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Resolving the excited state relaxation dynamics of guanosine monomers and hydrogen-bonded homodimers in chloroform solution

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Resolving the excited state relaxation dynamics of guanosine monomers and hydrogen-bonded homodimers in chloroform solution. / Ingle, Rebecca; Roberts, Gareth; Roettger, Katharina; Marroux, Hugo; Sönnichsen, Frank; Yang, Ming; Szyc, Łukasz; Harabuchi, Yu; Maeda, S; Temps, Friedrich; Orr-Ewing, Andrew.

In: Chemical Physics, Vol. 515, 14.11.2018, p. 480-492.

Research output: Contribution to journalArticle

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Ingle, R, Roberts, G, Roettger, K, Marroux, H, Sönnichsen, F, Yang, M, Szyc, Ł, Harabuchi, Y, Maeda, S, Temps, F & Orr-Ewing, A 2018, 'Resolving the excited state relaxation dynamics of guanosine monomers and hydrogen-bonded homodimers in chloroform solution', Chemical Physics, vol. 515, pp. 480-492. https://doi.org/10.1016/j.chemphys.2018.07.014

APA

Vancouver

Ingle R, Roberts G, Roettger K, Marroux H, Sönnichsen F, Yang M et al. Resolving the excited state relaxation dynamics of guanosine monomers and hydrogen-bonded homodimers in chloroform solution. Chemical Physics. 2018 Nov 14;515:480-492. https://doi.org/10.1016/j.chemphys.2018.07.014

Author

Ingle, Rebecca ; Roberts, Gareth ; Roettger, Katharina ; Marroux, Hugo ; Sönnichsen, Frank ; Yang, Ming ; Szyc, Łukasz ; Harabuchi, Yu ; Maeda, S ; Temps, Friedrich ; Orr-Ewing, Andrew. / Resolving the excited state relaxation dynamics of guanosine monomers and hydrogen-bonded homodimers in chloroform solution. In: Chemical Physics. 2018 ; Vol. 515. pp. 480-492.

Bibtex

@article{01c7140def014001a257e39a4fda3e4b,
title = "Resolving the excited state relaxation dynamics of guanosine monomers and hydrogen-bonded homodimers in chloroform solution",
abstract = "The relaxation pathways of silyl-modified guanosine nucleoside monomers (G) and double-hydrogen-bonded homodimers (GG1) are compared in chloroform solution after 260-nm ultraviolet excitation. Transient absorption spectra support two previously reported relaxation pathways for the monomer with time constants of 210 ± 20 fs and 2.6 ± 0.1 ps. These pathways are associated with bifurcated approach to a seam of conical intersections between the excited 1ππ* 1La state and the ground electronic state. In the homodimer, an increase in the larger time constant to 18 ± 2 ps is attributed to slower passage through the minimum energy region of the 1ππ* state. A further time constant of 70 ± 10 fs indicates wavepacket evolution out of the 1ππ* state Franck-Condon region. A slow component of recovery of ground-state GG1 is proposed to result either from relaxation of the product of inter-base electron-driven proton transfer, or from the lowest triplet state (3ππ*, T1).",
author = "Rebecca Ingle and Gareth Roberts and Katharina Roettger and Hugo Marroux and Frank S{\"o}nnichsen and Ming Yang and Łukasz Szyc and Yu Harabuchi and S Maeda and Friedrich Temps and Andrew Orr-Ewing",
year = "2018",
month = "11",
day = "14",
doi = "10.1016/j.chemphys.2018.07.014",
language = "English",
volume = "515",
pages = "480--492",
journal = "Chemical Physics",
issn = "0301-0104",
publisher = "North-Holland Publishing Company",

}

RIS - suitable for import to EndNote

TY - JOUR

T1 - Resolving the excited state relaxation dynamics of guanosine monomers and hydrogen-bonded homodimers in chloroform solution

AU - Ingle, Rebecca

AU - Roberts, Gareth

AU - Roettger, Katharina

AU - Marroux, Hugo

AU - Sönnichsen, Frank

AU - Yang, Ming

AU - Szyc, Łukasz

AU - Harabuchi, Yu

AU - Maeda, S

AU - Temps, Friedrich

AU - Orr-Ewing, Andrew

PY - 2018/11/14

Y1 - 2018/11/14

N2 - The relaxation pathways of silyl-modified guanosine nucleoside monomers (G) and double-hydrogen-bonded homodimers (GG1) are compared in chloroform solution after 260-nm ultraviolet excitation. Transient absorption spectra support two previously reported relaxation pathways for the monomer with time constants of 210 ± 20 fs and 2.6 ± 0.1 ps. These pathways are associated with bifurcated approach to a seam of conical intersections between the excited 1ππ* 1La state and the ground electronic state. In the homodimer, an increase in the larger time constant to 18 ± 2 ps is attributed to slower passage through the minimum energy region of the 1ππ* state. A further time constant of 70 ± 10 fs indicates wavepacket evolution out of the 1ππ* state Franck-Condon region. A slow component of recovery of ground-state GG1 is proposed to result either from relaxation of the product of inter-base electron-driven proton transfer, or from the lowest triplet state (3ππ*, T1).

AB - The relaxation pathways of silyl-modified guanosine nucleoside monomers (G) and double-hydrogen-bonded homodimers (GG1) are compared in chloroform solution after 260-nm ultraviolet excitation. Transient absorption spectra support two previously reported relaxation pathways for the monomer with time constants of 210 ± 20 fs and 2.6 ± 0.1 ps. These pathways are associated with bifurcated approach to a seam of conical intersections between the excited 1ππ* 1La state and the ground electronic state. In the homodimer, an increase in the larger time constant to 18 ± 2 ps is attributed to slower passage through the minimum energy region of the 1ππ* state. A further time constant of 70 ± 10 fs indicates wavepacket evolution out of the 1ππ* state Franck-Condon region. A slow component of recovery of ground-state GG1 is proposed to result either from relaxation of the product of inter-base electron-driven proton transfer, or from the lowest triplet state (3ππ*, T1).

U2 - 10.1016/j.chemphys.2018.07.014

DO - 10.1016/j.chemphys.2018.07.014

M3 - Article

VL - 515

SP - 480

EP - 492

JO - Chemical Physics

JF - Chemical Physics

SN - 0301-0104

ER -