Aggregation-Induced Polarization (AIP): Optical Rotation Amplification and Adjustment of Chiral Aggregates of Folding Oligomers and Polymers

Yao Tang; Sai Zhang; Ting Xu; Qingkai Yuan; Jia-Yin Wang; Shengzhou Jin; Yu Wang; Junyi Pan; Isaac Griffin; Daixiang Chen; Guigen Li

doi:10.3389/fchem.2022.962638

Aggregation-Induced Polarization (AIP): Optical Rotation Amplification and Adjustment of Chiral Aggregates of Folding Oligomers and Polymers

Front Chem. 2022 Aug 12:10:962638. doi: 10.3389/fchem.2022.962638. eCollection 2022.

Authors

Yao Tang¹, Sai Zhang¹, Ting Xu², Qingkai Yuan¹, Jia-Yin Wang², Shengzhou Jin², Yu Wang², Junyi Pan², Isaac Griffin¹, Daixiang Chen³, Guigen Li^{1

2}

Affiliations

¹ Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, United States.
² Institute of Chemistry and BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China.
³ Continuous Flow Engineering Laboratory of National Petroleum and Chemical Industry, Changzhou University, Changzhou, China.

Abstract

The phenomenon of aggregation-induced polarization (AIP) was observed showing optical rotation amplification and adjustment. The relationship between optical rotations of chiral aggregates of multilayered chiral folding oligomers and polymers with water% in THF (f _w) has been established accordingly. New multilayered chiral oligomers were synthesized under the asymmetric catalytic systems established by our laboratory recently. These products were well-characterized by UV-vis, NMR, and MALDI-TOF spectra. Absolute stereochemistry (enantio- and diastereochemistry) was assigned by comparison with similar asymmetric induction by the same catalyst in our previous reactions. The present AIP work can serve as a new tool to determine chiral aggregates, especially for those that cannot display emission. AIP would also complement AIE-based CPL since AIP serves as a new tool providing enhanced right- or left-hand polarized lights with individual wavelengths. It will find many applications in chemical and materials science in the future.

Keywords: aggregation-induced polarization (AIP); chiral aggregates; multilayer folding chirality; multilayer folding oligomer; multilayer folding polymer.