Computational Study of Photochemical Relaxation Pathways of Platinum(II) Complexes
| Autor: | Yihan Tang, Fei Wang, Na Shu, Jiawei Xu, Yunlong Shang, Rongji Zhu, Pu Yang, Xi Chen, Yichen Wang |
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| Rok vydání: | 2021 |
| Předmět: |
Photosensitizing Agents
Quenching (fluorescence) Singlet Oxygen Singlet oxygen Internal conversion (chemistry) Photochemistry chemistry.chemical_compound Intersystem crossing Energy Transfer Photochemotherapy Triplet oxygen chemistry Excited state Photosensitizer Physical and Theoretical Chemistry Phosphorescence Platinum |
| Zdroj: | The Journal of Physical Chemistry A. 125:10144-10154 |
| ISSN: | 1520-5215 1089-5639 |
| DOI: | 10.1021/acs.jpca.1c07017 |
| Popis: | A series of functional platinum(II) complexes (Pt1-Pt3), which present high activity in four-photon absorption, in vivo imaging, and precise cancer therapy, as previously reported by the experimental work of Zhang et al. (Inorg. Chem.2021, 60, 2362-2371), are computationally investigated in the article. We find that after the complex goes through four-photon absorption to the S1 state, it undergoes intersystem crossing to the T2 state and eventually reaches the T1 state through internal conversion. On the T1 state, both radiative and nonradiative decay to S0 exit. The radiative decay forms the basis for the phosphorescence imaging in tissues as reported in the original paper. In addition, the nonradiative decay can simultaneously generate cytotoxic singlet oxygen by the excited energy transfer process, also known as triplet oxygen's quenching of triplet states. We conclude that the phosphorescence property as well as the photosensitizer character jointly bring high activity of in vivo imaging and photodynamic therapy to these complexes. |
| Databáze: | OpenAIRE |
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