Photoproduction of Proton Gradients with pi-Stacked Fluorophore Scaffolds in Lipid Bilayers

Bhosale, Sheshanath; Sisson, Adam L.; Talukdar, Pinaki; Fürstenberg, Alexandre; Banerji, Natalie Renuka; Vauthey, Eric; Bollot, Guillaume; Mareda, Jiri; Röger, Cornelia; Würthner, Frank; Sakai, Naomi; Matile, Stefan

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Title		Photoproduction of Proton Gradients with pi-Stacked Fluorophore Scaffolds in Lipid Bilayers
Authors		Bhosale, Sheshanath Sisson, Adam L. Talukdar, Pinaki Fürstenberg, Alexandre Banerji, Natalie Renuka Vauthey, Eric Bollot, Guillaume Mareda, Jiri Röger, Cornelia Würthner, Frank Sakai, Naomi Matile, Stefan show all authors [1 - 12]
Published in		Science. 2006, vol. 313, no. 5783, p. 84-86
Abstract		Rigid p-octiphenyl rods were used to create helical tetrameric {pi}-stacks of blue, red-fluorescent naphthalene diimides that can span lipid bilayer membranes. In lipid vesicles containing quinone as electron acceptors and surrounded by ethylenediaminetetraacetic acid as hole acceptors, transmembrane proton gradients arose through quinone reduction upon excitation with visible light. Quantitative ultrafast and relatively long-lived charge separation was confirmed as the origin of photosynthetic activity by femtosecond fluorescence and transient absorption spectroscopy. Supramolecular self-organization was essential in that photoactivity was lost upon rod shortening (from p-octiphenyl to biphenyl) and chromophore expansion (from naphthalene diimide to perylene diimide). Ligand intercalation transformed the photoactive scaffolds into ion channels.
Identifiers		DOI: 10.1126/science.1127884 PMID: 16825567
Full text		Article (Published version) - Free access Other version: http://www.sciencemag.org/cgi/reprint/313/5783/84.pdf
Structures		Faculté des sciences / Section de chimie et biochimie / Département de chimie physique Faculté des sciences / Section de chimie et biochimie / Département de chimie organique
Research group		Groupe Vauthey
Citation (ISO format)		BHOSALE, Sheshanath et al. Photoproduction of Proton Gradients with pi-Stacked Fluorophore Scaffolds in Lipid Bilayers. In: Science, 2006, vol. 313, n° 5783, p. 84-86. https://archive-ouverte.unige.ch/unige:3301