Construction of Supramolecular Structures via. Hydrogen Bonds. Supramolecular Liquid-Crystalline Networks Built through Hydrogen Bonds.

Ammonium and caesium carbonate peroxosolvates: supramolecular networks formed by hydrogen bonds.

Diammonium carbonate hydrogen peroxide monosolvate, 2NH(4)(+)·CO(3)(2-)·H(2)O(2), (I), and dicaesium carbonate hydrogen peroxide trisolvate, 2Cs(+)·CO(3)(2-)·3H(2)O(2), (II), were crystallized from 98% hydrogen peroxide. In (I), the carbonate anions and peroxide solvent molecules are arranged on twofold axes. The peroxide molecules act as donors in only two hydrogen bonds with carbonate groups,...

Hydrogen Bonds

Visualizing Halogen Bonds in Planar Supramolecular Systems

Supramolecular interactions were studied in two planar model systems, 1,5and 2,6-dibromoanthraquinones, prepared on Au(111) using scanning tunneling microscopy. In both systems, we found rigid triangular structures that consisted of simultaneous halogen bonds and hydrogen bonds, as reported in protein-ligand complexes. We proposed molecular models that were well reproduced by first-principle st...

Vibrational dynamics of hydrogen bonds

Fast and Slow Dynamics of Hydrogen Bonds in Liquid Water

We study hydrogen-bond dynamics in liquid water at low temperatures using molecular dynamics simulations. We find that bond lifetime (“fast dynamics”) has Arrhenius temperature dependence. We also calculate the bond correlation function and find that the correlation time (“slow dynamics”) shows power-law behavior. This power-law behavior, as well as the decay of the bond correlations, is consis...