The inter- and intramolecular interactions of the carbonyl moieties at the polar interface of a phospholipid membrane are probed by using nonlinear femtosecond infrared spectroscopy. Twodimensional IR correlation spectra separate homogeneous and inhomogeneous broadenings and show a distinct cross-peak pattern controlled by electrostatic interactions. The inter- and intramolecular electrostatic interactions determine the inhomogeneous character of the optical response. Using molecular dynamics simulation and the nonlinear exciton equations approach, we extract from the spectra short-range structural correlations between carbonyls at the interface.

Electrostatic interactions in phospholipid membranes revealed by coherent 2D IR spectroscopy / Volkov, V. Volkov; Chelli, Riccardo; Zhuang, Wei; Nuti, Francesca; Takaoka, Yuji; Papini, Anna Maria; Mukamel, Shaul; Righini, Roberto. - In: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. - ISSN 0027-8424. - STAMPA. - 104:(2007), pp. 15323-15327. [10.1073/pnas.0706426104]

Electrostatic interactions in phospholipid membranes revealed by coherent 2D IR spectroscopy

CHELLI, RICCARDO;Nuti, Francesca;PAPINI, ANNA MARIA;RIGHINI, ROBERTO
2007

Abstract

The inter- and intramolecular interactions of the carbonyl moieties at the polar interface of a phospholipid membrane are probed by using nonlinear femtosecond infrared spectroscopy. Twodimensional IR correlation spectra separate homogeneous and inhomogeneous broadenings and show a distinct cross-peak pattern controlled by electrostatic interactions. The inter- and intramolecular electrostatic interactions determine the inhomogeneous character of the optical response. Using molecular dynamics simulation and the nonlinear exciton equations approach, we extract from the spectra short-range structural correlations between carbonyls at the interface.
2007
104
15323
15327
Volkov, V. Volkov; Chelli, Riccardo; Zhuang, Wei; Nuti, Francesca; Takaoka, Yuji; Papini, Anna Maria; Mukamel, Shaul; Righini, Roberto
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/370554
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