Polymorphism-dependent spin-crossover: Hysteretic two-step spin transition with an ordered HS-HS-LS intermediate phase

Jie Luan (1, 2) , Jian Zhou (1, 2) , Z. Liu (1, 2) , Bowen Zhu (1, 2) , Huisi Wang (1, 2) , Xin Bao (1, 2) , Wei Liu (3) , Ming-Liang Tong (3) , Guo Peng (2) , Haonan Peng (4) , L. Salmon (4) , Azzedine Bousseksou (4)

1 NJUST - School of Chemical Engineering [Nanjing University]
2 Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, 210094 Nanjing
3 Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering
4 LCC - Laboratoire de chimie de coordination

A mononuclear ikon(II) complex has been isolated in two polymorphs. Polymorph 1b remains high-spin over all temperatures, whereas polymorph 1a undergoes a cooperative two-Step spin crossover accompanied by symmetry breaking, showing an ordered 2:1 high-spin low-spin intermediate phase.

Domaines: Chimie de coordination

Jie Luan, Jian Zhou, Z. Liu, Bowen Zhu, Huisi Wang, et al.. Polymorphism-dependent spin-crossover: Hysteretic two-step spin transition with an ordered HS-HS-LS intermediate phase. Inorganic Chemistry, 2015, 54 (11), pp.5145-5147. ⟨10.1021/acs.inorgchem.5b00629⟩. ⟨hal-01919608⟩