Title
Enantioselective Light Harvesting with Perylenediimide Guests on Self-Assembled Chiral Naphthalenediimide Nanofibers
Author
Ramarani Sethy, Jatish Kumar, Rémi Métivier, Marine Louis, Keitaro Nakatani, Nila Mohan, Thazhe Mecheri, Akhila Subhakumari, K. George Thomas, Tsuyoshi Kawai, Takuya Nakashima
Year
2017
Journal
Angewandte Chemie
Abstract
Self‐assembling molecular systems often display amplified chirality compared to the monomeric state, which makes the molecular recognition more sensitive to chiral analytes. Herein, we report the almost absolute enantioselective recognition of a chiral perylenediimide (PDI) molecule by chiral supramolecular nanofibers of a bichromophoric naphthalenediimide (NDI) derivative. The chiral recognition was evaluated through the Förster resonance energy transfer (FRET) from the NDI‐based host nanofibers to the guest PDI molecules. The excitation energy was successfully transferred to the guest molecule through efficient energy migration along the host nanofiber, thus demonstrating the light‐harvesting capability of these hybrid systems. Furthermore, circularly polarized luminescence (CPL) was enantioselectively sensitized by the guest molecule as the wavelength band and sign of the CPL signal were switched in response to the chiral guest molecule.
Instrument
FP-8500
Keywords
Fluorescence, Ligand binding, Chemical stability, Nanostructures, Materials