2001 Volume 40 Issue 3 Pages 173-178
Increasing attention has been focused on the interaction between organic compounds and layered double hydroxides (LDHs) from viewpoints of separation, recover and concentration of organic substances, removal of harmful substances, retention of useful components, synthesis of porous materials etc. Recently, the intercalation of the biomolecules in living systems such as amino acids, polypeptides, sugars and nucleic acids into LDHs was also attempted from viewpoint of earth chemistry in which LDHs were regarded as anionic clays. In this article, the studies on the intercalation of the biomolecules mentioned above into LDHs were carried out and summarized together with the results of the recent researches on the intercalation of amino acids and sugars. As the results, not only anion but zwitterion of amino acids and non-ionic molecule of sugars were intercalated into the interlayer of Zn-Al and Mg-Al LDHs with indicating the selectivity by the kind of side chain group in the case of amino acids and by the number and configuration of hydroxide group in the case of sugars. It was also found that these organic compounds were deintercalated by the ion exchange with carbonate ion in which the parents LDHs were regenerated.
