Dinuclear Rhenium Complexes with a Bridging Helicene-bis-bipyridine Ligand: Synthesis, Structure, and Photophysical and Chiroptical Properties
Publication Date
11-1-2020
Document Type
Article
Publication Title
ChemPlusChem
Volume
85
Issue
11
DOI
10.1002/cplu.202000559
First Page
2446
Last Page
2454
Abstract
By attaching pyridine groups to a diaza[6]helicene, a helical, bis-ditopic, bis-N N-coordinating ligand can be accessed. Dinuclear rhenium complexes featuring this bridging ligand, of the form [{Re(CO)3Cl}2(N N−N N)], have been prepared and resolved to give enantiopure complexes. These complexes are phosphorescent in solution at room temperature under one- and two-photon excitation. Their experimental chiroptical properties (optical rotation, electronic circular dichroism and circularly polarized emission) have been measured. They show, for instance, emission dissymmetry factors of c.a. ±3x10−3. Quantum-chemical calculations indicate the importance of stereochemistry on the optical activity, pointing towards further design improvements in such types of complexes.
Funding Number
859752 – HEL4CHIROLED – H2020‐MSCA‐ITN‐2019
Funding Sponsor
National Science Foundation
Keywords
circularly polarized luminescence, helicenes, N ligands, rhenium, two-photon absorption
Department
Chemistry
Recommended Citation
Nidal Saleh, Debsouri Kundu, Nicolas Vanthuyne, Joanna Olesiak-Banska, Anna Pniakowska, Katarzyna Matczyszyn, Victoria Y. Chang, Gilles Muller, J. A.Gareth Williams, Monika Srebro-Hooper, Jochen Autschbach, and Jeanne Crassous. "Dinuclear Rhenium Complexes with a Bridging Helicene-bis-bipyridine Ligand: Synthesis, Structure, and Photophysical and Chiroptical Properties" ChemPlusChem (2020): 2446-2454. https://doi.org/10.1002/cplu.202000559
