A1 Journal article (refereed)
Room-Temperature Phosphorescence and Efficient Singlet Oxygen Production by Cyclometalated Pt(II) Complexes with Aromatic Alkynyl Ligands (2020)


Lázaro, A., Cunha, C., Bosque, R., Pina, J., Ward, J. S., Truong, K.-N., Rissanen, K., Lima, J. C., Crespo, M., Seixas de Melo, J. S., & Rodríguez, L. (2020). Room-Temperature Phosphorescence and Efficient Singlet Oxygen Production by Cyclometalated Pt(II) Complexes with Aromatic Alkynyl Ligands. Inorganic Chemistry, 59(12), 8220-8230. https://doi.org/10.1021/acs.inorgchem.0c00577


JYU authors or editors


Publication details

All authors or editorsLázaro, Ariadna; Cunha, Carla; Bosque, Ramon; Pina, João; Ward, Jas S.; Truong, Khai-Nghi; Rissanen, Kari; Lima, João Carlos; Crespo, Margarita; Seixas de Melo, J. Sérgio; et al.

Journal or seriesInorganic Chemistry

ISSN0020-1669

eISSN1520-510X

Publication year2020

Volume59

Issue number12

Pages range8220-8230

PublisherAmerican Chemical Society

Publication countryUnited States

Publication languageEnglish

DOIhttps://doi.org/10.1021/acs.inorgchem.0c00577

Publication open accessNot open

Publication channel open access

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/73375


Abstract

The synthesis of five novel cyclometalated platinum(II) compounds containing five different alkynyl-chromophores was achieved by the reaction of the previously synthesized Pt–Cl cyclometalated compound (1) with the corresponding RC≡CH by a Sonogashira reaction. It was observed that the spectral and photophysical characteristics of the cyclometalated platinum(II) complexes (Pt–Ar) are essentially associated with the platinum-cyclometalated unit. Room-temperature emission of the Pt–Ar complexes was attributed to phosphorescence in agreement with DFT calculations. Broad nanosecond (ns)-transient absorption spectra were observed with decays approximately identical to those obtained from the emission of the triplet state. From the femtosecond-transient absorption (fs-TA) data, two main excited-state decay components were identified: one in the order of a few picoseconds was assigned to fast intersystem crossing to populate the triplet excited-state and the second (hundreds of ns) was associated with the decay of the transient triplet state. In general, efficient singlet oxygen photosensitization quantum yields were observed from the triplet state of these complexes.


Keywordsorganometallic compoundscoordination complexesluminescenceoxygen


Contributing organizations


Ministry reportingYes

Reporting Year2020

JUFO rating2


Last updated on 2024-22-04 at 12:14