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Paper Details

Effect of Substituents on the Photoluminescence Performance of Ir(III)Complexes: Synthesis and Photo Physical Properties

H.K. Dahule1 and S.J.Dhoble2

Journal Title:Journal of Chemical, Biological and physical sciences

A series of substituted 2,4 diphenyl quinoline ligands namely (Cl-DPQ),(OMe DPQ),and M-DPQ) have synthesized. These compounds readily undergo cyclometalation with iridium trichloride and form iridium (III) dopants of the substituted 2,4 diphenyl quinoline ligands. Synthesized compounds emit red color in solid as well as in solution phase. The peak emission wavelength of the dopants (?max = 610-650 nm) can be tuned depending upon the electronic properties of the methoxy, chloronine and methyl substituents as well as their positions in the 2,4 diphenyl quinoline ring. These synthesized iridium complexes were characterized by 1HNMR, DTA/TGA, XRD, and FTIR . The molecular structure of M-DPQ,OMe-DPQ, Cl-DPQ Ir(M-DPQ)2(acac) ,Ir(OMe-DPQ)2(acac) and Ir(Cl-DPQ)2(acac) is confirmed by the FTIR spectra. The photo physical properties were studied by UV-vis absorption and photoluminescence. The synthesized quinoline-based iridium complexes are promising candidates for efficient red emitters.