Crystal structure, physical and photophysical properties of a platinum(II) complex coordinated to the biphenyl dianion and cyclooctadiene

Autor: Y.Y. Chen, Clifton Woods, Marc W. Perkovic, D. Paul Rillema
Rok vydání: 1996
Předmět:
Zdroj: Journal of Chemical Crystallography. 26:527-531
ISSN: 1572-8854
1074-1542
DOI: 10.1007/bf01668410
Popis: The complex, Pt(bph)(COD), where bph is the biphenyl dianion and COD is 1,5-cyclooctadiene, crystallizes in the orthorhombic space group Pbca with a = 12.178(4) {Angstrom}, b = 9.693(3) {Angstrom} and c = 25.344(9) {Angstrom} and Z = 8. The Pt-C distances to the olefinic carbon atoms that result from the {pi} electron donation of the COD ligand are in the range 2.20(3)-2.27(3) {Angstrom} and the Pt-C distances to the {sigma} bonded bph ligand are shorter at 2.01(3)-2.03(2) {Angstrom}. The lowest energy absorption of the complex is at 383 nm ({epsilon}=1.2 x 10{sup 3}). The emission spectrum is structured in fluid solution at room temperature with the emission energy maximum at 537 nm, {phi}{sub em} = 1.68 x 10{sup {minus}3}, and {tau} = 1.93 {mu}s. Temperature dependent emission lifetime measurements result in a k{sub o} value of 2.69 x 10{sup 4}, a preexponential factor of 2.47 x 10{sup 6} and a {delta}E{sub 1} value of 324 cm{sup {minus}1}.
Databáze: OpenAIRE
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