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Excitonic Coupling between B and Q Transitions in Porphyrin Aggregates
- Source :
- Chinese Physics Letters. 26:083201
- Publication Year :
- 2009
- Publisher :
- IOP Publishing, 2009.
-
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.
Details
- ISSN :
- 17413540 and 0256307X
- Volume :
- 26
- Database :
- OpenAIRE
- Journal :
- Chinese Physics Letters
- Accession number :
- edsair.doi...........4a1780e62bc46a39b16bb3f2bca26a19