Pyrene-cored blue-light emitting [4]helicenes: synthesis, crystal structures, and photophysical properties

• DOI: 10.1039/c3ob27320b
• Publication Date: 2013-01-23T12:34:11Z
• Authors: Jian-Yong Hu; Arjun Paudel; Nobuyuki Seto; Xing Feng; Masanao Era; Taisuke Matsumoto; Junji Tanaka; Mark R. J. Elsegood; Carl Redshaw; Takehiko Yamato
• Keywords: Helicene; Crystal (programming language); Proton NMR

The synthesis, crystal structures and photophysical properties of two types pyrene-cored blue-light emitting [4]helicenes (7 9) are reported. chemical all synthesized compounds were fully confirmed by 1H 13C NMR spectra, mass spectroscopy as well elemental analysis. Single-crystal X-ray analysis these revealed that there laterally naphthalene annulated helical architectures, which clearly influenced different R substituents. the investigated in both solutions films, along with pre-cyclization products, 4,9- 4,10-bis(phenylethenyl)pyrenes (6 8). Notable optical features obtained compounds, make them promising candidates for several important applications modern electronic optoelectronic devices, such blue emitters organic light-emitting devices (OLEDs), or models further exploring development a new generation materials based on pyrene.