Syntheses of poly(9,9-dialkylfluorene-2,7-vinylene)s (PFVs, alkyl = n-hexyl, n-octyl, 2'-ethylhexyl) and poly(N-alkylcarbazole-2,7-vinylene)s (PCVs, alkyl = n-octyl, 9'-heptadecanyl) by acyclic dime metathesis (ADMET) polymerization using Ru-carbene complexes have been explored. The polymerizations in the presence of Ru(CHPh)(Cl)(2)(IMesH(2))(PCy3) and Ru(CH-2-(OPr)-Pr-i-C6H4)(Cl)(2)(IMesH(2)) [Cy = cyclohexyl, IMesH(2)= 1,3-bis(2,4.6-trimethylphenyl)-2-imidazolidinylidene] afforded relatively high molecular weight PFVs, PCV (alkyl = 9'-heptadecanyl) with unimodal molecular weight distributions, and the olefinic double bonds in the resultant polymers possessed highly trans regularity in all cases. The resultant defect-free PFVs possessed higher absolute quantum yields (Phi=92-99%) than those reported previously, whereas no significant differences in the UV-vis and the fluorescent spectra (absorption bands, peak maxima) in the resultant PFVs were observed as an effect of alkyl side chain in the 9-position. The UV-vis and the fluorescence spectra in the PCV were similar to those in the PFVs, indicating that the replacement (from fluorene to carbazole) does not affect the observed spectra; the resultant PCV also possessed remarkable absolute quantum yield (Phi=86%).