| In recent years,the complex with persistent organic room temperature phosphorescence(RTP)has come into people’s view and rapidly become the research hotspot.This kind of material with persistent room temperature phosphorescence phenomenon has been used in some cutting-edge fields such as anti-counterfeiting,encryption and biological imaging due to its large Stokes shift and long life.In addition,coordination compounds have also been used in electrochemical tests in recent years,and it has been proved that the complex synthesized by us has a good catalytic effect on hydrogen evolution after being applied to electrocatalysis.This paper mainly includes the following three parts:(1)In this chapter,a series of complexes were synthesized with Zn(Ⅱ)and Cd(Ⅱ)metal ions under solvothermal conditions using m-benzoic acid-azocyclic ligand 5-(3Lithium formate-1H-1,2,4-triazole-1-methyl)benzene-1,3-dicarboxylate(Li3ctbd),in order as follows:[Cd(b-ctbd)(H2O)2]n(1),{[Cd(b-ctbd)(H2O)2]·H2O}n(2),{[Cd(bctbd)2(H2O)]·H2O}n(3),[Cd(b-ctbd)(pyridine)2]n(4),[Zn(b-ctbd)2(H2O)]n(5),[Zn(b-ctbd)(pyridine)]n(6),[Zn(b-ctbd)(H2O)]n(7).Among them,complexes 1,3 and 5 have been synthesized in the laboratory.The single crystal data show that complexes 1,2,5～7 belong to 2D structure,while complexes 3 and 4 belong to 1D chain structure.The results of powder diffraction show that the purity of complexes 1～7 is very high,and elemental analysis and infrared characterization.Finally,we also tested the solid fluorescence and phosphorescence properties of the complexes 1～7 and ligands at room temperature,which was consistent with our initial observation of long afterglow phenomenon with the naked eye.Complexes 1～7 showed interesting time-resolved afterglow modulation,and yellow or green can be observed during the attenuation process after the UV lamp is turned off.The experimental data show that the complexes 1 and 2 can emit yellow light(short life)and green light(long life),which belongs to the double phosphorescent emission at room temperature.Complex 3～7 can only emit single green light(life up to microsecond),which belongs to single phosphorescent emission.Based on the study of the long afterglow properties,the complex luminescence has certain application value in security and anti-counterfeiting,and can be made into anti-counterfeiting materials.(2)In this chapter,a series of new coordination compounds with certain spatial structure were synthesized by the reaction of ligand 3-(3,5-dicarboxylic phenoxy)-6carboxylic pyridine(H3dpcp)with six metal ions Sr(Ⅱ),Zn(Ⅱ),Cu(Ⅱ),Co(Ⅱ),Pb(Ⅱ)and Cd(Ⅱ)under solvothermal conditions.Respectively is:[Sr(dpcp)(H2O)2]n(8),{[Zn3(dpcp)2(pyridine)3(OH)(H2O)(OCH3)]·H2O}n(9),{[Cu2(dpcp)2(pyridine)2(H2O)]·2H2O}n(10),{[Co(dpcp)(pyridine)]·H2O}n(11),{[Pb(dpcp)]·CH3OH}n(12),{[Cd(dpcp)2(Cl)2(CH3)4]·H2O}n(13).The crystal data show that complexes 8 and 12 are 3D structures,complexes 9～11 are 1D chains,and complex 13 is an independent unit.After powder diffraction(PXRD),elemental analysis and infrared spectroscopy(IR)and a series of characterization,we investigated the fluorescence properties of the ligands and their complexes 8,9,12 and 13 at room temperature.Complex 8 and 9 have certain afterglow phenomenon by naked eye observation,and through the phosphorescence test of these two complexes,it is proved that complex 8 and 9 emit single green light(life up to several hundred subtle),which is single phosphorescence emission.(3)In this chapter,the metal-organic complex RuCl2(O2CR)(PPh3)2(where R stands for ferrocene)is taken as the starting point to extend the application of the complex in electrochemistry.The coordination of organic ligands and metal ions to form a new kind of nanomaterial with a certain spatial structure and its application to electrochemical hydrogen production is also the highlight of this chapter.A certain temperature gradient(550℃,650℃,750℃ and 850℃)was set to calcine the obtained gel material in nitrogen atmosphere to form Fe doped Ru based catalyst with certain pore structure.The hydrogen evolution activity of the catalysts was studied by linear scanning voltammetry(LSV)at a scanning rate of 2 mV s-1 in 1.0MKOH solution.The potential corresponding to the current density of 10 mA cm-2 was measured,respectively,to roughly determine their catalytic performance.Among them,the catalyst with better catalytic performance was formed at 650℃,and its corresponding potential was 89 mV.After fitting,it can be obtained that its Tafel slope was 85 mV Dec-1.After 10000 cycles of CV,the catalytic activity was basically unchanged,and the catalyst was relatively stable. |
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