Highly Stable Supramolecular Donor-Acceptor Complexes Involving (<i>Z</i>)-, (<i>E</i>)-di(3-pyridyl)ethylene Derivatives as Weak Acceptors: Structure-Property Relationships.

ABSTRACT: The Z-isomer of N,N'-diammoniopropyl derivative of di(3-pyridyl)ethylene was synthesized. The structure and stability of complexes between this non-planar weak acceptor (A, (Z)-2) and a planar strong donor, the E-isomer of bis(18-crown-6)stilbene (D, (E)-1), were studied using X-ray diffraction, ¹H NMR spectroscopy, and optical spectroscopy, including ¹H NMR and spectrofluorimetric titrations. In MeCN, the components form a very stable pseudocyclic bimolecular complex (logK_D·A = 8.48) due to homoditopic coordination of the ammonium groups of the acceptor to the crown moieties of the donor through numerous hydrogen bonds. Intrasupramolecular photo-driven electron transfer (ET) in the isomeric com

SUBMITTER: Vedernikov AI 

PROVIDER: S-EPMC12525814 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature