title: Synthesis and photophysical properties of carbazole-based blue light-emitting dendrimers.
abstract: A new class of highly fluorescent and stable carbazole-based dendrimers (1-5) that contain the ethynylbenzene and diethynylbenzene cores has been synthesized and characterized. They show very high extinction coefficients of absorption (A(max) approximately 328-353 nm) and high quantum yields of fluorescence (lambda(max) approximately 386-437 nm; Phi(F) approximately 0.72-0.89; tau(F) approximately 2.09-3.91 ns) in dichloromethane. The quantum yields of fluorescence of 1-5 in the solid state are equally high (lambda(max) approximately 385-422 nm; Phi(F) approximately 0.40-0.85). These data indicate their potential use as blue-emitting materials in organic light-emitting diodes (OLEDs).
authors.affiliation: Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, USA.
authors.forename: Ravi M
authors.initials: RM
authors.lastname: Adhikari
authors.forename: Rajib
authors.initials: R
authors.lastname: Mondal
authors.forename: Bipin K
authors.initials: BK
authors.lastname: Shah
authors.forename: Douglas C
authors.initials: DC
authors.lastname: Neckers