851192-60-4Relevant academic research and scientific papers
A platinum acetylide polymer with sterically demanding substituents: Effect of aggregation on the triplet excited state
Zhao, Xiaoming,Cardolaccia, Thomas,Farley, Richard T.,Abboud, Khalil A.,Schanze, Kirk S.
, p. 2619 - 2627 (2005)
The effect of interchain interaction on the triplet excited state is explored in two Pt-acetylide polymers of the type [-trans-Pt(PBu 3)2-C≡C-Ar-C≡C-]n, where Ar is either 1,4-phenylene or is based on the pentiptycene unit (polymers 2 and 3, respectively). To explore the effect of interchain interaction in Pt-acetylide materials, the optical properties of parent polymer 2 are compared with those of polymer 3 in which interchain interaction is precluded by the sterically bulky pentiptycene moiety. Insight into the effect of the pentiptycene unit on packing in the solid state comes from the X-ray structure of monomer 1b, Ph-C≡C-[trans-Pt(PBu3)2]-C≡C-Ar-C≡C- [trans-Pt(PBu3)2]-C≡C-Ph. Spectroscopic studies indicate that weak phosphorescence emission from an interchain aggregate is observed from parent polymer 2, both in solution and in the solid state. By contrast, the photophysics of 3 is dominated by the intrachain triplet exciton. Interestingly, the phosphorescence emission of polymer 3 in the solid state is nearly superimposable with that of a single crystal of monomer 1b, suggesting that the solid polymer experiences an environment that is similar to that of the monomer in the crystal.
