Letter | Published:

Photosensitised electron transport across phospholipid vesicle walls

Nature volume 274, pages 507508 (03 August 1978) | Download Citation

Subjects

Abstract

AS a means of solar energy conversion, we are interested in the photosensitised decomposition of water with pigmented lipid bilayer membranes that have O2- and H2-evolving catalysts at opposing membrane surfaces. Our present work toward this goal involves the investigation of light-induced electron transfer reactions between aqueous solutions of electron donors and acceptors that are on opposite sides of single-lamella liposomes (vesicles) with incorporated surfactant photosensitisers. Related experiments with planar bilayer membranes1 or liposomes2–4 using chlorophyll as the photosensitiser have been reported, but it is not clear that energy storage has been achieved in these systems. A possible exception is the photo-oxidation of water with vesicles that contain chlorophyll and trapped aqueous ferricyanide3, although attempts to duplicate this experiment have been unsuccessful5. We report here that we have observed the photosensitised reduction of methyl-viologen (1,1′-dimethyl-4,4′-bipyridinium2+, abbreviated to MV2+) dissolved in the exterior aqueous phase of a phospholipid vesicle dispersion containing a surfactant analogue of tris-(2,2′-bipyridine)ruthenium2+ when ethylenediamine-N,N,N′,N′-tetraacetate (EDTA) is dissolved in the enclosed aqueous phase of the vesicles.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1.

    Brookhaven Symp. Biol. 28, 105–129 (1976).

  2. 2.

    Biochim. biophys. Acta 430, 459–466 (1976).

  3. 3.

    , , & Nature 265, 187–189 (1977).

  4. 4.

    & 26th Int. Congr. pure appl. Chem. Abstr. 234 (1977).

  5. 5.

    & Biochem. biophys. Res. Commun. 81, 212–216 (1978).

  6. 6.

    , & J. biol. Chem. 234, 1297–1302 (1959).

  7. 7.

    , & Chem. Lett. 1977, 1199–1202.

  8. 8.

    , & Nature 259, 145–148 (1976).

  9. 9.

    , & Biochim. biophys. Acta 196, 221–234 (1970).

  10. 10.

    & Biochim. biophys. Acta 298, 1015–1019 (1973).

  11. 11.

    & Ber. Bunsenges 78, 253–259 (1974).

Download references

Author information

Affiliations

  1. Laboratory of Chemical Biodynamics, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720

    • WILLIAM E. FORD
    • , JOHN W. OTVOS
    •  & MELVIN CALVIN

Authors

  1. Search for WILLIAM E. FORD in:

  2. Search for JOHN W. OTVOS in:

  3. Search for MELVIN CALVIN in:

About this article

Publication history

Received

Accepted

Published

DOI

https://doi.org/10.1038/274507a0

Further reading

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.