Citation: Fan Wu, Hu Gao, Yue Zhao, Zhen Shen. Ground state singlet-to-triplet conversion of copper corrole radical by β-benzo-fusion[J]. Chinese Chemical Letters, ;2023, 34(8): 107994. doi: 10.1016/j.cclet.2022.107994 shu

Ground state singlet-to-triplet conversion of copper corrole radical by β-benzo-fusion

State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China

zshen@nju.edu.cn

Received Date: 2 September 2022
Revised Date: 23 September 2022
Accepted Date: 7 November 2022
Available Online: 10 November 2022

Figures(5)

Materials with facilely tunable spin configurations based on metal-radical coordination systems have potential applications for electronics and spintronics. Here, we report the ground state conversion of copper corrole radicals from singlet to triplet via the extension of the π-conjugation system by benzo-fusion at the β-position of corrole ligand. NMR spectroscopy, SQUID measurements and computational studies all support the ferromagnetic coupling between the Cu(Ⅱ) center and corrole π-radical of benzo-fused copper corrole 2-Cu, which is in sharp contrast with the antiferromagnetic coupling in regular non-extended copper corroles. The triplet 2-Cu is highly stable in air, and X-ray diffraction analysis revealed its unique highly planar corrole macrocycle. This work offers a promising strategy for creating high-spin systems in non-innocent metallocorroles.
- Radicals,
- Porphyrinoids,
- Copper,
- Ferromagnetic interaction,
- Ring-fused systems
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