Five kinds of poly(phenylene vinylene) (PPV) derivatives with different alkoxyl substituents were synthesized with optimized synthesis procedures. The optimized PPV derivatives are reacted at 80• C for 6 h after mixing of the reactants at 45• C, and then followed by aging at 95• C for 1 h. The optimized molar ratios of dichlorobenzyl chloride/potassium tert-butoxide for poly(2-methoxy-5-butoxy)-p-phenylene vinylene and poly(2,5-dibutyloxy)-1,4-phenylene vinylene are 1/7 and 1/8, respectively. The yields of the derivatives increased gradually with the chain length of the substituents; however, the yields decreased with a further increase in the chain length to an eight-carbon substituent, which is resulted from the counteraction of the electronic effect by the steric effect of the substituents. The solubility of the derivatives was greatly
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