Aqueous room temperature synthesis of cobalt and zinc sodalite zeolitic imidizolate frameworks

Abstract

Sodalite zeolitic imidazolate frameworks containing Co (ZIF-67) and Zn (ZIF-8) were synthesized at room temperature under aqueous conditions in 10 min. A trialkylamine deprotonated the 2-methylimidazole ligand and nucleated the frameworks. Furthermore, the ligand acted as a structure directing agent in place of an organic solvent.

Biological applications of zinc imidazole framework through protein encapsulation

“…The X-ray diffraction (XRD) patterns for ZIF-8 are in an agreement with those reported from the literature (Watson et al 2002;Pan et al 2011;Gross et al 2012;Kida et al 2013). The main indices of all X-ray diffraction peaks (011, 002, 112, 013, and 222) to a sodalities structure have shown excellent concordance with crystal formation, as reported previously (Watson et al 2002;Pan et al 2011;Gross et al 2012;Kida et al 2013) (Fig.…”

“…The main indices of all X-ray diffraction peaks (011, 002, 112, 013, and 222) to a sodalities structure have shown excellent concordance with crystal formation, as reported previously (Watson et al 2002;Pan et al 2011;Gross et al 2012;Kida et al 2013) (Fig. 2: ZIF-BSA a).…”

“…Initially, studies have shown that ZIF-8 can easily adsorb molecules much larger than its window size. It directly confirmed the occurrence of encapsulation Watson et al 2002;Pan et al 2011;Gross et al 2012;Kida et al 2013). TEM images of blank ZIF-8 crystal (of less than 15 nm) are also shown in Fig.…”

“…In addition, hybrid crystals have a similar shape compared to those of ZIF-8, which reflects the overall result of the faster homogeneous nucleation growth. Likewise, recent studies clearly indicated that ZIF-8 was able to easily adsorb molecules that have a much larger size than their window (3.4 Å ) size (Watson et al 2002;Pan et al 2011;Gross et al 2012;Kida et al 2013). …”

“…The calculations were performed at B3LYP/ 6-31 ? G (d) level of DFT theory of Gaussian 3.0 with atomic coordinates and thermal anisotropic parameters for all non-hydrogen atoms (Watson et al 2002;Pan et al 2011;Gross et al 2012;Kida et al 2013). Carbons and hydrogens of crystalline structures were included in the calculation of structure factor at idealized positions using the basic set B3LYP/6-31 ?…”