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Chiral Luminophore Guided Self-Assembly of Achiral Block Copolymers for the Amplification of Circularly Polarized Luminescence.
- Source :
-
ACS macro letters [ACS Macro Lett] 2024 Jun 18; Vol. 13 (6), pp. 734-740. Date of Electronic Publication: 2024 May 30. - Publication Year :
- 2024
-
Abstract
- This work aims to examine the effect of self-assembly on the chiroptic responses of the achiral block copolymer (BCP) polystyrene- b -poly(ethylene oxide) (PS- b -PEO) associated with chiral luminophores, ( R )- or ( S )-1,1'-bi-2-naphthol (( R )- or ( S )-BINOL), through hydrogen bonding. With the formation of a well-ordered helical phase (H*), significantly induced circular dichroism (ICD) signals for the PEO block in the mixture can be found. Most interestingly, a remarkable amplification with an extremely large dissymmetry factor of luminescence ( g <subscript>lum</subscript> ) from 10 <superscript>-3</superscript> to 0.3 (i.e., induced circular polarized luminescence (iCPL) behavior) for the chiral BINOLs in the mixture can be achieved by the formation of the helical phase (H*) via mesochiral self-assembly. As a result, by taking advantage of BCP for mesochiral self-assembly, it is feasible to create a nanostructured monolith with substantial optical activities, offering promising applications in the design of chiroptic devices.
Details
- Language :
- English
- ISSN :
- 2161-1653
- Volume :
- 13
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- ACS macro letters
- Publication Type :
- Academic Journal
- Accession number :
- 38814070
- Full Text :
- https://doi.org/10.1021/acsmacrolett.4c00188