Soccer goes BOXing: synthetic access to novel [6:0] hexakis[(bisoxazolinyl)methano]fullerenes

The syntheses of [6:0] hexakis[(bisoxazolinyl)methano]fullerenes are presented. Two derivatives could be directly obtained using conditions developed by the Sun group. For the remaining products, a two stage protocol had to be developed. All compounds we obtained in synthetically useful scales and were purified via column chromatography with standard achiral phase. These new fullerene adducts bear six metal-chelation sites which are aligned in the three orthogonal space directions and are disposed on a completely rigid scaffold. First experiments indicate that the generation of six-fold metal-complexes is possible with these structures. This makes them very appealing as ligands in asymmetric catalysis and as building blocks in higher supra-molecular assemblies

Soziale Kognitionen, Sozialverhalten und Akzeptanz durch Gleichaltrige bei Kindern im Vorschulalter

"Im vorliegenden Beitrag wird der Zusammenhang zwischen der sozialkognitiven Entwicklung und sozialer Akzeptanz durch Gleichaltrige im Vorschulalter dargestellt. Neben einem direkten Effekt sozialer Kognitionen auf die soziale Akzeptanz wird ein Mediationseffekt des Sozialverhaltens auf diesen Zusammenhang geprüft. Untersucht wurden 35 Kindergartenkinder im Alter von vier bis sechs Jahren. Zur Erfassung des sozialkognitiven Entwicklungsstandes bearbeiteten die Kinder Theory of Mind und Perspektivenübernahme-Aufgaben; ihre soziale Akzeptanz wurde durch Peernominationen sowie eine Erzieher-Beurteilung der Integration der Kinder in die Gruppe erhoben. Das prosoziale und aggressive Sozialverhalten der Kinder wurde durch die Erzieherinnen eingeschätzt. Es zeigte sich ein direkter Zusammenhang zwischen dem sozial-kognitiven Entwicklungsstand und der sozialen Akzeptanz der Kinder. Die Annahme, dass dieser Zusammenhang durch das prosoziale bzw. aggressive Verhalten der Kinder mediiert wird, bestätigte sich nur bedingt." (Autorenreferat)"The topic of the present study is the correlation between social cognition and social acceptance in the preschool age group. It was assumed, based on earlier research, that there was a direct effect of social cognition (theory of mind, perspective-taking ability) on social acceptance as well as a mediation effect of social behaviour on that correlation. These hypotheses were tested on a sample of 35 preschool children who were four to six years old. The children answered questions regarding false belief-tasks andwere asked to nominate their favourite playmates. The nursery school teachers evaluated the social behaviour and the integration of the children in the group by the means of a questionnaire. Results revealed a direct correlation between perspective-taking and social acceptance. The assumption that the correlation between perspective-taking and social acceptance was mediated by prosocial and aggressive behaviours could not be verified." (author's abstract

Acceptor Derivatization of the 4CzIPN TADF System: Color Tuning and Introduction of Functional Groups

We demonstrate modular modifications of the widely employed emitter 2,4,5,6-tetra(9H-carbazol-9-yl)isophthalonitrile (4CzIPN) by replacing one or both nitrile acceptors with oxadiazole groups via a tetrazole intermediate. This allows the introduction of various functional groups including halides, alkynes, alkenes, nitriles, esters, ethers and a protected amino acid while preserving the thermally activated delayed fluorescence (TADF) properties. The substituents control the emission maximum of the corresponding emitters, ranging between 472–527 nm, and show high solid-state photoluminescence quantum yields up to 85%. The TADF emission of two compounds, 4CzCNOXDtBu and 4CzdOXDtBu, a mono- and a bis-oxadiazole substituted 4CzIPN is characterized in detail by time- and temperaturedependent photoluminescence. Solution-processed OLEDs comprising 4CzCNOXDtBu and 4CzdOXDtBu show a significant blue-shift of the emission compared to the reference 4CzIPN, with external quantum efficiencies of 16%, 5.9% and 17% at 100 cdm⁻², respectively

Identifying confidentiality violations in architectural design using palladio

Meeting confidentiality requirements in software systems is vital for organizations. Considering confidentiality in early development phases such as the architectural design phase is beneficial compared to late phases such as the implementation because fixing design issues is more cost-efficient in early phases. This tutorial introduces an approach for modeling and statically analyzing confidentiality in software architectures within the Palladio tool suite. Besides foundational knowledge, the tutorial provides a practical hands-on session using the tool. The goal is to show that it is already possible to consider confidentiality in the early design process and that this consideration can be integrated into existing architectural design tools

Synthesis of highly functionalized C₆₀ fullerene derivatives and their applications in material and life sciences

Highly functionalized fullerenes can be efficiently constructed by various techniques. However, the challenge is to synthesize highly symmetrical fullerenes. Recently, a number of X-ray structures have been disclosed showing the high symmetry of substituted fullerenes. By reviewing the major types of multi functionalized fullerenes through selected examples with a link to the structural assignments, the authors intend to give a concise overview to the specialist in the field and to provide the non-specialist with a tool box of possibilities

Acceptor Derivatization of the 4CzIPN TADF System : Color Tuning and Introduction of Functional Groups

We demonstrate modular modifications of the widely employed emitter 2,4,5,6-tetra(9H-carbazol-9-yl)isophthalonitrile (4CzIPN) by replacing one or both nitrile acceptors with oxadiazole groups via a tetrazole intermediate. This allows the introduction of various functional groups including halides, alkynes, alkenes, nitriles, esters, ethers and a protected amino acid while preserving the thermally activated delayed fluorescence (TADF) properties. The substituents control the emission maximum of the corresponding emitters, ranging between 472-527 nm, and show high solid-state photoluminescence quantum yields up to 85 %. The TADF emission of two compounds, 4CzCNOXDtBu and 4CzdOXDtBu, a mono- and a bis-oxadiazole substituted 4CzIPN is characterized in detail by time- and temperature-dependent photoluminescence. Solution-processed OLEDs comprising 4CzCNOXDtBu and 4CzdOXDtBu show a significant blue-shift of the emission compared to the reference 4CzIPN, with external quantum efficiencies of 16 %, 5.9 % and 17 % at 100 cd m(-2), respectively.Peer reviewe

Synthesis of highly functionalized C-60 fullerene derivatives and their applications in material and life sciences

International audienceHighly functionalized fullerenes can be efficiently constructed by various techniques. However, the challenge is to synthesize highly symmetrical fullerenes. Recently, a number of X-ray structures have been disclosed showing the high symmetry of substituted fullerenes. By reviewing the major types of multi functionalized fullerenes through selected examples with a link to the structural assignments, the authors intend to give a concise overview to the specialist in the field and to provide the non-specialist with a tool box of possibilities