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Bond Dissociation Triggering Molecular Disorder in Amorphous H2O
The Journal of Physical Chemistry A ( IF 2.7 ) Pub Date : 2018-11-15 00:00:00 , DOI: 10.1021/acs.jpca.8b08455
Masaki Hada 1 , Yuho Shigeeda 1 , Shin-ya Koshihara 2 , Takeshi Nishikawa 1 , Yoshifumi Yamashita 1 , Yasuhiko Hayashi 1
Affiliation  

We developed a system to deposit H2O molecules onto ultrathin silicon nitride substrates in situ using time-resolved transmission electron diffraction apparatus and performed ultrafast time-resolved electron diffraction measurements in the noncrystalline (amorphous) H2O under near-ultraviolet photoexcitation. The observed dynamics directly represent O–H bond dissociation via multiphoton absorption and charge transfer, which trigger ionization and intermolecular disorder in the amorphous H2O. Our results illustrate the intriguing nature of light–matter and matter–matter interactions in H2O molecules.

中文翻译:

非晶H 2 O中的键解离引发分子混乱

我们开发了一种使用时间分辨透射电子衍射仪将H 2 O分子原位沉积到超薄氮化硅衬底上的系统,并在近紫外光激发下在非晶态(非晶态)H 2 O中进行了超快时间分辨电子衍射测量。观察到的动力学直接表示通过多光子吸收和电荷转移导致的O–H键解离,这会触发无定形H 2 O中的电离和分子间无序。我们的结果说明了H 2 O分子中光-物质和物质-物质相互作用的有趣性质。。
更新日期:2018-11-15
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