Delamination, synthesis, crystal structure and thermal properties of the layered metal-organic compound Zn(C12H14O4)

Abstract

Zn(C 12 H 14 O 4 ) was prepared by hydrothermal methods. The crystal structure was determined on the basis of high resolution synchrotron powder diffraction data. The crystal structure of Zn(C 12 H 14 O 4 ) is monoclinic, space group Cc with a ¼ 7.813 A ˚, b ¼ 20.392 A ˚, c ¼ 6.849 A ˚, b ¼ 92.38 , V ¼ 1090.295 A ˚3 and Z ¼ 4. The compound is a metal organic layered structure (MOLS) where each of the layers is constructed on a basis of infinite chains of tetrahedrally coordinated Zn atoms. The Zn chain atoms are solely bound together by carboxylate groups. This represents an unusual structural feature. The compound has only weak van der Waals interactions between the layers. We have proved that delamination is feasible for this metal-organic compound in both ethanol and acetone. It represents an interesting material for potential restacking of delaminated materials into novel hybrid type nanocomposites. Experimental Synthesis of Zn(C 12 H 14 O 4 ) 0.76 g Zn(NO 3 )$6H 2 O (Aldrich, 98%), 0.45 g adamantanedicarboxylic acid, C 12 H 14 O 4 (Aldrich, 98%) and 0.20 g NaOH (Merck, pro analysis) were dissolved in 18.92 g H 2 O while stirring. The mixture was poured into a Teflon-lined steel autoclave,

Structural Engineering of Low‐Dimensional Metal–Organic Frameworks: Synthesis, Properties, and Applications

“…In another example, Wang and coworkers synthesized ultrathin Zr-TCPP(Ni) nanosheets with thickness of ≈1.48 nm through precisely controlling the concentration of modulator, i.e., monocarboxylic acids (formic acid, acetic acid, lauric acid, or oleic acid). In this regard, the synthetic methods without adding other molecules to achieve anisotropic growth of MOF nanosheets have received considerable attentions, such as the approaches via kinetic [158] Copyright 2008, Royal Society of Chemistry. The introduced modulator can occupy a portion of coordination sites of Zr 6 SBUs, resulting in weakened interlayer interaction within the bulk MOF crystal.…”

Recent Advances on Anilato-Based Molecular Materials with Magnetic and/or Conducting Properties

“…The solution-based exfoliation procedure is less effective in the neutral coordination polymers which can be completely delaminated (with a thickness ca. 1-1.5 nm) [115,170,[176][177][178][179][180][181][182][183]. The stronger interlayer interactions in these hybrid compounds compared with the weaker van der Waals interactions observed in neutral 2D coordination polymers could be responsible of the lower degree of exfoliation.…”

Alkaline earth layered benzoates as reusable heterogeneous catalysts for the methyl esterification of benzoic acid

“…The small decrease in the crystallinity of CaBZ ( Figure 3S, supplementary material) and SrBZ ( Figure 4S, supplementary material) can be attributed to the restructuring of layers that were not perfectly stacked, 25 as well as to the different times to which the reused benzoates were subjected in the new crystallization process. On the other hand, the FTIR spectra of the solids recovered after esterification of benzoic acid with methanol ( Figure 6 and Figures 5S and 6S, supplementary material) showed no significant change in the vibrational modes first seen in the original compounds, suggesting that the catalysts retained their structural integrity after reaction completion (Figure 3).…”