Piron E, Domard A
Laboratoire d'études des Matériaux Plastiques et des Biomatériaux (UMR CNRS 5627), Université Claude Bernard, Villeurbanne, France.
Int J Biol Macromol. 1998 Feb;22(1):33-40. doi: 10.1016/s0141-8130(97)00083-4.
In this part of the study--understanding the mechanism of interaction between chitosan and uranyl ions, we confirmed the restrictive role of polymer crystallinity on uranyl sorption capacity. The saturation of the polymer by uranyl ions showed that approximately 1 mol of uranyl ions was sorbed for 2 mol of amino groups contained in the amorphous domain. This result can be related to the intrinsic properties of chitosan. Desorption experiments are in favour of strong interaction, in fact, no desorption was observed whatever the experimental conditions. Spectroscopic characterization was performed on complexes in solution and in the solid state. U.V.-visible spectrophotometric experiments showed that a unique type of complex was formed. FT-IR spectroscopy allowed us to observe the appearance of a new band at 1525 cm of amide II type and led us to conclude the formation of a unique complex by the coordination with chitosan amino groups.
在本研究的这一部分——理解壳聚糖与铀酰离子之间的相互作用机制时，我们证实了聚合物结晶度对铀酰吸附能力的限制作用。铀酰离子使聚合物饱和表明，对于无定形区域中所含的2摩尔氨基，大约吸附了1摩尔铀酰离子。这一结果可能与壳聚糖的固有性质有关。解吸实验表明存在强相互作用，事实上，无论实验条件如何，均未观察到解吸现象。对溶液和固态的配合物进行了光谱表征。紫外可见分光光度实验表明形成了一种独特类型的配合物。傅里叶变换红外光谱使我们能够观察到在1525 cm处出现酰胺II型新谱带，并使我们得出结论，通过与壳聚糖氨基配位形成了一种独特的配合物。
