Lu, Tian-Qi; Wang, Xue-Tao; Cheng, Lan-Tao; Chen, Cheng; Shi, Haiyan; Zheng, Jun; Zheng, Xiu-Ying published an article in 2021. The article was titled 《Soft Metal-Organic Frameworks Based on {Na@Ln6} as a Secondary Building Unit Featuring a Magnetocaloric Effect and Fluorescent Sensing for Cyclohexane and Fe3+》, and you may find the article in Crystal Growth & Design.COA of Formula: C7H9NO2 The information in the text is summarized as follows:
Two series of cluster-based Ln-metal-organic frameworks (MOFs) {[Na@Ln8(EDTA)6(H2O)22]·ClO4·xH2O}n (x ≈ 28, Ln = Gd 1, Ln = Eu 2) and {[Na@Ln9(EDTA)6(H2O)27]·(ClO4)4·xH2O}n (x ≈ 26, Ln = Gd 3, Ln = Eu 4) were prepared by ethylene diamine tetraacetic acid (H4EDTA) to control the hydrolysis of lanthanide ions to form cluster-based secondary building blocks and hydrated metal ions as linkers. Structural anal. showed that all four compounds were formed by using {Na@Ln6} as the node and hydrated [Ln(H2O)5]3+ ion as the linker. Compounds 1-2 and 3-4 featured a two-dimensional (2D) layered structure and a three-dimensional (3D) frame structure, resp. Magnetic studies showed that compounds 1 and 3 displayed a considerable magnetocaloric effect with magnetic entropy values of 32.8 and 33.3 J kg-1 K-1, resp., at low temperature and high field. The magnetic entropy changes of 3 did not increase greatly with the increase of the dimension due to the similar weak magnetic interactions and similar magnetic densities of compounds 1 and 3. Luminescence studies showed that compounds 2 and 4 had a good recognition effect on the cyclohexane mol., and 4 displayed excellent sensitive sensing and a detection effect on Fe3+ ions in MeOH based on the high-sensitivity fluorescence quenching phenomenon. In the experiment, the researchers used many compounds, for example, 2,6-Pyridinedimethanol(cas: 1195-59-1COA of Formula: C7H9NO2)
2,6-Pyridinedimethanol(cas: 1195-59-1) belongs to pyridine. Pyridine is a relatively complex molecule and exhibits a number of different bands in IR spectra. Among others, the bands characterizing the ν8a and ν19b modes have been found to be sensitive to the coordination or protonation of the molecule. Note that the band that is diagnostic for the PyH+ ion at about 1545 cm− 1 (ν19b mode) does not overlap with any of the other bands.COA of Formula: C7H9NO2
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