Amsallem, Dana;Bedi, Anjan;Tassinari, Francesco;Gidron, Ori published 《Relation between Morphology and Chiroptical Properties in Chiral Conducting Polymer Films: A Case Study in Chiral PEDOT》 in 2020. The article was appeared in 《Macromolecules (Washington, DC, United States)》. They have made some progress in their research.Category: alcohols-buliding-blocks The article mentions the following:
The electronic properties of conducting polymers are influenced by their micro- and macrostructural orders, which can be tailored by substituent modification. However, while the effect of substituents on conducting polymers is extensively investigated, chiral substituents are far less studied. Furthermore, many chiral conducting polymers have regioirregular structures, which result in polymer films with inferior properties. In this work, we apply electronic CD (ECD) spectroscopy to study the morphol. changes to the chiral polymers under different polymerization conditions. For this purpose, we investigated 3,4-ethylenedioxythiophene (EDOT) derivatives having two stereogenic centers on each monomer and bearing Me or Ph side groups (dimethyl-EDOT and diphenyl-EDOT, resp.). Polymerizing the enantiomerically pure monomers produces regioregular and stereoregular dimethyl-PEDOT and diphenyl-PEDOT, resp. The effect of the electrolyte and solvent on polymer film morphol. was studied using SEM and ECD, showing a correlation between the polymer’s morphol. and the chiroptical properties of its films. We found that, for diphenyl-PEDOT, the combination of perchlorate anion electrolyte and acetonitrile solvent resulted in a unique morphol. characterized by significant intermol. interactions. These interactions were clearly observable in the ECD spectra in the form of exciton couplings, whose presence was supported by TD-DFT calculations A small enantiomeric excess was sufficient to induce very intense ECD signals, demonstrating chiral amplification in electropolymerized films. To complete the study, the researchers used rel-(1R,2S)-1,2-Diphenylethane-1,2-diol (cas: 579-43-1) .
rel-(1R,2S)-1,2-Diphenylethane-1,2-diol(cas: 579-43-1 Category: alcohols-buliding-blocks) has been used in the preparation of trans-methyl meso-hydrobenzoin phosphite.
Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts