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A Calix[5]arene‐Based Heterotetratopic Host for Molecular Recognition of Long‐Chain, Ion‐Paired α,ω‐Alkanediyldiammonium Salts
Author(s) -
Garozzo Domenico,
Gattuso Giuseppe,
Notti Anna,
Pappalardo Andrea,
Pappalardo Sebastiano,
Parisi Melchiorre F.,
Perez Marta,
Pisagatti Ilenia
Publication year - 2005
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200500985
Subject(s) - dication , chemistry , hydrogen bond , ion , calixarene , selectivity , chloride , chain (unit) , side chain , molecular recognition , combinatorial chemistry , molecule , organic chemistry , polymer , physics , astronomy , catalysis
The anions went in two by two : Separate ion‐pair binding of nano‐sized α,ω‐alkanediyldiammonium dichloride salts is achieved in organic media with high efficiency and selectivity by a heterotetratopic receptor that comprises two converging calix[5]arene units to tightly encapsulate the linear dication, as well as two ureido side functions to simultaneously bind the chloride counteranions through hydrogen bonding (see picture).