01717nas a2200301 4500008004100000245002700041210002700068260000800095300001800103490000800121520093500129100002001064700002001084700002101104700002201125700002001147700001501167700001801182700002001200700002001220700001901240700001601259700001901275700002101294700002101315700001801336856006101354 2009 eng d00aPolymeric ladderphanes0 aPolymeric ladderphanes cAUG a12579–125850 v1313 a
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.
1 aChou, Chih-Ming1 aLee, Shern-Long1 aChen, Chih-Hsien1 aBiju, Akkattu, T.1 aWang, Hsian-Wen1 aWu, Yi-Lin1 aZhang, Guo-Fu1 aYang, Kuang-Wei1 aLim, Tsong-Shin1 aHuang, Min-Jie1 aTsai, Po-Yu1 aLin, Kin-Chuan1 aHuang, Shou-Ling1 aChen, Chun-hsien1 aLuh, Tien-Yau uhttp://library.ncl.res.in/content/polymeric-ladderphanes