Assembly of a Supramolecular Architecture Based on Keggin POMs and Lanthanide Coordination Cations

作者：Pang Hai Jun; Zhang Chun Jing; Chen Ya Guang^*; Hu Mi Xia; Li Jia

来源：Journal of Cluster Science, 2008, 19(4): 631-640.

DOI：10.1007/s10876-008-0209-2

• Polyoxometalates
• Lanthanide
• Keggin anion
• Chiral layer

Two new compounds based on Keggin polyoxometalates (POMs) [SiW(12)O(40)](4-) (SiW(12)), [Na(H(2)O)(3)(H(2)L)SiW(12)O(40)](H(2)L)(2) 6H(2)O (1), and [Ce(H(2)O)(3)(HL)(2)(H(2)L)](2)[SiW(12)O(40)](2) 10H(2)O (2) (HL = C(6)H(5)NO(2) = isonicotinic acid), have been conventionally synthesized and characterized by routine methods. Compound 1 possesses a 1D right-handed helical structure constructed by SiW(12)O(40) (4-) {SiW(12)} and [Na(H(2)O)(3)(HL)] complexes. Interestingly, these right-handed helical chains are linked together via H-bonds forming a novel chiral layer. By using the similar synthesis method to that for compound 1, except for employing Ce(3+) cations in instead of La(3+) cations, a 3D supramolecular compound 2 based on SiW(12) and Ce(3+) coordination cations has been obtained, which contains 1D channels along a axis. Additionally, the luminescence properties of 2 were studied.

• 出版日期2008-12
• 单位东北师范大学