TY - JOUR
T1 - Three-photon absorption enhancement in a symmetrical charge transfer fluorene derivative
AU - Hernández, Florencio E.
AU - Belfield, Kevin D.
AU - Cohanoschi, Ion
N1 - Funding Information:
This research was supported by start up funds provided to FEH by the Department of Chemistry, University of Central Florida. KDB would like to acknowledge the National Science Foundation (ECS-9970078, ECS-0217932, DMR-9975773), the Research Corporation, and the donors of The Petroleum Research Fund of the American Chemical Society for partial support of this work.
PY - 2004/6/11
Y1 - 2004/6/11
N2 - In this letter we report the three-photon absorption-induced upconversion fluorescence emission and the three-photon absorption cross-section of two fluorene derivatives with D-π-D (9,9-didecyl-2,7-bis-(N,N-diphenylamino) fluorene) and D-π-A ((7-benzothiazol-2-yl-9,9-didecylfluoren-2-yl) diphenylamine) structural motifs. The three-photon absorption cross-section of the D-π-D analog (σ3′=82×10 -78 cm6s2photon-2) is 2.2 times greater than that of its D-π-A counterpart (σ3 ′=37×10-78 cm6s 2photon-2), showing that symmetric charge transfer enhances 3PA. The three-photon-excitation of these two compounds in hexane solution (9.8×10-3 M) was accomplished with a tunable OPG pumped by picosecond laser pulses. The three-photon absorption coefficients were measured using an open aperture Z-scan technique.
AB - In this letter we report the three-photon absorption-induced upconversion fluorescence emission and the three-photon absorption cross-section of two fluorene derivatives with D-π-D (9,9-didecyl-2,7-bis-(N,N-diphenylamino) fluorene) and D-π-A ((7-benzothiazol-2-yl-9,9-didecylfluoren-2-yl) diphenylamine) structural motifs. The three-photon absorption cross-section of the D-π-D analog (σ3′=82×10 -78 cm6s2photon-2) is 2.2 times greater than that of its D-π-A counterpart (σ3 ′=37×10-78 cm6s 2photon-2), showing that symmetric charge transfer enhances 3PA. The three-photon-excitation of these two compounds in hexane solution (9.8×10-3 M) was accomplished with a tunable OPG pumped by picosecond laser pulses. The three-photon absorption coefficients were measured using an open aperture Z-scan technique.
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U2 - 10.1016/j.cplett.2004.04.051
DO - 10.1016/j.cplett.2004.04.051
M3 - Article
AN - SCOPUS:2542491334
SN - 0009-2614
VL - 391
SP - 22
EP - 26
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 1-3
ER -