Concept

Photosensitizer

Related publications (112)

Light-induced spin crossover in Fe(II)-based complexes: The full photocycle unraveled by ultrafast optical and X-ray spectroscopies

Majed Chergui, Frank van Mourik, Andrea Cannizzo, Wojciech Gawelda, Cristina Consani

The light-induced spin and structure changes upon excitation of the singlet metal-to-ligand charge transfer (1MLCT) state of Fe(II)-polypyridine complexes are investigated in detail in the case of aqueous iron(II)-tris-bipyridine ([FeII(bpy)3]2+) by a comb ...

Elsevier2010

Chitosan-based nanogels for selective delivery of photosensitizers to macrophages and improved retention in and therapy of articular joints

Georges Wagnières, Jutta Christine Wandrey, Frédéric Schmitt, Jérôme Barge, Lucienne Lagopoulos

Macrophages play key roles in inflammatory disorders. Therefore, they are targets of treatments aiming at their local destruction in inflammation sites. However, injection of low molecular mass therapeutics, including photosensitizers, in inflamed joints r ...

Elsevier2010

In vitro and in vivo photocytotoxicity of boron dipyrromethene derivatives for photodynamic therapy

Hubert van den Bergh, Georges Wagnières, Patrycja Nowak-Sliwinska, Siang Hui Lim

To understand the effects of substitution patterns on photosensitizing the ability of boron dipyrromethene (BODIPY), two structural variations that either investigate the effectiveness of various iodinated derivatives to maximize the "heavy atom effect" or ...

American Chemical Society2010

Regeneration of Oxidized Organic Photo-Sensitizers in Graetzel Solar Cells: quantum-Chemical Portrait of a General Mechanism

Ulf Anders Hagfeldt

The article presents DFT calcns. that elucidate the interaction of a redox mediator, iodide/triiodide, and an oxidized org. dye photo-sensitizer, providing electronic structure insight into all steps of the mechanism involved in dye-sensitized solar cells. ...

2010

Triplet State Imaging

Dimitri Nestor Alice Van De Ville, Theo Lasser, Boris Hinz, Iwan Märki, Thiemo Spielmann, Aurélie Formey de Saint Louvent

We present a functional imaging method based on triplet state kinetics. The triplet state of many known fluorophores shows a triplet lifetime typically in the order of ~10e-6 – 10e-3 s, 3-6 orders of magnitude longer than the associated fluorescence single ...

2009

A Study of the Interactions between I-/I3- Redox Mediators and Organometallic Sensitizing Dyes in Solar Cells

Ulf Anders Hagfeldt

Specific interactions of the I-/I3- redox mediators with the reduced and oxidized dye, Ru(4,4'-dicarboxy-2,2'-bipyridyl)2(NCS)2, referred to as N3 or Ru(dcbpy)2(NCS)2, were studied by d. functional theory (DFT) with the focus on the charge transfer process ...

2009

Dynamic nuclear polarization techniques for magnetic resonance imaging and particles targets experiments

Sami Jannin

Within a collaboration with the Sample Environment and Polarised Targets (SEPT) group at Paul Scherrer Institut (PSI), we developed two Dynamic Nuclear Polarization (DNP) machines operating at ~ 1 K. The first one is working at an electron spin resonance f ...

EPFL2009

Structural determination of photochemically active diplatinum molecule by time-resolved EXAFS spectroscopy

Majed Chergui, Van Thai Pham, Amal El Nahhas, Renske Marjan van der Veen, Frederico Alves Lima

Metallica: A large contraction of the PtPt bond in the triplet excited state of the photoreactive [Pt2(P2O5H2)4]4- ion is determined by time-resolved X-ray absorption spectroscopy (see picture). The strengthening of the PtPt interaction is accompanied by a ...

2009

High Open-Circuit Voltage Solid-State Dye-Sensitized Solar Cells with Organic Dye

Michael Graetzel, Mohammad Khaja Nazeeruddin, Jun Ho Yum, Filippo de Angelis, Soo-Jin Moon, Peter Chen

Solid-state dye-sensitized solar cells were fabricated using an organic dye, 2-cyanoacrylic acid-4-(bis-dimethylfluoreneaniline)dithiophene (JK2), which exhibits more than 1 V open-circuit potential (V-oc). To scrutinize the origin of high voltage in these ...

2009

Structure-Function Relationships in Unsymmetrical Zinc Phthalocyanines for Dye-Sensitized Solar Cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Jun Ho Yum

A series of unsymmetrical zinc phthalocyanines bearing an anchoring carboxylic function linked to the phthalocyanine ring through different spacers were designed for dye-sensitised solar cells (DSSC). The modification of the spacer group allows not only a ...

2009

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