While the emission of complex 4b was very weak, it represents an original example of dinuclear species in which a 1,2,3-triazole ring is bound to two rhenium in low oxidation state.
Finally, after addition of 24.2 μM Hg2+ concentration, the fluorescent emission of complex remains constant, which is attributed to the depletion of Rh-UTES derivative.
The emissions of complexes 1c 1f with electron-donating or extended π-conjugation substituents are assigned to the 3MLCT states.
Furthermore, the fluorescence emissions of complexes 3 and 4 in a solid state at room temperature may be assigned to ligand-to-metal charge-transfer (LMCT).
The lowest energy emissions of complexes 1 6 at the PBE0 level are localized at 663, 656, 660, 659, 647 and 656 nm, respectively.
The intense emission bands of complexes 1-5 theireir corresponding ligands implies that the emission peaks of 1-5 may be due to a metal-to-ligand charge transfer (MLCT) and/or ligand-to-metal charge transfer (LMCT).
The ligands and metal complexes were subjected to fluorescence properties and exhibited that the variable fluorescence emission behavior of complexes.
Figure 20 Solid-state emission spectra of complexes 1-5.
The emissions of Complex 1 and Complex 2 are yellow and yellowish-green in acetonitrile solution.
Characteristic emissions of complex of terbium ion with o-benzoylbenzoate ion and 1, 10-phenathroline (Tb o-BBA)3(phen)) based on organic–inorganic heTb o-BBActure device were obtained.
