Joern B. Christensen

Substituted Tetraoxa[8]circulenes - New Members of the Liquid Crystal Family

A general method for the synthesis of substituted tetraoxa[8]circulenes based on alkylation of 2,3-bis(bromomethyl)-1,4-dimethoxybenzene with acetylides is reported. Four of the compounds shows LC behavior, and the tetraoxa[8]circulenes are thus new candidates for discotic mesogens.

Synthesis and properties of redox-active dendrimers containing phenothiazines

A new family of redox-active dendrimers based on a poly(propylene imine) core with phenothiazines as the redox active unit have been prepared, and some of their properties have been investigated.

Hydrogenation of Aromatic Nitro Compounds with an Inexpensive and Efficient CuSO4/CoCl2 Catalyst Prepared in situ using NaBH4 as the Hydrogen Source

Aromatic nitro compounds are in general not reduced by sodium borohydride. A number of research groups have investigated d-block metal salts reduced in situ to form a finely dispersed catalyst for ...