引用本文:
Li Hua Liu, Wen Bin Li, Fei Gao, Tian Rui Huo. Adduct of magnesium tetraphenylporphyrin with aniline for colorimetric detection of SO2[J]. Chinese Chemical Letters,
2012, 23(2): 208-212.
doi:
10.1016/j.cclet.2011.10.018
Citation: Li Hua Liu, Wen Bin Li, Fei Gao, Tian Rui Huo. Adduct of magnesium tetraphenylporphyrin with aniline for colorimetric detection of SO2[J]. Chinese Chemical Letters, 2012, 23(2): 208-212. doi: 10.1016/j.cclet.2011.10.018
Citation: Li Hua Liu, Wen Bin Li, Fei Gao, Tian Rui Huo. Adduct of magnesium tetraphenylporphyrin with aniline for colorimetric detection of SO2[J]. Chinese Chemical Letters, 2012, 23(2): 208-212. doi: 10.1016/j.cclet.2011.10.018
Adduct of magnesium tetraphenylporphyrin with aniline for colorimetric detection of SO2
摘要:
Adduct of magnesium tetraphenyl porphyrin (MgTPP) with aniline for colorimetric detection of SO2 was investigated in CH2Cl2 by steady-state fluorescence and UV-vis absorption spectroscopic techniques. The UV-vis spectra showed that the increasing aniline concentrations resulted in red shift of 3 nm for MgTPP Soret absorption band. Once introduced, SO2 competes with MgTPP for aniline, which eventually leads to the release of MgTPP and changes in the solution color/absorption. The fluorescence spectra suggested that MgTPP interacted with aniline to form 1:1 molecular adducts, and showed that the binding of MgTPP with aniline with the binding constants of 1.58-1.64 is not only endothermal but entropy-driven with ΔH=1.622 kJ mol-1, ΔS=9.389 J mol-1 K-1, and ΔG=-1.585 kJ mol-1 at T=298.15 K.
English
Adduct of magnesium tetraphenylporphyrin with aniline for colorimetric detection of SO2
Abstract:
Adduct of magnesium tetraphenyl porphyrin (MgTPP) with aniline for colorimetric detection of SO2 was investigated in CH2Cl2 by steady-state fluorescence and UV-vis absorption spectroscopic techniques. The UV-vis spectra showed that the increasing aniline concentrations resulted in red shift of 3 nm for MgTPP Soret absorption band. Once introduced, SO2 competes with MgTPP for aniline, which eventually leads to the release of MgTPP and changes in the solution color/absorption. The fluorescence spectra suggested that MgTPP interacted with aniline to form 1:1 molecular adducts, and showed that the binding of MgTPP with aniline with the binding constants of 1.58-1.64 is not only endothermal but entropy-driven with ΔH=1.622 kJ mol-1, ΔS=9.389 J mol-1 K-1, and ΔG=-1.585 kJ mol-1 at T=298.15 K.
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Key words:
- Magnesium tetraphenyl porphyrin (MgTPP)
- / Aniline
- / Spectroscopy
- / Thermodynamic
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