Evaporation of Dimers from Proton-Bound Formic Acid Clusters
Evaporation of Dimers from Proton-Bound Formic Acid Clusters
复制标题
从质子结合的甲酸簇中蒸发二聚体
DOI：
10.1021/j100075a006
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
C. Lifshitz
中科院分区：
文献类型：
--
作者：
W. Feng;C. Lifshitz
甲酸的质子结合簇和甲酸与水的混合簇蒸发甲酸的中性二聚体。该属性与液体甲酸共享。团簇被认为是气相和凝聚相之间的差距的桥梁。对于六聚体，二聚体的蒸发已经开始。碰撞活化解离表明中心离子（例如HaO "1"）被氢键甲酸环完全溶剂化的结构。环闭合和二聚体蒸发开始相同的集群大小。热化学的考虑表明，甲酸二聚体是在开链构型，而不是在闭环的蒸发。
Proton-bound clusters of formic acid and mixed clusters of formic acid and water evaporate neutral dimers of formic acid. This attribute is shared with liquid formic acid. Clusters are considered to bridge the gap between the gas phase and condensed phases. The evaporation of dimers begins already for hexamers. Collisionally activated dissociations indicate a structure in which a central ion (eg HaO" 1") is completely solvated by a ring of hydrogen-bonded formic acids. Ring closure and dimer evaporation begin for the same cluster sizes. Thermochemical considerations suggest that the formic acid dimer is evaporated in the open-chain configuration, rather than in the ring-closed one.