The main intermolecular interactions are the π–π between the pyridine and the fluorinated ring of molecules stacking in columns (1a with 1a and 1b with 1b) and the O–HN H-bonds. The imine acts as a H-bond-donor to the water molecules and a H-bond-acceptor of the water molecule'...
Other weak hydrogen bonds can be established with aromatic groups (e.g. indole) acting as donors or acceptors [38, 39]. When the electronegative atoms D and A become closer, the barrier for transfer of the H atom between D and A is lowered. It can eventually become low enough so that...
The material contains 4-phenol oxygen-1, 8-naphthalimide or 4-(tert-butyl-substituted phenol oxygen)-1, 8-blue fluorescent naphthalimide unit and a polyamide strip; the polyamide strip contains six hydrogen bond donors and acceptors, and can form dimer through a hydrogen bond self-assembly ...
Proteins contain many hydrogen bond donors and acceptors, including amide (-NH) donors and carbonyl (-CO) acceptors along the peptide backbone and the polar functional groups on the side chains of individual amino acids. Let’s take a look at these properties and the corresponding importance of ...
donors [38]. The experimental values for donors ranged from − 10 to + 8 kJ mol−1. These distributions and calibration results were compiled for display in Fig.2. For both donors and acceptors, the computed Gibbs free energies in solution were systematically off. This was ...
volving riboflavine Donors and acceptors of hydrogen in oxidation-reduction reactions involving riboflavineDonors and acceptors of hydrogen in oxidation-reduction reactions involving riboflavineKolesnikov, P A
Carboxylic acids act as both hydrogen bond acceptors and donors. Due to the presence of the carbonyl group, it acts as a hydrogen bond acceptor. The presence of the hydroxyl group makes it hydrogen bond donors. This helps them to participate in hydrogen bonding. Carboxylic acids usually exist ...
These results indicate that all of the oxygen and hydrogen atoms in apigenin can be hydrogen-bond acceptors and donors and that the oxygen and hydrogen atoms in the hydroxyl groups may be the preferred interaction sites over the other oxygen and hydrogen atoms. The carbon atom C9 has the ...
Herein, we discuss how competing hydrogen bonding motifs control the supramolecular polymerization pathway of a two鈥恈omponent molecular 蟺鈥恠ystem of oligo(p鈥恜henylenevinylene) (OPV鈥怋 and OPV鈥怭) donors and perylene bisimide (PBI鈥怋 and PBI鈥怉) acceptors. It is shown that among the...
A pair of ammonium groups tethered to the phenazine group in the 1 and 6 positions through alkyl amide links, act as hydrogen-bond donors to amide oxygen atoms of symmetry-related neighbouring dications. With each dication molecule having two hydrogen-bond donors and acceptors, an undulating 2D...