NMR investigations of Co(III) coordination compounds oriented in a dilute lyotropic liquid crystal

✍ Scribed by Giorgio Pellizer; Fioretta Asaro; Barbara Pergolese

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 177 KB
• Volume: 42
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.1420

✦ Synopsis

Abstract

A swollen lamellar phase, based on sodium dodecyl sulfate, pentanol and NaBr brine, was examined by means of NMR spectroscopy of isotopes with quadrupolar characteristics, namely ^2^H, ^17^O, ^23^Na and ^81^Br, present at natural abundance. Such a dilute lyotropic liquid crystal was capable of inducing a preferential orientation of the cobalt coordination compounds [Co(en)~3~]^3+^ and Co(acac)~3~, the ^59^Co NMR signals of which displayed quadrupolar splittings. Moreover, it imparted alignment in the magnetic field to the organocobaloxime [ClCD~2~Co(Hdmg)~2~H~2~O], as shown by the quadrupolar splitting of the deuterium of the axial ligand. Copyright © 2004 John Wiley & Sons, Ltd.