Document Type
Article
Original Publication Date
2017
Journal/Book/Conference Title
Journal of Materials Chemistry C
Volume
2017
Issue
5
DOI of Original Publication
10.1039/c6tc03577a
Date of Submission
June 2017
Abstract
We have systematically studied a series of eight metal-organic frameworks (MOFs) in which the secondary building unit is a manganese trimer cluster, and the linkers are differently substituted benzene dicarboxylic acids (BDC). The optical band gap energy of the compounds vary from 2.62 eV to 3.57 eV, and theoretical studies find that different functional groups result in new states in the conduction band, which lie in the gap and lower the optical band gap energy. The optical absorption between the filled Mn 3d states and the ligands is weak due to minimal overlap of the states, and the measured optical band gap energy is due to transitions on the BDC linker. The Mn atoms in the MOFs have local moments of 5 mu B, and selected MOFs are found to be antiferromagnetic, with weak coupling between the cluster units, and paramagnetic above 10 K.
Rights
This journal is © The Royal Society of Chemistry 2017
Is Part Of
VCU Physics Publications
Comments
Originally published at http://dx.doi.org/10.1039/c6tc03577a