title: Precise synthesis of end-functionalized oligo(2,5-dialkoxy-1,4-phenylene vinylene)s with controlled repeat units via combined olefin metathesis and Wittig-type coupling.
abstract: The precise synthesis of chemically, analytically pure oligo(2,5-dialkoxy-1,4-phenylene vinylene)s [OPVs, alkoxy = O(CH2)2OSi(i)Pr3] with strictly controlled repeat units (up to 15 repeat units) and well-defined end groups has been achieved by a combined olefin metathesis reaction of 2,5-dialkoxy-1,4-divinylbenzene or their derivatives with a molybdenum-alkylidene complex and the subsequent Wittig-type cleavage with their dicarboxaldehyde analogues. The effects of the repeat units and the end functional groups toward their UV-vis and the fluorescence spectra have been clearly demonstrated.
authors.affiliation: Department of Chemistry, Faculty of Science and Engineering, Tokyo Metropolitan University, 1-1 minami Osawa, Hachioji, Tokyo 192-0397, Japan.
authors.forename: Mohamed Mehawed
authors.initials: MM
authors.lastname: Abdellatif
authors.forename: Kotohiro
authors.initials: K
authors.lastname: Nomura