MIPs logo MIPdatabase      MIP2020 Conference logo Use this space
Custom Search
Reference type: Journal
Authors: Gndogdu N, Coskun M
Article Title: Kinetic study for adsorption of α-naphtholphthalein onto silica gel surface-imprinted polymer and non-imprinted polymer.
Publication date: 2016
Journal: Journal of Macromolecular Science, Part A
Volume: 53
Issue: (12)
Page numbers: 734-740.

Abstract: In this study, the molecular imprinting polymer (MIP) was prepared using α-naphtholphthalein as a template, 2-(diethylamino)ethyl acrylate as a functional monomer and ethylene glycol dimethacrylate as a crosslinking agent by aid of free radical polymerization onto surfaces of vinyltrimethoxysilane modified silica gel. The MIP was extracted with acetonitrile for overnight to remove the template molecule from the MIP. Non-imprinted polymer (NIMP) was synthesized using the same materials except α-naphtholphthalein as template molecule. α-Naphtholphthalein adsorption on surfaces of the both polymer was studied at three different temperatures (19 C, 25 C and 35 C). It was observed that the adsorption capacity increased with increasing temperature and with time. The time required to reach the equilibrium for two polymers and all temperature was accepted to be nearly 6 h. The saturated adsorption amounts at the equilibrium were found as 120 mg/g, 123 mg/g and 127 mg/g at 19 C, 25 C and 35 C, respectively, for MIP, and 78 mg/g, 98 mg/g and 120 mg/g at 19 C, 25 C and 35 C, respectively, for NIMP. The mechanism of adsorption of α-naphtholphthalein onto MIP and NIMP is nearly appropriate to pseudo-first-order kinetic model with an activation energy of 11.63 kJ/mol for MIP, and 23.69 kJ/mol for NIMP. Thermodynamic parameters of activated complex in the adsorption process showed that the adsorption was carried out with an endothermic activation enthalpy, large negative entropy changes and the positive values of Δ G* that the adsorption processes is not favorable
Template and target information: α-naphtholphthalein
Author keywords: α-Naphtholphthalein, molecular imprinting, adsorption, kinetics, activation parameters

  Mister Benzene Leaving card  Chemistry peptide mug  Beach bunny periodic table shirt

Molecules Special Issue call      Appeal for information


Join the Society for Molecular Imprinting
Logo of the Society for Molecular Imprinting

New items RSS feed
new items RSS feed  View latest updates

Sign-up for e-mail updates:
Choose between receiving an occasional newsletter or more frequent e-mail alerts.
Click here to go to the sign-up page.

Is your name elemental or peptidic? Enter your name and find out by clicking either of the buttons below!
Other products you may like:
view listings for MIP books on eBay:

Mickey Mouse 90th Anniversary banner