A europium(II) complex with bis-pyridino-18-crown-6
A europium(II) complex with bis-pyridino-18-crown-6
复制标题
DOI：
10.1016/j.poly.2008.05.028
复制
发表时间：
2008-08-21
期刊：
影响因子：
2.6
通讯作者：
Starynowicz, Przemyslaw
中科院分区：
文献类型：
--
作者：
Christoffers, Jens;Starynowicz, Przemyslaw
用电解还原法制备了一种新的Eu(II)络合物bis(perchlorato)(bis-pyridino-18-crown)europium(II)，。金属离子是10配位的，其周围由4个大环O原子、2个N原子和4个高氯酸根O原子组成。该化合物表现出一个很宽的吸收带，从600 nm向紫外区缓缓开始，并有两个微弱的发光带，峰值位于430和500 nm。密度泛函理论计算表明，吸收是f-d、f-S和电荷转移混合跃迁的结果。文中还讨论了可能的发光机理。(C)2008爱思唯尔有限公司。保留所有权利。
A new Eu(II) complex, bis(perchlorato)(bis-pyridino-18-crown)europium(II), has been obtained in the crystalline form by electrolytic reduction. The metal ion is 10-coordinated and its surrounding consists of four macrocycle O atoms, two N ones and four O atoms from perchlorate anions. The compound shows a very broad absorption band, starting gently from 600 nm towards the UV region, and two weak luminescence bands with maxima at 430 and 500 nm. The performed density functional theory (DFT) calculations have shown that the absorption results from mixed f-d, f-s and charge transfer transitions. The possible mechanism of luminescence is also discussed. (C) 2008 Elsevier Ltd. All rights reserved.