活性金胶体溶液中Hoechst 33258染料双光子和三光子吸收的表面等离子体增强
Surface plasmon enhancement of two- and three-photon absorption of Hoechst 33 258 dye in activated gold colloid solution.
作者信息
Cohanoschi Ion, Hernández Florencio E
机构信息
Department of Chemistry and School of Optics/CREOL/FPCE, University of Central Florida, P.O. Box 162366, Orlando, Florida 32816-2366, USA.
出版信息
J Phys Chem B. 2005 Aug 4;109(30):14506-12. doi: 10.1021/jp0508958.
Herein we present experimental evidence of the strong surface plasmon enhancement of two- and three-photon absorption of Hoechst 33 258 (2'-(4-hydrophenyl)-5-(4-methyl-1-piperazinyl)-2,5'-bis(1H-benzimidazole)) pentahydrate in an aqueous solution containing activated gold colloid. The 480-fold enhancement in two-photon absorption and 30-fold in three-photon absorption are predominantly attributed to the electric-field enhancement via surface plasmon resonance. The greater enhancement observed in two-photon absorption is due to the characteristic two- and three-photon absorption cross-sections of the dye.
在此，我们展示了在含有活化金胶体的水溶液中，Hoechst 33258（2'-(4-羟苯基)-5-(4-甲基-1-哌嗪基)-2,5'-双(1H-苯并咪唑)）五水合物的双光子和三光子吸收的强表面等离子体增强的实验证据。双光子吸收增强480倍，三光子吸收增强30倍，这主要归因于通过表面等离子体共振的电场增强。在双光子吸收中观察到的更大增强是由于染料的特征性双光子和三光子吸收截面。
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