Synthesis and characterization of different poly(1-vinylindole)s for photorefractive materials

Abstract

The main goal of this research was to verify if some advantages could be obtained by the replacement of poly(1‐vinylcarbazole), a component commonly employed for organic photorefractive materials, with various polymers containing side‐chain heteroaromatic moieties. For this purpose, poly(1‐vinylpyrrole), poly(1‐vinylindole), and some methyl‐substituted compounds of poly(1‐vinylindole) were considered. The best conditions for both monomer synthesis and polymerization were found. A first possible advantage of the new polymeric substrates resided in the values of the glass‐transition temperature, which, as expected, was constantly lower than that of poly(1‐vinylcarbazole). This could lead to a material that requires the introduction of a lower quantity of plasticizer in the final photorefractive blend to display photorefractive behavior at room temperature. In addition, the verified higher electric dipole moments of the pyrrole and indole derivatives could improve the compatibility of the optically nonlinear component required in the system, typically an azo‐molecule, by increasing its solubility inside the blend. All the synthesized vinyl monomers and polymers gave clear spectroscopic evidence of the formation of charge‐transfer complexes with 2,4,7‐trinitrofluorenylidenmalonitrile, an efficient sensitizer for photoconductivity. © 2000 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 39: 253–262, 2001

Synthesis and characterization of a new disubstituted polyacetylene containing indolylazo moieties in side chains

“…Indole‐based NLO molecules and polymers containing indolyl chromophores have been found to exhibit large nonlinear optical coefficients, relatively good optical transparency, and photoconductive sensitivity 29–32. This is believed to be associated with the structural feature of the indole ring, which is similar to carbazole ring, but has a smaller molecular volume.…”

Investigation on Copper-catalyzed Vinylation ofN- andS-centered Nucleophiles

“…该反应不需要配体也 可以进行, 但是产率略低, 约 60%. [13] , 也是许多 药物分子的关键结构单元 [14] . 在早期关于 Cu 催化唑类 N-H 烯基化反应的报道中, 使用的是烯基硼酸作为烯 基化试剂, 需要另外引入适当氧化剂使反应进行.…”

Indole‐based polymer and its silver nanocomposite as advanced antibacterial agents: synthetic path, kinetics of polymerization and applications

“…In recent years, LRP methods have been employed for the synthesis of polymers containing indole derivatives in the main and side chains. A variety of polymers having indole groups in side chains have been reported, including poly( N ‐vinylindole), polyacrylates,, polymethacrylates and polyacetylene derivatives. Polyindole and poly( N ‐alkylindole) have also been synthesized by electrochemical oxidation of indole or chemical oxidation using FeCl 3 or CuCl 2 .…”