A Lamellar Coordination Polymer with Remarkable Catalytic Activity. Issue 37 (9th August 2016)

• Record Type: Journal Article
• Authors: Mendes, Ricardo F.; Antunes, Margarida M.; Silva, Patrícia; Barbosa, Paula; Figueiredo, Filipe; Linden, Anthony; Rocha, João; Valente, Anabela A.; Almeida Paz, Filipe A.
• Is Part Of: Chemistry. Volume 22:Issue 37(2016)
• Page Start: 13136
• Page End: 13146
• Publication Date: 2016-08-09
• Subjects: conducting materials -- heterogeneous catalysis -- layered materials -- lanthanides -- metal–organic frameworks; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201602157
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: A positively charged lamellar coordination polymer based on a flexible triphosphonic acid linker is reported. [Gd(H4 nmp)(H2 O)2 ]Cl⋅ 2 H2 O (1 ) [H6 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. Compound1 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. Abstract : Layered catalyst : A lamellar Gd coordination polymer based on a flexible triphosphonic acid linker was obtained by a one‐pot approach by using water as a green solvent and forcing the inclusion of additional acid sites by employing HCl in the synthesis. It is 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 (see figure).