Excimer-origin CPL vs. monomer-origin magnetic CPL in photo-excited chiral binaphthyl-ester-pyrenes: critical role of ester direction

Excimer-origin CPL vs. monomer-origin magnetic CPL in photo-excited chiral binaphthyl-ester-pyrenes: critical role of ester direction

Two chiral binaphthyl (BNp) derivatives bearing oppositely oriented ester linkers to two pyrene (Py) moieties [( R )/( S )- 1 and ( R )/( S )- 2 ] enabled Py-origin circularly polarized luminescence (CPL), magnetic CPL (MCPL), and circular dichroism (CD). ( R )- 1 that exhibited (−)-sign CD showed (...

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Veröffentlicht in:Physical chemistry chemical physics : PCCP 2020-01, Vol.22 (25), p.13862-13866
Hauptverfasser: Okada, Hana, Hara, Nobuyuki, Kaji, Daiki, Shizuma, Motohiro, Fujuiki, Michiya, Imai, Yoshitane
Format: Artikel
Sprache:eng
Schlagworte:
Circular polarization
Dichroism
Excimers
Monomers
NMR
Nuclear magnetic resonance
Pyrenes
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Zusammenfassung:Two chiral binaphthyl (BNp) derivatives bearing oppositely oriented ester linkers to two pyrene (Py) moieties [( R )/( S )- 1 and ( R )/( S )- 2 ] enabled Py-origin circularly polarized luminescence (CPL), magnetic CPL (MCPL), and circular dichroism (CD). ( R )- 1 that exhibited (−)-sign CD showed (+)-sign Py-excimer CPL but did not exhibit MCPL. Conversely, ( R )- 2 , with (−)-sign CD, did not show excimer-origin CPL, but exhibited clear Py-monomer MCPL.
ISSN:1463-9076
1463-9084
DOI:10.1039/d0cp02215b