Journal of Physical Chemistry B 2006-09-28

Investigation of the excited state structure of DCM via ultrafast electronic pump/vibrational probe.

Aaron J Van Tassle, Matthew A Prantil, Graham R Fleming

Index: J. Phys. Chem. B 110(38) , 18989-95, (2006)

Full Text: HTML

Abstract

Time resolved visible pump, infrared probe transient absorption measurements of the solutes 4-dicyanomethylene-2-methyl-6-(p-(dimethylamino)styryl)-4H-pyran (DCM) and its isotopomer DCM-d6 are employed to probe the dynamics of charge transfer state formation in dimethyl sulfoxide (DMSO) and acetonitrile (MeCN). We observe a two stage charge transfer (CT): the first step is an instrument-response-limited charge separation to the dicyanomethylene group, and the second involves a structural evolution of the dimethylamino group. Theoretical calculations and isotopic substitution indicate that the observed vibration is due to the dimethylamino group twisting out of plane, stabilizing the charge separation.

Related Compounds

  • 4-(dicyanomethylen...

Related Articles:

Microstructure, morphology, and ultrafast dynamics of a novel edible microemulsion.

2012-06-05

[Langmuir 28(22) , 8309-17, (2012)]

Effect of ionic liquid on diffusion in P123 gel: fluorescence correlation spectroscopy.

2012-05-14

[ChemPhysChem 13(7) , 1942-8, (2012)]

Manipulation of spontaneous emission dynamics of organic dyes in the porous silicon matrix.

2010-01-01

[J. Fluoresc. 20(1) , 283-90, (2010)]

Hydroxy-terminated conjugated polymer nanoparticles have near-unity bright fraction and reveal cholesterol-dependence of IGF1R nanodomains.

2013-02-26

[ACS Nano 7 , 1137-44, (2013)]

Spectrofluorometer based on acousto-optic tunable filters for rapid scanning and multicomponent sample analyses.

1993-07-01

[Anal. Chem. 65(13) , 1675-81, (1993)]

More Articles...