A Structure-Adaptive Ligand: The Conformation Changes to Fit with the Lengths and Angles of Tetravalent Bis-Paraquat Guests.

Yoichi HabataYuka MatsumotoHiroki HoritaMari Ikeda Shunsuke Kuwahara

Published in: The Journal of organic chemistry (2022)

A flexible cylindrical cryptand ( 1b ) with two m -phenylene-26-crown-8 ethers has been prepared, and its complexing properties with respect to tetravalent cationic bis-paraquat guests have been investigated. Diffusion-ordered spectroscopy nuclear magnetic resonance (NMR) and titration experiments using cold electrospray ionization mass spectrometry and 1 H NMR revealed that 1b has versatile complexing properties with respect to tetravalent cationic guests used despite the guest molecules' length and shape.

Keyphrases

magnetic resonance
solid state
high resolution
mass spectrometry
ionic liquid
liquid chromatography
pulmonary fibrosis
single cell
single molecule
atomic force microscopy
capillary electrophoresis
computed tomography
crystal structure
solid phase extraction