Optical and structural studies of a two-dimensional organic Mott insulator dimethylphenazine-tetrafluorotetracyanoquinodimethane

Electronic structure of an organic charge-transfer complex, M2P-TCNQF4 (M2P: 5,10-dihydro-5,10-dimethylphenazine; TCNQF4: 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane), was investigated by means of optical reflection spectroscopy and x-ray structural analyses. This is an ionic compound and has a unique quasi-two-dimensional (2D) crystal structure in which donor (D) molecules of M2P and acceptor (A) molecules of TCNQF4 stack respectively …