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Synthesis of a metal chelating monomer for radiation polymer dosimetry
Radiation Physics and Chemistry ( IF 2.9 ) Pub Date : 2021-03-01 , DOI: 10.1016/j.radphyschem.2020.109295
Alexis Wolfel , David Chacón , Marcelo R. Romero , Mauro Valente , Facundo Mattea

Abstract To enhance the performance of polymeric dosimeters it is necessary to design novel formulations considering the mechanisms that register the absorbed dose (e.g. induced polymerization) and the readout method. The combination of the advantages of polymeric dosimetry, such as response stability and high sensitivity in a tissue-equivalent material, together with the high optical absorbance commonly found in colored metal-ligand complexes, represents a promissory strategy to achieve new dosimetry systems with enhanced optical properties. Addressing this scope, herein this study reports the synthesis of a vinylic monomer that was polymerized for the first time induced by X-Ray radiation, being also capable of forming highly colored complexes with metal ions. The chelating monomer was obtained from glycidyl methacrylate and iminodiacetic acid, purified and fully characterized. Then, the reactivity of a monomeric system containing the obtained monomer, N-isopropylacrylamide and N,N'-methylenebisacrylamide was evaluated. Two different initiation methods, namely chemically initiated polymerization and X-ray promoted polymerization were compared. Finally, the ability of the obtained polymers to chelate Cu2+ ions and the corresponding changes in their optical properties were studied.

中文翻译:

用于辐射聚合物剂量测定的金属螯合单体的合成

摘要 为了提高聚合物剂量计的性能,有必要考虑记录吸收剂量(例如诱导聚合)和读出方法的机制来设计新配方。聚合物剂量测定的优点(例如组织等效材料的响应稳定性和高灵敏度)与有色金属配体复合物中常见的高吸光度相结合,代表了一种实现具有增强光学性能的新剂量测定系统的有希望的策略。特性。针对这一范围,本研究报告了首次由 X 射线辐射诱导聚合的乙烯基单体的合成,该单体还能够与金属离子形成高度着色的配合物。螯合单体由甲基丙烯酸缩水甘油酯和亚氨基二乙酸得到,纯化和充分表征。然后,评价包含所得单体、N-异丙基丙烯酰胺和N,N'-亚甲基双丙烯酰胺的单体体系的反应性。比较了两种不同的引发方法,即化学引发聚合和 X 射线促进聚合。最后,研究了所得聚合物螯合Cu2+离子的能力及其光学性质的相应变化。
更新日期:2021-03-01
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