Reactivity of a New Zirconium Phosphonate Phase, Zr2(O3P-CH2CH2-bipyridinium-CH2CH2-PO3)X6·2H2O, Toward Organic and Inorganic Monophosphonates

✍ Scribed by Lori A. Vermeulen; Scott J. Burgmeyer

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 289 KB
• Volume: 147
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1999.8411

✦ Synopsis

We report that zirconium viologen diphosphonate, (Zr 2 (O 3 P-CH 2 CH 2 -bipyridinium-CH 2 CH 2 -PO 3 )X 6 ' 2H 2 O), where X ‫؍‬ halide ion, ZrVP, will react with a variety of phosphonates (H 2 O 3 P-R, where R ‫؍‬ OH, H, CH 3 , C 6 H 5 ) under mild conditions, producing a disordered porous phase. This is in sharp contrast to the observed reactivity of the more common zirconium phosphonate phases: the -phase group (IVB) layered phosphonates Zr(O 3 PR) 2 (whose structures are based upon -(Zr(O 3 POH) 2 ' H 2 O), -ZrP) are resistant to reaction with monophosphonates while -Zr(O 4 P)(O 2 P(OH) 2 ) ' 2H 2 O, -ZrP, undergoes topotactic ligand exchange with mono-and di-phosphonates to form ordered porous materials. We follow the reaction by X-ray powder di4raction and IR and UV spectroscopies and investigate the porous nature of the resulting solids through ion-exchange and N 2 adsorption experiments.