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A Lamellar Coordination Polymer with Remarkable Catalytic Activity
Author(s) -
Mendes Ricardo F.,
Antunes Margarida M.,
Silva Patrícia,
Barbosa Paula,
Figueiredo Filipe,
Linden Anthony,
Rocha João,
Valente Anabela A.,
Almeida Paz Filipe A.
Publication year - 2016
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.201602157
Subject(s) - cyclohexanone , styrene oxide , catalysis , benzaldehyde , chemistry , lamellar structure , polymer , solvent , polymer chemistry , oxide , styrene , inorganic chemistry , organic chemistry , copolymer , crystallography
A positively charged lamellar coordination polymer based on a flexible triphosphonic acid linker is reported. [Gd(H 4 nmp)(H 2 O) 2 ]Cl ⋅ 2 H 2 O ( 1 ) [H 6 nmp=nitrilotris(methylenephosphonic acid)] was obtained by a one‐pot approach by using water as a green solvent and by forcing the inclusion of additional acid sites by employing HCl in the synthesis. Compound 1 acts as a versatile heterogeneous acid catalyst with outstanding activity in organic reactions such as alcoholysis of styrene oxide, acetalization of benzaldehyde and cyclohexanaldehyde and ketalization of cyclohexanone. For all reaction systems, very high conversions were reached (92–97 %) in only 15–30 min under mild conditions (35 °C, atmospheric pressure). The coordination polymer exhibits a protonic conductivity of 1.23×10 −5 S cm −1 at 98 % relative humidity and 40 °C.