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A new flexible cationic Zn(II)metal organic framework, {[Zn2(BDC)1.5(L)(DMF)]NO3·DMF·solvent}n, MOF 1, which is a corrugated two‐dimensional network, was synthesized by self‐assembly of Zn(NO3)2.6H2O with 4,4′‐methylenebis(N‐(pyridin‐2‐ylmethylene)aniline as a neutral ligand and terephthalic acid in dimethyl formamide (DMF) as solvent and characterized by X‐ray diffraction. Because of the presence of uncoordinated nitrate (NO3−) ions in the channels, the compound was employed for ion‐exchange applications. We report a detailed study of the host–guest interaction for a cationic metal–organic framework (MOF) that can reversibly capture nitrate. The recrystallization of the MOF was evaluated by monitoring the anion exchange dynamics using a combination of powder X‐ray diffraction and Fourier transform infrared spectra with various kinds of foreign anions. This MOF showed fast and highly efficient Cr2O72− and CrO42−, N3−, MnO4−, and SCN− exchange. The trapping capacities of Cr2O72−, CrO42−, N3−, MnO4−, and SCN− were 105,138, 44,104, and 25mg/g at 25°C after 3h, respectively, and there was good recyclability for capturing N3− and SCN−. {[Zn2(BDC)1.5(L)(DMF)]NO3}n exhibited anion exchange selectivity of SCN− in a solution containing a mixture of 0.025mmol N3−, SCN−, CrO4−2−, Cr2O72−, and MnO4− for 3h and exhibited anion exchange selectivity for SCN− and Cr2O72− in a solution containing a mixture of 0.001mmol N3−, SCN−, CrO42−, Cr2O72−, and MnO4−. [ABSTRACT FROM AUTHOR]

A letter to the editor is presented in response to the article "Neuropsychiatric Consequences of Deep Brain Stimulation in Patients with Chronic Movement Disorder" by Seyed Kazem Malakouti, Seyed Reza Mahdavi, and colleagues that was published in the previous issue.