Wu, Zhu; Nitsch, Joern; Schuster, Julia; Friedrich, Alexandra; Edkins, Katharina; Loebnitz, Marcel; Dinkelbach, Fabian; Stepanenko, Vladimir; Wuerthner, Frank; Marian, Christel M.; Ji, Lei; Marder, Todd B. published the artcile< Persistent Room Temperature Phosphorescence from Triarylboranes: A Combined Experimental and Theoretical Study>, Recommanded Product: 2,4,6-Trimethylbromobenzene, the main research area is triarylborane mol structure phosphorescence room temperature DFT; AIE; El-Sayed’s rule; RTP; boron; non-radiative transition.
Achieving highly efficient phosphorescence in purely organic luminophors at room temperature remains a major challenge due to slow intersystem crossing (ISC) rates in combination with effective non-radiative processes in those systems. Most room temperature phosphorescent (RTP) organic materials have O- or N-lone pairs leading to low lying (n, π*) and (π, π*) excited states which accelerate kisc through El-Sayed’s rule. Herein, it is reported the first persistent RTP with lifetimes up to 0.5 s from simple triarylboranes which have no lone pairs. RTP is only observed in the crystalline state and in highly doped PMMA films which are indicative of aggregation induced emission (AIE). Detailed crystal structure anal. suggested that intermol. interactions are important for efficient RTP. Furthermore, photophys. studies of the isolated mols. in a frozen glass, in combination with DFT/MRCI calculations, show that (σ, B p)→(π, B p) transitions accelerate the ISC process. This work provides a new approach for the design of RTP materials without (n, π*) transitions.
Angewandte Chemie, International Edition published new progress about Crystal structure. 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Recommanded Product: 2,4,6-Trimethylbromobenzene.
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary