TY - JOUR
T1 - Light-induced charge separation in ruthenium based triads - New variations on an old theme
AU - Falkenström, Magnus
AU - Johansson, Olof
AU - Hammarström, Leif
N1 - Funding Information:
This work was performed within the collaboration of The Swedish Consortium for Artificial Photosynthesis. We are grateful to all coworkers and collaboration partners who have taken part in the work described here, and whose names can be found in the references. For the work of the first part of this review in particular we gratefully acknowledge our former collaboration with Professor Emeritus Björn Åkermark. We acknowledge financial support from The Swedish Energy Agency, The Swedish Research Council, The Swedish Foundation for Strategic Research and the European Commission (NEST-STRP “SOLAR-H”, Contract No. 516510). L.H. gratefully acknowledges a Research Fellow position from the Royal Swedish Academy of Sciences.
PY - 2007/2/15
Y1 - 2007/2/15
N2 - Success with artificial photosynthesis requires control of the photoinduced electron transfer reactions leading to charge-separated states. In this review, some new ideas to optimize such charge-separated states in ruthenium(II) polypyridyl based three-component systems with respect to: (1) long lifetimes and (2) ability to store sufficient energy for catalytic water splitting, are presented. To form long-lived charge-separated states, a manganese complex as electron donor and potential catalyst for water oxidation has been used. The recombination reaction is unusually slow because it occurs deep down in the Marcus normal region as a consequence of the large bond reorganization following the manganese oxidation. For the creation of high energy charge-separated states, a strategy using bichromophoric systems is presented. By consecutive excitations of the two chromophores, the formation of charge-separated states that lie higher in energy than either of the two excited states could in theory be achieved, the first results of which will be discussed in this review.
AB - Success with artificial photosynthesis requires control of the photoinduced electron transfer reactions leading to charge-separated states. In this review, some new ideas to optimize such charge-separated states in ruthenium(II) polypyridyl based three-component systems with respect to: (1) long lifetimes and (2) ability to store sufficient energy for catalytic water splitting, are presented. To form long-lived charge-separated states, a manganese complex as electron donor and potential catalyst for water oxidation has been used. The recombination reaction is unusually slow because it occurs deep down in the Marcus normal region as a consequence of the large bond reorganization following the manganese oxidation. For the creation of high energy charge-separated states, a strategy using bichromophoric systems is presented. By consecutive excitations of the two chromophores, the formation of charge-separated states that lie higher in energy than either of the two excited states could in theory be achieved, the first results of which will be discussed in this review.
KW - Artificial photosynthesis
KW - Electron transfer
KW - Light induced charge separation
KW - Manganese
KW - Ruthenium
UR - http://www.scopus.com/inward/record.url?scp=33846264108&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33846264108&partnerID=8YFLogxK
U2 - 10.1016/j.ica.2006.06.046
DO - 10.1016/j.ica.2006.06.046
M3 - Review article
AN - SCOPUS:33846264108
VL - 360
SP - 741
EP - 750
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
SN - 0020-1693
IS - 3
ER -