作者:Chih-Ming Chou、Shern-Long Lee、Chih-Hsien Chen、Akkattu Thankappan Biju、Hsian-Wen Wang、Yi-Lin Wu、Guo-Fu Zhang、Kuang-Wei Yang、Tsong-Shin Lim、Min-Jie Huang、Po-Yu Tsai、Kin-Chuan Lin、Shou-Ling Huang、Chun-hsien Chen、Tien-Yau Luh                                    
                                    
                                        DOI:10.1021/ja9035362
                                    
                                    
                                        日期:2009.9.9
                                    
                                    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, Sorel 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.