Effect of polyene chain length on the parameters of intra- and intermolecular interactions between all-trans diphenyl polyenes

Analysis of the parameters of Franck–Condon and Herzberg–Teller interactions the molecules of substituted diphenylbutadienes

“…The obtained spectra confirm the validity of our findings, in addition the possibility of prediction them via vibronic parameters and select the type of substituent values -for the donor or acceptor interaction per molecule [12,13].…”

“…The relative intensities of bands in the spectra of were calculated by the procedure described in [7,8]. Based on the modern theory of molecular spectra in the adiabatic approximation ,which makes it possible to simultaneously take into account the influence of the Franck-Condon and Herzberg-Teller interactions on the shape of optical bands [10], we calculated the parameters а and α (of the FC and HT interactions, respectively) for each vibronic transition of the studied molecules.In this study, the basic oscillations for substituted compounds were correlated with the interpretation of similar value 1,4-diphenylbutadiene, which spectral properties have been studied previously [11][12][13]. We shown to considered acceptors and donors, and besides the…”

“…In this study, the basic oscillations for substituted compounds were correlated with the interpretation of similar value 1,4-diphenylbutadiene, which spectral properties have been studied previously [11][12][13]. We shown to considered acceptors and donors, and besides the choice of the substituent in the aromatic ring was conditioned by the intention to show the obvious symmetry breaking, as well as variation for symmetry recovery.…”

Analysis of vibronic interactions in the molecules of cross-conjugated ketones

“…In this study, the basic osciliation for ketones with general formula R1,2=Ph-CO-R1 (where R1o(CH=CH)2-N(CH3)2, R2oCH3-NC4H3-CH, Pho(HOC6H6)) were correlated with the interpretation of similar value and substituent frequencies 1,4-diphenylbutadiene with the substituent on the ring N(CH3)2 and NO2, respectively (after -DFB3), which spectral properties have been studied previously [8][9][10]. We shown how band intensities ketones characterizing polyene bridge and the phenyl ring are changes.…”

“…Therefore, it was interest to produce the comparative analysis of the spectral properties of ketones and diphenylpolyenes at the same time, and quantification of the contribution of intramolecular interactions in the organization of the fine-structure spectra of these molecules. In order to realize such kind if investigations the different methods of selective laser spectroscopy can be used [2,3], in particular vibrational analysis of conjugated absorption and luminescence spectra [4][5][6][7].In this study, the basic osciliation for ketones with general formula R1,2=Ph-CO-R1 (where R1o(CH=CH)2-N(CH3)2, R2oCH3-NC4H3-CH, Pho(HOC6H6)) were correlated with the interpretation of similar value and substituent frequencies 1,4-diphenylbutadiene with the substituent on the ring N(CH3)2 and NO2, respectively (after -DFB3), which spectral properties have been studied previously [8][9][10]. We shown how band intensities ketones characterizing polyene bridge and the phenyl ring are changes.…”