Abstract
Near-infrared (NIR) absorption measurements over a wavenumber range from 4000 to 12000 cm(-1) were used to investigate hydration behavior of poly(ethylene oxide)s bearing molar masses of 3 × 10(3) (PEO3) and 20 × 10(3) (PEO20) in aqueous solution at a dilute regime. NIR absorption spectra for solutions were perfectly decomposed into three components: bulk water, PEOs, and hydrated water to PEOs. While amounts of each component were proportional to the concentrations of PEOs (cEO), the wavenumber dependence of each spectrum was independent of cEO and also the molar masses of PEOs. A newly determined NIR absorption spectrum of hydrated water molecules to PEOs found in a wavenumber range from 5500 to 7500 cm(-1) was well described with the summation of two Gaussian-type vibration modes possessing the same magnitude, which were observed at different wavenumbers of 6480 and 6910 cm(-1), respectively. Each mode was assigned to O-H stretching first overtone of water molecules hydrated directly to ether oxygen atoms (6480 cm(-1)) and water oxygen atoms (6910 cm(-1)) belonging to the secondary hydration layer.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
