Straightforward synthesis and resolution of a series of chiral fluorescent macrocycles are presented, together with their electronic circular dichroism (ECD), strong excimer fluorescence (EF, λ 300 to 650 nm) and allied highly circularly polarized luminescence (CPL, glum up to 1.7 × 10-2). The ECD, EF and CPL responses are strongly affected by the presence of metal ions (Na+, Ba2+) thanks to deep conformational changes. While ECD signals can be almost completely reversibly inverted upon the complexation/decomplexation of metal ions in a typical binary response, CPL signals are reversibly quenched concomitantly. The designed macrocycles display thus a remarkable combination of both +/- ECD and on/off CPL reversible switching.

Combined reversible switching of ECD and quenching of CPL with chiral fluorescent macrocycles

Zinna, Francesco
Co-primo
;
Pescitelli, Gennaro;Di Bari, Lorenzo;
2018

Abstract

Straightforward synthesis and resolution of a series of chiral fluorescent macrocycles are presented, together with their electronic circular dichroism (ECD), strong excimer fluorescence (EF, λ 300 to 650 nm) and allied highly circularly polarized luminescence (CPL, glum up to 1.7 × 10-2). The ECD, EF and CPL responses are strongly affected by the presence of metal ions (Na+, Ba2+) thanks to deep conformational changes. While ECD signals can be almost completely reversibly inverted upon the complexation/decomplexation of metal ions in a typical binary response, CPL signals are reversibly quenched concomitantly. The designed macrocycles display thus a remarkable combination of both +/- ECD and on/off CPL reversible switching.
Homberg, Alexandre; Brun, Elodie; Zinna, Francesco; Pascal, Simon; Górecki, Marcin; Monnier, Luc; Besnard, Céline; Pescitelli, Gennaro; Di Bari, Lorenzo; Lacour, Jérôme Jean Lucien Louis
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/934842
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