TY - JOUR
T1 - Self-assembly of a chlorophyll-based cyclic trimer
T2 - Structure and intramolecular energy transfer
AU - Gunderson, Victoria L.
AU - Wasielewski, Michael R.
PY - 2013/1/29
Y1 - 2013/1/29
N2 - Small- and wide-angle X-ray scattering (SAXS/WAXS) and DOSY 1H NMR reveal that a zinc methyl pyrochlorophyllide a (Chl) derivative with a 3-pyridyl ligand at the Chl 20-position self-assembles in toluene solution into a cyclic trimer having a radius of 8.2 ± 0.1 Å. Femtosecond transient absorption spectroscopy shows that singlet-singlet annihilation occurs within the cyclic trimer as a result of energy transfer between the Chls that occurs with an (11 ± 1 ps)-1 rate constant, which agrees with the predictions of Förster theory, even though the Chl-Chl distances are comparable to the length of the Chl transition dipole.
AB - Small- and wide-angle X-ray scattering (SAXS/WAXS) and DOSY 1H NMR reveal that a zinc methyl pyrochlorophyllide a (Chl) derivative with a 3-pyridyl ligand at the Chl 20-position self-assembles in toluene solution into a cyclic trimer having a radius of 8.2 ± 0.1 Å. Femtosecond transient absorption spectroscopy shows that singlet-singlet annihilation occurs within the cyclic trimer as a result of energy transfer between the Chls that occurs with an (11 ± 1 ps)-1 rate constant, which agrees with the predictions of Förster theory, even though the Chl-Chl distances are comparable to the length of the Chl transition dipole.
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U2 - 10.1016/j.cplett.2012.12.025
DO - 10.1016/j.cplett.2012.12.025
M3 - Article
AN - SCOPUS:84872303057
VL - 556
SP - 303
EP - 307
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
ER -