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High-resolution nuclear magnetic resonance spectroscopy studies of polysaccharides crosslinked by sodium trimetaphosphate: a proposal for the reaction mechanism

Stéphane Lack 1 Virginie Dulong 1 Luc Picton 1 Didier Le Cerf 1 Eric Condamine 2
1 PBM - Polymères, biopolymères, membranes
2 COBRA - Chimie Organique et Bioorganique : Réactivité et Analyse
Abstract : An NMR spectroscopy study (31P, 1H, 13C) of the postulated crosslinking mechanism of sodium trimetaphosphate (STMP) on polysaccharides is reported using methyl α-d-glucopyranoside as a model. In a first step, reaction of STMP with Glc-OMe gives grafted sodium tripolyphosphate (STPPg). On the one hand, STTPg can react with a second alcohol functionality to give a crosslinked monophosphate. On the other hand, a monophosphate (grafted phosphate) could be obtained by alkaline degradation of STPPg. NMR spectroscopy allows to detect the various species formed and to obtain the crosslinking density of STMP–polysaccharides hydrogels.
Keywords : 31P Nuclear magnetic resonance spectroscopy Sodium trimetaphosphate Pullulan Hydrogels Crosslinking mechanism
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Journal articles
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https://hal-normandie-univ.archives-ouvertes.fr/hal-01866833
Contributor : Luc Picton <>
Submitted on : Monday, September 3, 2018 - 4:25:33 PM
Last modification on : Thursday, July 2, 2020 - 3:29:25 AM

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COMUE-NORMANDIE | CNRS | INSA-ROUEN | UNIROUEN | INC-CNRS | INSA-GROUPE | PBS | ENSICAEN | UNILEHAVRE | UNICAEN

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Stéphane Lack, Virginie Dulong, Luc Picton, Didier Le Cerf, Eric Condamine. High-resolution nuclear magnetic resonance spectroscopy studies of polysaccharides crosslinked by sodium trimetaphosphate: a proposal for the reaction mechanism. Carbohydrate Research, Elsevier, 2007, 342 (7), pp.943-953. ⟨10.1016/j.carres.2007.01.011⟩. ⟨hal-01866833⟩

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