Derivatized lamellar phosphates and phosphonates of M(IV) ions

Dines, Martin B.; Digiacomo, Peter M.

doi:10.1021/ic50215a022

Cited by 232 publications

(88 citation statements)

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“…The remaining mass of~40% can be assigned to cobalt phosphonate species (~35%). It has been observed that metal phosphonates are stable up to 650˝C and higher [57]. Comparison of the experimental powder X-ray diffractogram for 2 with the simulation from the single-crystal X-ray dataset ( Figure 6) shows that the investigated single crystal was representative of the bulk amount when one takes into account the preferential orientation of the column-or rod-shaped crystals of 2 ( Figure S1 in Supplementary Material) on the flat sample holder.…”

Section: Resultsmentioning

confidence: 97%

Charge-Assisted Hydrogen-Bonded Networks of NH4+ and [Co(NH3)6]3+ with the New Linker Anion of 4-Phosphono-Biphenyl-4′-Carboxylic Acid

Heering¹,

Nateghi²,

Janiak³

2016

Crystals

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Abstract:The new linker molecule 4-phosphono-biphenyl-4 1 -carboxylic acid (H 2 O 3 P-(C 6 H 4 ) 2 -COOH, H 3 BPPA) has been structurally elucidated in hydrogen-bonded networks with the ammonium cation NH 4 (H 2 BPPA)(H 3 BPPA) (1) and the hexaamminecobalt(III) cation [Co(NH 3 ) 6 ](BPPA)¨4H 2 O (2). The protic O-H and N-H hydrogen atoms were found and refined in the low-temperature single-crystal X-ray structures. The hydrogen bonds in both structures are so-called charge-assisted; that is, the H-bond donor and/or acceptor carry positive and/or negative ionic charges, respectively.The H-bonded network in 1 consists of one formally mono-deprotonated 4-phosphonato-biphenyl-4 1 -carboxylic acid group; that is, a H 2 BPPA´anion and a neutral H 3 BPPA molecule, which together form a 3D hydrogen-bonded network. However, an almost symmetric resonance-assisted hydrogen bond (RAHB) bond [O¨¨¨H = 1.17 (3) and 1.26 (3) Å, O¨¨¨H¨¨¨O = 180 (3)˝] signals charge delocalization between the formal H 2 BPPA´anion and the formally neutral H 3 BPPA molecule. Hence, the anion in 1 is better formulated as [H 2 BPPA¨¨¨H¨¨¨H 2 BPPA]´. In the H-bonded network of 2 the 4-phosphonato-biphenyl-4 1 -carboxylic acid is triply deprotonated, BPPA 3´. The [Co(NH 3 ) 6 ] 3+ cation is embedded between H-bond acceptor groups, -COO´and -PO 3´a nd H 2 O molecules. The incorporation of sixteen H 2 O molecules per unit cell makes 2 an analogue of the well-studied guanidinium sulfonate frameworks.

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Section: Resultsmentioning

confidence: 97%

Charge-Assisted Hydrogen-Bonded Networks of NH4+ and [Co(NH3)6]3+ with the New Linker Anion of 4-Phosphono-Biphenyl-4′-Carboxylic Acid

Heering¹,

Nateghi²,

Janiak³

2016

Crystals

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“…Finally, the product was ltered, washed and dried at 323 K. Sample 4 was prepared by slow decomposi tion of a titanium(IV) uorocomplex in the presence of phenylphosphonic acid, following the procedure described by Dines and Digaicomo. 5) The phenyl group was readily sulfonated. 3) The sulfonation reaction was carried out by adding 3 g of Sample 1 (8.34 mmol) to 17 mmol of fuming sulfuric acid (15.13 g, 20÷, Aldrich Chem.).…”

Section: Methodsmentioning

confidence: 99%

Synthesis of a Microporous Layered Titanium Phenylphosphonate in Presence of Sodium Dodecylsulfate

Mal

Fujiwara

Yamada

et al. 2003

J. Ceram. Soc. Japan

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“…The focus of this article, zirconium methylphosphonate, possesses the highest thermal stability and largest specific surface area among the reported zirconium phosphonates [19,28,29]. In 1982, Dines and Griffith investigated the surface texture and crystallinity of zirconium bis(methylphosphonate) in detail [30].…”

Section: Introductionmentioning

confidence: 99%