Novel Calcium Carboxyphosphonate/polycarboxylate Inorganic−Organic Hybrid Materials from Demineralization of Calcitic Biomineral Surfaces

Abstract

Dissolution of biologically important sparingly soluble salts, such as calcium carbonate and calcium oxalate, is possible by use of carboxyl- and carboxyl/phosphonate-bearing, anionic additives, citrate, malate, carboxyphosphonate, and butane tetracarboxylate. Calcium-containing dissolution products have been identified, characterized, and independently synthesized. These are polymeric materials composed of calcium and the additive as the ligand. Their full characterization was carried out by single-crystal X-ray crystallography and other techniques.

Chapter 14. Structural Diversity in Metal Phosphonate Frameworks: Impact on Applications

“…Among the battery of anionic ligands available for the construction of inorganic-organic hybrids, polycarboxylates are predominant. [142][143][144][145][146][147][148][149][150] Polyphosphonates have also attracted significant interest. 3,6,40,64 because they exhibit a number of similarities, but also differences, to the carboxylates.…”

Revisiting the dissolution kinetics of limestone - experimental analysis and modeling

“…18 The use of additives such as polycarboxylates, hydrocarboxylates, and carboxyphosphonates has been shown to efficiently improve the demineralization of the biopolymers containing CaCO 3 under conditions that do not damage the biopolymers. 18 Additives such as ethylenediamine tetraacetate have been employed to assist in the dissolution of calcite deposits in petroleum wells or to remove scales from boilers and heat exchangers, since the use of strong acids is avoided due to possible damage to the equipment. 19 Moreover, organic additives are also employed in the dissolution of CaCO 3 scale deposits during chemical water treatment.…”

“…A common approach has been to study limestone dissolution in an acidic environment by adding strong acids such as HCl 2 or H 2 SO 4 . However, studies concerning demineralization of biopolymers containing CaCO 3 have required milder conditions with respect to the employment of strong acids in order to avoid damaging the mineral and organic phases . The use of additives such as polycarboxylates, hydrocarboxylates, and carboxyphosphonates has been shown to efficiently improve the demineralization of the biopolymers containing CaCO 3 under conditions that do not damage the biopolymers .…”

“…However, studies concerning demineralization of biopolymers containing CaCO 3 have required milder conditions with respect to the employment of strong acids in order to avoid damaging the mineral and organic phases . The use of additives such as polycarboxylates, hydrocarboxylates, and carboxyphosphonates has been shown to efficiently improve the demineralization of the biopolymers containing CaCO 3 under conditions that do not damage the biopolymers . Additives such as ethylenediamine tetraacetate have been employed to assist in the dissolution of calcite deposits in petroleum wells or to remove scales from boilers and heat exchangers, since the use of strong acids is avoided due to possible damage to the equipment .…”

Crystal structure of aquatris{μ-N-[bis(diethylamino)phosphoryl]-2,2,2-trichloroacetamidato-κ3O,O′:O}calciumsodium

“…In recent years, the interest of many researchers has been focused on metal-phosphorus containing chelates and their usefulness as reagents (principally the alkali metal derivatives) and as potential precursors (the alkaline earth derivatives) for chemical vapor deposition (CVD) (Hanusa, 2003), thin films (Hitzbleck et al, 2004;Demadis et al, 2009Demadis et al, , 2010, antitumor activity (Liu et al, 2012) and as models for calcium-binding proteins (bearing biologically relevant ligands) (Hoang et al, 2003).…”