Crystal structure, physical and photophysical properties of a platinum(II) complex coordinated to the biphenyl dianion and cyclooctadiene
Perkovic, Marc W.
Rillema, D. Paul
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Chen, Y.; Woods, Clifton; Perkovic, Marc W.; Rillema, D. Paul. 1996. Crystal structure, physical and photophysical properties of a platinum(II) complex coordinated to the biphenyl dianion and cyclooctadiene. Journal of Chemical Crystallography, v.26 no.8 pp.527-531
The complex, Pt(bph)(COD), where bph is the biphenyl dianion and COD is 1,5-cyclooctadiene, crystallizes in the orthorhombic space groupPbca witha=12.178(4) Å,b=9.693(3) Å andc=25.344(9) Å andZ=8. The Pt−C distances to the olefinic carbon atoms that result from the π electron donation of the COD ligand are in the range 2.20(3)−2.27(3) Å and the Pt−C distances to the σ bonded bph ligand are shorter at 2.01(3)−2.03(2) Å. The lowest energy absorption of the complex is at 383 nm (ε=1.2×103). The emission spectrum is structured in fluid solution at room temperature with the emission energy maximum at 537 nm, φcm, and τ=1.93 μs. Temperature dependent emission lifetime measurements result in ak o value of 2.69×104, a preexponential factor of 2.47×106 and a ΔE1 value of 324 cm−1.
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