Synthesis and characterization of metal carboxyalkylphosphonates hybrid materials
- Additional Document Info
- View All
Several carboxyalkylphosphonate hybrid materials have been prepared under hydrothermal conditions: Mn2(OH)(O3PCH2CO 2)1/2H2O, Mn2(OH)(O3PCH 2CO2), Al3(OH)3(O 3PCH2CH2CO2)2 3H2O, Pb5(O3PCH2CH 2CO2)2(O3PCH2CH 2COOH)2 and Pb3(O3PCH 2CH2CO2)2. The influence of some variables in the syntheses such as pH or metal/phosphonic acid molar ratios have been examined. Mn2(OH)(O3PCH2CO 2)1/2H2O crystallizes in a triclinic cell with parameters a=8.405 , b=8.789 , c=4.910 , =90.71, =98.58, =103.68and V=348.6 3. Its dehydration lead to Mn2(OH)(O 3PCH2CO2), which unit cell has also been determined: a=8.307 , b=8.322 , c=4.940 , =103.31, =98.81, =80.79and V=325.6 3. The diffraction data suggest a layered structure. Al 3(OH)3(O3PCH2CH2CO 2)23H2O crystallizes in a monoclinic unit cell with a=10.534 , b=7.880 , c=10.320 , =109.86and V=805.7 3. Its X-ray powder pattern and the spectroscopic data are consistent with a pillared layered structure. Finally, Pb5(O3PCH2CH2CO 2)2(O3PCH2CH2COOH) 2 is monoclinic with a=11.889(1) , b=12.746(1) , c=9.835(1) , =114.081(2), V=1360.6(2) 3, Z=2, space group P21/c. Its structure has been solved from single crystal data, R1=0.069, and shows a pillared layered framework. There are two types of carboxyethylphosphonate chains, one being protonated which is pillaring the layers and the other chain is twisted and bonded to a unique inorganic layer through both carboxylate and phosphonate moieties. Thermal and IR data for these compounds are reported and discussed. 2004 Elsevier SAS. All rights reserved.
author list (cited authors)
Gomez-Alcantara, M. M., Cabeza, A., Aranda, M., Guagliardi, A., Mao, J. G., & Clearfield, A.
complete list of authors
Gómez-Alcántara, M Mar||Cabeza, Aurelio||Aranda, Miguel AG||Guagliardi, Antonietta||Mao, Jiang G||Clearfield, Abraham