of photoluminescence materials. |
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