Group 4 metallocene derivatives as a new class of singlet oxygen photosensitizers
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F22%3A00547509" target="_blank" >RIV/61388955:_____/22:00547509 - isvavai.cz</a>
Alternative codes found
RIV/61388980:_____/22:00547509
Result on the web
<a href="http://hdl.handle.net/11104/0323721" target="_blank" >http://hdl.handle.net/11104/0323721</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jphotochem.2021.113619" target="_blank" >10.1016/j.jphotochem.2021.113619</a>
Alternative languages
Result language
angličtina
Original language name
Group 4 metallocene derivatives as a new class of singlet oxygen photosensitizers
Original language description
Photosensitizers, which produce singlet oxygen O2(1Δg) under light irradiation, have attracted much attention due to their application potential in medicine and material science. In this respect, we recently reported on cationic metallocene complexes with pendant N-donor moieties, which exhibited enhanced luminescence in the solid-state originating from their triplet states with luminescence quantum yields, ΦL, up to approximately 0.52, unprecedented for this class of compounds. This finding suggested that these complexes can be efficient singlet oxygen photosensitizers. Herein, we evaluate the photogeneration of O2(1Δg) by several Ti, Zr and Hf metallocenes in dichloromethane solution, including recently described cationic derivatives. After excitation by UV A light, cationic Zr and Hf metallocenes stabilized by N-donor imine and pyridine moieties exhibited green, yellow or orange luminescence from long-lived 3LMCT excited states (ΦL ∼ 0.02 – 0.40 in argon-saturated solutions) and efficient O2(1Δg) production (ΦΔ ∼ 0.29 – 0.77 in air-saturated solutions). In contrast, parent neutral Zr complexes and cationic Ti derivatives with enhanced absorption of visible light, exhibited lesser ability to produce O2(1Δg) (ΦΔ < 0.10), similar to Zr and Ti metallocene dihalogenides. The experimentally established spectroscopic and photophysical behavior was probed computationally at the TD-DFT level.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/GA19-00204S" target="_blank" >GA19-00204S: Complexes of electron-deficient transition metals with luminescent properties</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Photochemistry and Photobiology A-Chemistry
ISSN
1010-6030
e-ISSN
1873-2666
Volume of the periodical
424
Issue of the periodical within the volume
FEB 2022
Country of publishing house
CH - SWITZERLAND
Number of pages
10
Pages from-to
113619
UT code for WoS article
000718451600004
EID of the result in the Scopus database
2-s2.0-85118508141