Microporous aluminum bisphosphonates

High valence 3p and transition metal based MOFs

“….) obtained under solvothermal conditions and lacking long range order have been reported, mostly by Clearfield et al 32,54,55 The authors proposed that local defects in the linkers are at the origin of the porosity of these solids.…”

Tin(iv) phosphonates: porous nanoparticles and pillared materials

“…There is no doubt that these types of group-four phosphonates have special growth patterns that distinguish them from compounds that crystallize. A proposed model of the structure of the pillared porous group-four metal bisphosphonates is required to supply answers to these observations: (1) The compounds produce nano-sized particles with minimal longrange order; (2) The pore sizes often exceed the interlayer spacing; (3) Choice of solvent can alter the pore size and pore regularity; (4) The use of phenyl rings as spacers does not increase the interlayer distance of the monophenyl cross-linked Sn(IV) derivatives; (5) Often the ratio of phosphorus to M(IV) exceeds two. We had earlier proposed a model for these crosslinked zirconium materials based on crystal growth that explained several aspects of their character.…”

“…3 Similar compounds have been prepared with aluminium. 5 The aluminium system of compounds is more complex than those of zirconium, as phases containing hydroxyl groups and/or retention of protons by the phosphonic acid are also obtained and therefore will be the subject of another paper. Our latest results with tin(IV) phosphonates form the subject of this report.…”

New lanthanide phosphonates structures obtained using XRPD data

“…] allow the construction of metal phosphonate materials with new architectures, including open framework structures [3,4] and porous pillared layered structures [5,6] 2 ], with Ln = La, Pr, Sm, Tb and Er has been recently reported by our research group [7,8] and the crystal structure of the La compound was already published by Liu and collaborators [9]. Following with the work previously developed [10] we present here the results of the structural study for seven components of the family (Ln= La, Pr, Sm, Eu, Gd, Tb and Er) using their synchrotron XRPD data and the La X-ray single crystal data.…”