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The effect of the side chain chiral center position on the secondary structure of oligomers and polymers of N-substituted 4-aminobenzoic acid was studied. Monomer 1 was prepared from l-alanine methyl ester hydrochloride in seven steps. The poly(p-benzamide) having an α-substituted side chain at the nitrogen atom (α-Me-PA) was obtained from the polymerization of 1 with triethylsilane, CsF, and 18-crown-6...
Three dithienobenzimidazole derivative monomers (M1, M2, and M3) were prepared, where M3 was obtained by the oxidation of M1 and identified by the X-ray crystallographic analysis. π-Conjugated homopolymers (P1-0, P2-0, and P3-0) and copolymers (P1-2, P3-1, and P3-2) were synthesized by the palladium-catalyzed coupling polymerizations of M1, M2, and M3. The absorption spectra of the reference compounds...
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