Synthesis and structure of luminescent hetero-metal coordination complex of Cd2Ln2 (Ln= Sm and Eu)

INOR 675

Shu Yun Niu, syniu@sohu.com, Zhao Long Wang, syniu@sohu.com, and Ru Wang, syniu@sohu.com. School of Chemistry and Chemical Engineering, Liaoning Normal University, Huanghe Road 850, Dalian, 116029, China
Two single crystals, [Sm2Cd2(C8H7O2)10(phen)2] (1) and [Eu2Cd2(C8H7O3)10(phen)2](2), have been hydrothermally synthesized. In (1), each Sm(III) ion is 7-coordinated and Cd(II) ion is 6-coordinated.Three p-CH3-C6H4COO groups bridge one Sm(III) and Cd(phen) forming sub-unit. Other four p-CH3-C6H4COO groups bridge two Sm(III) from two sub-units forming four-nuclear complex. In (2), it also exist two sub-units constructed by three p-CH3O-C6H4COO groups bridges Cd(phen) and [Eu(H2O)(C8H7O3)2]. The weak bond of Eu-Ocoord.water between the two sub-units leads the four-nuclear complex. Each Eu(III) ion is 9-coordinated and Cd(II) ion is 6-coordinated. In (1), the emissions (lmax=411nm, 387nm and372nm) and (lmax=600nm, 647nm and 563nm) are observed. The former come from LMCT and LLCT of d block and the latter from ffCT of Sm(III) (4G5/2→6H7/2,9/2,5/2). In (2), only the ffCT of Eu(III) (lmax=617nm, 592nm and 722nm) are observed (4D0→7H2,1,5). This work was supported by the NSFC (Nos. 20571037 and 90201018).
 

Coordination Chemistry: Characterization and Applications
7:00 PM-10:00 PM, Tuesday, 12 September 2006 Moscone Center -- Hall D, Poster

Sci-Mix
8:00 PM-10:00 PM, Monday, 11 September 2006 Moscone Center -- Hall D, Sci-Mix

Division of Inorganic Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006