title: Synthesis of Dendritic Oligo-Spiro(fluorene-9,9'-xanthene) Derivatives with Carbazole and Fluorene Pendants and their Thermal, Optical, and Electroluminescent Properties.
abstract: Two novel spiro-configured ter(arylene-ethynylene) derivatives, TSF-Cz and TSF-F, have been designed and synthesized using spiro(fluorene-9,9'-xanthene) (SFX) as building blocks, introducing a hole-transporting carbazole and a fluorene chromophore as the peripheral functional group into the backbone through an oxygen atom. The two well-defined oligomers possess good solubility, film-forming quality, and high T(g) 's at 140 and 126 °C, respectively. In addition, these oligomers exhibit blue photoluminescence (PL) emission both in solution and solid states. The double-layered devices fabricated using the two materials as the emitter show a sky-blue emission with a brightness and a current efficiency of 7 613 cd · m(-2) and 1.11 cd · A(-1) for TSF-Cz, and 1 507 cd · m(-2) and 0.36 cd · A(-1) for TSF-F, respectively.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
authors.forename: Zengze
authors.initials: Z
authors.lastname: Chu
authors.forename: Dan
authors.initials: D
authors.lastname: Wang
authors.forename: Chao
authors.initials: C
authors.lastname: Zhang
authors.forename: Xing
authors.initials: X
authors.lastname: Fan
authors.forename: Yanwei
authors.initials: Y
authors.lastname: Tang
authors.forename: Lin
authors.initials: L
authors.lastname: Chen
authors.forename: Dechun
authors.initials: D
authors.lastname: Zou