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首页> 外文期刊>Chemistry: A European journal >Coherently Aligned Porphyrin-Appended Polynorbornenes
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Coherently Aligned Porphyrin-Appended Polynorbornenes

机译：相干排列的卟啉附加聚降冰片烯

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摘要

Six different kinds of coherently aligned porphyrin-appended polynorbornenes derived from 5,6-endofused N-arylpyrrolidenonorbornenes have been synthesized. p–p interactions between the pendant groups are essential for dictating the photophysical properties of the polymers and the mechanism for the stereoselective formation of polymers. Splitting of the Soret band of polymers 2a–c, which have alkyl-substituted porphyrin pen- ACHTUNGTRENUNGdant groups, suggests strong exciton coupling between chromophores. No splitting of the Soret band is observed for polymers 2d–f, which have tetraaryl substituents on the porphyrin moiety. Significant fluorescence quenching is found in polymers 2a–e, whereas only slightly reduced quantum yield is observed for 2 f. Time-resolved fluorescence measurements also indicate a similar trend. The AFM image of 2d on graphite shows aggregation to form a two-dimensional, ordered pattern.
机译：合成了从5，6-内吞的N-芳基吡咯烷腺苷降冰片烯衍生的六种不同类型的连贯排列的卟啉加聚降冰片烯。侧基之间的p–p相互作用对于决定聚合物的光物理性质以及聚合物的立体选择形成机理至关重要。具有烷基取代的卟啉笔-ACHTUNGTRENUNGdant基团的聚合物2a–c的Soret带的分裂表明发色团之间的强激子耦合。对于聚合物2d–f，在卟啉部分具有四芳基取代基的聚合物，未观察到Soret带的分裂。在聚合物2a-e中发现了明显的荧光猝灭，而在2f中仅观察到量子产率略有降低。时间分辨的荧光测量结果也表明了类似的趋势。石墨上的2d的AFM图像显示聚集，形成二维有序图案。

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