title: Polymeric ladderphanes.
abstract: A new class of polymers, which have a double-stranded polybinorbornene skeleton with multilayer planar oligoaryl linkers, defined as polymeric ladderphanes, are synthesized. The structures of these ladderphanes are determined by spectroscopic means. Photophysical studies and time-resolved fluorescence spectroscopic investigations reveal that there is a strong interaction between the chromophore linkers. Thus, Soret band splitting in the absorption spectrum of the polymer with porphyrin linker (12e), significant fluorescence quenching with oligoaryl linkers (12b-d), and excimer emission with a terphenylene-diethynylene linker (12a) are characteristic photophysical properties of these polymers. Scanning tunneling microscopy shows that polymers 12b and d exhibit a ladder-like morphology and form a supramolecular assembly leading to a two-dimensional ordered array on a highly oriented pyrolytic graphite surface.
authors: Department of Chemistry, National Taiwan University, Taipei, Taiwan 106.
authors: Chih-Ming
authors: CM
authors: Chou
authors: Shern-Long
authors: SL
authors: Lee
authors: Chih-Hsien
authors: CH
authors: Chen
authors: Akkattu Thankappan
authors: AT
authors: Biju
authors: Hsian-Wen
authors: HW
authors: Wang
authors: Yi-Lin
authors: YL
authors: Wu
authors: Guo-Fu
authors: GF
authors: Zhang
authors: Kuang-Wei
authors: KW
authors: Yang
authors: Tsong-Shin
authors: TS
authors: Lim
authors: Min-Jie
authors: MJ
authors: Huang
authors: Po-Yu
authors: PY
authors: Tsai
authors: Kin-Chuan
authors: KC
authors: Lin
authors: Shou-Ling
authors: SL
authors: Huang
authors: Chun-Hsien
authors: CH
authors: Chen
authors: Tien-Yau
authors: TY
authors: Luh