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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Wright, Paul A.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2023Synthetic control of the defect structure and hierarchical extra-large-/small-pore microporosity in aluminosilicate zeolite SWYcitations
- 2019New directions in metal phosphonate and phosphinate chemistrycitations
- 2015Structural Origin of Unusual CO 2 Adsorption Behavior of a Small-Pore Aluminum Bisphosphonate MOFcitations
- 2014Stabilization of scandium terephthalate MOFs against reversible amorphization and structural phase transition by guest uptake at extreme pressurecitations
- 2013Elucidating the breathing of the metal-organic framework MIL-53(Sc) with ab initio molecular dynamics simulations and in situ X-ray Powder Diffraction Experimentscitations
- 2013Post-synthetic incorporation of nickel into CPO-27(Mg) to give materials with enhanced permanent porositycitations
- 2011A co-templating route to the synthesis of Cu SAPO STA-7, giving an active catalyst for the selective catalytic reduction of NO
- 2011A co-templating route to the synthesis of Cu SAPO STA-7, giving an active catalyst for the selective catalytic reduction of NOcitations
- 2010Assessing Molecular Transport Properties of Nanoporous Materials by Interference Microscopycitations
- 2009Lanthanide N,N '-piperazine-bis(methylenephosphonates) (Ln = La, Ce, Nd) that display flexible frameworks, reversible hydration and cation exchangecitations
- 2006Complex zeolite structure solved by combining powder diffraction and electron microscopycitations
- 2006Novel open-framework architectures in lanthanide phosphonatescitations
- 2002Control of structure, pore size and morphology of three-dimensionally ordered mesoporous silicas prepared using the dicationic surfactant [CH3(CH2)15N(CH3)2(CH 2)3N(CH3)3]BR2citations
- 2001Solid-state transformations of zinc 1,4-benzenedicarboxylates mediated by hydrogen-bond-forming molecules
Places of action
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article
Lanthanide N,N '-piperazine-bis(methylenephosphonates) (Ln = La, Ce, Nd) that display flexible frameworks, reversible hydration and cation exchange
Abstract
Hydrothermal syntheses of lanthanide bisphosphonate metal organic frameworks comprising the light lanthanides lanthanum, cerium and neodymium and N,N'-piperazine bis(methylenephosphonic acid) (H2L(1) and its 2-methyl and 2,5-dimethyl derivatives (H2L(2) and H2L(3)) gives three new structure types. At elevated starting pH (ca. 5 and above) syntheses give 'type I' materials with all metals and acids of the Study (MLnLxH(2)O, M = Na, K, Cs; Ln = La, Ce, Nd; x approximate to 4: KCeL(1) center dot 4H(2)O, C2/c, a = 23.5864(2) angstrom, b = 12.1186(2) angstrom, c = 5.6613(2) angstrom, beta = 93.040(2)degrees). The framework of structure type I shows considerable flexibility as the ligand is changed, due mainly to rotation around the -N-CH2- bond of the linker in response to steric considerations. Type I materials demonstrate cation exchange and dehydration and rehydration behaviour. Upon dehydration of KCeL center dot 4H(2)O, the space group changes to P2(1)/n, a = 21.8361(12) angstrom, b = 9.3519(4) angstrom, c = 5.5629(3) angstrom, beta = 96.560(4)degrees, as a result of a change of the piperazine ring from chair to boat configuration. When syntheses are performed at lower pH, two other structure types crystallise. With the 'non-methyl' ligand 1, type II materials result (LnL(1)H2L(1) center dot 4.5H(2)O: Ln = La, P-1, a = 5.7630(13) angstrom, b = 10.213(2) angstrom, c = 11.649(2) angstrom, alpha = 84.242(2)degrees, beta = 89.051(2)degrees, gamma = 82.876(2)degrees) in which one half of the ligands coordinate via the piperazine nitrogen atoms. With the 2-methyl ligand, structure type III crystallises (LnHL(2) center dot 4H(2)O: Ln = Nd, Ce, P2(1)/c, a = 5.7540(9) angstrom, b = 14.1259(18) angstrom, c = 21.156(5) angstrom, beta = 90.14(2)degrees) due to unfavourable steric interactions of the methyl group in structure type II. (C) 2009 Elsevier Inc. All rights reserved.