Accurate Determination of the Quantity and Spatial Distribution of Counterions around a Spherical Macroion

February 16, 2021

Angew. Chem. Int. Ed., 2021, 60, 11, 5833-5837

DOI: 10.1002/anie.202013806

Critical coagulation concentration (CCC) is the minimum salt concentration required to trigger coagulation of macro-ions in a solution. Mo-132, the macro-ion with -42 charges, exhibit anomalous lower CCC value for monovalent counter-cations in comparison to divalent cations. Researchers from Akron University and University of Chicago have recently measured the distribution of monovalent (Rb⁺) and divalent (Sr²⁺) cations surrounding Mo-132 clusters using Anomalous Small Angle X-ray Scattering (ASAXS). The radial distribution of the ions surrounding the Mo-132 clusters obtained from ASAXS analysis reveals stronger affinity of the monovalent ions (Rb⁺) in comparison to the divalent ions (Sr²⁺).

https://onlinelibrary.wiley.com/doi/full/10.1002/anie.202013806

Jiahui Chen¹, Mrinal K Bera^2,*, Hui Li¹, Yuqing Yang¹, Xinyu Sun¹, Jiancheng Luo¹, Jessi Baughman¹, Cheng Liu¹, Xuesi Yao¹, Steven SC Chuang¹ and Tianbo Liu^1,*

¹ School of Polymer Science and Polymer Engineering, The University of Akron, Akron, OH 44325, USA

² NSF’s ChemMatCARS, Center for Advanced Radiation Sources, The University of Chicago, Chicago, IL 60637, USA