Zhai Bin, Yi Long, Wang Hong-Shen, Zhao Bin, Cheng Peng, Liao Dai-Zheng, Yan Shi-Ping
Department of Chemistry, Nankai University, Tianjin 300071, People's Republic of China.
Inorg Chem. 2006 Oct 16;45(21):8471-3. doi: 10.1021/ic060787f.
The hydrothermal reaction of Cr(NO3)3, Ln2O3, and iminodiacetate acid (H(2)IDA) in the molar ratio of 1:1:3 produced {[LnCr(IDA)2(C2O4)]}n (Ln = Eu, 1; Sm, 2), which represent the first 3D 3d-4f interpenetrating coordination polymers. In the reaction, the H(2)IDA ligands partly decompose into oxalate anions (ox), which connect Ln(III) ions to form 1D {Ln(ox)}n chains. Each of the Cr(III) ions is tridentate-coordinated by two IDA ligands, which act as tetradentate metalloligands to link {Ln(ox)}n chains to form 3D open networks. The two open networks interpenetrate each other to form nonporous products. 1 and 2 are thermally stable up to 327 and 360 degrees C, respectively. Both of complexes show normally paramagnetic behavior. The luminescent results imply that the energy transfers from Ln(III) to Cr(III) are strong.
硝酸铬（Cr(NO₃)₃）、氧化镧（Ln₂O₃）和亚氨基二乙酸（H₂IDA）按1:1:3的摩尔比进行水热反应生成了{[LnCr(IDA)₂(C₂O₄)]}ₙ（Ln = Eu，1；Sm，2），它们代表了首例三维3d-4f互穿配位聚合物。在该反应中，H₂IDA配体部分分解为草酸根阴离子（ox），草酸根阴离子连接Ln(III)离子形成一维{Ln(ox)}ₙ链。每个Cr(III)离子由两个IDA配体三齿配位，这两个IDA配体作为四齿金属配体连接{Ln(ox)}ₙ链形成三维开放网络。这两个开放网络相互贯穿形成无孔产物。1和2分别在高达327℃和360℃时热稳定。两种配合物均表现出正常的顺磁行为。发光结果表明从Ln(III)到Cr(III)的能量转移很强。
