An oxygen-sensitive cyclometalated platinum(II) complex with a triphenylamine modified acetylacetone derivative

[Display omitted] A cyclometalated Pt(II) complex [Pt(ppy)(TPA-dpa)] Pt2 with a triphenylamine (TPA) substituted diphenyl-1,3-propanedionate (dpa) as auxiliary ligand was designed and synthesized. The effects of the TPA moiety on the photophysical, electrochemical and oxygen sensing properties of th...

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Published inTetrahedron letters Vol. 119; pp. 154427 - 154431
Main Authors Yan, Yingying, Yu, Zhenni, Wang, Junan, Liu, Chun
Format Journal Article
LanguageEnglish
Published OXFORD Elsevier Ltd 12.04.2023
Elsevier
Subjects
Chemistry
Chemistry, Organic
Cyclometalated platinum(II) complex
Optical sensor
Oxygen sensitivity
Physical Sciences
Reversibility
Science & Technology
Triphenylamine
Optical sensor
Reversibility
Oxygen sensitivity
Triphenylamine
Cyclometalated platinum(II) complex
DESIGN
STATE PROPERTIES
EMITTERS
MOLECULAR-OXYGEN
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Summary:[Display omitted] A cyclometalated Pt(II) complex [Pt(ppy)(TPA-dpa)] Pt2 with a triphenylamine (TPA) substituted diphenyl-1,3-propanedionate (dpa) as auxiliary ligand was designed and synthesized. The effects of the TPA moiety on the photophysical, electrochemical and oxygen sensing properties of the corresponding Pt(II) complex were systematically investigated compared with non-TPA-modified complexes [Pt(ppy)(dpa)] Pt1 and Pt(ppy)(acac). The maximum emission wavelength of Pt2 exhibits a notable redshift (71 nm) with respect to Pt(ppy)(acac). More importantly, the lifetime (25.52 µs) of Pt2 is significantly prolonged compared with those of Pt1 (0.32 µs) and Pt(ppy)(acac) (2.60 µs). Pt2 is highly sensitive to molecular oxygen when immobilized in an ethyl cellulose film. In addition, the oxygen sensing films have excellent reversibility during the quenching and recovering processes.
ISSN:0040-4039
1873-3581
DOI:10.1016/j.tetlet.2023.154427