Evaluation of bonded layer disorder from thermodynamic behavior of methylaminopropyl groups immobilized on SiO2

Thermodynamic characteristics of reaction between proton and methylaminopro pyl groups that are covalently bonded to silica gel surface were calculated . First evidence of short-distance interaction between neighboring bonded a mines was obtained. Addition of the first proton does not destroy such inte raction. Second proton promotes significant geometry changing.