Abstract
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.
Original language | English |
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Pages (from-to) | 206-215 |
Number of pages | 10 |
Journal | Journal of Inorganic and Organometallic Polymers and Materials |
Volume | 23 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jan 2013 |
Scopus Subject Areas
- Polymers and Plastics
- Materials Chemistry
User-Defined Keywords
- Acetylide
- Dibenzothiophene
- Photoluminescence
- Platinum
- Sulfone