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

Abstract

A new copolymer was synthesized via reaction of new pyridine-containing dibromo compound, 2,6-bis(4-bromophenyl)-4-(naphthalen-1-yl) pyridine, with thiophene-based diboronic ester via Suzuki cross-coupling reactions. 2,6-Bis(4-bromophenyl)-4-(naphthalen-1-yl) pyridine was synthesized starting from condensation reactions of 4-bromoacetophenone and 1-naphthaldehyde. The synthesized monomer and polymer were characterized by FT-IR and NMR spectroscopy. The physical properties of the polymer, including solubility and viscosity were studied, and the results showed good solubility and chain growth for polymer. Maximum absorption peak for polymer was 388 nm. The optical band gap energy of the polymers was determined by absorption onset and found to be 2.38 eV for polymer.

Benzyloxychalcone Hybrids as Prospective Acetylcholinesterase Inhibitors against Alzheimer’s Disease: Rational Design, Synthesis, In Silico ADMET Prediction, QSAR, Molecular Docking, DFT, and Molecular Dynamic Simulation Studies

“…Furthermore, a trans configuration is indicated by the coupling constant between 13.0 and 17.0 hertz. − In the IR spectrum, the carbonyl group of simple aliphatic ketones normally has a strong absorption band in the range of 1720-1708 cm ‑1 . However, for chalcone, the conjugation of CO will shift the frequency to the lower region due to the delocalization of π electrons ( I , II ), , as illustrated in Scheme . In this case, the conjugation of CO with α or β will give rise to absorption in the region 1700-1675 cm ‑1 , whereas CC will give rise to absorption at 1644-1617 cm ‑1 .…”

Preparation and characterization of polyaniline‐ and polythiophene‐based copolymer and its nanocomposite suitable for electro‐optical devices

“…[ 31 ] Other promising approaches include the synthesis of various types of composites and copolymers. [ 9 ] Copolymers of aniline, such as butyl thioaniline [ 32 ] and pyridine‐thiophene based copolymer [ 33 ] are reported and show a noticeable decrease in band gap or increase in conductivity when compared to their respective homopolymers. [ 34 ] PANI and polythiophene both are well established as conducting polymers and are extensively studied.…”