Luminescent iridium(I), rhodium(I), and platinum(II) dithiolate complexes

Electronic Spectra of Single-Crystal Maleonitriledithiolate Complexes of Iridium (I): [Ir(CO)2mnt] TBA (mnt ≡ [S2C2(CN)2]2-; TBA ≡ [(C4H9)4N] + )

“…The ab sorption band D and the two shoulders C and B can be assigned to the singlet-singlet charge transfer tran sition 1A1 1A2 and to two superimposed vibrations (vvib ~ 205 cm-1 and ~410cm -1), respectively, cf. [16].…”

“…2 results from a superposition of the totally symmetric C = C vibration of the ligand mnt [16]. For the peaks between the dominant bands probably other vibrations of the com plex ion are responsible, but a definite assignment cannot be given because corresponding raman data are not available.…”

“…Application of the method de scribed in [16] has been found to be ineffective because of the low yield and the poor purity of the product. Light-brownish single crystals of the compound (size (~ 0.1 x 0.2 x 0.05) mm3) have been obtained from acetonitril solutions at room temperature.…”

“…Since the bis(maleonitriledithiolate) complex of iridium(I) seems to be not stable, iridium(I) complexes with mixed ligand systems such as [Ir(CO)2mnt]~ have been used for experimental studies. Recently results of NMR, IR and electronic absorption spectroscopy with liquid solutions (room temperature) and glassy solutions (T~ 77 K) of this compound have been reported [16].…”

Profile of Richard Eisenberg

“…At his first opportunity, Eisenberg rifled through the drawers of his laboratory in the dark, shining a UV lamp on everything he could find. He quickly discovered that several of the metal dithiolene compounds that his laboratory had synthesized over the years were brightly luminescent (11)(12)(13).…”