Nitrogen-Doped Colloidal Graphene Quantum Dots and Their Size-Dependent Electrocatalytic Activity for the Oxygen Reduction Reaction
摘要:
Nitrogen doping has been a powerful way to modify the properties of carbon materials ranging from activated carbon to graphene. Here we report on a solution chemistry approach to nitrogen-doped colloidal graphene quantum dots with well-defined structures. N-doping was demonstrated to significantly affect the properties of the quantum dots, including the emergence of size-dependent electrocatalytic activity for the oxygen reduction reaction.
Synthesis of Large, Stable Colloidal Graphene Quantum Dots with Tunable Size
摘要:
We report a solution-chemistry-based approach to large, stable colloidal graphene quantum dots with uniform size and shape. The versatility of solution chemistry allows us to tune the structures of the graphenes and thus their properties.
The present application relates to triarylamine compounds of a defined formula. The present application further relates to processes for preparing the compounds, to the use of the compounds in electronic devices, and to electronic devices comprising the compounds.
Through the Maze: Cross-Coupling Pathways to a Helical Hexaphenyl “Geländer” Molecule
作者:Michel Rickhaus、Linda Maria Bannwart、Oliver Unke、Heiko Gsellinger、Daniel Häussinger、Marcel Mayor
DOI:10.1002/ejoc.201403322
日期:2015.2
highlights a new concept on how to induce chirality in a hexaphenyl GelA¤nder-type system. Bridging a terphenyl backbone with a considerably longer benzyl ether oligomer enforces a continuous twist of the molecule, while preventing an achiral meso form. By highlighting cross-coupling strategies and explored synthetic pathways, this report aims to serve as an Ariadne`s thread for the synthesis of precisely
The present invention relates to carbazole derivatives, in particular for use as triplet matrix materials in organic electroluminescent devices. The invention further relates to a method for producing the compounds according to the invention and to electronic devices comprising same.
The present application relates to a compound of a formula (I) which contains an indenocarbazole group, a carbazole group and an electron-deficient group bonded to the indenocarbazole group. The compound is suitable for use in electronic devices, in particular in organic electroluminescent devices.