Design,synthesis and photophysical properties of a new class of iridium(iii)complexes
Three new metallic iridium phosphor complexes were synthesized by using 1-phenylisoquinoline,2-(4-methylphenyl)pyridine as ring metal ligands,trifluoro-1-(2-phenyl)-1,3-butanedioic acid,trifluoro-1-(2-furanyl)-1,3-butanedioic acid as co-ligands.The chemical structures of the three target products were confirmed by NMR and MS characterization,and their photophysical properties were tested by UV-Vis absorption and fluorescence spectra.The main emission peaks of the three complexes in dichloromethane solution at room temperature were 619 nm,577 nm,and 630 nm,respectively,in the range of orange yellow light to red light.It was speculated that the emission light red-shifted when the ring metal ligands had higher conjugation degree,and the emission light red-shifted when the group in the co-ligands had stronger electron-donating ability.The three-dimensional fluorescence spectra of the three complexes were measured and plotted,which can be used for qualitative analysis.
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