TY - JOUR
T1 - Exploring the Förster limit in a small FRET pair
AU - Khan, Yaser R.
AU - Dykstra, Tieneke E.
AU - Scholes, Gregory D.
N1 - Funding Information:
The Natural Sciences and Engineering Research Council of Canada are gratefully acknowledged for support of this research. This work was made possible by the facilities of the Shared Hierarchical Academic Research Computing Network (SHARCNET: www.sharcnet.ca ). GDS acknowledges the support of an NSERC E.W.R. Steacie Memorial Fellowship.
PY - 2008/8/20
Y1 - 2008/8/20
N2 - The accuracy of Förster theory for measuring short donor-acceptor distances in a small chromophore pair is examined. Small chromophores are much better suited for measuring short distances relative to large chormophores. Nonetheless, it is found that the Förster expression introduces errors for distances below 20 Å, overestimating for some orientations and underestimating for others. Fortuitous cancellation due to orientation disorder in experimental investigations may result in better agreement with Förster rate. Not only the size of the molecule, but more significantly, the spread of transition dipole density is found to be a limiting factor.
AB - The accuracy of Förster theory for measuring short donor-acceptor distances in a small chromophore pair is examined. Small chromophores are much better suited for measuring short distances relative to large chormophores. Nonetheless, it is found that the Förster expression introduces errors for distances below 20 Å, overestimating for some orientations and underestimating for others. Fortuitous cancellation due to orientation disorder in experimental investigations may result in better agreement with Förster rate. Not only the size of the molecule, but more significantly, the spread of transition dipole density is found to be a limiting factor.
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U2 - 10.1016/j.cplett.2008.07.023
DO - 10.1016/j.cplett.2008.07.023
M3 - Article
AN - SCOPUS:48749094172
SN - 0009-2614
VL - 461
SP - 305
EP - 309
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 4-6
ER -