1
|
Yu ZM, Zhao SZ, Wang YT, Xu PY, Qin CY, Li YH, Zhou XH, Wang S. Anion-driven supramolecular modulation of spin-crossover properties in mononuclear iron(III) Schiff-base complexes. Dalton Trans 2021; 50:15210-15223. [PMID: 34622889 DOI: 10.1039/d1dt02394b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of Fe(III) complexes [Fe(5-F-sal-N-1,4,7,10)]Y (Y = PF6- for 1, Y = ClO4- for 2, Y = I- for 3 and Y = NO3- for 4) have been prepared. Single-crystal X-ray crystallographic studies show that complex 1 crystallizes in the orthorhombic Pna21 space group and complexes 2-4 have an isomorphous structure and crystallize in the same monoclinic space group, P21/n. Complexes 2-4 have two independent molecules (Fe1 and Fe2) in the unit cell. Magnetic susceptibility measurements demonstrated that complexes 1 and 3 showed a gradual one-step SCO behavior (T1/2 for 1 = 177 K and for 3 = 227 K) without thermal hysteresis. The magnetic behavior of 2 shows an incomplete two-step SCO process at T1/2 = 114 K and 170 K, respectively, while 4 is in a high-spin state at all measured temperatures. A careful evaluation of the supramolecular structures of these complexes revealed correlation between the supramolecular packing forces and their SCO behavior. The crystal structure of 1 consists of a three-dimensional (3D) extended network constructed from N-H⋯F and C-H⋯F hydrogen bonds, and C-H⋯π and C⋯C short contacts. In compounds 2-4, the crystal packing is governed by C⋯C, C-H⋯π and p-π interactions for the Fe1 centers and by C-H⋯π/O interactions for the Fe2 centers, which form 1D chains. Additional interactions (C-H⋯F and N-H⋯O/I) connect the neighboring chains and planes to form a complex supramolecular network. The anion⋯π interactions in 4 provide a means for preventing SCO occurring at low temperatures. This suggests that the supramolecular connectivity of the anions influences the magnetic properties.
Collapse
Affiliation(s)
- Zong-Mei Yu
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.
| | - Sheng-Ze Zhao
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.
| | - Yu-Ting Wang
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.
| | - Peng-Yu Xu
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.
| | - Chun-Yan Qin
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.
| | - Yong-Hua Li
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.
| | - Xin-Hui Zhou
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.
| | - Shi Wang
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.
| |
Collapse
|
2
|
Spitsyna N, Ovanesyan N, Blagov M, Krapivin V, Lobach A, Dmitriev A, Simonov S, Zorina L, Pilia L, Deplano P, Vasiliev A, Maximova O, Yagubskii E. Multi‐Magnetic Properties of a Novel SCO [Fe(3‐OMe‐Sal
2
trien)][Fe(tdas)
2
]·CH
3
CN Salt. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000873] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Nataliya Spitsyna
- Institute of Problems of Chemical Physics, RAS 142432 Chernogolovka MD Russia
| | - Nikolay Ovanesyan
- Institute of Problems of Chemical Physics, RAS 142432 Chernogolovka MD Russia
| | - Maxim Blagov
- Institute of Problems of Chemical Physics, RAS 142432 Chernogolovka MD Russia
- Lomonosov Moscow State University 119991 Moscow Russia
| | - Vladimir Krapivin
- Institute of Problems of Chemical Physics, RAS 142432 Chernogolovka MD Russia
| | - Anatolii Lobach
- Institute of Problems of Chemical Physics, RAS 142432 Chernogolovka MD Russia
| | - Alexei Dmitriev
- Institute of Problems of Chemical Physics, RAS 142432 Chernogolovka MD Russia
| | - Sergey Simonov
- Institute of Solid State Physics, RAS 142432 Chernogolovka MD Russia
| | - Leokadiya Zorina
- Institute of Solid State Physics, RAS 142432 Chernogolovka MD Russia
| | - Luca Pilia
- Dipartimento di Ingegneria Meccanica, Chimica e dei Materiali Università di Cagliari via Marengo 2, I 09123 Cagliari Italy
| | - Paola Deplano
- Dipartimento di Fisica INSTM Research Unit University of Cagliari Monserrato 09042 Cagliari Italy
| | - Alexander Vasiliev
- Lomonosov Moscow State University 119991 Moscow Russia
- National Research South Ural State University 454080 Chelyabinsk Russia
| | - Olga Maximova
- Lomonosov Moscow State University 119991 Moscow Russia
- National University of Science and Technology "MISIS" 119991 Moscow Russia
| | - Eduard Yagubskii
- Institute of Problems of Chemical Physics, RAS 142432 Chernogolovka MD Russia
| |
Collapse
|