Scale-Dependent Photosalience and Topotactic Reaction of Microcrystalline Benzylidenebutyrolactone Determined by Electron Microscopy and Electron Diffraction
Scale-Dependent Photosalience and Topotactic Reaction of Microcrystalline Benzylidenebutyrolactone Determined by Electron Microscopy and Electron Diffraction
复制标题
电子显微镜和电子衍射测定微晶亚苄基丁内酯的尺度依赖性光致性和拓扑反应
DOI：
10.1021/acs.cgd.1c01378
复制
发表时间：
2022
影响因子：
3.8
通讯作者：
Garcia-Garibay, Miguel A.
中科院分区：
文献类型：
--
作者：
Hipwell, Vince M.;Zee, Chih-Te;Rodriguez, Jose;Garcia-Garibay, Miguel A.
由固态光化学反应引起的晶体宏观运动，也称为光致效应，对于微机械致动器和晶体分子机器的发展具有重要意义。利用微晶电子衍射，我们报道了亚苄基丁内酯的最小晶体尺寸阈值的证据，低于该阈值则没有观察到光致变异性。我们通过解决微米级样品在其拓扑定向单晶到单晶反应前后的晶体结构以及通过收集显示尺寸小于约10μm的晶体没有光突起效应的透射电子显微镜图像来证实我们的观察结果。这些结果表明，光致效应不仅取决于晶体支持光化学反应的能力，还取决于一个尺寸阈值，在该阈值下，积累的产物相可以形成一个与反应物的相分离的层，从而它们不同的堆积尺寸能够将在分子水平边界积累的集体应变转化为推动整个晶体样品的宏观运动。
The macroscopic motion of crystals induced by a solid-state photochemical reaction, also known as photosalience, is of interest for the development of micromechanical actuators and crystalline molecular machines. Using microcrystal electron diffraction, we report evidence for a minimum crystal size threshold below which photosalience is not observed for benzylidenebutyrolactone. We confirm our observations by solving the crystal structure of micron-scale specimens before and after their topotactic single crystal-to-single crystal reaction and by collecting transmission electron microscopy images that reveal the absence of photosalient effects for crystals that are below ca. 10 μm in size. These results indicate that photosalience depends not only on the ability of crystals to support a photochemical reaction but also on a size threshold where the accumulated product phase can form a layer that is separate from that of the reactant, such that their different packing dimensions are able to transduce the collective strain accumulated at the molecular-level boundaries into the macroscopic motion that propels the entire crystal specimen.
影响因子：
6.8
作者：
Rodriguez JA;Eisenberg DS;Gonen T
通讯作者：
Gonen T
影响因子：
--
作者：
Lingyang Zhu;R. Al‐Kaysi;C. Bardeen
通讯作者：
Lingyang Zhu;R. Al‐Kaysi;C. Bardeen
借助拓扑化学和相关考虑因素测定有机晶体结构：α-亚苄基-γ-丁内酯和 2-亚苄基环戊酮的分子和晶体结构与其固态光反应性的相关性
DOI：
10.1098/rspa.1985.0009
发表时间：
1985
期刊：
Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences
影响因子：
--
作者：
S. Kearsley;G. Desiraju
通讯作者：
G. Desiraju