Chappaz-Gillot, Cyril ; Marek, Peter L. ; Blaive, Bruno J. ; Canard, Gabriel ; Bürck, Jochen ; Garab, Győző ; Hahn, Horst ; Jávorfi, Tamás ; Kelemen, Loránd ; Krupke, Ralph ; Mössinger, Dennis ; Ormos, Pál ; Reddy, Chilla Malla ; Roussel, Christian ; Steinbach, Gábor ; Szabó, Milán ; Ulrich, Anne S. ; Vanthuyne, Nicolas ; Vijayaraghavan, Aravind ; Zupcanova, Anita ; Balaban, Teodor Silviu (2012)
Anisotropic Organization and Microscopic Manipulation of Self-Assembling Synthetic Porphyrin Microrods That Mimic Chlorosomes: Bacterial Light-Harvesting Systems.
In: Journal of the American Chemical Society, 134 (2)
doi: 10.1021/ja203838p
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Being able to control in time and space the positioning, orientation, movement, and sense of rotation of nano- to microscale objects is currently an active research area in nanoscience, having diverse nanotechnological applications. In this paper, we demonstrate unprecedented control and maneuvering of rod-shaped or tubular nanostructures with high aspect ratios which are formed by self-assembling synthetic porphyrins. The self-assembly algorithm, encoded by appended chemical-recognition groups on the periphery of these porphyrins, is the same as the one operating for chlorosomal bacteriochlorophylls (BChl's). Chlorosomes, rod-shaped organelles with relatively long-range molecular order, are the most efficient naturally occurring light-harvesting systems.(1, 2) They are used by green photosynthetic bacteria to trap visible and infrared light of minute intensities even at great depths, e.g., 100 m below water surface or in volcanic vents in the absence of solar radiation. In contrast to most other natural light-harvesting systems, the chlorosomal antennae are devoid of a protein scaffold to orient the BChl's; thus, they are an attractive goal for mimicry by synthetic chemists, who are able to engineer more robust chromophores to self-assemble. Functional devices with environmentally friendly chromophores—which should be able to act as photosensitizers within hybrid solar cells, leading to high photon-to-current conversion efficiencies even under low illumination conditions—have yet to be fabricated. The orderly manner in which the BChl's and their synthetic counterparts self-assemble imparts strong diamagnetic and optical anisotropies and flow/shear characteristics to their nanostructured assemblies, allowing them to be manipulated by electrical, magnetic, or tribomechanical forces.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2012 |
| Autor(en): | Chappaz-Gillot, Cyril ; Marek, Peter L. ; Blaive, Bruno J. ; Canard, Gabriel ; Bürck, Jochen ; Garab, Győző ; Hahn, Horst ; Jávorfi, Tamás ; Kelemen, Loránd ; Krupke, Ralph ; Mössinger, Dennis ; Ormos, Pál ; Reddy, Chilla Malla ; Roussel, Christian ; Steinbach, Gábor ; Szabó, Milán ; Ulrich, Anne S. ; Vanthuyne, Nicolas ; Vijayaraghavan, Aravind ; Zupcanova, Anita ; Balaban, Teodor Silviu |
| Art des Eintrags: | Bibliographie |
| Titel: | Anisotropic Organization and Microscopic Manipulation of Self-Assembling Synthetic Porphyrin Microrods That Mimic Chlorosomes: Bacterial Light-Harvesting Systems |
| Sprache: | Englisch |
| Publikationsjahr: | 18 Januar 2012 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Chemical Society |
| Jahrgang/Volume einer Zeitschrift: | 134 |
| (Heft-)Nummer: | 2 |
| DOI: | 10.1021/ja203838p |
| Kurzbeschreibung (Abstract): | Being able to control in time and space the positioning, orientation, movement, and sense of rotation of nano- to microscale objects is currently an active research area in nanoscience, having diverse nanotechnological applications. In this paper, we demonstrate unprecedented control and maneuvering of rod-shaped or tubular nanostructures with high aspect ratios which are formed by self-assembling synthetic porphyrins. The self-assembly algorithm, encoded by appended chemical-recognition groups on the periphery of these porphyrins, is the same as the one operating for chlorosomal bacteriochlorophylls (BChl's). Chlorosomes, rod-shaped organelles with relatively long-range molecular order, are the most efficient naturally occurring light-harvesting systems.(1, 2) They are used by green photosynthetic bacteria to trap visible and infrared light of minute intensities even at great depths, e.g., 100 m below water surface or in volcanic vents in the absence of solar radiation. In contrast to most other natural light-harvesting systems, the chlorosomal antennae are devoid of a protein scaffold to orient the BChl's; thus, they are an attractive goal for mimicry by synthetic chemists, who are able to engineer more robust chromophores to self-assemble. Functional devices with environmentally friendly chromophores—which should be able to act as photosensitizers within hybrid solar cells, leading to high photon-to-current conversion efficiencies even under low illumination conditions—have yet to be fabricated. The orderly manner in which the BChl's and their synthetic counterparts self-assemble imparts strong diamagnetic and optical anisotropies and flow/shear characteristics to their nanostructured assemblies, allowing them to be manipulated by electrical, magnetic, or tribomechanical forces. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Molekulare Nanostrukturen 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 27 Aug 2012 09:28 |
| Letzte Änderung: | 16 Jun 2014 12:23 |
| PPN: | |
| Sponsoren: | Partial financial support was granted by the Deutsche Forschungsgemeinschaft through the Center for Functional Nanostructures at the Universität Karlsruhe (Projects C3.5 and C3.5b to S.T.B., E1.2 to A.S.U.). , The collaborative work between Marseille and Karlsruhe was facilitated by the CNRS through PICS No. 3777 allocated to C.R., Funding from the Initiative and Networking Fund of the Helmholtz-Gemeinschaft Deutscher Forschungszentren (VH- NG-126) is acknowledged by R.K. and A.V., This work was in part supported by the Hungarian Scientific Research Fund (OTKA/ NKTH CNK 80345 to G.G., GOP-1.1.2-07/1-2008-0007 to G.S. who thanks Biofotonika R&D Ltd. for additional funding). |
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