Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 223, Issue -, Pages 420-426Publisher
ELSEVIER
DOI: 10.1016/j.molliq.2016.08.057
Keywords
Dopamine; Dopamine hydrochloride; Hydrogen bonding; Ethanol
Funding
- Science and Technology Development Program of Henan Province of China [144300510034, 142300410125]
- Foundation of Henan Educational Committee [15A150042]
- NSF for Distinguished Young Scholars of Shandong Province [JQ201303]
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Cyclic voltammetry (CV), density functional theory (DFT) calculations, and atoms in molecules (AIM) analyses were performed to investigate the hydrogen bonding in dopamine-ethanol and dopamine hydrochloride-ethanol mixtures. CV results show that the anodic/cathodic peak potential of dopamine hydrochloride in ethanol is influenced by the hydrogen bonding formed in the mixtures. The DFT and AIM results indicate that the hydrogen atoms of -NH3+ in dopamine hydrochloride-ethanol system are easier to interact with ethanol by hydrogen bonding than those in dopamine-ethanol system. On the contrary, the hydrogen atoms on phenolic hydroxyl groups can form stronger hydrogen bonding with ethanol in dopamine-ethanol system than in dopamine hydrochloride-ethanol system. (C) 2016 Elsevier B.V. All rights reserved.
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