Molecularly imprinted adsorbents for positional isomer separation

Joshi, V. P. ; Kulkarni, M. G. ; Mashelkar, R. A. (1999) Molecularly imprinted adsorbents for positional isomer separation Journal of Chromatography A, 849 (2). pp. 319-330. ISSN 0021-9673

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2,4-Dihydroxybenzophenone (2,4-DHB) imprinted polymers were synthesized by surface imprinting technique, using allyl alcohol as the functional monomer. The polymers showed a very high selectivity for 2,4-DHB when compared with various positional isomers such as 2-HB, 2,2'-DHB, 4,4'-DHIB and 4,4'-DMB. Solvents were found to affect the selectivity as well as sorption capacity in the case of surface imprinted polymers. The selectivities decreased drastically when the imprint cavity was blocked. This validated the importance of the cavity and the rebinding interactions in governing the selectivity in the case of MIPs. The surface imprinted polymers also showed a high selectivity under non-equilibrium conditions thereby making them suitable adsorbents for industrial separations.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:17120
Deposited On:16 Nov 2010 08:26
Last Modified:04 Jun 2011 08:17

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