Original title: Enantioseparation and estimation of racemization barriers of selected helquats and their derivatives by capillary electrophoresis using sulfated cyclodextrins as chiral selectors
Authors: Sázelová, Petra ; Koval, Dušan ; Severa, Lukáš ; Reyes Gutierrez, Paul Eduardo ; Jirásek, Michael ; Teplý, Filip ; Kašička, Václav
Document type: Papers
Conference/Event: CECE 2018. International Interdisciplinary Meeting on Bioanalysis /15./, Brno (CZ), 20181015
Year: 2018
Language: eng
Abstract: Anionic highly sulfated β- and γ-cyclodextrins (S-CDs) and single-isomer heptakis-(2,3-diacetyl-6-sulfato)-β-CD (14Ac-7S-β-CD) were used for chiral separation of [5], [6] and [7]-ring helquats and helquat styryl dyes by capillary electrophoresis (CE) in the background electrolyte composed of 22 mM NaOH/35 mM H3PO4, pH 2.4. The CE method was applied for monitoring of racemization of eight helquats and helical dyes. Rate constant k of conversion, half-life T1/2 of racemization, and activation Gibbs free energy ΔGǂ of interconversion of one enantiomer into the other were calculated from the dependence of natural logarithm of enantiomeric excess (ee) on time using linear regression analysis.
Keywords: capillary electrophoresis; helquats; racemization barrier
Project no.: GA17-10832S (CEP), GA18-02597S (CEP)
Funding provider: GA ČR, GA ČR
Host item entry: CECE 2018. 15th International Interdisciplinary Meeting on Bioanalysis, ISBN 978-80-904959-5-1

Institution: Institute of Organic Chemistry and Biochemistry AS ČR (web)
Document availability information: Fulltext is available at external website.
External URL: http://www.ce-ce.org/user_uploads/program/CECE%202018%20Proceedings_WOS.pdf
Original record: http://hdl.handle.net/11104/0291134

Permalink: http://www.nusl.cz/ntk/nusl-390681


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