衍射X射线闪烁揭示了1,2,3,5-四溴苯中特征性晶体多晶型动力学。

Diffracted X-ray blinking reveals signature crystal polymorph dynamics in 1,2,3,5-Tetrabromobenzene.

作者信息

McGehee Keegan, Saito Koichiro, Fukaya Ryo, Haruki Rie, Nozawa Shunsuke, Gao Minghao, Sasaki Yuji C, Mio Kazuhiro, Norikane Yasuo

机构信息

National Institute of Advanced Industrial Science and Technology (AIST), 6-2-3 Kashiwanoha, Kashiwa, 277- 0882, Chiba, Japan.

Research Institute for Advanced Electronics and Photonics, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, 305-8565, Ibaraki, Japan.

出版信息

Sci Rep. 2025 Mar 24;15(1):10166. doi: 10.1038/s41598-025-95316-z.

DOI:10.1038/s41598-025-95316-z

PMID:40128587

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11933264/

Abstract

In this work we report findings on the study of 1,2,4,5-tetrabromobenzene (TBB) polymorphs by diffracted X-ray blinking (DXB). Using DXB it was found that on the ms-s time scale subtle fluctuations in the d-spacing between lattice planes occurs more rapidly in the γ-phase polymorph than in the β-phase, successfully identifying another distinct characterization between them. It was also found that the rate of molecular motion spiked near the phase transition temperature beyond the typical characteristic regions. This offers additional insight on previous reports of anisotropic lattice softening and strain accumulation near the phase transition temperature that are key to the mechanically responsive properties of TBB crystals. The present study on ms-s crystalline dynamics by DXB for mechanically responsive organic crystals also serves as a guideline for future study of more complicated mechanically responsive crystal behaviors.

摘要

在这项工作中，我们报告了通过X射线衍射闪烁（DXB）对1,2,4,5-四溴苯（TBB）多晶型物的研究结果。使用DXB发现，在毫秒至秒的时间尺度上，晶格平面之间d间距的细微波动在γ相多晶型物中比在β相中发生得更快，成功地识别出它们之间的另一个明显特征。还发现分子运动速率在相变温度附近超出典型特征区域时出现峰值。这为先前关于相变温度附近各向异性晶格软化和应变积累的报道提供了更多见解，这些是TBB晶体机械响应特性的关键。本研究通过DXB对机械响应有机晶体进行的毫秒至秒级晶体动力学研究，也为未来研究更复杂的机械响应晶体行为提供了指导。