A Low‐Temperature‐Resistant Flexible Organic Crystal with Circularly Polarized Luminescence. (3rd May 2022)

• Record Type: Journal Article
• Authors: Pan, Xiuhong; Zheng, Anyi; Yu, Xu; Di, Qi; Li, Liang; Duan, Pengfei; Ye, Kaiqi; Naumov, Panče; Zhang, Hongyu
• Is Part Of: Angewandte Chemie. Volume 134:Number 25(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-05-03
• Subjects: Circularly Polarized Luminescence -- Flexible Crystals -- Low-Temperature Resistance -- Optical Waveguides; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202203938
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Flexible organic crystals with unique mechanical properties and excellent optical properties are of paramount significance for their wide applications in various research fields such as adaptive optics and soft robotics. However, low‐temperature‐resistant flexible organic crystal with circularly polarized luminescence (CPL) has never been reported. Herein, chiral organic crystals with CPL activity and low‐temperature flexibility (77 K) are fabricated by the solvent diffusion method from chiral Schiff base, S(R)‐4‐bromo‐2‐(((1‐phenylethyl)imino)methyl)phenol (S(R)‐BPEMP). The corresponding chirooptical properties for the two enantiomeric crystals were thoroughly investigated, including the measurements of circular dichroism (CD) and CPL. To the best of our knowledge, this is the first report on low‐molecular‐weight flexible organic crystals with CPL activity, and we believe that the results will give a new impetus to the research of organic crystals. Abstract : A pair of chiral enantiomers with circularly polarized luminescence were designed and employed as building blocks to construct organic crystals with excellent low‐temperature (77 K) elasticity. The bent crystal functions as an efficient optical waveguide at low temperature (77 K), thus indicating its potential application in extreme environments.