Forty Years of Ion Exchange Researches

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  • HAYASHITA Takashi
    Department of Materials and Life Sciences, Faculty of Science and Technology, Sophia University

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  • イオン交換研究と歩んだ40年

Abstract

<p>Looking back on the 40 years of ion exchange research, the studies mainly focusing on the supramolecular analytical reagents developed at Sophia University were summarized. The selective transduction of molecular recognition events into physical or chemical signals is a key concept for the design of novel supramolecular sensors. By using various combinations of fluorescent probes and azoprobes possessing the binding sites of phenylboronic acids and dipycolyl amines with cyclodextrins (CDs), the unique recognition functions for metal ions, sugars, and phosphate derivatives were achieved by CD complexes, chemically modified CD complexes, and CD gel complexes based on their synergistic functions. To realize a novel supramolecular chirality, the twisted structure of two ditopic azoprobes inside the CD was successfully controlled by multi-point recognition of guest ions in water. The CD nanogels and dendrimer nanoparticles having phenylboronic acid binding sites were found to discriminate the bacteria spacies. These unique functions of supramolecular CD complexes and nanogel sensors are reviewed in relation to their supramolecular structures.</p>

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