Abstract
The adsorptions of gaseous $H_2O\;and\;D_2O\;on\;Na^+-,\;Ca^{2+}-,\;and\;Al^{3+}$ montmorillonites at various temperatures were undertaken. Break down of ir hydroxyl stretching bands into four Gaussian components was made by means of manual technique. Resonance theory of water to form silanol hydroxyl group was supported by $3625cm^{-1}$ band for OH and $2680cm^{-1}$ band for OD which depend on amounts of water adsorbed. The broad bands at about $3400 cm^{-1}\;and\;2475cm^{-1}$ were assigned to stretching band of silanol OH hydrogen bonded to adsorbed water. The prominent $3230 cm^{-1}$ band together with component around $2345 cm^{-1}$ were attributed to adsorbed $H_2O\;and\;D_2O$ respectively. The chemical nature of the hydrogen bonding between adsorbed water and neighboring surface OH was explained adequately in terms of electrostatic interaction.
$Na^+,\;Ca^{2+},\;Ni^{2+},\;Al^{3+}$ 이온이 포화된 montmorillonite상에 여러 溫度에서 일어난 $H_2O와\;D_2O$의 氣相吸着에 관하여 연구하였다. 吸着으로 인하여 생긴 OH의 IR 신축진동 band를 computer에 의하지 않고 4개의 Gauss 成分으로 나누었다. 물과 silanol OH기와의 共鳴理論은 $3625cm^{-1}와\;2680cm^{-1}$로 증명되었다. $3400cm^{-1}$와 2475cm 에서의 broad한 吸收는 吸着된 물과 水素結合을 일으키고 있는 silanol OH의 신축진동에 의한 것이었고 $3650cm^{-1}와\;2345cm^{-1}$ band는 吸着된 $H_2O와\;D_2O$에 의한 것이었다. 吸着水와 表面 OH사이의 水素結合은 精電氣的 相互作用에 의한 것임이 밝혀졌다.
