Complexation of polyacrylates by Ca2+ ions. Time-resolved studies using attenuated total reflectance Fourier transform infrared dialysis spectroscopy.
The attenuated total reflectance Fourier transform infrared dialysis technique is introduced for the time-resolved investigation of the binding processes of Ca2+ to polyacrylates dissolved in water. We observed transient formation of intermediates in water with various types of coordination of the carboxylate group to Ca2+ throughout the complexation steps. Time-resolved changes in the spectra were analyzed with principal component analysis, from which the spectral species were obtained as well as their formation kinetics. We propose a model for the mechanisms of Ca2+ coordination to polyacrylates. The polymer chain length plays an important role in Ca2+ binding.
Fantinel
Fabiana
F
Rieger
Jens
J
Molnar
Ferenc
F
Hübler
Patrick
P
D000179:Acrylates / Q000138:chemical synthesis / Q000737:chemistry*; D002118:Calcium / Q000737:chemistry*; D003956:Dialysis / Q000295:instrumentation; D009942:Organometallic Compounds / Q000138:chemical synthesis*; D010084:Oxidation-Reduction; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared / Q000295:instrumentation / Q000379:methods; D013997:Time Factors; D014867:Water / Q000737:chemistry
D000179:Acrylates; D009942:Organometallic Compounds; D011108:Polymers; D014867:Water; D002118:Calcium