Synthesis and characterization of two-photon chromophores based on a tetrasubstituted tetraethynylethylene scaffold.
A new series of model dye molecules composed of three multibranched analogues based on the tetrasubstituted tetraethynylethylene structural motif have been synthesized and experimentally shown to possess strong and widely dispersed two-photon absorption (2PA) in the near-IR region. It was found that the spectral position of the major 2PA band could be tuned by the electronic nature of the selected substitution units. The studied model fluorophores also exhibited fairly low photodegradation of their fluorescence intensity even under prolonged UV-light irradiation, which is beneficial for the development of fluorescence probes that are needed for long-term light exposure. Furthermore, representative chromophores were selected to demonstrate the power-control properties within the femtosecond and nanosecond time domains.
Photonic Materials Research Laboratory, Department of Chemistry, National Central University, 300 Jong-da Rd. 32001 Jhong-Li (Taiwan), Fax: (+886) 3-4227664. tclin@ncu.edu.tw.
Tzu-Chau
TC
Lin
Yi-You
YY
Liu
May-Hui
MH
Li
Che-Yu
CY
Liu
Sheng-Yang
SY
Tseng
Yu-Ting
YT
Wang
Ya-Hsin
YH
Tseng
Hui-Hsin
HH
Chu
Chih-Wei
CW
Luo
D065966:Absorption, Physicochemical; D053281:Enediynes / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000138:chemical synthesis* / Q000737:chemistry*; D015394:Molecular Structure; D017785:Photons; D011724:Pyridazines / Q000737:chemistry; D011725:Pyridines / Q000737:chemistry; D011810:Quinoxalines / Q000737:chemistry; D013050:Spectrometry, Fluorescence
D053281:Enediynes; D005456:Fluorescent Dyes; D011724:Pyridazines; D011725:Pyridines; D011810:Quinoxalines
Sonogashira reaction; absorption; chromophores; heterocycles; nonlinear optics