85565-27-1Relevant academic research and scientific papers
Electronic Absorption and Emission Spectra of Binuclear Platinum(II) Complexes. Characterization of the Lowest Singlet and Triplet Excited States of Pt2(H2P2O5)44-
Rice, Steven F.,Gray, Harry B.
, p. 4571 - 4575 (1983)
The low-temperature electronic absorption and emission spectra of single crystals containing a binuclear platinum anion, Pt2(H2P2O5)44-, have been measured and analyzed.Absorption systems in the 450- and 360-nm regoins are attributable to transitions to d?*p? excited states 3A2u and 1A2u, respectively).The Pt-Pt stretching frequency in the 3A2u state (155 cm-1) is much larger than that (110 cm-1) in the ground state (the 3A2u absorption as well as the fluorescence (1A2u -> 1A1g)and phosphorescence (3A2u -> 1A1g) spectra exhibit Pt-Pt stretching progressions), which accords with the d?*p? description of the excited state.The Pt-Pt bond is calculated to contrast by 0.21 Angstroem in the 3A2u state (relative to the ground-state value of 2.92 Angstroem).Measurements of the phosphorescence spectrum of Ba2Pt2(H2P2O5)4 at low temperatures (8-4.2 K) confiirm that there are two emitting levels split by 40.9 cm-1 (origins at 476.55 and 477.48 nm are assigned to the Eu and A1u spin-orbit components of 3A2u).
