Dipolarity, hydrogen-bond basicity and hydrogen-bond acidity of aqueous poly(ethylene glycol) solutions.
Poly(ethylene glycol) (PEG) in water is known to alter the structure and/or state of water to give a different polarity from that of pure water. We determined using the solvatochromic comparison method the dipolarity/polarizability (pi*), hydrogen bond (HB) accepting basicity (beta) and HB donating acidity (alpha) of aqueous solutions of PEGs of variegated molecular weights at different concentrations in order to understand the influence of the polymer on these properties of water. It was observed that PEG decreases alpha for water while it does not change pi* and beta appreciably in the range of the molecular weight and compositions studied.
Kim
In-Whan
IW
Department of Chemistry Education, Taegu University, Kyongsan 712-714, Korea.
Jang
Myung Duk
MD
Ryu
Young Kyun
YK
Cho
Eun Hee
EH
Lee
Young Kyu
YK
Park
Jung Hag
JH
D006860:Hydrogen Bonding; D008970:Molecular Weight; D011092:Polyethylene Glycols / Q000737:chemistry*; D012996:Solutions / Q000737:chemistry; D055672:Static Electricity; D014867:Water / Q000737:chemistry*
D012996:Solutions; D014867:Water; D011092:Polyethylene Glycols