Zwitterion Materials In article number 2101407 by Zhonggui He, Jin Sun, and co-workers, prodrug nanoassemblies modified PEG or zwitterion materials are presented as spherical soldiers rod-shaped soldiers. Through the voyage in ocean, which indicates blood circulation, they reach castle, tumors, different ships. Soldiers ashore enter castle through gates, indicate endocytosis mechanisms, to play...

The interaction between CO2 and 1,2-diaminoethane was computed using pure and hybrid density functionals. The CAM-B3LYP and wB97X-D functionals using a triple-ζ basis set that includes diffuse and polarization functions are the best functionals for calculating the relative energies of the zwitterion intermediate compared to a coupled-cluster with a single, double and non-iterative triple excita...

The deprotonation kinetics of the DEA--C02 and the DIPA-COZ zwitterions have been studied in aqueous blends of an&es at 298 K. Amine mixtures investigated were: DEA-TEA, DEA-MDEA. DEL-DMMEA, DEA-DEMEA, DIPA-TEA, DIPA-MDEA, DIPA-DMME~ DIPA-DEMEA. FOG each blend the zwitterion deprotonation constant of the additonal base present in solution (i.e. the tertiary amine) was determined. The observed d...

Glycine in its neutral form can exist the gas phase while zwitterion is more stable water solution, but how many waters are actually necessary to stabilize zwitterionic structure phase? Are intramolecular isotropic spin coupling constants sensitive enough accuse change environment? or conformer observed? These and related questions have been investigated by a computational study at level of den...

The title compound, C(17)H(20)N(2)O(3), is a Schiff base, which is found as a zwitterion in the solid state. The geometry around the iminium N atom indicates sp(2)-hybridization. The zwitterion shows a strong intra-molecular N-H⋯O hydrogen-bond inter-action between the iminium N atom and the phenolate O atom.

Calculations are presented for the glycine-(H(2)O)(n) (-) (n=0-2) anionic clusters with excess electron, with the glycine core in the canonical or zwitterion form. A variety of conformers are predicted, and their relative energy is examined to estimate thermodynamic stability. The dynamic (proton transfer) pathways between the anionic clusters with the canonical and the zwitterion glycine core ...

A methacrylic terpolymer system with non-fouling interfacial properties was synthesized by the random copolymerization of hexyl methacrylate, methyl methacrylate and sulfobetaine methacrylate (a monomer bearing a zwitterionic pendant group). Polymers were synthesized from feeds containing 0-15 mol.% of the zwitterion-containing methacrylate. Proton nuclear magnetic resonance verified the incorp...

Equilibrium constants for keto-enol tautomerisation and migration of hydrogen from carbon to nitrogen to form enamine or zwitterion tautomers have been measured for 2-, 3and 4phenacylpyridines (PyCH,COPh) in aqueous solution at 25 "C. Relative tautomeric stabilities fall in the order ketoimine > enamine > enol and (for the 3-isomer) enol > zwitterion. Values of pKT, (-log KT) where KT = [enamin...