Charge separation: From the topology of molecular electronic transitions to the dye/semiconductor interfacial energetics and kinetics

Charge separation properties, that is the ability of a chromophore, or a chromophore/semiconductor interface, to separate charges upon light absorption, are crucial characteristics for an efficient photovoltaic device. Starting from this concept, we devote the first part of this book chapter to the topological analysis of molecular electronic transitions induced by photon capture. Such analysis can be either qualitative or quantitative, and is presented here in the framework of the reduced density matrix theory applied to single-reference, multiconfigurational excited states. The qualitative strategies are separated into density-based and wave function-based approaches, while the quantitative methods reported here for analysing the photoinduced charge transfer nature are either fragment-based, global or statistical. In the second part of this chapter we extend the analysis to dye-sensitized metal oxide surface models, discussing interfacial charge separation, energetics and electron injection kinetics from the dye excited state to the semiconductor conduction band states

Bemerkenswerte Farnfunde bei Wissen (Sieg) und Bergneustadt (Oberbergischer Kreis)

Hans Bäpple

Asplenium trichomanes nothosubsp. lusaticum (Aspleniaceae) in the border region of North Rhine-Westphalia and Rhineland-Palatinate

Asplenium trichomanes nothosubsp. lusaticum konnte im Grenzgebiet der Bundesländer Nordrhein-Westfalen und Rheinland-Pfalz bestätigt werden. Nach aktuellem Kenntnisstand handelt es sich um die ersten flow-cytometrisch gesicherten Nachweise für beide Bundesländer.Asplenium trichomanes nothosubsp. lusaticum was found in the border region of the two federal states North Rhine-Westphalia and Rhineland-Palatinate, Germany. This is the first record for this taxon verified by flow cytometry for both states so far known

"Jag kan kalla mig mysfarbror..." : En studie av manliga förskolepedagogers beskrivningar av hur de positionerar sig i sin yrkespraktik

In Sweden, male pedagogues in preschools make up only 3,5% of the employees. Since they are a minority, do they experience themselves as being positioned peculiarly by the female staff? The preschool curriculum says that the adults should be role models for gender equality and neutralize traditional gender roles, but if a shelf needs to be hung up or heavy items need to be lifted, who will be asked to do those tasks? The purpose of this thesis was to examine how male pedagogues in the study are being positioned in a female-dominated occupation. Which subject positions appear, and how do they appear, from the informants’ descriptions of their occupation? We wanted to find out how male pedagogues describe their work practice according to which masculinity norms appear. The study was made through interviews with seven male pedagogues working in three different preschools. The theories we used to analyze the material was Raewyn Connell and Rebecca Pearse’s perspective on gender and Connell’s masculinities and Marianne Winther Jörgensen and Louise Phillips interpretation on Ernesto Laclau and Chantal Mouffe’s discourse theory. The result of the study was that depending on how men are being positioned we can find different answers. When they position themselves as “preschool pedagogues” they claim that men and women work equally, whilst when they position themselves as “men” they describe how they are being expected to do tasks that are masculinely coded. Some informants are being expected to perform like a supply father and role model. Thus, some of the male pedagogues perceive the preschool as a practice where traditional gender roles are being reproduced.

"Jag kan kalla mig mysfarbror..." : En studie av manliga förskolepedagogers beskrivningar av hur de positionerar sig i sin yrkespraktik

In Sweden, male pedagogues in preschools make up only 3,5% of the employees. Since they are a minority, do they experience themselves as being positioned peculiarly by the female staff? The preschool curriculum says that the adults should be role models for gender equality and neutralize traditional gender roles, but if a shelf needs to be hung up or heavy items need to be lifted, who will be asked to do those tasks? The purpose of this thesis was to examine how male pedagogues in the study are being positioned in a female-dominated occupation. Which subject positions appear, and how do they appear, from the informants’ descriptions of their occupation? We wanted to find out how male pedagogues describe their work practice according to which masculinity norms appear. The study was made through interviews with seven male pedagogues working in three different preschools. The theories we used to analyze the material was Raewyn Connell and Rebecca Pearse’s perspective on gender and Connell’s masculinities and Marianne Winther Jörgensen and Louise Phillips interpretation on Ernesto Laclau and Chantal Mouffe’s discourse theory. The result of the study was that depending on how men are being positioned we can find different answers. When they position themselves as “preschool pedagogues” they claim that men and women work equally, whilst when they position themselves as “men” they describe how they are being expected to do tasks that are masculinely coded. Some informants are being expected to perform like a supply father and role model. Thus, some of the male pedagogues perceive the preschool as a practice where traditional gender roles are being reproduced.

Excited state vibrational coherence in a binuclear metal adduct: wave packet phase dependant molecular fragmentation under variation of ligand size

Ultrafast vibrational coherence with metal-metal stretching mode character is observed for phosphine-bridged d10-d10 complexes of different size, containing the binuclear [Ag2Cl]+ chromophore in an ion trap. Fragmentation pathways are governed by the wave packet's phase