290K下0.1～600MPa水的Raman光谱原位研究  

Raman Scattering Study of Water up to 600 MPa at 290 K

作　　者：孙樯[1] 郑海飞[1] 谢鸿森[2] 徐济安 Hines E 

机构地区：[1]北京大学地球与空间科学学院,北京100871 [2]中国科学院地球化学研究所,贵州贵阳550002 [3]Carnegie Institute of Washington [4]Charles and Colvard

出　　处：《光谱学与光谱分析》2004年第8期963-965,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金 (批准号:40 1 0 30 0 5和 1 0 0 32 0 4 0 )资助项目

摘　　要：在 2 90K和 0 0 1～ 6 0 0MPa条件下 ,就压力对液态水对称伸缩振动的影响进行了原位Raman散射光谱研究。表明 :( 1)在 0 1～ 2 0 0MPa范围内 ,(ν1) max随着压力升高而减小 ;( 2 )在 2 0 0～ 4 0 0MPa范围内 ,压力升高导致 (ν1) max增大 ,并在 4 0 0MPa时达到最大值 ;( 3) (ν1) max随着压力的进一步升高 ( >4 0 0MPa)而降低。这表明在 2 0 0和 4 0 0MPa时 ,液态水结构的变化是不连续的 ,这也与在该压力范围内rOO 的变化特征是一致的。可认为与冰Ⅰh→冰Ⅲ→冰Ⅴ的相变相类似 。Raman scattering studies of the stretching band from liquid water have been conducted up to 600 MPa at 290 K. It is shown that (nu(1))(max) decreases with increasing pressure initially and reaches the minimum at about 200 MPa, and increases at higher pressure up to about 400 MPa, then decreases with increasing pressure up to 600 MPa. And this is also in accordance with the behavior of r(infinity) under pressure. The authors conclude that, just like ice phase transition ice (I h)-->ice(III)-->ice(V) there also probably exists water phase transition water (I h)-->water(III)-->water(V).

关 键 词：液态水 压力 对称伸缩振动 原位Raman散射光谱 相变 氢键 

分 类 号：O645.1[理学—物理化学] O657.37[理学—化学]