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A simple synthetic route for the efficient preparation and purification of two regioisomers of a pyrene derivative containing two ethynyl groups―1,6‐ and 1,8‐bis(ethynyl)pyrene―is described. The former compound was used as a building block for the stepwise synthesis of a highly conjugated, ditopic bis(2,2'‐bipyridine) ligand (2) containing the pyrene nucleus at the central core. The fluorescence properties of ligand 2 are reported. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
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Leroy‐Lhez et al. (2005) studied this question.
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