title: Synthesis and photophysical properties of 1,2-diphenylindolizine derivatives: fluorescent blue-emitting materials for organic light-emitting device.
abstract: New blue-emitting materials based on 1,2-diphenylindolizine were designed and synthesized through a microwave-assisted Suzuki coupling reaction. The photophysical, electrochemical, and thermal properties of the 1,2-diphenylindolizine derivatives were investigated using UV-visible and fluorescence spectroscopy, cyclic voltammetry, thermogravimetric analysis, and differential scanning calorimetry. The 1,2-diphenylindolizine derivatives had band gaps of 3.1-3.4 eV and indicated proper emission of around 450 nm without significant difference between in solution and thin solid film. The indolizine derivatives show an enhanced thermal stability (∆Tm > 100 °C), compared with 1,2-diphenylindolizine. These results suggest the 1,2-diphenylindolizine derivatives are suitable for blue-emitting materials in organic light-emitting devices.
authors.affiliation: Graduate School of East-West Medical Science, Kyung Hee University, Gyeonggi-do, 449-701, Republic of Korea.
authors.forename: Yeong Ran
authors.initials: YR
authors.lastname: Song
authors.affiliation: Department of Chemistry, College of Life Science and Nanotechnology, Hannam University, Daejeon, 305-811, Republic of Korea.
authors.forename: Choon Woo
authors.identifier: http://orcid.org/0000-0003-3758-3687
authors.initials: CW
authors.lastname: Lim
authors.affiliation: Graduate School of East-West Medical Science, Kyung Hee University, Gyeonggi-do, 449-701, Republic of Korea.
authors.forename: Tae Woo
authors.initials: TW
authors.lastname: Kim
mesh_terms: D005453:Fluorescence; D007212:Indolizines / Q000138:chemical synthesis* / Q000737:chemistry*; D015394:Molecular Structure; D055668:Photochemical Processes
chemical_list: D007212:Indolizines
keywords: OLED; fluorescent blue-emitting material; indolizine derivatives; microwave-assisted Suzuki coupling reaction