Study on the inclusion behavior between meso-tetrakis[4-(3-pyridiniumpropoxy)phenyl]prophyrin tetrakisbromide and beta-cyclodextrin derivatives in aqueous solution |
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| Authors: | Qiu Wen-Ge Li Zong-Feng Bai Guang-Mei Meng Sheng-Nan Dai Hong-Xing He Hong |
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| Affiliation: | Department of Chemical Science and Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100022, PR China. qiuwenge@bjut.edu.cn |
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| Abstract: | The interaction of a cationic water-soluble porphyrin, 5,10,15,20-tetrakis[4-(3-pyridiniumpropoxy)phenyl]prophyrin tetrakisbromide (TPPOC3Py), with beta-CD and HP-beta-CD in aqueous solution has been studied by UV-vis, 1H NMR, 2D-NOESY and MALDI-TOF MS, and it reveals that a stable 1:1 inclusion complex between TPPOC3Py and HP-beta-CD or beta-CD has formed, in which one of the meso substituents of porphyrin ring has deeply penetrated through the cavity of HP-beta-CD from secondary face. The inclusion constants of the complexes of TPPOC3Py-beta-CD and TPPOC3Py-HP-beta-CD are (1.6+/-0.2)x10(3) M-1 and (8.9+/-0.4)x10(4) M-1, respectively. |
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| Keywords: | Cyclodextrin Meso-tetrakis[4-(3-pyridiniumpropoxy)phenyl]prophyrin (TPPOC3Py) Inclusion complex Supramolecular assembly |
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