期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 131, 期 2, 页码 502-508出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja804485d
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- DANSCATT
The structure of the (3)A(2u) excited state of tetrakis-mu-pyrophosphitodiplatinate(II) in aqueous solution is investigated by time-resolved X-ray scattering on a time scale from 100 ps to 1 mu s after optical pumping. The primary structural parameter, the Pt-Pt distance, is found to be 2.74 angstrom, which is 0.24 angstrom shorter than the ground-state value. The contraction is in excellent agreement with earlier estimates based on spectroscopic data in solution and diffraction data in the crystalline state. As a second structural parameter, the distance between the P planes in the (3)A(2u) excited state was determined to be 2.93 angstrom, i.e., the same as that in the ground state. This result implies that a slight lengthening of the Pt-P bond occurs following excitation.
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