Ferroelectric Polarization Reversal Stabilized by Hydrogen Bonding in N-Phenylated Aromatic Polyurea
نویسندگان
چکیده
منابع مشابه
Intra-protein hydrogen bonding is dynamically stabilized by electronic polarization.
Molecular dynamics (MD) simulation has been carried out to study dynamical stability of intra-protein hydrogen bonds based on two set of atomic charges, the standard AMBER charge and the polarized protein-specific charge (PPC). The latter is derived from quantum mechanical calculation for protein in solution using a recently developed molecular fractionation with conjugate caps-Poisson-Boltzman...
متن کاملFerroelectric polarization reversal via successive ferroelastic transitions.
Switchable polarization makes ferroelectrics a critical component in memories, actuators and electro-optic devices, and potential candidates for nanoelectronics. Although many studies of ferroelectric switching have been undertaken, much remains to be understood about switching in complex domain structures and in devices. In this work, a combination of thin-film epitaxy, macro- and nanoscale pr...
متن کاملRedox-induced fluoride ligand dissociation stabilized by intramolecular hydrogen bonding.
Chemical reduction of a tripodal Cu(II)-F complex containing pendent hydroxyl groups results in the partial dissociation of a F(-) ligand from Cu. The resulting Cu(I) complex is characterized as containing an outer sphere F(-) anion 'captured' by hydrogen bonds. The pendent hydroxyl groups were found to be crucial for reductive stability.
متن کاملHydrogen-bonding directed reversal of enantioselectivity.
The preparation of both enantiomers of a chiral compound is still a vital task in pharmaceutical and bioorganic chemistry.1 Basically, it can be achieved with the use of both enantiomers of a chiral ligand, respectively, in a catalytic asymmetric process. However, the two enantiomers of a chiral ligand are not always easily available from natural chiral sources, such as amino acids, carbohydrat...
متن کاملSpectroscopic Evidence for Clusters of Like‐Charged Ions in Ionic Liquids Stabilized by Cooperative Hydrogen Bonding
Direct spectroscopic evidence for hydrogen-bonded clusters of like-charged ions is reported for ionic liquids. The measured infrared O-H vibrational bands of the hydroxyethyl groups in the cations can be assigned to the dispersion-corrected DFT calculated frequencies of linear and cyclic clusters. Compensating the like-charge Coulomb repulsion, these cationic clusters can range up to cyclic tet...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Polymer Journal
سال: 1994
ISSN: 0032-3896,1349-0540
DOI: 10.1295/polymj.26.505