Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7690634 | Vibrational Spectroscopy | 2018 | 8 Pages |
Abstract
Resonance Raman spectra of protonated meso-tetraphenylporphine (TPP) dimers measured earlier in aqueous solutions have been interpreted in terms of polaronic exciton theory. Consideration of the incident photon interaction with H3O+ producing polaronic exciton shows up spin-orbit interaction depending (βqâ¯=â¯3.741657387) and almost non-depending (βâ¯=â¯1.19100654) on quaternary molecule coordination in the water clusters. Both β parameters that take into consideration proton and electron spin orientations have been involved in major relations derived under the development of polaronic exciton theory. Theoretically estimated energy gap between the levels with different proton spin orientations, i.e. eââpâe and eââpâe in the OHδ+...O moiety is found to be 40.766â¯cmâ1. Experimental energy gap 25.5â¯Â±â¯1.3â¯cmâ1 averaged for several doublets in the Raman spectrum with λex â¯=â¯441.6â¯nm is consistent with the theoretical 25.19â¯cmâ1 obtained using golden section as a denominator. It appears that golden section governs the fine structure under the proton sharing in the OH+...O moiety of the water cluster embedded between TPP units of the dimers.
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Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Alexander V. Udal'tsov,