Capturing molecular structural dynamics by 100 ps time-resolved X-ray absorption spectroscopy

نویسندگان

  • Tokushi Sato
  • Shunsuke Nozawa
  • Kohei Ichiyanagi
  • Ayana Tomita
  • Matthieu Chollet
  • Hirohiko Ichikawa
  • Hiroshi Fujii
  • Shin-ichi Adachi
  • Shin-ya Koshihara
چکیده

An experimental set-up for time-resolved X-ray absorption spectroscopy with 100 ps time resolution at beamline NW14A at the Photon Factory Advanced Ring is presented. The X-ray positional active feedback to crystals in a monochromator combined with a figure-of-merit scan of the laser beam position has been utilized as an essential tool to stabilize the spatial overlap of the X-ray and laser beams at the sample position. As a typical example, a time-resolved XAFS measurement of a photo-induced spin crossover reaction of the tris(1,10-phenanthrorine)iron(II) complex in water is presented.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Direct observation of myoglobin structural dynamics from 100 picoseconds to 1 microsecond with picosecond X-ray solution scatteringwz

Myoglobin (Mb) is a heme protein that carries small-molecule ligands such as O2, CO and NO in muscles, and can be considered as a subunit of hemoglobin, a paradigm protein for the study of allostery. Due to its small size, availability and photosensitivity of the heme–ligand bond, Mb has served as a prototypical model system for studying protein structural dynamics. Accordingly, structural dyna...

متن کامل

Communication: The formation of rarefaction waves in semiconductors after ultrashort excitation probed by grazing incidence ultrafast time-resolved x-ray diffraction

We explore the InSb-semiconductor lattice dynamics after excitation of high density electron-hole plasma with an ultrashort and intense laser pulse. By using time resolved x-ray diffraction, a sub-mÅ and sub-ps resolution was achieved. Thus, a strain of 4% was measured in a 3 nm thin surface layer 2 ps after excitation. The lattice strain was observed for the first 5 ps as exponentially decayin...

متن کامل

Picosecond X-ray absorption spectroscopy of a photoinduced iron(II) spin crossover reaction in solution.

In this study, we perform steady-state and time-resolved X-ray absorption spectroscopy (XAS) on the iron K-edge of [Fe(tren(py)3)](PF6)2 dissolved in acetonitrile solution. Static XAS measurements on the low-spin parent compound and its high-spin analogue, [Fe(tren(6-Me-py)3)](PF6)2, reveal distinct spectroscopic signatures for the two spin states in the X-ray absorption near-edge structure (XA...

متن کامل

Time-Resolved X-Ray Absorption Spectroscopy of Infrared-Laser Induced Temperature Jumps in Liquid Water

A time-resolved x-ray absorption study of the structural dynamics of liquid water on a picosecond time scale is presented. We apply femtosecond mid-infrared pulses to resonantly excite the intramolecular O-H stretching band of liquid water and monitor the transient response in the oxygen K-edge absorption spectrum with picosecond x-ray pulses. In this way, structural changes in the hydrogen bon...

متن کامل

Femtosecond time-resolved X-ray absorption spectroscopy of anatase TiO2 nanoparticles using XFEL

The charge-carrier dynamics of anatase TiO2 nanoparticles in an aqueous solution were studied by femtosecond time-resolved X-ray absorption spectroscopy using an X-ray free electron laser in combination with a synchronized ultraviolet femtosecond laser (268 nm). Using an arrival time monitor for the X-ray pulses, we obtained a temporal resolution of 170 fs. The transient X-ray absorption spectr...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • Journal of Synchrotron Radiation

دوره 16  شماره 

صفحات  -

تاریخ انتشار 2009