Long-Range Orientational Organization of Dipolar and Steric Liquids - Université Claude Bernard Lyon 1
Article Dans Une Revue Journal of Physical Chemistry Letters Année : 2020

Long-Range Orientational Organization of Dipolar and Steric Liquids

Résumé

Long-range orientational correlations in liquids have received recent renewed interest, in particular for the neat water case. These long-range orientational correlations, exceeding several tens of nanometers, originate from the presence of the strong permanent water dipolar moment. However, the exact dependence with the dipolar moment and the role of other local forces like steric hindrance has never been addressed. In this work, we experimentally measure long-range correlations for a set of liquids differing by their molecular weight and dipolar moment, in order to reveal the origin of their long-range organization. Hence, we show that the dipolar moment of a solvent molecule is not the unique feature determining the orientational correlation. Steric hindrance significantly helps to structure the liquids as well. In order to quantify these long-range correlations, we also derive theoretically the polarization resolved second harmonic scattering intensity as a function of the rotational invariants describing the dipolar and octupolar interaction.
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Dates et versions

hal-03060458 , version 1 (14-12-2020)

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Julien Duboisset, Fabien Rondepierre, Pierre-François Brevet. Long-Range Orientational Organization of Dipolar and Steric Liquids. Journal of Physical Chemistry Letters, 2020, 11 (22), pp.9869-9875. ⟨10.1021/acs.jpclett.0c02705⟩. ⟨hal-03060458⟩
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