Anion-Coordination-Assisted Assembly of Supramolecular Charge-Transfer Complexes Based on Tris(urea) Ligands.
Dan ZhangLe-Kai HouQiang ZhangJia-Wei HeHong-Jian FengFrank WürthnerXiao-Juan YangBiao WuPublished in: Chemistry (Weinheim an der Bergstrasse, Germany) (2020)
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.
Keyphrases
- solar cells
- dual energy
- ionic liquid
- image quality
- computed tomography
- electron microscopy
- contrast enhanced
- high resolution
- density functional theory
- positron emission tomography
- ms ms
- room temperature
- working memory
- magnetic resonance
- electron transfer
- cell cycle
- transcription factor
- crystal structure
- energy transfer
- dna binding
- pet ct
- water soluble