First Perphenylated carbo‐Oligoacetylenes: An Extension of the Polytriacetylene Family |
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| Authors: | Dr Arnaud Rives Dr Valérie Maraval Dr Nathalie Saffon‐Merceron Prof Remi Chauvin |
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| Institution: | 1. CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne, 31077 Toulouse (France), Fax: (+33)?5‐61‐55‐30‐03;2. Université de Toulouse, UPS, INPT, LCC, 31077 Toulouse (France);3. Université de Toulouse, UPS, Institut de Chimie de Toulouse, ICT‐FR 2599, 118, route de Narbonne, 31062 Toulouse (France) |
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| Abstract: | The first examples of a novel family of sp‐carbon‐rich n‐π‐conjugated oligomers/polymers, namely carbo‐mers of polyacetylene, also referred to as “1,4‐PTA” isomers of the classical polytriacetylenes (1,2‐PTAs), are described in the perphenylated series. The two first representatives proved to be stable in solution, and exhibit a zig‐zag arrangement in the crystal state. The third member of the family, isolated in SnCl2 matrix, proved to be stable in the solid state and was characterized by MALDI‐TOF MS, 1H NMR, CPMAS 13C NMR, and absorption spectroscopy. An explanation for its reactivity in solution is proposed. The chromophoric properties in the visible region are shown to vary significantly and consistently along the series. |
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| Keywords: | alkynes chromophores conjugation polymers solid‐state structures |
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