English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Solvation dynamics at aqueous lipid-membrane interfaces explored by temperature-dependent 3-pulse-echo peak shifts: Influence of the lipid polymorphism

Buersing, H., Kundu, S., & Voehringer, P. (2003). Solvation dynamics at aqueous lipid-membrane interfaces explored by temperature-dependent 3-pulse-echo peak shifts: Influence of the lipid polymorphism. Journal of Physical Chemistry B, 107(10), 2404-2414. Retrieved from http://pubs.acs.org/doi/pdfplus/10.1021/jp027036t.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-F13F-5 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-924D-9
Genre: Journal Article

Files

show Files
hide Files
:
20756.pdf (Publisher version), 0B
Name:
20756.pdf
Description:
-
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Buersing, H.1, Author              
Kundu, S.1, Author              
Voehringer, P.1, Author              
Affiliations:
1Research Group of Biomolecular and Chemical Dynamics, MPI for biophysical chemistry, Max Planck Society, ou_578553              

Content

show
hide
Free keywords: -
 Abstract: Three-pulse photon-echo peak-shift (3PEPS) experiments were performed to investigate structural relaxations relevant to solvation dynamics of a cyanine dye which is noncovalently anchored to aqueous interfaces of unilamellar phospholipid vesicles. For comparison, complementary 3PEPS measurements were performed on the same optical chromophore dissolved in bulk water. The influence of the lipid polymorphism is studied in great detail through the temperature dependence of the 3PEPS decay. As opposed to the main order/ disorder phase transition connected with packing phenomena in the hydrophobic membrane core, the rippled gel-to-gel pretransition strongly modifies the solvation response on time scales below 2 ps. This finding indicates that the pretransition is connected with structural modifications of the hydration shell surrounding the polar headgroups of the lipids and is consistent with a dehydration of the interface upon cooling the rippled-gel phases and entering the pure gel phases of the membranes. A comparison between the temperature dependencies of the 3PEPS decay and the linear absorption spectrum strongly suggests that a formal division of water above lipid membranes into "bound" and "free" species only is too simplistic.

Details

show
hide
Language(s): eng - English
 Dates: 2003-03-13
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of Physical Chemistry B
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 107 (10) Sequence Number: - Start / End Page: 2404 - 2414 Identifier: -