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Strategic Design of Luminescent Rhenium(I), Ruthenium(II), and Iridium(III) Complexes as Activity-Based Probes for Bioimaging and Biosensing

Lawrence Cho-Cheung Lee, Kenneth Kam-Wing Lo*

*Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

99 Downloads (CityUHK Scholars)

Abstract

The rapid development of responsive fluorescent probes has advanced optical imaging for biological research and biomedical applications. Among different sensing strategies, activity-based sensing, which exploits the unique reactivity of the target chemical species to achieve high chemoselectivity, has emerged as a promising paradigm for the development of responsive probes for selective molecular imaging. Luminescent transition metal complexes have received considerable attention for bioimaging and biosensing applications over the last decade due to their remarkable photophysical behavior including intense emission with large Stokes’ shifts, long emission lifetimes, strong two-photon absorption, and high photostability. In this Review, we summarize the design strategies and applications of luminescent complexes of rhenium(I), ruthenium(II), and iridium(III) polypyridines as activity-based probes for the detection of various chemical species and bioactive molecules in live cells and organisms. The current challenges and future prospects of these complexes as activatable reagents for disease diagnosis and treatment are also discussed.
Original languageEnglish
Article numbere202200840
JournalChemistry—An Asian Journal
Volume17
Issue number22
Online published21 Sept 2022
DOIs
Publication statusPublished - 16 Nov 2022

Funding

We thank the Hong Kong Research Grants Council (Project No. CityU 11300019, CityU 11302820, CityU 11301121, T42-103/16- N, C6014-20W, C7075-21GF, and N_CityU104/21) for financial support. We also acknowledge the funding support from “Laboratory for Synthetic Chemistry and Chemical Biology” under the Health@InnoHK Program launched by Innovation and Technology Commission, The Government of Hong Kong SAR, P. R. China.

Research Keywords

  • activity-based sensing
  • biosensors
  • diagnostics
  • imaging agents
  • luminescence
  • phosphorogenic
  • transition metal complexes

Publisher's Copyright Statement

  • COPYRIGHT TERMS OF DEPOSITED POSTPRINT FILE: This is the peer reviewed version of the following article: Lee, L. C-C., & Lo, K. K-W. (2022). Strategic Design of Luminescent Rhenium(I), Ruthenium(II), and Iridium(III) Complexes as Activity-Based Probes for Bioimaging and Biosensing. Chemistry—An Asian Journal, 17(22), [e202200840], which has been published in final form at https://doi.org/10.1002/asia.202200840.
  • This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

RGC Funding Information

  • RGC-funded

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