《Unusual Recognition and Separation of Hydrated Metal Sulfates [M2(μ-SO4)2(H2O)n, M = ZnII, CdII, CoII, MnII] by a Ditopic Receptor》 was written by Ghosh, Tamal Kanti; Dutta, Ranjan; Ghosh, Pradyut. SDS of cas: 31106-82-8This research focused onzinc cadmium cobalt manganese pyridinylmethylaminoethylbutylurea sulfate complex preparation; binding constant transition metal pyridinylmethylaminoethylbutylurea sulfate; crystal structure transition metal pyridinylmethylaminoethylbutylurea sulfate. The article conveys some information:
A ditopic receptor L1, having metal binding bis(2-picolyl) donor and anion binding urea group, is synthesized and explored toward metal sulfate recognition via formation of dinuclear assembly, (L1)2M2(SO4)2. Mass spectrometric anal., 1H-DOSY NMR, and crystal structure anal. reveal the existence of a dinuclear assembly of MSO4 with two units of L1. 1H NMR study reveals significant downfield chem. shift of -NH protons of urea moiety of L1 selectively with metal sulfates (e.g., ZnSO4, CdSO4) due to second-sphere interactions of sulfate with the urea moiety. Variable-temperature 1H NMR studies suggest the presence of intramol. hydrogen bonding interaction toward metal sulfate recognition in solution state, whereas intermol. H-bonding interactions are observed in solid state. In contrast, anions in their tetrabutylammonium salts fail to interact with the urea -NH probably due to poor acidity of the tert-Bu urea group of L1. Metal sulfate binding selectivity in solution is further supported by isothermal titration calorimetric studies of L1 with different Zn salts in DMSO, where a binding affinity is observed for ZnSO4 (Ka = 1.23 × 106), which is 30- to 50-fold higher than other Zn salts having other counteranions in DMSO. Sulfate salts of CdII/CoII also exhibit binding constants in the order of ∼1 × 106 as in the case of ZnSO4. Pos. role of the urea unit in the selectivity is confirmed by studying a model ligand L2, which is devoid of anion recognition urea unit. Structural characterization of four MSO4 [M = ZnII, CdII, CoII, MnII] complexes of L1, i.e., complex 1, [(L1)2(Zn)2(μ-SO4)2]; complex 2, [(L1)2(H2O)2(Cd)2(μ-SO4)2]; complex 3, [(L1)2(H2O)2(Co)2(μ-SO4)2]; and complex 4, [(L1)2(H2O)2(Mn)2(μ-SO4)2], reveal the formation of sulfate-bridged eight-membered crownlike binuclear complexes, similar to one of the concentration-dependent dimeric forms of MSO4 as observed in solid state. Finally, L1 is found to be highly efficient in removing ZnSO4 from both aqueous and semiaq. medium as complex 1 in the presence of other competing ZnII salts via precipitation through crystallization Powder X-ray diffraction anal. has also confirmed bulk purity of complex 1 obtained from the above competitive crystallization experiment In addition to this study using 2-(Bromomethyl)pyridine hydrobromide, there are many other studies that have used 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8SDS of cas: 31106-82-8) was used in this study.
2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) belongs to pyridine. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Additionally, pyridine-based natural products continue to be discovered and studied for their properties and to understand their biosynthesis.SDS of cas: 31106-82-8