On Saltiel's isopolarizability approach and its applicability to diphenylpolyenes

Catalán, Javier

doi:10.1016/j.cplett.2015.06.043

Cited by 6 publications

References 14 publications

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On the dimerization of unsubstituted α,ω-diphenylpolyenes at low concentrations in inert solvents

Catalán

2016

J. Phys. Org. Chem.

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As shown here, unsubstituted diphenylpolyenes such as trans‐stilbene, 1,4‐diphenyl‐1,3‐butadiene, 1,6‐diphenyl‐1,3,5‐hexatriene (DPH), and 1,8‐diphenyl‐1,3,5,7‐octatetraene (DPO) dimerize in appropriate inert solvents such as 2‐methylbutane (2MB) and methylcyclohexane (MeCyh). The UV–Vis absorption spectra for these dimeric associations partially confirm the assignations of Whitten and coworkers based on multilayered sets of polyene derivatives constructed by using the Langmuir–Blodgett technique. As also shown here, DPH and DPO dimeric associates in 2MB are undetectable by UV–Vis absorption spectroscopy, and so are those formed in MeCyh‐rich 2MB/MeCyh mixtures, where they are the prevalent forms of the two diphenylpolyenes. Copyright © 2016 John Wiley & Sons, Ltd.

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On the dimerization of unsubstituted α,ω-diphenylpolyenes at low concentrations in inert solvents

Catalán

2016

J. Phys. Org. Chem.

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On the temperature‐dependent isomerization of all‐trans‐1,6‐diphenyl‐1,3,5‐hexatriene in solution: A reappraisal

Catalán

2022

J of Physical Organic Chem

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In this work, we present absorption, emission, and excitation of emission spectra of all‐trans‐DPH obtained in solution between 77 and 363 K. The analysis of these spectra allows to evaluate that this molecular probe, widely used in biophysics, does not isomerizes in solution to s‐cis‐DPH at the temperatures explored. These results are in contradiction to those reported by previous studies that emphasize that (a) all‐trans‐DPH isomerizes to s‐cis‐DPH when dissolved and the temperature ranges from 283 to 373 K and (b) the molar fraction of s‐cis‐conformer equals, or even exceeds, the molar fraction of the all‐trans‐conformer at the highest temperature studied. In this work, we show how we can infer the changes taking place in the molecular structure of DPH looking at the wavenumber (ν) shift of the peaks on the absorption and emission spectra as a function of temperature. The analysis of these band shifts allows us to corroborate the change, determined by Ogawa et al. by X‐ray diffraction, that occurs in the structure of DPH in the crystalline phase through a bicycle pedal process with temperature.

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Acid-base and Other Interactions

2024

Handbook of Solvents, Volume 1

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On Saltiel's isopolarizability approach and its applicability to diphenylpolyenes

Cited by 6 publications

References 14 publications

On the dimerization of unsubstituted α,ω-diphenylpolyenes at low concentrations in inert solvents

On the dimerization of unsubstituted α,ω-diphenylpolyenes at low concentrations in inert solvents

On the temperature‐dependent isomerization of all‐trans‐1,6‐diphenyl‐1,3,5‐hexatriene in solution: A reappraisal

Acid-base and Other Interactions

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