Crystal structure, assembly process, and single-molecule magnet behavior of a triangular prismatic {Co₉} cluster

Abstract

Using the polydentate ligand of H4btdpa with the CoII ion, a triangular prism-type nine-nucleus cluster [Co9(btdpa)3(CH2OCH2OH)6]·3.5H2O ({Co9}-Eg, H4btdpa = 6,6'-(1H,1'H-[3,3'-bi(1,2,4-triazole)]-5,5'-diyl)dipicolinic acid) was constructed. Ion fragmentation during the formation of {Co9}-Eg...

Two Octa-Nuclear {Ln8} (Ln = Tb, Dy) Complexes with “4 + 4” Covalent Organic Macrocycles: Structure, Solution Behavior, Luminescence, and Magnetic Properties

“…Isometric fractions were extracted from the reaction mixture of Tb 8 L 4+4 at specific time intervals and diluted with chromatographic purity methanol for analysis using ESI-MS. In addition, MS data in the range of m / z = 300–3500 was collected in the positive ion mode for testing . At the beginning of the reaction for 5 min (as shown in Figure a and Table ), mass spectrometry exhibited a series of univalent ion peaks ( m / z = 309.19, 437.22, 593.12, 611.11, 809.05, 911.10, 1185.23, 1248.23, and 1341.13).…”

“…In addition, MS data in the range of m/z = 300−3500 was collected in the positive ion mode for testing. 29 At the beginning of the reaction for 5 min (as shown in Figure 2a and Table 2), mass spectrometry exhibited a series of univalent ion peaks (m/z = 309. 19, 437.22, 593.12, 611.11, 809.05, 911.10, 1185.23, 1248.23, and 1341.13).…”

Stepwise formation of a chemodynamic therapy agent of {Cu8} macrocyclic complex recognized by iodide ions

“…20 ESI-MS has been used to track the formation of polyoxometalate and metal clusters in solution. 21–23 Cronin et al used mass spectrometry to observe the formation of hybrid polyoxometalates in real-time and supramolecular transformations from {Co II 13 } to {Co II 12 } nanoclusters. 24,25 Our group observed the formation of the {Fe 5 } cluster using time-dependent high resolution ESI-MS. 26 However, the usage of ESI-MS to track the stepwise formation process of MOMs and explore the template effect is rarely reported.…”