V2EX unimolecular

Unimolecular

释义 Definition

(化学)单分子的;涉及单个分子作为基本反应单位的。常见于“unimolecular reaction(单分子反应)”,指反应速率主要取决于某一种分子的变化(如异构化、分解等),表观动力学常呈一级反应特征。

发音 Pronunciation

/junmlkjlr/

例句 Examples

A unimolecular reaction can proceed when one molecule rearranges its bonds.
单分子反应可以在一个分子内部键发生重排时进行。

Although the mechanism is unimolecular, the observed rate may depend on temperature and pressure because activation occurs through molecular collisions.
尽管机理是单分子的,但由于分子碰撞提供活化能,观测到的速率可能仍会受温度和压力影响。

词源 Etymology

由 **uni-**(“一、单一”,源自拉丁语 unus)+ molecular(“分子的”,来自 molecule,与拉丁语 moles“团块、质量”有关)构成,字面意思是“单个分子的”。

相关词 Related Words

文学与典籍 Literary Works

  • Atkins’ Physical Chemistry(阿特金斯《物理化学》):在化学动力学章节讨论一级过程与单分子反应模型时常出现该词。
  • Chemical Kinetics and Reaction Dynamics(Steinfeld, Francisco, Hase):涉及RRKM理论与单分子分解反应时频繁使用“unimolecular”。
  • IUPAC *Compendium of Chemical Terminology (the Gold Book)*(IUPAC《化学术语汇编金皮书》):在动力学相关术语条目中出现并用于规范表述。
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