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


Lázaro, 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; Rodríguez, Laura (2020). Room-Temperature Phosphorescence and Efficient Singlet Oxygen Production by Cyclometalated Pt(II) Complexes with Aromatic Alkynyl Ligands. Inorganic Chemistry, 59 (12), 8220-8230. DOI: 10.1021/acs.inorgchem.0c00577


JYU authors or editors


Publication details

All authors or editors: Lázaro, 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 series: Inorganic Chemistry

ISSN: 0020-1669

eISSN: 1520-510X

Publication year: 2020

Volume: 59

Issue number: 12

Pages range: 8220-8230

Publisher: American Chemical Society

Publication country: United States

Publication language: English

DOI: http://doi.org/10.1021/acs.inorgchem.0c00577

Open Access: Publication channel is not openly available


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.


Keywords: organometallic compounds; coordination complexes; luminescence; oxygen


Contributing organizations


Ministry reporting: Yes

Reporting Year: 2020


Last updated on 2020-09-07 at 23:08