The intensive use of fossil energy causes global warming. Hydrogen fuel cell is a technology that transforms the chemical energy stored in hydrogen directly into electricity with high efficiency, and its only emission is water. It acts as one of the practical and promising solutions to realize a ...
Hydrogen bonding energy decreases with increasing temperature and ion strength, as well as by the presence of chaotropic agents such as urea and guanidine hydrochloride. View chapterExplore book On the interface between biomaterials and two-dimensional materials for biomedical applications Chunbao Du, ....
Gas phase hydrogen bonding was studied via infrared spectroscopy in the following systems: methyl acetatehydrogen chloride, methyl formatehydrogen chloride, 2-butanonehydrogen chloride, and acetonehydrogen chloride. The intensity of the HCl stretching vibration was monitored as a function of temperature, ...
The ring structures in the cluster are classified by the pattern of alignment of the hydrogen bonds. The lengthening of the hydrogen-bonding OH of Wdis strongly correlated with the charge-transferenergy. 展开 关键词: microwave heating temperature rising polar species reaction rates collision theory ...
(e.g. chemical) states. Methods for storage currently being used or researched are high-pressure gas tanks, cryogenic liquid tanks, gas pipelines, geologic storage in salt caverns, adsorption in metal hydrides, and bonding with liquid organic hydrogen carriers (LOHCs). Each form of storage has...
Hydrogen bonding is a vital feature of proteins and is necessary for maintaining: [1–4] Structure. Folding status. Stability. Selectivity and affinity towards ligands. Proteins contain many hydrogen bond donors and acceptors, including amide (-NH) donors and carbonyl (-CO) acceptors along the pe...
2) hydrogen bond energy 氢键能3) hydrogen bonding energy 氢键合能4) intramolecular H-bond energy 分子内氢键键能 1. The results show that the intramolecular H-bond energy is-6. 提出一种计算多肽中N-H…O=C分子内氢键键能的新方法。
Although hydrogen bond is ≈10 times weaker (bonding energy 5–30 kJ mol−1) than the typical hydrogen bonds (bonding energy ≈345 kJ mol−1), it has a prominent effect on the viscoelastic properties, phase separation, and the degree of crystallinity of the polymers. Single hydrogen ...
S18a-b), suggesting a stronger interaction between furfural and OH group due to the hydrogen bonding of −OH···O = CH − . The hydrogen bond interaction also elongates the bond length of C = O from 1.230 Å to 1.242 Å, weakening the C = O bond...
A consequence of hydrogen bonding is that hydrogen bonds tend to arrange in a tetrahedron around each water molecule, leading to the well-known crystal structure of snowflakes. In liquid water, the distance between adjacent molecules is larger and the energy of the molecules is high enough that ...