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Exploring potentialities and limitations of stapled o‐oligo(phenyleneethynylene)s (o‐OPEs) as efficient circularly polarized luminescence emitters |
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| Authors: | Pablo Reiné José Justicia Sara P Morcillo Giuseppe Mazzeo Emilio García‐Fernández Antonio Rodríguez‐Diéguez Luis Álvarez de Cienfuegos Sergio Abbate Juan M Cuerva Giovanna Longhi Delia Miguel |
| Institution: | 1. Department of Organic Chemistry, University of Granada, Granada, Spain;2. Dipartimento di Medicina Molecolare e Traslazionale, Universitá di Brescia, Brescia, Italy;3. Department of Physical Chemistry, University of Granada, Granada, Spain;4. Department of Inorganic Chemistry, University of Granada, Granada, Spain |
| Abstract: | In this paper, we have studied the chiroptical properties of a family of o‐oligo(phenyleneethynylene) (o‐OPE) derivatives with different steric hindrance. Experimental results show high dissymmetry factors (gabs and glum up to 1.1 × 10?2) and very similar electronic circular dichroism (ECD) and circularly polarized luminescence (CPL) for all the derivatives that make this basic o‐OPE scaffold a robust pure organic emitter. Vibrational circular dichroism spectra are used to characterize conformational properties in solution. Density functional theory and time‐dependent density functional theory calculations support experimental results also proving that ECD and CPL are almost exclusively linked to helical moiety and not to size or conformation of substituents. As chiroptical properties of these emitters are independent of substituents, this OPE scaffold can be used as basic skeleton for the design of sensing probes with high CPL efficiencies. |
| Keywords: | chiroptical properties CPL ECD enantiopure organic emitters VCD |