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Anion‐Coordination‐Assisted Assembly of Supramolecular Charge‐Transfer Complexes Based on Tris(urea) Ligands
Author(s) -
Zhang Dan,
Hou LeKai,
Zhang Qiang,
He JiaWei,
Feng HongJian,
Würthner Frank,
Yang XiaoJuan,
Wu Biao
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201905021
Subject(s) - supramolecular chemistry , chemistry , stacking , crystallography , non covalent interactions , viologen , ion , molecule , acceptor , ionic bonding , tris , electron acceptor , hydrogen bond , photochemistry , crystal structure , organic chemistry , physics , biochemistry , condensed matter physics
Charge‐transfer (CT) complexes, formed by noncovalent bonding between electron‐rich (donor, D) and electron‐deficient (acceptor, A) molecules (or moieties) have attracted considerable attention due to their fascinating structures and potential applications. Herein, we demonstrate that anion coordination is a promising strategy to promote CT complex formation between anion‐binding, electron‐rich tris(urea) donor ligands (D) and electron‐deficient viologen cation acceptors (A), which form co‐crystals featuring infinite ⋅⋅⋅DADA⋅⋅⋅ or discrete (circular DADA or three‐decker DAD) π‐stacking interactions. These CT complexes were studied by X‐ray diffraction, UV/Vis spectroscopy, electric conductivity measurements, charge displacement curve (CDC) calculations, and DFT computations.