XTA (X-ray transient absorption) spectroscopy has been used to probe the transient structure during interfacial electron transfer between photo-sensitizer and semiconductor nanocrystals. Two sample systems have been studied, Ru(dcbpy)2(NCS)2 and Os(dcbpy)2(CN)2 (dcbpy = bis(4,4′-dicarboxy-2,2′-bipyridyl) adsorbed to TiO2 nanoparticle surface. The photoexcited Ruthenium or Osmium polypyridyl photosensitizers inject electrons to conduction band of TiO2 nanoparticle, resulting in interfacial charge-transfer state. Both the electronic configuration and molecular structure changes of Ruthenium and Osmium complexes in the charge-separated state have been observed.
© 2012 Optical Society of AmericaPDF Article
More Like This
LM4F.4 Laser Science (LS) 2017
Chinmoy Biswas, Krishnakanth Naga Katturi, Naresh Duvva, Lingamallu Giribabu, Venugopal Rao Soma, and Sai Santosh Kumar Raavi
M4A.32 International Conference on Ultrafast Phenomena (UP) 2020
Benjamin I. Poulter, Elisa Biasin, Chelsea Liekhus-Schmaltz, Christopher Arrell, Sven Augustin, Claudio Cirelli, Amy Cordones-Hahn, Phillip Johnson, Gregor Knopp, Christopher Milne, Roberto Alonso Mori, Dmitry Ozerov, Marco Reinhard, Jason W. Sandwisch, Dimosthenis Sokaras, Ivan Usov, Robert B. Weakly, Niranjan Govind, Robert W. Schoenlein, and Munira Khalil
Th1A.4 International Conference on Ultrafast Phenomena (UP) 2020