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On the Electronic Structure of Cu Chlorophyllin and Its Breakdown Products: A Carbon K-Edge X-ray Absorption Spectroscopy Study
Tech Univ Berlin, Inst Opt & Atomare Phys, D-10623 Berlin, Germany.;Tech Univ Berlin, Berlin Lab Innovat Xray Technol BLiX, D-10623 Berlin, Germany.;Paul Scherrer Inst, CH-5232 Villigen, Switzerland..
Tech Univ Berlin, Inst Opt & Atomare Phys, D-10623 Berlin, Germany.;Tech Univ Berlin, Berlin Lab Innovat Xray Technol BLiX, D-10623 Berlin, Germany..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. Univ Seville, Dept Phys Chem, C Prof Garcia Gonzalez S-N, E-41012 Seville, Spain..
Charles Univ Prague, Fac Math & Phys, Dept Chem Phys & Opt, Ke Karlovu 3, CR-12116 Prague, Czech Republic..
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2018 (English)In: Journal of Physical Chemistry B, ISSN 1520-6106, E-ISSN 1520-5207, Vol. 122, no 6, p. 1846-1851Article in journal (Refereed) Published
Abstract [en]

Using near-edge X-ray absorption fine structure (NEXAFS) spectroscopy, the carbon backbone of sodium copper chlorophyllin (SCC), a widely used chlorophyll derivative, and its breakdown products are analyzed to elucidate their electronic structure and physicochemical properties. Using various sample preparation methods and complementary spectroscopic methods (including UV/Vis, X-ray photoelectron spectroscopy), a comprehensive insight into the SCC breakdown process is presented. The experimental results are supported by density functional theory calculations, allowing a detailed assignment of characteristic NEXAFS features to specific C bonds. SCC can be seen as a model system for the large group of porphyrins; thus, this work provides a novel and detailed description of the electronic structure of the carbon backbone of those molecules and their breakdown products. The achieved results also promise prospective optical pump/X-ray probe investigations of dynamic processes in chlorophyll-containing photosynthetic complexes to be analyzed more precisely.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2018. Vol. 122, no 6, p. 1846-1851
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Physical Chemistry
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URN: urn:nbn:se:uu:diva-349358DOI: 10.1021/acs.jpcb.7b12108ISI: 000425570700008PubMedID: 29350531OAI: oai:DiVA.org:uu-349358DiVA, id: diva2:1201841
Funder
EU, Horizon 2020, 701647Available from: 2018-04-26 Created: 2018-04-26 Last updated: 2018-04-26Bibliographically approved

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Sanchez-de-Armas, Rocio

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