Temporal mapping of photochemical reactions and molecular excited states with carbon specificity

被引：0

作者：

Wang, K. ^{[1
,2
]}

Murahari, P. ^{[2
]}

Yokoyama, K. ^{[2
,3
]}

Lord, J. S. ^{[3
]}

Pratt, F. L. ^{[3
]}

He, J. ^{[1
]}

Schulz, L. ^{[1
]}

Willis, M. ^{[1
]}

Anthony, J. E. ^{[4
]}

Morley, N. A. ^{[5
]}

Nuccio, L. ^{[6
,7
]}

Misquitta, A. ^{[2
]}

Dunstan, D. J. ^{[2
]}

Shimomura, K. ^{[8
]}

Watanabe, I. ^{[9
]}

Zhang, S. ^{[1
]}

Heathcote, P. ^{[10
]}

Drew, A. J. ^{[1
,2
,3
]}

机构：

[1] Sichuan Univ, Coll Phys Sci & Technol, Chengdu 610064, Sichuan, Peoples R China

[2] Queen Mary Univ London, Sch Phys & Astron, London E1 4NS, England

[3] Rutherford Appleton Lab, ISIS Muon Facil, Didcot OX11 0QX, Oxon, England

[4] Univ Kentucky, Dept Chem, Lexington, KY 40506 USA

[5] Univ Sheffield, Dept Mat Sci & Engn, Sheffield S1 3JD, S Yorkshire, England

[6] Univ Fribourg, Dept Phys, Chemin Musee 3, CH-1700 Fribourg, Switzerland

[7] Fribourg Ctr Nanomat, Chemin Musee 3, CH-1700 Fribourg, Switzerland

[8] J PARC Ctr, Mat & Life Sci Div, Tokai, Ibaraki 3191195, Japan

[9] RIKEN, RAL, Nishina Ctr, 2-1 Hirosawa, Wako, Saitama 3510198, Japan

[10] Queen Mary Univ London, Sch Biol & Chem Sci, London E1 4NS, England

来源：

NATURE MATERIALS | 2017年 / 16卷 / 04期

基金：

欧洲研究理事会;

关键词：

LIGHT-EMITTING-DIODES; MUONIUM; FISSION; ULTRAVIOLET;

D O I：

10.1038/NMAT4816

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Photochemical reactions are essential to a large number of important industrial and biological processes. A method for monitoring photochemical reaction kinetics and the dynamics of molecular excitations with spatial resolution within the active molecule would allow a rigorous exploration of the pathway and mechanism of photophysical and photochemical processes. Here we demonstrate that laser-excited muon pump-probe spin spectroscopy (photo-mu SR) can temporally and spatially map these processes with a spatial resolution at the single-carbon level in a molecule with a pentacene backbone. The observed time-dependent light-induced changes of an avoided level crossing resonance demonstrate that the photochemical reactivity of a specific carbon atom is modified as a result of the presence of the excited state wavefunction. This demonstrates the sensitivity and potential of this technique in probing molecular excitations and photochemistry.

引用

页码：467 / +

页数：8

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