International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2557

Full Length Research Paper

Equilibrium and related thermodynamic studies of a hydrogen bonded multicomponent complex in mixed solvents

Mamta Chhabra Sharma1* and Sandeep Sharma2
  1Department of Chemistry, Kirori Mal College, University of Delhi, Delhi-110007, India. 2Department of Chemistry, Rajdhani College, University of Delhi, Delhi-110015, India.
Email: [email protected], [email protected]

  •  Accepted: 02 November 2011
  •  Published: 30 November 2011



An interesting multicomponent complex has been prepared by incorporating a non – ionic homopolymer (e.g., Poly(Vinyl Pyrrolidone) PVP) on a typical copolymer (e .g., Methacrylic Acid/Acryl Amide MA/AAm). Stability constants and related thermodynamic parameters (e.g., Free energy change ∆Fo, Enthalpy change ∆Ho and Entropy change ∆So) have been determined. Interpretations have been sought in terms of secondary binding forces like hydrogen bonding, Van der Waals interactions and hydrophobic interactions. Hydrophobic interactions get significantly diminished in higher concentration of organic solvents (e.g., methanol) thus affecting the stability of the complex.


Key words: Non-ionic homopolymer, copolymer, stability constants hydrophobic interactions, stability constants, thermodynamic parameters.