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An Easy and Fast Experiment for the Determination of the Equilibrium Constants of an Acid-Base Pair, Free and Complexed with a Molecular Receptor
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Abstract
This paper shows a pH-potentiometric technique, an experimental procedure, and a mathematical model, easily affordable in the laboratory, for the simultaneous and fast determination of all the equilibrium constants involved in the competitive association of an acid-base pair substrate with a molecular receptor in aqueous solution. From the dependence of these association constants on temperature (van't Hoff analysis), the change of the enthalpy, ΔH°, and the entropy, ΔS°, of the processes can be estimated and discussed in terms of the driving forces governing the interactions.
Keywords (Audience):
Upper-Division UndergraduateKeywords (Domain):
Laboratory InstructionKeywords (Pedagogy):
Hands-On Learning / ManipulativesKeywords (Subject):
EquilibriumCiting Articles
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This article has been cited by 1 ACS Journal articles (1 most recent appear below).
Plastic Antibodies: Molecular Recognition with Imprinted Polymers. An Introductory Polymer Chemistry Laboratory Investigation
Gregory T. Rushton , Brian Furmanski and Ken D. ShimizuJournal of Chemical Education2005 82 (9), 1374Plastic Antibodies: Molecular Recognition with Imprinted Polymers. An Introductory Polymer Chemistry Laboratory Investigation
Gregory T. Rushton , Brian Furmanski and Ken D. ShimizuJournal of Chemical Education2005 82 (9), 1374Molecularly-imprinted polymers have recently attracted considerable attention as alternatives to conventional biological and synthetic molecular receptors owing to their facile preparation, versatility, and stability. Presented is an investigation of the ...
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- Received: August 03, 2009
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