Abstract
It is found that in absorption spectra of porphyrin dimers linked by a flexible bridge, the shape of the Soret band strongly depends on the solvent, which is explained by differences in the conformation composition of the dimers studied. The conformation composition was analyzed with the deconvolution method, which made it possible to resolve and sharpen all components of the complex contour, of the Soret band. Using different solvents, we studied changes in the behavior of every elementary band with a model of exciton (dipole-dipole) interaction and found that in all the solutions this dimer occurred in the form of face-to-face and side-to-side conformers. The relative content of face-to-face conformation markedly increased with the polarity of the solvent.
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Institute of Molecular and Atomic Physics, Academy of Sciences of Belarus, 70, F. Skorina Ave., Minsk, 220072, Belarus. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 6, pp. 716–723, November–December, 1997.
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Terekhov, S.N., Meleshchenko, L.A., Shulga, A.M. et al. Analysis of the conformation composition of ethane-bisporphyrin solutions from absorption spectra in the region of the soret band. J Appl Spectrosc 64, 726–733 (1997). https://doi.org/10.1007/BF02678852
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DOI: https://doi.org/10.1007/BF02678852