新型铕双β-二酮红光材料的合成与发光性质

Synthesis and Photoluminescence of a Novel Red Light Material Eu^(3+) Bis(β-diketonate) Complex

通过分子设计,合成了一种新颖的双β-二酮有机配体9-乙基-3,6-二(乙酰基-3-苯甲酰基)咔唑(H2L)及其铕配合物,红外光谱和电子光谱表明Eu3+与H2L发生配位。配合物的溶液荧光光谱不仅有613 nm处的中心离子Eu3+的特征红光,属5D0→7F2跃迁带,还有445 nm处配体的宽带蓝色发光,属H2L*→H2L跃迁带,而配合物的光致发光光谱只有611 nm处为中心离子Eu3+的特征红光,属5D0→7F2跃迁带,峰形尖锐,半峰宽仅7 nm,单色性好,表明该固体铕双β-二酮配合物是一种潜在的红色发光材料。

By molecular designing, a novel bis （β- diketonate） ligand 3,6-bis （ aeetyl-3-benzoyl）-9-ethyl- earbazole （H2L） and its Eu^3＋ complex were synthesized and characterized by IR and UV-vis spectra. According to luminescence spectrum of complex, 613 nm was attributed to ^5D0→^7F2transition from Eu^3＋ ion and the wide blue band can be assigned to H2L^＊→H2L.The photoluminescence of complex indicated that there was a sharp and strong red peak with 7 nm mid-width at 611 nm, which was attributed to ^5D0→^7F2 transition from Eu^3＋ ion. The results showed that solid Eu^3 ＋-bis （β-diketonate） complex would be a kind of excellent red light material.