Synthesis, Crystal Structure and Characterization of Two Cobalt (II) Complexes Based on Pyridine Carboxylic Acid Ligands

Abstract

Two undocumented cobalt (II) complexes 3pydc)namely Co-MOF 2), were successfully synthesized by solvothermal method. The X-ray single crystal diffraction, infrared spectrometer (IR), UV-Vis spectrum and X-ray diffraction were used to characterize and analyze the structure of the two MOFs. The single crystal structure analysis showed that Co-MOF 1 reconnected by CoÀ N bond and CoÀ O bond to form a onedimensional chains. The Co-MOF 2 was connected by CoÀ O and CoÀ N bonds to form a one-dimensional chain.The results indicated that complexes Co-MOF 1 and Co-MOF 2 have a certain thermal stability and fluorescence properties.

Generation of Strong Basicity in Metal–Organic Frameworks: How Do Coordination Solvents Matter?

“…It can also be seen from the IR spectra of the samples K/MIL-53-H(A) and K/MIL-53-D(A) that partial degradation of the MOF structure leads to the formation of CO vibration bands at around 1384 cm −1 , which overlaps N−O vibration of KNO 3 (Figure 3B). 40,41 The N 2 sorption of MIL-53 gives a type I isotherm with a surface area of 1281 m 2 g −1 and a pore size distribution centered at 1.1 nm (Figure 5 and Table 1). 42,43 In the case of K/MIL-53-D(A), the isotherm is similar to that of MIL-53 and the surface area only decreases slightly after the generation of strong basicity (1149 m 2 g −1 ).…”