Eu(DBM) 3 4,4′-BIPY的晶体结构和荧光光谱

Science in China. Series B, Chemistry, life sciences & earth sciences Pub Date : 1995-06-10 DOI:10.1360/ZB1995-25-6-561

金林培刘世雄蔡冠梁黄金陵秦伟平黄世华王明昭, Jin Lin-Pei Wang Zhe-Min Ca Guan-Liang Zhang Jia-Hua Wang Meng-Zhao

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引用次数: 0

摘要

标题配合物式量M r =979.91,单斜晶系 C μ0 空间群, a =2.0413(4), b =2.5556(5), c =0.8926(3)nm,β=104.64(2)°,μ=14.44cm -1 , T =295K.用 I ≥3σ( I )2180个可观察衍射数据对64个非氢原子的原子坐标和各向异性温度因子进行全矩阵最小二乘精修,最终偏离因子 R =0.043.标题配合物通过4,4-BIPY的两个吡啶环之间的C—C键相连形成一维链状结构.中心Eu(Ⅲ)离子与周围6个氧和一对氮原子配位,配位多面体属畸变四方反棱柱体,结合晶体结构测定和荧光光谱测定结果判断,其点对称性为 C 2 .高分辨激光激发光谱和荧光光谱还表明,配合物在激发态时存在 5 D 0 。能级能量相差39cm -1 的两种Eu(Ⅲ)格位.选择激发荧光光谱、时间分辨荧光光谱和选择激发荧光衰减曲线都证明配合物受激时Eu(Ⅲ)格位之间的非辐射能量传递程度非常大,较低能量的Eu(Ⅲ)格位对发光的贡献占绝对优势.

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Eu(DBM) 3 4,4′-BIPY的晶体结构和荧光光谱

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Science in China. Series B, Chemistry, life sciences & earth sciences

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