| ATOMIC AND MOLECULAR PHYSICS |
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Excitonic Coupling between B and Q Transitions in Porphyrin Aggregates |
| ZHOU Mi, JIANG Yong-Heng, LU Guo-Hui, GAO Shu-Qin, LI Zuo-Wei |
| State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130023 |
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| Cite this article: |
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ZHOU Mi, JIANG Yong-Heng, LU Guo-Hui et al 2009 Chin. Phys. Lett. 26 083201 |
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Abstract The properties of meso-tetraphenylporphine (TPP) aggregates formed in acidic aqueous-organic solutions are investigated by UV-vis spectroscopy. According to the absorption spectra, the Q band absorption of the aggregated TPP shows red shift and intensity enhancement, and a model that includes the participation of water molecules in a porphyrin aggregation complex is proposed, then a qualitative explanation based on Gouterman's excition coupling theory is presented. Calculations including eigenenergies, eigenstates and the transition dipole strength of the coupled states are carried out.
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| Keywords:
32.30.Jc
34.80.Gs
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Received: 18 December 2008
Published: 30 July 2009
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| PACS: |
32.30.Jc
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(Visible and ultraviolet spectra)
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34.80.Gs
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(Molecular excitation and ionization)
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