The Special Case of the Spectral Emission of a Tb³⁺ Mono Metal Complex

Abstract

The fine structure in the spectral lines of the visible fluorescence of Tb3+ complexes are replaced by a single peak in the case of a singular molecular complex Tb(H3PTC)3, where H4PTC represents perylene‐3,4,9,10‐tetracarboxylic acid, and its emission wavelength depends on the film thickness. This single peak challenges the old creed that the f‐orbital electrons of Tb3+ are always protected from the influence of the surrounding atoms. We perform density functional theory calculations to show that the wavefunction of the ground state is localized and in addition, spin‐polarized, and this facilitates fluorescent transitions under UV to the first excited state instead of the fundamental state. We discuss the possibility of making a spintronic device with the molecule, Tb(H3PTC)3.

Iridium and Ruthenium Complexes Bearing Perylene Ligands

“…10 Measured in nPrCN at 77 K. 11 Measured at 77 K in 4:1 EtOH:MeOH. 12 Associated with the metal-to-ligand charge transfer (MLCT) transition. 13 Associated with the PDI ligand transition.…”

“…11 Measured in ACN. 12 Using Fc/Fc + as an internal standard. 13 Process associated with the imidazole.…”

“…The imide functionalization is not associated with the optical properties arising from the perylene core, but with the solubility of the derivative [9], whereas the ortho and bay functionalization are strongly related with the spectroscopic features of the PDI [10]. Although many studies about the synthesis and application of various organic perylene dyes have been reported in the literature, only a restricted number of papers describing coordination compounds containing a perylene core can be found [11][12][13]. Iridium and ruthenium complexes are particularly fascinating; they are widely employed in research fields, such as bioimaging, photodynamic therapy, and solar energy conversion.…”

“…Moving to the field of solar energy conversion, dye-sensitized solar cells (DSSCs) represent an important attempt to produce efficient, cheaper, and greener photovoltaic devices. This kind of solar cell is not based on semiconductors, such as silicon, but instead exploits the spectral and electrochemical properties of a dye deposited over a photoanode made of a thin film of TiO2 over a conductive glass, such as fluorinated tin oxide Although many studies about the synthesis and application of various organic perylene dyes have been reported in the literature, only a restricted number of papers describing coordination compounds containing a perylene core can be found [11][12][13]. Iridium and ruthenium complexes are particularly fascinating; they are widely employed in research fields, such as bioimaging, photodynamic therapy, and solar energy conversion.…”

“…Dye adsorbed on a TiO 2 film 11. Using Ag/AgCl as reference electrode and converted to a normal hydrogen electrode (NHE, Ag/AgCl = 0.22 vs. NHE) 12. Measured in ACN.…”