Design and Photophysical Properties of Zinc(II) Porphyrin-Containing Dendrons Linked to a Central Artificial Special Pair
作者:Frédérique Brégier、Shawkat M. Aly、Claude P. Gros、Jean-Michel Barbe、Yoann Rousselin、Pierre D. Harvey
DOI:10.1002/chem.201101832
日期:2011.12.16
act as singlet and triplet energy acceptors or donors, depending on the dendrimeric systems. The presence of the paramagnetic d9 copper(II) in the dendrimers promotes singlet–triplet energy transfer from the zinc(II) tetra‐meso‐arylporphyrin to the bis(copper(II) porphyrin) unit and slow triplet–triplet energy transfer from the central bis(copper(II) porphyrin) fragment to the peripheral zinc(II)
点击化学的合成和光物理性质,特别是一系列人造特殊对-树枝状体系(树枝状= G1,G2,G3;G x =锌(II))的中心核与周围发色团之间的光诱导能量和电子转移据报道,在二甲基黄嘌呤双(金属(II)卟啉)(金属=锌,铜)的中心核上构建了含四-内消旋-芳基卟啉的聚酰亚胺)。根据树状体系,树状体充当单线态和三线态能量受体或供体。顺磁性d的存在9铜(II)在树枝状聚合物促进了从锌(II)四-单线态-三线态能量传递的内消旋-芳基卟啉转移到双(铜(II)卟啉)单元,并且三重态-三重态能量从中心双(铜(II)卟啉)片段转移到周围的锌(II)四内消旋-芳基卟啉。如果以bis(锌(II)卟啉)为中心核,则观察到链折叠的证据;异双金属系统中三重态-三重态能量传递的存在清楚地证明了这一点,该过程只能在短距离内发生。