Dual Emissive Multinuclear Iridium(Iii) Complexes In Solutions: Linear Photophysical Properties, Two-Photon Absorption Spectra, And Photostability

Abstract

Linear steady-state and time-resolved spectroscopic properties, degenerate two-photon absorption (2PA) spectra, and photochemical stability of IrIII complexes TCQ[IrIII(ppz)2]n, (TCQ = tricycloquinazoline; ppz = 1-phenylpyrazole; n = 1 (1), n = 2 (2), and n = 3 (3)) are presented for liquid solutions. The analysis of the linear photophysical properties revealed the nature of the observed dual-component fluorescence-phosphorescence emission of 1-3 at room temperature. The values of 2PA cross sections were determined by open aperture Z-scans using a 1 kHz femtosecond laser system. The specific dependence of the 2PA efficiency on the number of ppz ligand units in 1-3 was determined. The quantum yields, Φph, for photochemical decomposition of TCQ[IrIII(ppz)2]n complexes were obtained for the first time using the absorption method [Corredor, C. C.; J. Photoch. Photobio. A 2006, 184,

Publication Date

3-29-2018

Publication Title

Journal of Physical Chemistry C

Volume

122

Issue

12

Number of Pages

6786-6793

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/acs.jpcc.7b12623

Socpus ID

85044750043 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85044750043

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