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Threading the Calix[5]arene Annulus
Author(s) -
Gattuso Giuseppe,
Notti Anna,
Parisi Melchiorre F.,
Pisagatti Ilenia,
Amato Maria E.,
Pappalardo Andrea,
Pappalardo Sebastiano
Publication year - 2010
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200902945
Subject(s) - threading (protein sequence) , thread (computing) , pairing , annulus (botany) , salt (chemistry) , chemistry , crystallography , ion , stereochemistry , materials science , computer science , organic chemistry , physics , condensed matter physics , biochemistry , composite material , programming language , protein structure , superconductivity
Slowly does it! Di‐ n ‐alkylammonium ions (such as 2⋅ H + ) thread the annulus of calix[5]arene 1 to yield stable [2]pseudorotaxanes. The ease of formation of this hitherto unknown family of interpenetrated supermolecules is predominantly determined by salt ion‐pairing effects, whereas the time course of the threading/dethreading process depends on the length of the cation alkylammonium chains.