摘要
标题配合物Ｍ＝１８９２．０１，单斜晶系，空间群Ｐ２１／ｃ，ａ＝１．２９７５（３）ｎｍ，ｂ＝２．６５９１（９）ｎｍ，ｃ＝１．２１１８（３）ｎｍ，β＝９６．９５（１）°，Ｚ＝２，Ｄｃ＝１．５７７ｇ／ｃｍ３，Ｔ＝２９３（２）Ｋ。最终的偏离因子Ｒ＝０．０５８３。该配合物以二聚体形式存在，通过其中的桥联羧基形成了双核分子。该分子中羧基具有桥联双齿、桥联三齿和单齿三种配位模式，Ｅｕ－Ｅｕ之间的距离为０．４０１９（１）ｎｍ。在７７Ｋ下测得配合物中Ｅｕ（Ⅲ）离子仅有一种格位。５Ｄ０→７ＦＪ（Ｊ＝０～２）跃迁光谱说明Ｅｕ（Ⅲ）离子格位具有Ｃ２对称性。
; The new title complex crystallizes in monoclinic system with space group P2\-1/c, a=1.2975(3) nm, b=2.6591(9) nm, c=1.2118(3) nm, =96.95(1), Z=2, M=1892.01, D\-c=1.577 g/cm\+3, T=293(2)K. The final R=0.0583. The title complex is a dimer, which is linked by the bridged carboxylate groups to form a binuclear molecule. The carboxylate groups in the complex are bonded to the europium ion in the brindged bidentate, the bridged tridentate and the monodentate modes. EuEu distance is 0.4019(1) nm. The results of fluorescence of the complex observed at 77K using 337.1 nm radiation show that the only one Eu() ion site is in the complex. \+5D\-0\+7F\-J(J=0￣2) transition fluorescence spectra combined with the results of XRay analysis confirm the C\-2 symmetry of the Eu() ion site.\;\;
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
1999年第3期305-309,共5页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金
北京市科干局青年基金
关键词
铕配合物
晶体结构
荧光光谱
双核
铕
配合物
europium complex\ \ \ crystal structure\ \ \ fluorescence spectra
