Diffusivities of pseudoplanar molecules at trace concentration in methanol have been measured at 298.2 K using Taylor’s dispersion method. The data of the polar and nonpolar aromatic solutes are compared, and the effects due to solute–solvent interactions on diffusion, together with the solvation numbers, are determined. In this study, the effects are combined with the recently developed solute hydrogen-bond scales to unravel hydrogen bonding between solute and solvent. It is found that the degrees of association of the solutes with methanol decrease in the sequence aromatic compounds. Except for o-nitrophenol, which is capable of intramolecular hydrogen bonding, all aromatic acids, phenols, and amines studied behave more as hydrogen-bond donor than acceptor in methanol. The present work also indicates that motions of associated molecules can be understood in terms of the molecular behavior of nonassociated solutes and the hydrogen-bond acidity/basicity of polar solutes.
Skip Nav Destination
Article navigation
8 February 1999
Research Article|
February 08 1999
Effects of molecular association on mutual diffusion: A study of hydrogen bonding in dilute solutions
J. G. Lu;
J. G. Lu
Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
Search for other works by this author on:
Rita Kong;
Rita Kong
Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
Search for other works by this author on:
T. C. Chan
T. C. Chan
Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
Search for other works by this author on:
J. Chem. Phys. 110, 3003–3008 (1999)
Article history
Received:
September 23 1998
Accepted:
November 06 1998
Citation
J. G. Lu, Rita Kong, T. C. Chan; Effects of molecular association on mutual diffusion: A study of hydrogen bonding in dilute solutions. J. Chem. Phys. 8 February 1999; 110 (6): 3003–3008. https://doi.org/10.1063/1.477895
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
DeePMD-kit v2: A software package for deep potential models
Jinzhe Zeng, Duo Zhang, et al.
CREST—A program for the exploration of low-energy molecular chemical space
Philipp Pracht, Stefan Grimme, et al.
Dielectric profile at the Pt(111)/water interface
Jia-Xin Zhu, Jun Cheng, et al.