Porphyrin-containing MOFs have attracted a significant amount of attention due to their photocatalytic potential that can be applied in light-harvesting devices. These porphyrin-containing MOFs are composed of carboxylate porphyrin and various transition metal ions, such as Zn2+,Cu2+,Fe2+ and Pd2+. In this work, we synthesized two Cu-porphyrin MOFs, CuTCPP and NAFS-2, both of which have a layered structure consisting H2TCPP (5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin) and copper ions. To compare their electronic and optical properties, we prepared ultra-thin film of each MOF by a Langmuir-Blodgett method. Our studies found CuTCPP exhibiting a high conductivity compared to NAFS-2 due to the porphyrin centers are occupied by copper ions. The structural difference was confirmed by UV/Vis/NIR spectra. Additionally, we calculated the energy bandgap of each nanosheet material and compared our experimental results with the natural bond orbital (NBO) analysis based on the density functional theory (DFT).

Electrical and optical studies of porphyrin-based two-dimensional metal-organic frameworks

255th National Meeting (2018)

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