π-Congested poly(paraphenylene) from 2,2′,6,6′-tetraphenyl-1,1′-biphenyl units: synthesis and structural characterization

文献情報

出版日 2013-03-25

DOI 10.1039/C3PY00166K

インパクトファクター 5.582

著者

Florian Schlütter, Tomohiko Nishiuchi, Volker Enkelmann, Klaus Müllen

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要旨

The synthesis of poly(paraphenylene)s (PPPs) bearing sterically π-congested 2,2′,6,6′-tetraphenyl-1,1′-biphenyl (1) units has been achieved for the first time. By enhancing the synthesis of 1, followed by its polymerization, we were able to compare the photophysical properties of the oligomeric and polymeric fractions with non-crowded PPPs. This revealed significant π-orbital interactions along the paraphenylene backbone of the π-congested systems together with through-space conjugation among the π-orbitals of the stacked peripheral phenyl rings, resulting in an increased effective conjugation length and a remarkable bathochromic shift in absorption.

掲載誌

Polymer Chemistry

CiteScore: 8.6

自己引用率: 7.3%

年間論文数: 457

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π-Congested poly(paraphenylene) from 2,2′,6,6′-tetraphenyl-1,1′-biphenyl units: synthesis and structural characterization

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