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Photophysical Properties of Novel Phthalocyanines: Multi Emission by Excited at Short Wavelength
Asian Journal of Chemistry,
Vol. 22 No. 1 (2010): Vol 22 Issue 1, 2010
Abstract
Two novel phthalocyanines: tetra-azobenzene substituted zinc
phthalocyanine ZnPc.(Oazo)4 and polymeric ytterbium phthalocyanine
carboxyl (YbPPc.COOH) have been synthesized and their electronic
adsorption and emission spectra have been investigated by spectrometric
method. Both of the synthesized compounds can emit two fluorescent
peaks when excited at short wavelength (below 400 nm) and one peak
when excited at long wavelength (higher than 600 nm) as well. For
YbPPc.COOH, in pH 7.4 buffer solution, when excited at 330 nm, beside
normal fluorescent peak at 720 nm, a second emission peak appeared at
455 nm. The fluorescence quantum yield of two emission was 0.35
(720 nm em, 635 nm ex) and 0.33 (455 nm em, 330 nm ex), respectively.
This equivalent multi-emission phenomenon by different excited wavelength
indicates good applied potential in photodynamic diagnose and
fluorescence imagination.
phthalocyanine ZnPc.(Oazo)4 and polymeric ytterbium phthalocyanine
carboxyl (YbPPc.COOH) have been synthesized and their electronic
adsorption and emission spectra have been investigated by spectrometric
method. Both of the synthesized compounds can emit two fluorescent
peaks when excited at short wavelength (below 400 nm) and one peak
when excited at long wavelength (higher than 600 nm) as well. For
YbPPc.COOH, in pH 7.4 buffer solution, when excited at 330 nm, beside
normal fluorescent peak at 720 nm, a second emission peak appeared at
455 nm. The fluorescence quantum yield of two emission was 0.35
(720 nm em, 635 nm ex) and 0.33 (455 nm em, 330 nm ex), respectively.
This equivalent multi-emission phenomenon by different excited wavelength
indicates good applied potential in photodynamic diagnose and
fluorescence imagination.
Keywords
Phthalocyanine
Fluorescence
Photophysical.
ZHAO, P., PARK, Y.-S., & WOO*, J.-W. (2024). Photophysical Properties of Novel Phthalocyanines: Multi Emission by Excited at Short Wavelength. Asian Journal of Chemistry, 22(1), 597–602. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/16683
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