Matches in SemOpenAlex for { <https://semopenalex.org/work/W2913740983> ?p ?o ?g. }
- W2913740983 endingPage "5803" @default.
- W2913740983 startingPage "5790" @default.
- W2913740983 abstract "Nanoporous silica materials are important in catalysis, energy, and materials applications in which water is an essential component. System performance is intimately connected to the water dynamics occurring in the confined environment. However, the dynamics and associated structures of water in nanoporous silica have proven challenging to measure and predict. Here, confined water dynamics are examined via the ultrafast infrared spectroscopy of selenocyanate (SeCN–) dissolved in the hydrated ∼2.4 nm silica mesopores of MCM41. Polarization selective pump–probe and two-dimensional infrared measurements on the CN stretching mode of SeCN– are used to probe the effect of confinement on orientational relaxation and spectral diffusion dynamics. The dynamics of SeCN– provide information on the surrounding water hydrogen bond dynamics. The long CN stretch lifetime (∼36 ps), relative to the water hydroxyl stretch (<2 ps), significantly extends the time scales that can be accessed. Complete orientational relaxation (C2(t), orientational correlation function) and spectral diffusion (Cω(t), frequency–frequency correlation function) dynamics are presented and compared to the simulated time correlation functions in a model silica pore of the same size. A slow decay component not present in the bulk liquid is observed in both experiments, indicating that the hydrogen bond dynamics are significantly altered by confinement. The simulations reveal a qualitative difference in the functional dependence of C2(t;d) and Cω(t;d) on d, the distance from the interface. The former becomes exponentially faster with distance while the latter makes an abrupt transition from slower to faster dynamics midway between the surface and pore center, d ≅ 6 Å." @default.
- W2913740983 created "2019-02-21" @default.
- W2913740983 creator A5029192239 @default.
- W2913740983 creator A5048693829 @default.
- W2913740983 creator A5050040176 @default.
- W2913740983 creator A5078149381 @default.
- W2913740983 date "2019-01-30" @default.
- W2913740983 modified "2023-09-27" @default.
- W2913740983 title "Water Dynamics in Nanoporous Silica: Ultrafast Vibrational Spectroscopy and Molecular Dynamics Simulations" @default.
- W2913740983 cites W1912811808 @default.
- W2913740983 cites W1964121487 @default.
- W2913740983 cites W1969786581 @default.
- W2913740983 cites W1974306386 @default.
- W2913740983 cites W1975762035 @default.
- W2913740983 cites W1982219464 @default.
- W2913740983 cites W1985023527 @default.
- W2913740983 cites W1990989967 @default.
- W2913740983 cites W1991394389 @default.
- W2913740983 cites W1991794210 @default.
- W2913740983 cites W1993935900 @default.
- W2913740983 cites W1994962674 @default.
- W2913740983 cites W1998643104 @default.
- W2913740983 cites W2011254969 @default.
- W2913740983 cites W2011895878 @default.
- W2913740983 cites W2017798184 @default.
- W2913740983 cites W2018305531 @default.
- W2913740983 cites W2021076630 @default.
- W2913740983 cites W2026406194 @default.
- W2913740983 cites W2031435626 @default.
- W2913740983 cites W2031556656 @default.
- W2913740983 cites W2035855010 @default.
- W2913740983 cites W2039843621 @default.
- W2913740983 cites W2040371272 @default.
- W2913740983 cites W2041638382 @default.
- W2913740983 cites W2043354579 @default.
- W2913740983 cites W2043438870 @default.
- W2913740983 cites W2049475242 @default.
- W2913740983 cites W2049653084 @default.
- W2913740983 cites W2049759388 @default.
- W2913740983 cites W2050987365 @default.
- W2913740983 cites W2055060047 @default.
- W2913740983 cites W2056624015 @default.
- W2913740983 cites W2057944173 @default.
- W2913740983 cites W2058873897 @default.
- W2913740983 cites W2061975878 @default.
- W2913740983 cites W2064141166 @default.
- W2913740983 cites W2068644111 @default.
- W2913740983 cites W2068937960 @default.
- W2913740983 cites W2070902150 @default.
- W2913740983 cites W2073421746 @default.
- W2913740983 cites W2075187353 @default.
- W2913740983 cites W2083267463 @default.
- W2913740983 cites W2086079563 @default.
- W2913740983 cites W2089489422 @default.
- W2913740983 cites W2098894422 @default.
- W2913740983 cites W2106140689 @default.
- W2913740983 cites W2120571018 @default.
- W2913740983 cites W2122471294 @default.
- W2913740983 cites W2123453296 @default.
- W2913740983 cites W2134464060 @default.
- W2913740983 cites W2140506809 @default.
- W2913740983 cites W2143412065 @default.
- W2913740983 cites W2162425379 @default.
- W2913740983 cites W2164304015 @default.
- W2913740983 cites W2166530934 @default.
- W2913740983 cites W2167876882 @default.
- W2913740983 cites W2312199777 @default.
- W2913740983 cites W2315096497 @default.
- W2913740983 cites W2317590817 @default.
- W2913740983 cites W2322417240 @default.
- W2913740983 cites W2326307107 @default.
- W2913740983 cites W2398293743 @default.
- W2913740983 cites W2408547592 @default.
- W2913740983 cites W2557072311 @default.
- W2913740983 cites W2604734935 @default.
- W2913740983 cites W2626388906 @default.
- W2913740983 cites W2761688541 @default.
- W2913740983 cites W2766127534 @default.
- W2913740983 cites W331729359 @default.
- W2913740983 cites W4214503184 @default.
- W2913740983 doi "https://doi.org/10.1021/acs.jpcc.9b00593" @default.
- W2913740983 hasPublicationYear "2019" @default.
- W2913740983 type Work @default.
- W2913740983 sameAs 2913740983 @default.
- W2913740983 citedByCount "29" @default.
- W2913740983 countsByYear W29137409832019 @default.
- W2913740983 countsByYear W29137409832020 @default.
- W2913740983 countsByYear W29137409832021 @default.
- W2913740983 countsByYear W29137409832022 @default.
- W2913740983 countsByYear W29137409832023 @default.
- W2913740983 crossrefType "journal-article" @default.
- W2913740983 hasAuthorship W2913740983A5029192239 @default.
- W2913740983 hasAuthorship W2913740983A5048693829 @default.
- W2913740983 hasAuthorship W2913740983A5050040176 @default.
- W2913740983 hasAuthorship W2913740983A5078149381 @default.
- W2913740983 hasConcept C112887158 @default.
- W2913740983 hasConcept C120665830 @default.
- W2913740983 hasConcept C121332964 @default.