Synthesis, characterization, and optical properties of poly[2-(4-(2,2′-bithiophen-5-yl)phenyl)-4-(4-alkoxyphenyl)-6-phenylpyridine]s

Abstract

Two new copolymers, P 1 and P 2 , composed of 4[4-(alkoxy)phenyl]-2, 6-bis(4-bromophenyl)pyridine and bithiophene units, have been synthesized via Suzuki cross-coupling reactions. 4[4-(alkoxy)phenyl]-2, 6-bis(4-bromophenyl)pyridines were synthesized starting from condensation reaction of 4-bromoacetophenone and 4-hydroxy benzaldehyde, and subsequent alkoxylation of hydroxyl groups. All of the polymers and intermediates were characterized using FTIR and NMR spectroscopies. The synthesized polymers exhibit good solubility in common organic solvents. The maximum absorption peak for P 1 and P 2 was 430 and 420 nm, respectively. The optical band gap energy of the polymers was determined by absorption onset and found to be 2.17 eV for P 1 and 2.13 eV for P 2 .

Structure and properties of a compatible starch‐PCL composite using p‐phthaloyl chloride‐based prepolymer

“…It can be seen that weak peaks appeared within the range of 7.9 to 8.3 ppm of the 1 H NMR curve for the PCP relative to the spectra of the PCL diol. The peaks were ascribed to the characteristic absorption peaks of H for the benzene ring . This proved that the PCL diol reacted with the p ‐phthaloyl chloride successfully.…”

Synthesis, characterization, and optical properties of new pyridine- and thiophene-based copolymer bearing bulky naphthyl group

“…One type is making a desired thiophenepyridine-containing monomer via coupling reactions and then its polymerization [30]. The other route is making pyridine-containing monomer via modified chichibabin pyridine synthesis and then its polymerization via coupling [31][32][33][34]. In continuation of our research on polymer synthesis and characterization, now we synthesized a pyridine-containing dibromo compound, 2,6-bis(4-bromophenyl)-4-(naphthalen-1-yl) pyridine, bearing naphthyl group which was polymerized with commercially available bithiophene containing diboronic ester via Suzuki coupling to afford thiophene-and pyridine-based polymer.…”

Regioregularity and deposition effect on the physical/chemical properties of polythiophene derivatives films

“…Morphology is another feature that can tune the electrical behavior of polymeric materials [14,15], and the deposition technique applied to fabricate thin films constitute a practical way of tuning the electrical response of a based-film device [16,17]. The P3ATs can be transferred onto a solid substrate making use of many techniques [18,19], among the options, Langmuir-Blodgett (LB) and Langmuir-Schaefer (LS) allow molecular assemblies of the materials [20], which can lead to the alignment of the film in a proper manner, thus enabling the construction of a customized device [21].…”