Jump to main content
Jump to site search

Issue 30, 2015
Previous Article Next Article

The effect of cluster size on the optical band gap energy of Zn-based metal–organic frameworks

Author affiliations

Abstract

We have synthesized three Metal–Organic Frameworks (MOFs) in which Zn metal ions form the secondary building unit, and 4,4′-sulfonyldibenzoic acid (SDB) serves as the ligand: [[Zn(DMF)(SDB)](DMF), 1, [Zn3(DMF)3(SDB)3](DMF), 2 and [Zn3(OH)2(SDB)2] (DMF)2, 3, where DMF = dimethyl formamide]. Compound 1 contains a paddle-wheel type Zn dimer, compound 2 contains a Zn trimer motif, and 3 contains a one-dimensional Zn–OH–Zn chain. These building units may be considered to be Zn clusters. We have measured and theoretically calculated the band gap energy and by theoretical investigations we found that the cluster size plays an important role in the band gap energy, however additional effects are observed. The larger cluster size corresponds to a larger band gap energy, however the cavity of the trimer based compound (2) traps a solvent molecule that decreases the band gap energy.

Graphical abstract: The effect of cluster size on the optical band gap energy of Zn-based metal–organic frameworks

Back to tab navigation

Supplementary files

Publication details

The article was received on 05 Jun 2015, accepted on 24 Jun 2015 and first published on 24 Jun 2015


Article type: Communication
DOI: 10.1039/C5DT02132D
Citation: Dalton Trans., 2015,44, 13464-13468
  •   Request permissions

    The effect of cluster size on the optical band gap energy of Zn-based metal–organic frameworks

    R. Ghosh, A. F. Pedicini, P. C. Rao, K. S. Asha, A. C. Reber and S. Mandal, Dalton Trans., 2015, 44, 13464
    DOI: 10.1039/C5DT02132D

Search articles by author

Spotlight

Advertisements