Synthesis of Carbon Showing Weak Antiferromagnetic Behavior at a Low Temperature

In this short communication, we report a new carbon material prepared from meta-linked polyaniline that exhibits weak antiferromagnetic interactions at low temperature. The synthesis of poly(meta-aniline), abbreviated as m-PANI, was conducted using the Ullmann reaction with the aid of Cu+ as a catalyst in the presence of K2CO3. After the generation of radical cations by vapor-phase doping with iodine, carbonization was performed to prepare carbon polyaniline (C-PANI), which comprises condensed benzene rings. Analysis with a superconducting quantum interference device revealed that the resultant carbon exhibits antiferromagnetism at low temperatures. The discovery of this weak antiferromagnetic carbon may contribute to the development of carbon magnets

Synthesis of Carbon Showing Weak Antiferromagnetic Behavior at a Low Temperature

In this short communication, we report a new carbon material prepared from meta-linked polyaniline that exhibits weak antiferromagnetic interactions at low temperature. The synthesis of poly(meta-aniline), abbreviated as m-PANI, was conducted using the Ullmann reaction with the aid of Cu+ as a catalyst in the presence of K2CO3. After the generation of radical cations by vapor-phase doping with iodine, carbonization was performed to prepare carbon polyaniline (C-PANI), which comprises condensed benzene rings. Analysis with a superconducting quantum interference device revealed that the resultant carbon exhibits antiferromagnetism at low temperatures. The discovery of this weak antiferromagnetic carbon may contribute to the development of carbon magnets

Selective Synthesis of 1,3-Substituted Cuneanes: En Route to Potent Bioisosteres of m-Substituted Benzenes

We herein disclose a method to obtain 1,3-substituted cuneane by selective isomerization of 1,4-substituted cubanes. The electronic property of the substituent strongly affects the isomerization ratio of 1,3-substituted cuneane and 2,6-substituted cuneane. Based on structural similarity, we considered that 1,3-substituted cuneane would be a bioisostere of m-substituted benzene. The synthesis of a cuneane analogs of pharmaceuticals having m-substituted benzene moiety and its biological and in silico evaluation are also described