Department of Chemistry
Synthesis, characterization and photophysical properties of metallopolyynes and metallodiynes of platinum(II) with dibenzothiophene derivatives
Soluble, thermally stable, and easily processable platinum(II) polyyne polymers of the form trans-[-Pt(PBu3)2C≡CRC≡C-]n (R = 2,8-disubstituted dibenzothiophene, 2,8-disubstituted and 3,7-disubstituted dibenzothiophene-S,S-dioxide units) have been prepared in good yields by CuI-catalyzed polymerization involving the dehydrohalogenating coupling of trans-[PtCl2(PBu3)2] and HC≡CRC≡CH. We report their optical absorption and photoluminescence spectra and compare the results with the monomeric model complexes trans-[Pt(Ph)(PEt3)2C≡CRC≡CPt(Ph)(PEt3)2]. The different electronic properties and linkage geometry of the central R group lead to new organometallic materials with distinct photophysical traits. The polymer with more conjugated 3,7-disubstituted dibenzothiophene-S,S-dioxide mainly displays fluorescence band, while its isomer with less conjugated 2,8-disubstituted spacer effectively enhances the intersystem crossing rate and strong phosphorescence emission can be detected even at room temperature. © 2012 Springer Science+Business Media New York.
Acetylide, Dibenzothiophene, Photoluminescence, Platinum, Sulfone
Source Publication Title
Journal of Inorganic and Organometallic Polymers and Materials
Link to Publisher's Edition
Ho, C., Poon, S., Lo, P., Wong, M., & Wong, W. (2013). Synthesis, characterization and photophysical properties of metallopolyynes and metallodiynes of platinum(II) with dibenzothiophene derivatives. Journal of Inorganic and Organometallic Polymers and Materials, 23 (1), 206-215. https://doi.org/10.1007/s10904-012-9761-1