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Smart use of “ping-pong” energy transfer to improve the two-photon photodynamic activity of an Ir(iii) complex

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Abstract

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.

Graphical abstract: Smart use of “ping-pong” energy transfer to improve the two-photon photodynamic activity of an Ir(iii) complex

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Article information


Submitted
16 Dec 2019
Accepted
28 Jan 2020
First published
29 Jan 2020

Chem. Commun., 2020, Advance Article
Article type
Communication

Smart use of “ping-pong” energy transfer to improve the two-photon photodynamic activity of an Ir(III) complex

Z. Jin, S. Qi, X. Guo, N. Tian, Y. Hou, C. Li, X. Wang and Q. Zhou, Chem. Commun., 2020, Advance Article , DOI: 10.1039/C9CC09763E

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