Energy Transfer and Fluorescence Quenching in Chlorophyll Containing Vesicles
Abstract Fluorescence spectroscopic experiments are reported on dimyristoyllecithin (DML) vesicles containing pheophytin a, chlorophyll a or chlorophyll b. From the temperature as well as from the concentration dependence of the fluorescence intensity a phase separation at low temperatures is observ...
Published in: | Berichte der Bunsengesellschaft für physikalische Chemie |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
1978
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/bbpc.19780820930 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fbbpc.19780820930 https://onlinelibrary.wiley.com/doi/pdf/10.1002/bbpc.19780820930 |
id |
crwiley:10.1002/bbpc.19780820930 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/bbpc.19780820930 2024-06-02T08:05:47+00:00 Energy Transfer and Fluorescence Quenching in Chlorophyll Containing Vesicles Luisetti, J. Galla, H.‐J. Möhwald, H. 1978 http://dx.doi.org/10.1002/bbpc.19780820930 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fbbpc.19780820930 https://onlinelibrary.wiley.com/doi/pdf/10.1002/bbpc.19780820930 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Berichte der Bunsengesellschaft für physikalische Chemie volume 82, issue 9, page 911-916 ISSN 0005-9021 0005-9021 journal-article 1978 crwiley https://doi.org/10.1002/bbpc.19780820930 2024-05-03T11:15:03Z Abstract Fluorescence spectroscopic experiments are reported on dimyristoyllecithin (DML) vesicles containing pheophytin a, chlorophyll a or chlorophyll b. From the temperature as well as from the concentration dependence of the fluorescence intensity a phase separation at low temperatures is observed: The chlorophylls are solubilized by the DML phase only up to concentrations of the order of 1 mole‐%. the excess molecules being precipitated in domains containing almost exclusively the chlorophylls. – Whereas at high temperatures (30°C) for chlorophyll a containing vesicles a phase separation could not be established, this was possible in the pheophytin case. The pheophytin solubility in the liquid DML phase amounts to about 10 mole‐%, which is consistent with monolayer studies of the system. – The efficiency of energy transfer from chlorophyll b to chlorophyll a increases with decreasing temperature for small chlorophyll concentrations (< 1 mol‐%). This is due to the decrease in intermolecular distance on solidification of the lipid. The temperature dependence of the transfer efficiency is reversed at high chlorophyll concentrations (≤ 20 mole‐%). This is interpreted as a consequence of the decrease of the chlorophyll solubility in the DML phase that causes a decrease in the chlorophyll‐chlorophyll distance. Article in Journal/Newspaper DML Wiley Online Library Berichte der Bunsengesellschaft für physikalische Chemie 82 9 911 916 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Fluorescence spectroscopic experiments are reported on dimyristoyllecithin (DML) vesicles containing pheophytin a, chlorophyll a or chlorophyll b. From the temperature as well as from the concentration dependence of the fluorescence intensity a phase separation at low temperatures is observed: The chlorophylls are solubilized by the DML phase only up to concentrations of the order of 1 mole‐%. the excess molecules being precipitated in domains containing almost exclusively the chlorophylls. – Whereas at high temperatures (30°C) for chlorophyll a containing vesicles a phase separation could not be established, this was possible in the pheophytin case. The pheophytin solubility in the liquid DML phase amounts to about 10 mole‐%, which is consistent with monolayer studies of the system. – The efficiency of energy transfer from chlorophyll b to chlorophyll a increases with decreasing temperature for small chlorophyll concentrations (< 1 mol‐%). This is due to the decrease in intermolecular distance on solidification of the lipid. The temperature dependence of the transfer efficiency is reversed at high chlorophyll concentrations (≤ 20 mole‐%). This is interpreted as a consequence of the decrease of the chlorophyll solubility in the DML phase that causes a decrease in the chlorophyll‐chlorophyll distance. |
format |
Article in Journal/Newspaper |
author |
Luisetti, J. Galla, H.‐J. Möhwald, H. |
spellingShingle |
Luisetti, J. Galla, H.‐J. Möhwald, H. Energy Transfer and Fluorescence Quenching in Chlorophyll Containing Vesicles |
author_facet |
Luisetti, J. Galla, H.‐J. Möhwald, H. |
author_sort |
Luisetti, J. |
title |
Energy Transfer and Fluorescence Quenching in Chlorophyll Containing Vesicles |
title_short |
Energy Transfer and Fluorescence Quenching in Chlorophyll Containing Vesicles |
title_full |
Energy Transfer and Fluorescence Quenching in Chlorophyll Containing Vesicles |
title_fullStr |
Energy Transfer and Fluorescence Quenching in Chlorophyll Containing Vesicles |
title_full_unstemmed |
Energy Transfer and Fluorescence Quenching in Chlorophyll Containing Vesicles |
title_sort |
energy transfer and fluorescence quenching in chlorophyll containing vesicles |
publisher |
Wiley |
publishDate |
1978 |
url |
http://dx.doi.org/10.1002/bbpc.19780820930 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fbbpc.19780820930 https://onlinelibrary.wiley.com/doi/pdf/10.1002/bbpc.19780820930 |
genre |
DML |
genre_facet |
DML |
op_source |
Berichte der Bunsengesellschaft für physikalische Chemie volume 82, issue 9, page 911-916 ISSN 0005-9021 0005-9021 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/bbpc.19780820930 |
container_title |
Berichte der Bunsengesellschaft für physikalische Chemie |
container_volume |
82 |
container_issue |
9 |
container_start_page |
911 |
op_container_end_page |
916 |
_version_ |
1800750667241881600 |