Dibenzothiophene-platinated complexes: probing the effect of ancillary ligands on the photophysical performance

Anastasia I. Solomatina, Irina O. Aleksandrova, Antti J. Karttunen*, Sergey P. Tunik, Igor O. Koshevoy

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)

Abstract

Cyclometalation of dibenzothienyl-pyridine (HPyDBT) afforded a series of platinum(ii) complexes Pt(PyDBT)(L)Cl (L = DMSO, 1; P(p-C6H4-X)3 (X = H, 2; CF3, 3; OMe, 4; NPh2, 5); 1,3,5-triaza-7-phosphaadamantane, 6; 2,6-dimethylphenyl isocyanide, 7). Chelating bidentate LL ligands formed cationic compounds [Pt(PyDBT)(LL)]+ (LL = 1,2-bis(diphenylphosphino)benzene, 8; 2,2′-bipyridine, 9; 1,10-phenanthroline, 10). Oxidation of a thienyl sulfur atom allowed for the isolation of the sulfone derivative Pt(PyDBT)(PPh3)Cl (11). The title complexes were characterized crystallographically (except 7). Investigation of their photophysical behavior revealed solid state phosphorescence with quantum yields up to 0.45 for neat powders. The ancillary ligands L show a minor influence on the emission energies of the neutral compounds, but affect dramatically the intensity of luminescence. In contrast, the cationic species with diimine ligands demonstrate a significant contribution of the LL fragments into the emissive T1 states that leads to a certain mixing of 3IL and 3LL′CT transitions and causes a substantial bathochromic shift of emission.

Original languageEnglish
Pages (from-to)3895-3905
Number of pages11
JournalDalton Transactions
Volume46
Issue number12
DOIs
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed

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  • Datasets

    CCDC 1529881: Experimental Crystal Structure Determination

    Aleksandrova, I. (Creator), Karttunen, A. (Creator), Koshevoy, I. O. (Contributor), Solomatina, A. I. (Contributor) & Tunik, S. P. (Contributor), Cambridge Crystallographic Data Centre , 1 Jan 2017

    Dataset

    CCDC 1529882: Experimental Crystal Structure Determination

    Aleksandrova, I. (Contributor), Karttunen, A. (Creator), Koshevoy, I. O. (Contributor), Solomatina, A. I. (Contributor) & Tunik, S. P. (Contributor), Cambridge Crystallographic Data Centre , 1 Jan 2017

    Dataset

    CCDC 1529883: Experimental Crystal Structure Determination

    Aleksandrova, I. (Creator), Karttunen, A. (Creator), Koshevoy, I. O. (Contributor), Solomatina, A. I. (Contributor) & Tunik, S. P. (Contributor), Cambridge Crystallographic Data Centre , 1 Jan 2017

    Dataset

    Equipment

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