The
interfacial assembly process and configuration of the pseudogemini
surfactant fabricated by sodium dodecyl benzene sulfonate (SDBS) and
4,4′-oxydianilinium chloride (ODC) were studied using quantum
mechanical calculations and molecular dynamics (MD) simulations. The
MD simulation results revealed that SDBS and ODC showed the vertical
and horizontal arrangements at the oil/water interface, respectively,
and the interfacial assembled configuration presented an unexpected
“H” shape rather than the traditional “U”
shape. The radial distribution functions between the head groups and
water molecules were employed to explore the effects of the surrounding
water molecules on the SDBS/ODC interaction. Furthermore, the results
of the nonbonded interaction calculations and the reduced density
gradient method directly confirmed that the cation−π
interaction should be responsible for the SDBS/ODC assembly mechanism
and the final configuration at the oil/water interface.
Population and water withdrawal data sets are currently faced with difficulties in collecting, processing and verifying multi-source time series, and the spatial distribution characteristics of long series are also relatively lacking. Time series is the basic guarantee for the accuracy of data sets, and the production of long series spatial distribution is a realistic requirement to expand the application scope of data sets. Through the time-consuming and laborious basic processing work, this research focuses on the population and water intake time series, and interpolates and extends them to specific land uses to ensure the accuracy of the time series and the demand of spatially distributed data sets. This research provides a set of population density and water intensity products from 1960 to 2020 distributed to the administrative units or the corresponding regions. The data set fills the gaps in the multi-year data set for the accuracy of population density and the intensity of water withdrawal.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.