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Sulfonated Polymethylsiloxane as an Additive for Selective Calcium Oxalate Crystallization

Sulfonated Polymethylsiloxane as an Additive for Selective Calcium Oxalate Crystallization

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NEIRA-CARRILLO, Andrónico, Fabian LUENGO-PONCE, Patricio VÁSQUEZ-QUITRAL, Mehrdad YAZDANI-PEDRAM, Maria Soledad FERNÁNDEZ, Helmut CÖLFEN, José Luis ARIAS, 2015. Sulfonated Polymethylsiloxane as an Additive for Selective Calcium Oxalate Crystallization. In: European Journal of Inorganic Chemistry. 2015(7), pp. 1167-1177. ISSN 0009-2940. eISSN 1099-0682. Available under: doi: 10.1002/ejic.201402063

@article{NeiraCarrillo2015Sulfo-30394, title={Sulfonated Polymethylsiloxane as an Additive for Selective Calcium Oxalate Crystallization}, year={2015}, doi={10.1002/ejic.201402063}, number={7}, volume={2015}, issn={0009-2940}, journal={European Journal of Inorganic Chemistry}, pages={1167--1177}, author={Neira-Carrillo, Andrónico and Luengo-Ponce, Fabian and Vásquez-Quitral, Patricio and Yazdani-Pedram, Mehrdad and Fernández, Maria Soledad and Cölfen, Helmut and Arias, José Luis} }

Vásquez-Quitral, Patricio Neira-Carrillo, Andrónico Fernández, Maria Soledad Neira-Carrillo, Andrónico Arias, José Luis Arias, José Luis Luengo-Ponce, Fabian Fernández, Maria Soledad Vásquez-Quitral, Patricio 2015 2015-03-18T13:14:59Z Sulfonated and fluorescent polymethylsiloxanes (SO<sub>3</sub>H-PMS) were synthesized, and their effect as additives on in vitro calcium oxalate (CaOx) crystallization was evaluated. SO<sub>3</sub>H-PMS was prepared by hydrosilylation and sulfonation reactions with poly(dimethylsiloxane-co-hydrogenmethylsiloxane) (PDMS-co-PMHS). Several analytical tools were used to investigate the morphology, crystal structure, and chemical contents of the harvested CaOx crystals. Varying the concentration of SO<sub>3</sub>H-PMS induces a transition of CaOx monohydrate (COM) with expanded multilayer and circular stacked-sheet morphologies as well as of the bipyramidal CaOx dihydrate (COD) crystals in three crystallization procedures. Energy-dispersive X-ray spectroscopy (EDS) and XRD allowed detecting the presence of Si (0.2–1.0°wt.-%), which stems from SO<sub>3</sub>H-PMS adsorbed on CaOx, and the selective formation of phases of COM and COD. We demonstrated that the presence of anionic moieties on the SO<sub>3</sub>H-PMS backbone and their concentration were crucial to control the crystal type, morphology, crystal size, and chemical composition. 2015-03-18T13:14:59Z eng Luengo-Ponce, Fabian Cölfen, Helmut Cölfen, Helmut Yazdani-Pedram, Mehrdad Yazdani-Pedram, Mehrdad Sulfonated Polymethylsiloxane as an Additive for Selective Calcium Oxalate Crystallization

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