Li Zi-Jian, Yue Zenghui, Ju Yu, Wu Xiaoling, Ren Yiming, Wang Shaofei, Li Yongxin, Zhang Zhi-Hui, Guo Xiaofeng, Lin Jian, Wang Jian-Qiang
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 2019 Jia Luo Road, Shanghai 201800, China.
Key Laboratory of Interfacial Physics and Technology, Chinese Academy of Sciences, 2019 Jia Luo Road, Shanghai, 201800, China.
Inorg Chem. 2020 Apr 6;59(7):4435-4442. doi: 10.1021/acs.inorgchem.9b03602. Epub 2020 Mar 13.
Two novel thorium-based metal-organic frameworks (MOFs), namely and , have been synthesized via the solvothermal reactions of thorium nitrate and 1,4- or 2,6-naphthalenedicarboxylic acid in the presence of acid modulators. Bearing the rigid aromatic architectures, and exhibit exceptional chemical (from pH 1 to 12) and thermal stabilities (up to 520 °C), as well as ionizing radioresistance (2 × 10 Gy β and γ irradiations). The highly porous nature and conjugated π-electrons of naphthalene on the organic linkers endow high affinity of both MOFs toward I molecules owning to the charge transfer between π-electrons of the host networks and the guest iodine molecules, as evidenced by combined techniques including of FTIR, PXRD, SEM-EDS, UV-vis spectroscopy, XPS, and Raman spectroscopy. Particularly, can efficiently remove >99% I from cyclohexane solution and exhibit guest uptake of iodine vapor with an adsorption capacity of 473 mg/g.
通过硝酸钍与1,4 - 或2,6 - 萘二甲酸在酸调节剂存在下的溶剂热反应，合成了两种新型的钍基金属有机框架材料（MOF），即 和 。由于具有刚性芳香结构， 和 表现出优异的化学稳定性（pH值范围为1至12）和热稳定性（高达520°C），以及抗电离辐射性（2×10 Gy的β和γ辐射）。有机连接体上萘的高度多孔性质和共轭π电子赋予了这两种MOF对碘分子的高亲和力，这是由于主体网络的π电子与客体碘分子之间的电荷转移，包括傅里叶变换红外光谱（FTIR）、粉末X射线衍射（PXRD）、扫描电子显微镜 - 能谱分析（SEM - EDS）、紫外 - 可见光谱、X射线光电子能谱（XPS）和拉曼光谱等综合技术证明了这一点。特别地， 能够从环己烷溶液中高效去除>99%的碘，并且对碘蒸气的客体吸附容量为473 mg/g。
