| Spectroscopic study on the photophysical properties of chlorine substituted tetraphenylporphyrin-histidine and its zinc(Ⅱ)complexes |
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| 作者姓名： | ZHANGHuijuan FENGJuan AIXicheng ZHANGXingkang YUZhongheng ZHANGJianping |
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| 作者单位： | StateKeyLaboratoryforStructuralChemistryofUnstableandStableSpecies;CenterofMolecularScience,InstituteofChemistry,ChineseAcademvofSciences.Beiiing100080.China |
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| 摘 要： | The photophysical properties of ortho-CI,meta-CI and para-CI substituted tetraphenylporphy-rin-histidine and their zinc (II) complexes have been studied by means of steady-state absorption and fluo-rescence spectroscopies, as well as time-resolved fluo-rescence spectroscopy. For the cases of both free-base and zinc complexes, it was found that the ortho-chlorine substitution onto the phenyl rings significantly altered the fluorescence quantum yield, thefluorescence lifetime and the ratio between radiative and nonradiative deactivation rates of the porphyrin chromophore, i.e. the photophysical parameters were quite different from those of meta- and para-substituted compounds. On the other hand, however, the introduction of covalently-linked histidine did not exert much effects on the photophysical behavior of the porphyrin chromophore. The results are interpreted interms of the steric effect and the heavy-atom effect from the chlorine atoms substituted onto the phenyl rings.
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| 关 键 词： | 氯取代四苯基卟啉组氨酸 锌配合物 光谱研究 光物理性质 |
| 收稿时间： | 2003-01-08 |
| 修稿时间： | 2003-04-15 |
Spectroscopic study on the photophysical properties of chlorine substituted tetraphenylporphyrin-histidine and its zinc (II) complexes |
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| ZHANGHuijuan FENGJuan AIXicheng ZHANGXingkang YUZhongheng ZHANGJianping.Spectroscopic study on the photophysical properties of chlorine substituted tetraphenylporphyrin-histidine and its zinc (II) complexes[J].Chinese Science Bulletin,2003,48(17):1794-1799. |
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| Authors: | Huijuan?Zhang Juan?Feng Xicheng?Ai Xingkang?Zhang Zhongheng?Yu Email author" target="_blank">Jianping?ZhangEmail author |
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| Institution: | ZHANG Huijuan, FENG Juan, AI Xicheng, ZHANG Xingkang, YU Zhongheng & ZHANG Jianping State Key Laboratory for Structural Chemistry of Unstable and StableSpecies; Center of Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | The photophysical properties ofortho- CI,meta-CI andpara-CI substituted tetraphenylporphyrin-histidine and their zinc (II) complexes have been studied by means of steady-state absorption
and fluorescence spectroscopies, as well as time-resolved fluorescence spectroscopy. For the cases of both free-base and zinc
complexes, it was found that theortho-chlorine substitution onto the phenyl rings significantly altered the fluorescence quantum yield, the fluorescence lifetime and the
ratio between radiative and nonradiative deactivation rates of the porphyrin chromophore, i.e. the photophysical parameters
were quite different from those ofmeta- andpara-substituted compounds. On the other hand, however, the introduction of covalently-linked histidine did not exert much effects
on the photophysical behavior of the porphyrin chromophore. The results are interpreted in terms of the steric effect and
the heavy-atom effect from the chlorine atoms substituted onto the phenyl rings. |
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| Keywords: | porphyrin-histidine zinc porphyrin chlorine substitu-tion fluorescence spectroscopy DOI10 1360/03wb0003 |
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