Проведено комплексное исследование процесса самоорганизации при сливании низкоконцентрированных водных растворов N-ацетил-L-цистеина и ацетата серебра. Все стадии самоорганизации изучены c помощью измерения величины рН, методов вискозиметрии, УФ спектроскопии и динамического светорассеяния (ДСР). Установлено, что началом самосборки является замена водорода в меркаптогруппе аминокислоты на катион серебра с образованием молекулы меркаптида серебра (МС). Далее происходит образование цепочек вида (-Ag-S(NCys)-Ag-S(NCys)-), при этом происходит протонирование аминокислотных остатков N-ацетил-L-цистеина. Предложен механизм самоорганизации в водном растворе N-ацетил-L-цистеина и ацетата серебра (N-ацетилцистеин-серебряный раствор - НАЦ), заключающийся в образовании агрегатов типа «ядро-оболочка». «Ядро» агрегатов состоит из цепочек вида (-Ag-S(NCys)-Ag-S(NCys)-), «оболочка» агрегатов состоит из протонированных аминокислотных остатков. Связывание таких агрегатов происходит посредством образования связей с ацетат-анионами. A comprehensive study of the self-organization process during the draining of low-concentration aqueous solutions of N-acetyl-L-cysteine and silver acetate was carried out. All stages of self-organization have been studied using pH measurements, viscometry, UV spectroscopy, and dynamic light scattering (DLS). It was found that the first stage of self-assembly is the replacement of hydrogen in the mercapto group of an amino acid with a silver cation with the formation of a silver mercaptide (MS) molecule. Further, the formation of chains of the form (-Ag-S(NCys)-Ag-S(NCys)-) occurs, while excess electron density is retained in amino acid residues, leading to the interaction of chains with both silver cations and undissociated silver acetate molecules , with the formation of clusters. The mechanism of self-organization of the system as the formation of the aggregates of the «core-shell» type is proposed. The «core» consists of chains of the form (-Ag-S(NCys)-Ag-S(NCys)-), the «shell» consists of protonated N-acetyl-L-cysteine resides. Further bonding of aggregates into clusters occurs through free acetic acid anions.
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