ic9b03602_si_001.pdf (822.78 kB)
Ultrastable Thorium Metal–Organic Frameworks for Efficient Iodine Adsorption
journal contribution
posted on 2020-03-13, 18:43 authored by Zi-Jian Li, Zenghui Yue, Yu Ju, Xiaoling Wu, Yiming Ren, Shaofei Wang, Yongxin Li, Zhi-Hui Zhang, Xiaofeng Guo, Jian Lin, Jian-Qiang WangTwo
novel thorium-based metal–organic frameworks (MOFs), namely Th-SINAP-7 and Th-SINAP-8, 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, Th-SINAP-7 and Th-SINAP-8 exhibit exceptional chemical (from pH 1 to 12) and thermal stabilities
(up to 520 °C), as well as ionizing radioresistance (2 ×
105 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 I2 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, Th-SINAP-8 can efficiently remove >99% I2 from cyclohexane solution
and exhibit guest uptake of iodine vapor with an adsorption capacity
of 473 mg/g.