3 years ago

Probing Transient Photoinduced Charge Transfer in Prussian Blue Analogues with Time-Resolved XANES and Optical Spectroscopy

Probing Transient Photoinduced Charge Transfer in Prussian Blue Analogues with Time-Resolved XANES and Optical Spectroscopy
Shin-ichi Ohkoshi, Martin N. Pedersen, Serhane Zerdane, Kosuke Nakagawa, Roman Bertoni, Marco Cammarata, Lodovico Balducci, Eric Collet, Sandra Mazerat, Talal Mallah, Michael Wulff, Hiroko Tokoro, Laure Catala
We studied the transient electron-transfer process in CsCoFe and RbMnFe Prussian Blue analogues by time-resolved X-ray absorption near-edge structure (XANES) and by time-resolved optical spectroscopy. We performed time-resolved studies on CsCoFe nanocrystals dispersed in solution. The XANES results obtained at room temperature clearly evidence CoIII(low spin)FeIICoII(high spin)FeIII electron transfer between the metal centers through opposite spectral shifts at the Fe and Co edges. We also studied the MnIII(low spin)FeIIMnII(high spin)FeIII process in an RbMnFe powder sample at thermal equilibrium and under laser excitation. Optical spectroscopy revealed that the process occurs on the picosecond timescale, as already reported by Raman spectroscopy, and that the lifetime of the photoinduced charge-transfer states is in the 1–10 µs range, depending on the sample and temperature.We studied the transient electron-transfer process induced by a femtosecond laser pulse in nanocrystals of CsCoFe and RbMnFe Prussian Blue analogues by time-resolved X-ray absorption near-edge structure and time-resolved optical spectroscopy. The results clearly evidence ultrafast CoIII(low spin)FeIICoII(high spin)FeIII and MnIII(low spin)FeIIMnII(high spin)FeIII electron-transfer processes.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/ejic.201700657

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.