Antenna-functionalized dendritic beta-diketonates and europium complexes: synthetic approaches to generation growth

作者：Li Shangfeng; Zhu Weihong^*; Xu Zhongyu; Pan Hanfeng; Tian He

来源：Tetrahedron, 2006, 62(21): 5035-5048.

DOI：10.1016/j.tet.2006.03.052

• europium complexes
• dendrimers
• synthesis

Six dendritic beta-diketonates and their corresponding europium complexes were synthesized. These dendritic beta-diketonate ligands consist of diberizoylmethane cores, Frechet-type poly(aryl ether) dendrons, and the carbazole-grafted peripheral functional groups. The designs of dendrimers are on the basis of high light-harvesting capability and dendron functionalization in virtue of the high extinction coefficient and carrier-injection adjustment of carbazole units. Different approaches to generation growth were utilized: the first generation europium complexes through etheral connectivity were developed via convergent synthetic approach; the second and third generation dendrons through esteral connectivity were developed by a hyperbranch core approach containing the advantages of convergent and divergent approaches. Their chemical structures were well characterized. Preliminary results show that the dendron-functionalized carbazole units not only tune the carrier-transporting capability, but also exhibit strong light-harvesting potential, resulting in a strong intense emission from the central Eu(III) ion via sensitization.

• 出版日期2006-5-22
• 单位东华大学