A Lamellar Coordination Polymer with Remarkable Catalytic Activity

authors	Mendes, RF; Antunes, MM; Silva, P; Barbosa, P; Figueiredo, F; Linden, A; Rocha, J; Valente, AA; Paz, FAA
nationality	International
journal	CHEMISTRY-A EUROPEAN JOURNAL
author keywords	conducting materials; heterogeneous catalysis; layered materials; lanthanides; metal-organic frameworks
keywords	METAL-ORGANIC FRAMEWORKS; ONE-POT ACETALIZATION; EFFICIENT ACETALIZATION; HETEROGENEOUS CATALYSTS; PROTON CONDUCTIVITY; LINKER SUBSTITUTION; MAGNETIC-PROPERTIES; DIMETHYL ACETALS; LEWIS ACIDITY; Y ZEOLITES
abstract	A positively charged lamellar coordination polymer based on a flexible triphosphonic acid linker is reported. [Gd(H(4)nmp)(H2O)(2)]Cl center dot 2H(2)O (1) [H(6)nmp=nitrilotris(methylene-phosphonic 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 degrees C, atmospheric pressure). The coordination polymer exhibits a protonic conductivity of 1.23 x 10(-5) Scm(-1) at 98% relative humidity and 40 degrees C.
publisher	WILEY-V C H VERLAG GMBH
issn	0947-6539
year published	2016
volume	22
issue	37
beginning page	13136
ending page	13146
digital object identifier (doi)	10.1002/chem.201602157
web of science category	Chemistry, Multidisciplinary
subject category	Chemistry
unique article identifier	WOS:000383763200028