TY - JOUR
T1 - Linker Length-Dependent Electron-Injection Dynamics of Trimesitylporphyrins on SnO2 Films
AU - Lee, Shin Hee
AU - Regan, Kevin P.
AU - Hedström, Svante
AU - Matula, Adam J.
AU - Chaudhuri, Subhajyoti
AU - Crabtree, Robert H.
AU - Batista, Victor S.
AU - Schmuttenmaer, Charles A.
AU - Brudvig, Gary W.
N1 - Funding Information:
We thank the staff at Yale West Campus Analytical Core, Yale Chemical and Biophysical Instrumentation Center, and Yale WM Keck Foundation Biotechnology Resource Laboratory for their help with instrumentation. This work was supported by the U.S. Department of Energy, Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy Sciences, Office of Science (Grant DEFG02-07ER15909). Additional support was provided by a generous donation from the TomKat Charitable Trust. V.S.B. acknowledges computational time from NERSC and Yale HPC.
PY - 2017/10/19
Y1 - 2017/10/19
N2 - Electron-injection dynamics of dye-sensitized photoelectrochemical cells depend on the length of the linker connecting the molecular photosensitizer to the metal oxide electron acceptor. However, systematic studies of the effect of chromophore-oxide distance are scarce. Here we present the synthesis, characterization, spectroscopy, and computational modeling of electron-injection dynamics from free-base trimesitylporphyrins with varying linker lengths into tin(IV) oxide (SnO2). In each system, the porphyrin core and metal oxide film remain the same while only the linker binding the porphyrin to the carboxylate anchor group is varied. A length range spanning 8.5-17.2 Å is studied by employing phenylene, biphenylene, terphenylene, and benzanilide groups as the linker. We find a clear correlation between linker length and injection rates, providing insights that will be exploited in the optimization of dye-sensitized photoelectrochemical cells. (Chemical Equation Presented).
AB - Electron-injection dynamics of dye-sensitized photoelectrochemical cells depend on the length of the linker connecting the molecular photosensitizer to the metal oxide electron acceptor. However, systematic studies of the effect of chromophore-oxide distance are scarce. Here we present the synthesis, characterization, spectroscopy, and computational modeling of electron-injection dynamics from free-base trimesitylporphyrins with varying linker lengths into tin(IV) oxide (SnO2). In each system, the porphyrin core and metal oxide film remain the same while only the linker binding the porphyrin to the carboxylate anchor group is varied. A length range spanning 8.5-17.2 Å is studied by employing phenylene, biphenylene, terphenylene, and benzanilide groups as the linker. We find a clear correlation between linker length and injection rates, providing insights that will be exploited in the optimization of dye-sensitized photoelectrochemical cells. (Chemical Equation Presented).
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U2 - 10.1021/acs.jpcc.7b07855
DO - 10.1021/acs.jpcc.7b07855
M3 - Article
AN - SCOPUS:85031933003
VL - 121
SP - 22690
EP - 22699
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 41
ER -