Electronic and vibrational properties of a MOF-5 metal-organic framework: ZnO quantum dot behaviour

Chem Commun (Camb). 2004 Oct 21:(20):2300-1. doi: 10.1039/b407246d. Epub 2004 Sep 1.

Abstract

UV-Vis DRS and photoluminescence (PL) spectroscopy, combined with excitation selective Raman spectroscopy, allow us to understand the main optical and vibrational properties of a metal-organic MOF-5 framework. A O(2-)Zn(2+)[rightward arrow] O(-)Zn(+) ligand to metal charge transfer transition (LMCT) at 350 nm, testifies that the Zn(4)O(13) cluster behaves as a ZnO quantum dot (QD). The organic part acts as a photon antenna able to efficiently transfer the energy to the inorganic ZnO-like QD part, where an intense emission at 525 nm occurs.