VCD spectroscopy reveals conformational changes of chiral crown ethers upon complexation of potassium and ammonium cations
Luisa Weirich, Gers Tusha, Elric Engelage, Lars V. Schäfer, Christian Merten
Abstract
-deformation modes are found to gain VCD intensity through an induced VCD process. An analysis of the vibrational spectra enables a differentiation of VCD active and inactive guest modes: There appears to be a correlation between the symmetry of the vibrational mode and the induced VCD intensity. While this finding makes the host-guest complexes interesting systems for future theoretical studies on the origin of induced VCD signatures, the observations described in this study demonstrate that VCD spectroscopy is indeed a suitable technique for the characterization of supramolecular host-guest complexes.
Topics & Concepts
ChemistryMoleculeSupramolecular chemistrySpectroscopyIntramolecular forceHost–guest chemistryInfrared spectroscopyCrystallographyStereochemistryComputational chemistryOrganic chemistryQuantum mechanicsPhysicsMolecular spectroscopy and chiralitySpectroscopy and Quantum Chemical StudiesMolecular Sensors and Ion Detection