Molecular Structural Dynamics of Photoactive Transition Metal Complexes in Solar Energy Conversion Studied by Ultrafast Optical Spectroscopy and LITR-XAS

2007 ◽  
Author(s):  
L. X. Chen ◽  
G. B. Shaw ◽  
E. C. Wasinger ◽  
X. Zhang ◽  
K. Attenkofer ◽  
...  
Keyword(s):  
Transition Metal ◽  
Solar Energy ◽  
Metal Complexes ◽  
Energy Conversion ◽  
Optical Spectroscopy ◽  
Transition Metal Complexes ◽  
Structural Dynamics ◽  
Solar Energy Conversion ◽  
Ultrafast Optical ◽  
Ultrafast Optical Spectroscopy

scholarly journals Design of BODIPY dyes as triplet photosensitizers: electronic properties tailored for solar energy conversion, photoredox catalysis and photodynamic therapy

2021 ◽  
Author(s):  
Elena Bassan ◽  
Andrea Gualandi ◽  
Pier Giorgio Cozzi ◽  
Paola Ceroni
Keyword(s):  
Heavy Metal ◽  
Photodynamic Therapy ◽  
Solar Energy ◽  
Metal Complexes ◽  
Energy Conversion ◽  
Electronic Properties ◽  
Solar Energy Conversion ◽  
Photoredox Catalysis

BODIPYs offer a versatile platform to build organic triplet photosensitisers for PDT, TTA upconversion and photocatalysis. Tuning their properties provides the opportunity of replacing heavy-metal complexes and can lead to improved sustainability.

scholarly journals Watching the dynamics of electrons and atoms at work in solar energy conversion

2015 ◽  
Vol 185 ◽  
pp. 51-68 ◽  
Author(s):  
S. E. Canton ◽  
X. Zhang ◽  
Y. Liu ◽  
J. Zhang ◽  
M. Pápai ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Solar Energy ◽  
Energy Conversion ◽  
Solar Energy Conversion ◽  
Photochemical Reactions ◽  
Atomic Scale ◽  
Intramolecular Electron Transfer ◽  
X Ray ◽  
Ultrafast Optical ◽  
Quantum Chemistry Calculations

The photochemical reactions performed by transition metal complexes have been proposed as viable routes towards solar energy conversion and storage into other forms that can be conveniently used in our everyday applications. In order to develop efficient materials, it is necessary to identify, characterize and optimize the elementary steps of the entire process on the atomic scale. To this end, we have studied the photoinduced electronic and structural dynamics in two heterobimetallic ruthenium–cobalt dyads, which belong to the large family of donor–bridge–acceptor systems. Using a combination of ultrafast optical and X-ray absorption spectroscopies, we can clock the light-driven electron transfer processes with element and spin sensitivity. In addition, the changes in local structure around the two metal centers are monitored. These experiments show that the nature of the connecting bridge is decisive for controlling the forward and the backward electron transfer rates, a result supported by quantum chemistry calculations. More generally, this work illustrates how ultrafast optical and X-ray techniques can disentangle the influence of spin, electronic and nuclear factors on the intramolecular electron transfer process. Finally, some implications for further improving the design of bridged sensitizer-catalysts utilizing the presented methodology are outlined.

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