Abstract
The ultrafast excited state decay rates for indenofluorene and fluorenofluorene derivatives as measured by transient absorption spectroscopy are reported. The excited state lifetimes of the molecules were extremely short (ca. 9-12 ps) and are a result of the p-xylylene motif in indenofluorenes and the corresponding expanded 2,6-naphthoquinonedimethide in fluorenofluorene. Quantum chemical calculations indicate that the fast relaxation to the ground state results from a potential energy surface crossing between the S0 and S1 states. This process in turn provides an efficient route for excited state deactivation and explains why this class of quinoidal molecules is non-emissive.
| Original language | English |
|---|---|
| Pages (from-to) | 137-141 |
| Number of pages | 5 |
| Journal | Chemical Physics Letters |
| Volume | 616-617 |
| DOIs | |
| Publication status | Published - Nov 25 2014 |
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ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Physics and Astronomy(all)
Cite this
Unusually short excited state lifetimes of indenofluorene and fluorenofluorene derivatives result from a conical intersection. / Rose, Bradley D.; Shoer, Leah E.; Wasielewski, Michael R; Haley, Michael M.
In: Chemical Physics Letters, Vol. 616-617, 25.11.2014, p. 137-141.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Unusually short excited state lifetimes of indenofluorene and fluorenofluorene derivatives result from a conical intersection
AU - Rose, Bradley D.
AU - Shoer, Leah E.
AU - Wasielewski, Michael R
AU - Haley, Michael M.
PY - 2014/11/25
Y1 - 2014/11/25
N2 - The ultrafast excited state decay rates for indenofluorene and fluorenofluorene derivatives as measured by transient absorption spectroscopy are reported. The excited state lifetimes of the molecules were extremely short (ca. 9-12 ps) and are a result of the p-xylylene motif in indenofluorenes and the corresponding expanded 2,6-naphthoquinonedimethide in fluorenofluorene. Quantum chemical calculations indicate that the fast relaxation to the ground state results from a potential energy surface crossing between the S0 and S1 states. This process in turn provides an efficient route for excited state deactivation and explains why this class of quinoidal molecules is non-emissive.
AB - The ultrafast excited state decay rates for indenofluorene and fluorenofluorene derivatives as measured by transient absorption spectroscopy are reported. The excited state lifetimes of the molecules were extremely short (ca. 9-12 ps) and are a result of the p-xylylene motif in indenofluorenes and the corresponding expanded 2,6-naphthoquinonedimethide in fluorenofluorene. Quantum chemical calculations indicate that the fast relaxation to the ground state results from a potential energy surface crossing between the S0 and S1 states. This process in turn provides an efficient route for excited state deactivation and explains why this class of quinoidal molecules is non-emissive.
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UR - http://www.scopus.com/inward/citedby.url?scp=84908506563&partnerID=8YFLogxK
U2 - 10.1016/j.cplett.2014.10.031
DO - 10.1016/j.cplett.2014.10.031
M3 - Article
VL - 616-617
SP - 137
EP - 141
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
ER -