SPECTROSCOPIC EVIDENCE FOR SPATIAL CORRELATIONS OF HYDROGEN-BONDS IN LIQUID WATER
SPECTROSCOPIC EVIDENCE FOR SPATIAL CORRELATIONS OF HYDROGEN-BONDS IN LIQUID WATER
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DOI：
10.1021/j100408a027
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发表时间：
1986-08-14
影响因子：
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通讯作者：
SCEATS, MG
中科院分区：
文献类型：
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作者：
GREEN, JL;LACEY, AR;SCEATS, MG
结论利用内腔光声光谱技术和标准红外光谱技术研究了3，3，3-三氟丙炔的CH和C= C泛音光谱。发现该分子的CH振动有三种类型的振动跃迁：（a）主泛频跃迁（0-* yy，），（B）热带（y 7-*（y 7 + yy，）），（y 7，±y，0）和（yy，± y 7）型的组合带，从y= 1到y= 6的所有跃迁中观察到的热带跃迁y 7-（y 7 + yy，）表明CH伸缩模（y，）和CH弯曲模（y 7）之间存在强相互作用.对于其他具有单炔键CH伸缩振动的分子如N= CH和（CF_3）_3CC= CH，也发现了同样的振动运动间的相互作用，这种强耦合本质上是非共振的。组合带如u、y、± y 10或、、± y 7在
Conclusions The spectrum of CH and C= C overtones of 3, 3, 3-trifluoro-propyne has been investigated with intracavity photoacoustic spectroscopy and standard infrared techniques. Three types of vibrational transitions are identified for CH absorptions of this molecule:(a) the main overtone transition (0-* yy,),(b) the hot band (y7—*(y7+ yy,)), and (c) combination bands of the type (yy,±y, 0) and (yy,±y7).The hot-band absorptions y7—(y7+ yy,) observed for all the transitions from y= 1 to y= 6 show stronginteraction between the CH stretching mode (y,) and the CH bending mode (y7). The same interaction between vibrational motions is also identified for othermolecules with single acetylenic CH stretching vibrations such as N= CH and (CF3) 3CC= CH. Thisstrong coupling is nonresonant in nature. Combination bands such as u, y,±y10 or,,±y7 are close in