caa a22 4500 605545634 CHVBK 20210128100936.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s00723-015-0702-3 doi (NATIONALLICENCE)springer-10.1007/s00723-015-0702-3 EPR Spin Probe Study of Molecular Mobility and Structure of Aqueous Solutions and Gels of Polydiphenylenesulfophthalide [Elektronische Daten] [L. Wasserman, I. Barashkova, V. Vasil'ev, V. Papkov, S. Salazkin, A. Wasserman] The sizes and local mobility of nano-sized aggregates formed in aqueous solutions of polydiphenylenesulfophthalide before and after its treatment with alkali metal hydroxides were determined by the method of electron paramagnetic resonance (EPR) spectroscopy and the method of dynamic light scattering. Nano-aggregates possess a dense hydrophobic core whose local mobility is commensurable with the local mobility of solid polystyrene. The solubility of these aggregates is explained by the presence of hydrophilic groups (lyophilizing corona) in their outer layer. The hydrophobic core of nano-aggregates is not uniform; it contains a significant amount of less ordered ("defect”) regions. This is confirmed by the superposition of EPR spectra of spin probes. Dense non-uniform structures of aggregates are formed in diluted solutions and maintain their integrity during gel formation as the concentration of solution increases. Springer-Verlag Wien, 2015 Wasserman L. Emanuel Institute of Biochemical Physics, Russian Academy of Science, 4, Kosygina str., 119991, Moscow, Russia aut Barashkova I. Semenov Institute of Chemical Physics, Russian Academy of Science, 4, Kosygina str., 119991, Moscow, Russia aut Vasil'ev V. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Science, 28, Vavilova str., 119991, Moscow, Russia aut Papkov V. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Science, 28, Vavilova str., 119991, Moscow, Russia aut Salazkin S. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Science, 28, Vavilova str., 119991, Moscow, Russia aut Wasserman A. Semenov Institute of Chemical Physics, Russian Academy of Science, 4, Kosygina str., 119991, Moscow, Russia aut Applied Magnetic Resonance Springer Vienna 46/12(2015-12-01), 1409-1420 0937-9347 46:12<1409 2015 46 723 https://doi.org/10.1007/s00723-015-0702-3 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00723-015-0702-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wasserman L. Emanuel Institute of Biochemical Physics, Russian Academy of Science, 4, Kosygina str., 119991, Moscow, Russia aut NATIONALLICENCE 700 1- Barashkova I. Semenov Institute of Chemical Physics, Russian Academy of Science, 4, Kosygina str., 119991, Moscow, Russia aut NATIONALLICENCE 700 1- Vasil'ev V. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Science, 28, Vavilova str., 119991, Moscow, Russia aut NATIONALLICENCE 700 1- Papkov V. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Science, 28, Vavilova str., 119991, Moscow, Russia aut NATIONALLICENCE 700 1- Salazkin S. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Science, 28, Vavilova str., 119991, Moscow, Russia aut NATIONALLICENCE 700 1- Wasserman A. Semenov Institute of Chemical Physics, Russian Academy of Science, 4, Kosygina str., 119991, Moscow, Russia aut NATIONALLICENCE 773 0- Applied Magnetic Resonance Springer Vienna 46/12(2015-12-01), 1409-1420 0937-9347 46:12<1409 2015 46 723