Synthesis and Spectroscopic and Computational Characterization of Zn₄O(Alicyclic or Aromatic Carboxylate)₆ Complexes as Potential MOF Precursors

Abstract

Potential metal-organic-framework precursors, Zn(4)O complexes with various alicyclic or aromatic carboxylate ligands, were prepared, in many cases quantitatively, from ZnO and the relevant carboxylic acids in the presence of trace amounts of water. The complexes obtained were characterized with various classical (titration) and instrumental (IR and NMR spectroscopies) methods and molecular modeling (PM3 and PM6 semiempirical quantum chemical methods and HF/6-31G** ab initio calculations). Structural peculiarities reflected in the success or failure in the synthesis could be rationalized with the combination of IR and NMR spectroscopies and molecular modeling.

Stability studies on a sensitive EUV photoresist based on zinc metal oxoclusters

“…This might result from partial hydrolysis and/or rearrangement of the organic shell. Yet, the presence of the characteristic Zn-O-Zn stretching band of the tetrameric oxo core 37 indicates that the degradation was only partial.…”