Communication
Selective Retention of Methanol over Ethanol by a Cyclen-Based Cryptand/Copper(II) Complex
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†Department of Chemistry, Faculty of Science, and‡Research Center for Materials with Integrated Properties, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan
Inorg. Chem., Article ASAP
DOI: 10.1021/ic4021417
Publication Date (Web): October 8, 2013
Copyright © 2013 American Chemical Society
*E-mail: habata@chem.sci.toho-u.ac.jp.
Abstract
A cyclen-based cryptand (2) was prepared in a two-step synthesis from dioxocyclen. When a Cu(CF3SO3)2 complex with 2 was prepared in methanol, the 2/Cu(CF3SO3)2 complex incorporated one methanol in the cavity formed by the diethyleneoxy unit and the NH group of the cyclen. When prepared in ethanol, the 2/Cu(CF3SO3)2 complex similarly incorporated one ethanol. Cold electrospray ionization mass spectrometry (CSI-MS) of the2/Cu(CF3SO3)2/alcohol complexes selectively retains methanol over ethanol under CSI-MS conditions.
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