高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (8): 1753.doi: 10.7503/cjcu20140081

• 物理化学 • 上一篇    下一篇

一种具有长寿命三线态的锌卟啉-苝酰亚胺超分子的光物理过程

汪天洋1, 胡晓霞1, 孙海亚1, 郭建峰1, 刘东志1, 李巍1, 王丽昌2, 周雪琴1()   

  1. 1. 天津大学化工学院, 天津300072
    2. 美国南伊利诺伊州大学卡本代尔分校化学与生物化学系, 卡本代尔 IL 62901, 美国
  • 收稿日期:2014-01-23 出版日期:2014-08-10 发布日期:2019-08-01
  • 作者简介:联系人简介:周雪琴, 女, 博士, 副教授, 主要从事有机光敏染料的合成与性能研究. E-mail: zhouxueqin@tju.edu.cn

Photophysical Processes in a Novel Porphyrin-perylene Metallosupramolecule with a Long-lived Triplet State

WANG Tianyang1, HU Xiaoxia1, SUN Haiya1, GUO Jianfeng1, LIU Dongzhi1, LI Wei1, WANG Lichang2, ZHOU Xueqin1,*()   

  1. 1. School of Chemical Engineering, Tianjin University, Tianjin 300072, China
    2. Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale IL 62901, USA
  • Received:2014-01-23 Online:2014-08-10 Published:2019-08-01
  • Contact: ZHOU Xueqin E-mail:zhouxueqin@tju.edu.cn

摘要:

通过吡啶基与金属锌卟啉的配位作用, 合成了一种新型卟啉-苝酰亚胺超分子配合(TPPZn-BPHPDI), 通过核磁共振氢谱确认了超分子体系的形成. 采用荧光滴定方法测得锌卟啉与苝酰亚胺配位作用的平衡常数为5.32×104 L/mol. 纳秒瞬态荧光光谱和瞬态吸收光谱显示, 超分子体系内存在着从卟啉三线态向苝酰亚胺三线态的能量传递过程, 产生了寿命长达101 μs的苝酰亚胺三线态分子.

关键词: 卟啉, 苝酰亚胺, 超分子, 三线态, T-T能量转移

Abstract:

A new porphyrin-perylene supramolecule, TPPZn-BPHPDI, was obtained by axial coordination of N-pyridyl-N-(1-hexyl)heptylperylene-3,4,9,10-tetracarboximides(BPHPDI) to the zinc ion center of porphyrin metallacycle(TPPZn). The supramolecular system was confirmed by 1H NMR and 1H-1H COSY spectra. The fluorescence titration experiments show that the equilibrium constant of the coordination reaction is 5.32×104 L/mol. The analysis of transient nanosecond fluorescence spectra and transient absorption spectra indicates that a long-lived perylene triplet state(101 μs) can form via triplet-triplet energy transfer from the porphyrin to the perylene moiety. Moreover, all above photophysical processes are shown very clearly by means of the energy-level diagram in the paper.

Key words: Porphyrin, Perylene, Supramolecule, Triplet state, T-T energy transfer

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