@article{10272/23277,
year = {2024},
month = {1},
url = {https://hdl.handle.net/10272/23277},
abstract = {A series of six azaborahelicenes with varying electron-donor substitution at the 4-position of the aryl residue (i.e., naphthyl) or with variable π-extension of the aryl residue (thianthrenyl, anthryl, pyrenyl) was prepared with an efficient and flexible synthetic protocol. These different types of functionalization afforded notably pronounced intramolecular charge-transfer (ICT) character for the dyes with the strongest electron donor substitution (NMe2) or easiest to oxidize aryl residues, as evidenced by photophysical investigations. These effects also impact the corresponding chiroptical properties of the separated M- and P-enantiomers, which notably display circularly polarized luminescence (CPL) with dissymmetry factors in the order of magnitude of 10−4 to 10−3. Theoretical calculations confirm the optical spectroscopy data and are in agreement with the proposed involvement of ICT processes.},
organization = {We thank the Spanish Ministerio de Ciencia e Innovación for financial support (grant PID2020-119992GB-I00 for U. P., PID2019-106358GB-C21 for A. R., and doctoral fellowship PRE2020-092646 for P. V.-D.). Further, U. P. received funding from the University of Huelva/European Research and Development Fund (ERDF); project UHU-202070. A. R. is grateful to the Consejo Superior de Investigaciones Científicas (CSIC, grant 202080I005). D. J. is indebted to the CCIPL/Glicid computational center installed in Nantes for generous allocation of computational resources. This project is co-funded by the European Union (ERC), SHIFUMI, 101041516 (L. F.). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Research Council. Neither the European Union nor the granting authority can be held responsible for them. We also thank Dr F. J. Fernández de Córdova (Institute for Chemical Research – CSIC, Seville) for the X-ray structure analysis.},
publisher = {Royal Society of Chemistry (RSC)},
title = {Azaborahelicene fluorophores derived from four-coordinate N,C-boron chelates: synthesis, photophysical and chiroptical properties},
doi = {10.1039/d3qo01762a},
author = {Vázquez Domínguez, Pablo and Rizo, José Francisco and Fernández Arteaga, Jesús and Jacquemin, Denis and Favereau, Ludovic and Ros, Abel and Pischel, Uwe},
}