Conformational changes in photoexcited (R)-(+)-1,1′-Bi-2-naphthol studied by time-resolved circular dichroism

Claire Niezborala; François Hache

doi:10.1021/ja8039844

Conformational changes in photoexcited (R)-(+)-1,1′-Bi-2-naphthol studied by time-resolved circular dichroism

Claire Niezborala
, François Hache

Research output: Contribution to journal › Article › peer-review

Abstract

Conformational changes following photoexcitation of (R)-(+)-1,1′-bi- 2-naphthol are studied with a time-resolved circular dichroism (CD) experiment. Two wavelengths are investigated. For λ = 237 nm, we observe a bleaching of the ground-state absorption and a transient CD structure. Thanks to a coupled-oscillator calculation, we can attribute this effect to a decrease of the dihedral angle. For λ = 245 nm, excited-state absorption and CD are observed. All these effects are solvent-dependent. In particular, it is shown that dynamics is slower in a protic solvent, which is attributed to hydrogen-bonding of the hydroxy groups with the solvent.

Original language	English
Pages (from-to)	12783-12786
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	130
Issue number	38
DOIs	https://doi.org/10.1021/ja8039844
Publication status	Published - 24 Sept 2008

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title = "Conformational changes in photoexcited (R)-(+)-1,1′-Bi-2-naphthol studied by time-resolved circular dichroism",

abstract = "Conformational changes following photoexcitation of (R)-(+)-1,1′-bi- 2-naphthol are studied with a time-resolved circular dichroism (CD) experiment. Two wavelengths are investigated. For λ = 237 nm, we observe a bleaching of the ground-state absorption and a transient CD structure. Thanks to a coupled-oscillator calculation, we can attribute this effect to a decrease of the dihedral angle. For λ = 245 nm, excited-state absorption and CD are observed. All these effects are solvent-dependent. In particular, it is shown that dynamics is slower in a protic solvent, which is attributed to hydrogen-bonding of the hydroxy groups with the solvent.",

author = "Claire Niezborala and Fran{\c c}ois Hache",

year = "2008",

month = sep,

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journal = "Journal of the American Chemical Society",

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AU - Niezborala, Claire

AU - Hache, François

PY - 2008/9/24

Y1 - 2008/9/24

N2 - Conformational changes following photoexcitation of (R)-(+)-1,1′-bi- 2-naphthol are studied with a time-resolved circular dichroism (CD) experiment. Two wavelengths are investigated. For λ = 237 nm, we observe a bleaching of the ground-state absorption and a transient CD structure. Thanks to a coupled-oscillator calculation, we can attribute this effect to a decrease of the dihedral angle. For λ = 245 nm, excited-state absorption and CD are observed. All these effects are solvent-dependent. In particular, it is shown that dynamics is slower in a protic solvent, which is attributed to hydrogen-bonding of the hydroxy groups with the solvent.

AB - Conformational changes following photoexcitation of (R)-(+)-1,1′-bi- 2-naphthol are studied with a time-resolved circular dichroism (CD) experiment. Two wavelengths are investigated. For λ = 237 nm, we observe a bleaching of the ground-state absorption and a transient CD structure. Thanks to a coupled-oscillator calculation, we can attribute this effect to a decrease of the dihedral angle. For λ = 245 nm, excited-state absorption and CD are observed. All these effects are solvent-dependent. In particular, it is shown that dynamics is slower in a protic solvent, which is attributed to hydrogen-bonding of the hydroxy groups with the solvent.

U2 - 10.1021/ja8039844

DO - 10.1021/ja8039844

M3 - Article

AN - SCOPUS:52449108658

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JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 38

ER -

Conformational changes in photoexcited (R)-(+)-1,1′-Bi-2-naphthol studied by time-resolved circular dichroism

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