Smart use of "ping-pong" energy transfer to improve the two-photon photodynamic activity of an Ir(iii) complex
Smart use of "ping-pong" energy transfer to improve the two-photon photodynamic activity of an Ir(iii) complex
复制标题
巧妙利用“乒乓”能量转移来提高 Ir(iii) 配合物的双光子光动力活性
DOI：
10.1039/c9cc09763e
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发表时间：
2020
影响因子：
4.9
通讯作者：
Zhou Qianxiong
中科院分区：
文献类型：
--
作者：
Jin Zhihui;Qi Shuang;Guo Xusheng;Na Tian;Hou Yuanjun;Li Chao;Wang Xuesong;Zhou Qianxiong
首次在芘修饰的Ir（III）环化配合物中揭示了双光子激发的“乒乓”型能量转移过程。从4-（pyren-1-yl）-tpy（tpy-py）单元的单重激发态到Ir（III）部分，然后再次回到tpy-py单元的三重激发态的能量转移增强了双光子吸收截面和复合物的单重态氧量子产率，并显着增强了其体外和3D多细胞球体中的双光子光动力学活性。
A two-photon excited “Ping-Pong” type energy transfer process is for the first time disclosed in a pyrene-modified Ir(III) cyclometalated complex. The energy transfer, from the singlet excited state of the 4-(pyren-1-yl)-tpy (tpy-py) unit to the Ir(III) moiety and then back again to the triplet excited state of the tpy-py unit, enhances both the two-photon absorption cross sections and singlet oxygen quantum yield of the complex, and dramatically boosts its two-photon photodynamic activity both in vitro and in 3D multicellular spheroids.