Construction and Photoelectric Properties of CM6@Zn-MOF Nanophase Materials Based on Flexible Phenyldiacetate
Metal-organic frameworks(MOFs),as the donors of efficient energy transfer,have attracted the attention of many experts in the field of artificial light-harvesting materials.In particular,the two-dimensional MOFs nanoplates have more remarkable photoelectric properties because each active site can be easily accessible to the receptor when exposed to the outside,thus effectively transferring the internal energy to the external receptor.In this study,flexible 1,2-phenyldiacetic acid(H2opda)and rigid 3,5-bis(triazole)pyridine(btyp)were selected as organic ligands,a novel coordination polymer[Zn3(btyp)2(opda)3(H2O)3]·(btyp)(H2O)(Zn-MOF)was synthesized,which belonged to triclinic crystal system and P-1 space group.In the crystal structure,the two carboxyl groups of trans-opda ligand form one-dimensional infinite chain with Zn(Ⅱ)ion by double-tooth chelating coordination;btyp ligands support adjacent one-dimensional chains to form two-dimensional network surface;the three-dimensional supramolecular network structure was formed by the interaction of O—H…O between opda and H2O.Zn-MOF had a complete cyclic voltammetric curve(reduction and oxidation potentials are-0.22 and 0.05 V,respectively),and a good scanning rate.The layered structure of Zn-MOF was peeled off to form two-dimensional nanomaterials by ultrasonic comminution and then doped with Coumarin 6(CM6)to form CM6@Zn-MOF nanomat erials.The fluorescence moved from blue to green light,and expanded the light collection range from ultraviolet to visible light.Combined with the good electrochemical cyclic voltammetry performance(reduction and oxidation potentials are-0.21 and 0.08 V,respectively),CM6@Zn-MOF is expected to become a new material for photoelectric applications.
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