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Fluorescence upconversion properties of a chiral polybinaphthyl induced by two‐photon absorption
Author(s) -
Zeng Yi,
Wang Changshun,
Huang Xiaobo,
Cheng Yixiang
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.35312
Subject(s) - excited state , fluorescence , photon upconversion , materials science , absorption (acoustics) , excitation , photochemistry , analytical chemistry (journal) , optics , optoelectronics , atomic physics , chemistry , luminescence , physics , quantum mechanics , chromatography , composite material
Abstract The fluorescence properties of a chiral polymer based on optically active polybinaphthyls were studied in tetrahydrofuran solution. One‐photon excited fluorescence of the polymer was located in the range of ∼ 596 nm and the corresponding lifetime was ∼ 4.38 ns. From the excitation spectra and emission spectra excited at 800 nm, the upconversion fluorescence emission was observed. When excited by using 800 nm fs laser pulses with different input irradiances, the peak fluorescence intensity of the solution provides square dependence with the input irradiance power, giving an evidence for two‐photon excited fluorescence. Furthermore, open aperture Z‐scan measurements were performed at different irradiation intensities to confirm two‐photon absorption property of the solution at 800 nm excitation. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012