Observing photochemical transients by ultrafast x-ray absorption spectroscopy

被引：166

作者：

Saes, M

Bressler, C ^{[1
]}

Abela, R

Grolimund, D

Johnson, SL

Heimann, PA

Chergui, M

机构：

[1] Univ Lausanne, Inst Phys Mat Condensee, BSP, CH-1015 Lausanne, Switzerland

[2] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland

[3] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[4] Lawrence Berkeley Natl Labs, Adv Light Source, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.90.047403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Accurate determination of the transient electronic structures, which drive photochemical reactions, is crucial in chemistry and biology. We report the detection of transient chemical changes on the picosecond time scale by x-ray-absorption near-edge structure of photoexcited aqueous [Ru(bpy)(3)](2+). Upon ultrashort laser pulse excitation a charge transfer excited state having a 300 ns lifetime is formed. We detect the change of oxidation state of the central Ru atom at its L-3 and L-2 edges, at a temporal resolution of 100 ps with the zero of time unambiguously determined.

引用

页数：4

共 20 条

[1]

[Anonymous], 2001, ELECT TRANSFER CHEM

[2] Towards structural dynamics in condensed chemical systems exploiting ultrafast time-resolved x-ray absorption spectroscopy [J].