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Effective Encapsulation of C 60 by Metal–Organic Frameworks with Polyamide Macrocyclic Linkers
Author(s) -
SauraSanmartin Adrian,
MartinezCuezva Alberto,
MarinLuna Marta,
Bautista Delia,
Berna Jose
Publication year - 2021
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.202100996
Subject(s) - amide , metal organic framework , polyamide , fullerene , rotaxane , materials science , monoclinic crystal system , polymer , polymer chemistry , imidazole , chemistry , crystal structure , supramolecular chemistry , crystallography , organic chemistry , adsorption
A flexible benzylic amide macrocycle, functionalized with two carboxylic acid groups, was employed as the organic ligand for the preparation of robust copper(II)‐ and zinc(II)‐based metal–organic frameworks. These polymers crystallized in the C 2/ m space group of the monoclinic crystal system, creating non‐interpenetrated channels in one direction with an extraordinary solvent‐accessible volume of 46 %. Unlike metal–organic rotaxane frameworks having benzylic amide macrocycles as linkers, the absence of the thread in these novel reticular materials causes a decrease of dimensionality and an improvement of pore size and dynamic guest adaptability. We studied the incorporation of fullerene C 60 inside the adjustable pocket generated between two macrocycles connected to the same dinuclear clusters, occupying a remarkable 98 % of the cavities inside the network. The use of these materials as hosts for the selective recognition of different fullerenes was evaluated, mainly encapsulating the smaller size fullerene derivative in several mixtures of C 60 and C 70 .