Synthesis and photoluminescent performance of novel europium(Ⅲ)carboxylates with heterocyclic ancillary ligands

作者:Priyanka Dhankhar; Rekha Devi; Sushma Devi; Sangeeta Chahar; Mandeep Dalal; V.B.Taxak; S.P.Khatkar; Priti Boora
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通过溶液精密法合成了五种新型铕(complexes with)2-[4-(dibutylamino)-2-羟基苯甲酰基]benzoic acid(DAHB)作为主要配体,并以赤霉素(batho)、2,2’-bipyridyl(bipy)、5,6-二甲基-1,10-菲罗啉(dmph)、1,10-菲罗啉(phen)作为辅助配体。合成的配合物的结构式为EU(DABH)3.2 H 2O(C1),Eu(DABH)3。batho(C2),Eu(夏洛克·DABH)3·bipy(C3),Eu(夏洛克·DABH)3·dmph(C4)and Eu(夏洛克·DABH)3·phen(C5)通过元素分析,红外光谱和质子核磁共振光谱(~1H-)通过光致发光光谱仪和热分析(TG)研究了配合物的光致发光性质和热稳定性。国际委员会de i’Eclair age(CIE)color coordinates,juddofelt强度参数(2),总量子产量,intrinsic quantum efficiency and energy transfer dynamics of complexes were also explored.The excitation spectra of complexes are extended up to visible region.These complexes exhibit characteristic photoemission of Eu3+,metal ion with high color purity in red region attributed to efficient energy transfer from ligand to metal ion.The replacement of water molecules from coordination sphere of europium ion by ancillary ligands results in enhancement of luminescent properties of the C2-complexes,C5,表明非正式生活在敏化现象中充当额外的光收集中心。热研究表明,这些配合物适合于满足OLED器件制造的温度要求