1. Tetrabenzo-Chichibabin's hydrocarbons: substituent effects and unusual thermochromic and thermomagnetic behaviours
- Author
-
Xinhao Wang, Haipeng Wei, Samir El-Hankari, Yawen Bang, Jishan Wu, Xuefeng Lu, Zhenglong Lim, Zebing Zeng, and Chuanling Jiang
- Subjects
chemistry.chemical_classification ,Thermochromism ,010405 organic chemistry ,Chemistry ,Metals and Alloys ,Substituent ,General Chemistry ,Thermomagnetic convection ,010402 general chemistry ,01 natural sciences ,Catalysis ,0104 chemical sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,chemistry.chemical_compound ,Crystallography ,Hydrocarbon ,Chemical bond ,Materials Chemistry ,Ceramics and Composites ,Structural motif - Abstract
Open-shell π-conjugated compounds have recently received intense attention due to their unique properties and promising applications in materials science. However, the experiments on how the substituents affect their chemical bonding and structural motif remain less addressed. In this work, a series of tetrabenzo-Chichibabin's hydrocarbon (TBC) derivatives substituted by different electron-donating or -withdrawing groups at the termini were synthesized. The substituent effect was studied via X-ray crystallographic analysis. The strong electron-donating dimethylamino-group substituted TBC derivative underwent simultaneous oxidation to give two cyanine-like moieties at the termini. More interestingly, it exhibited unusual thermochromic and thermomagnetic behaviours.
- Published
- 2018