Aerogel based on nanoporous aluminium ferrocenyl diphosphinate metal-organic framework

Influence of the Substituent’s Size in the Phosphinate Group on the Conformational Possibilities of Ferrocenylbisphosphinic Acids in the Design of Coordination Polymers and Metal–Organic Frameworks

“…It is interesting to compare the packaging of 1 with trivalent metal. In the case of iron (III) and aluminum (III), we were unable to obtain crystals, only aerogels of Fe(III) [ 53 ] and Al(III) [ 59 ] were formed. However, in the case of lanthanides, a crystalline structure of a 2D polymer was obtained.…”

“…Starting materials 1,1′-ferrocenylenbis( H -phosphinic) acid 1 (H 2 fcd H p), 1,1′-ferrocenylenbis(metylphosphinic) acid 2 (H 2 fcd Me p), 1,1′-ferrocenylenbis(phenylphosphinic) acid 3 (H 2 fcd Ph p) were prepared according to procedure mentioned in the literature [ 46 ]. Their derivatives 1a and 3a [ 47 ], 2a [ 48 ], 4a and 4b [ 51 ], 5a [ 54 ], 5c [ 54 ], 7 [ 54 , 58 ], 8a – d [ 54 ] , 9a , b [ 63 ], and Al or Fe aerogels [ 58 , 59 ] were prepared according to procedures mentioned in the literature. All the other chemicals and solvents in the synthesis were reagent grade and used as received.…”

“…The remaining mobile proton of the phosphinate group forms a strong intramolecular hydrogen bond with the P=O phosphinate group of the neighboring ligand.It is interesting to compare the packaging of 1 with trivalent metal. In the case of iron (III) and aluminum (III), we were unable to obtain crystals, only aerogels of Fe(III)[53] and Al(III)[59] were formed. However, in the case of lanthanides, a crystalline structure of a 2D polymer was obtained.…”

“…The aerogel have a colloidal microstructure rather than a polymeric one, with a surface area of about 671 m 2 /g. [59] Aerogel Fe N2 is absorbed in the cavities, showing an isotherm typical of porous powders. The BET surface area is 617 m 2 /g with a significant pore volume.…”

The Phosphinate Group in the Formation of 2D Coordination Polymer with Sm(III) Nodes: X-ray Structural, Electrochemical and Mössbauer Study

“…Earlier in our group, only discrete molecules based on Fe (III) and 1,1′-ferrocendiyl-bis(phenylphosphinic) acid were obtained as a ligand with a chelating type of metal-ligand coordination [ 22 , 23 ]. The use of trivalent metals such as Al (III) and Fe (III) with 1,1′-ferrocendiyl-bis( H -phosphinic) acid results in the formation of porous MOFs as aerogels of unknown structure [ 24 , 25 ]. Therefore, the study of the complex formation of ferrocenyl phosphinates with trivalent lanthanides leaves a chance to obtain coordination polymers due to the implementation of a different type of metal-ligand interaction.…”