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Complexation and Self-Assembling of Sulfonatomethylated Calix[4]resorcinarene with Both Organic and Lanthanide Ions in Aqueous Media |
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| Authors: | Rustem R. Amirov Asiya R. Mustafina Zuleikha T. Nugaeva Svetlana V. Fedorenko Ella Kh. Kazakova Alexandr I. Konovalov Wolf D. Habicher |
| Affiliation: | 1. Kazan State University, Kremlevskaya str.18, Kazan, 420008, Russia 2. Kazan Scientific Center of the Russian Academy of Sciences, A.E. Arbuzov Institute of Organic and Physical Chemistry, Arbusov Str. 8, Kazan, 420088, Russia 3. Technische Universit?t Mommsenstr.13, 01062, Dresden, Institute für, Organische Chemie, Germany |
| Abstract: | The stoichiometry and binding constant of the paramagnetic lanthanide ion(Gd3+) with sulfonatomethylated calix[4]resorcinarene (H8Xna4) were evaluated from the NMR relaxation data. Both 1H NMR spectroscopy and NMR relaxation data indicate that interaction of tetramethylammonium (TEMA) and N-methylpyridinium (MePy) cations with H8Xna4 in the presence of Ln3+ (Lu3+ or Gd3+) results in theformation of ternary complexes [Ln(G)H8X] with lanthanide ions,coordinated via sulfonate groups and organic cation included intothe cavity of H8Xna4. The inclusion of long-chainedN-decyl-(DePy) and N-cetylpyridinium (CPy) ions into H8Xna4 cavity leads to self-assembling which can be revealed by NMR relaxation method with Gd3+ probe ions. The excess of alkylpyridinium or TEMA cations leads to disassembling of (Gd)n(H8X)m(RPy)maggregates. |
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