2023-07-19 ヒューストン大学(UH)
◆この新しい技術により、原子力発電の安全な廃棄物管理が可能になり、クリーンエネルギーの将来への移行がより持続可能になる可能性があります。さらに、これらの結晶は再利用可能で、廃棄物の削減にも寄与します。研究チームは、今後の実用化に向けて結晶構造の動力学と振る舞いをさらに研究していく予定です。
＜関連情報＞
- https://uh.edu/news-events/stories/2023/july-2023/07192023-molecular-crystals-solution-nuclear-waste.php
- https://www.cell.com/cell-reports-physical-science/fulltext/S2666-3864(23)00293-X
溶液中および界面において高いヨウ素捕捉能を有するシクロベンジルヒドラゾン類 Cyclobenzil hydrazones with high iodine capture capacities in solutions and on interfaces
Alexandra Robles,Maymounah Alrayyani,Xiqu Wang,Ognjen Š. Miljanić
Cell Reports Physical Science Published:July 18, 2023
DOI:https://doi.org/10.1016/j.xcrp.2023.101509
Highlights
•Five cyclotetrabenzil octahydrazones are prepared in high yield
•Their crystal packing is mediated by hydrogen bonding and aromatic stacking
•Pyridine-based system shows very high iodine uptake for a non-polymeric material
Summary
Porous molecular crystals (PMCs) are solution-processable materials with promising applications in thin films and devices. However, some PMCs are only virtually porous, as their pores collapse when desolvated. We demonstrate the productive use of virtual porosity when non-volatile I2 guest acts as the probe. We prepared a series of cyclotetrabenzil hydrazones with progressively larger cavities. Their measured surface areas of up to 131 m2 g−1 are negligible compared with the values predicted from crystal structures. Nevertheless, they effectively capture I2 from aqueous and organic media and at the organic-aqueous interface, with capture capacities scaling with virtual void volumes. The pyridine-functionalized system is a notable outlier, engaging up to 21 I2 molecules and showing capture capacity of 4.15 g g−1, unprecedented among non-polymeric materials. These findings could impact the management of radioactive I2 and help in ensuring the integrity of protective coatings of nuclear reactors and waste containment vessels.
