Tuning the electron transfer events in a series of cyanide-bridged [Fe2Co2] squares according to different electron donors

Meng, Lingyi1; Deng, Yi-Fei1; Liu, Jianxun2; Liu, Yan Jun2; Zhang, Yuan-Zhu1

2022-09-01

10.1039/d2dt02416k

DALTON TRANSACTIONS   Impact Factor & Quartile

1477-9226

1477-9234

It has been recognized that both the ligand fields and intermolecular interactions may greatly impact the electron-transfer-coupled spin transition (ETCST) events in switchable magnetic materials; however, the engineering of these factors within a given system is still challenging. In this article, we chose the 4,4'-substituent 2,2'-bipyridine derivatives as chelating ligands according to their increasing electron-donating strength and incremental potential for forming hydrogen bonds (bpy(CHO,CH3)(L1) < bpy(CH2OH,CH3) (L2) < bpy(CH2OH,CH2OH) (L3)), and prepared three new [Fe2Co2] complexes, {[(Tp*)Fe(CN)(3)Co(L)(2)](2)[ClO4](2))center dot Sol (1, L = L1, Sol = 4MeCN center dot 2H(2)O; 2, L = L2, Sol = 3MeCN; 3, L = L3, Sol = 4MeOH; Tp* = hydrotris(3,5-dimethylpyrazol-1-yl)borate). X-ray crystallography studies revealed that all the complexes share similar cyanide-bridged [Fe2Co2] square compositions except for the different substituted groups of L ligands, which led to the clearly evidenced intercluster hydrogen bonds between the neighbouring hydroxyl groups in 2 and 3. As a result, 1 remained in the paramagnetic [(Fe2CO2II,HS)-C-III,LS] state over the whole temperature range, while 2 and 3 showed complete ETCST behaviour with the transition temperatures (T-1/2) being 221 and 294 K, respectively.

SCI ; EI

English

First ; Corresponding

Stable Support Plan Program of Shenzhen Natural Science Fund[20200925151834005] ; Guangdong Basic and Applied Basic Research Foundation[2022A1515011818] ; National Natural Science Foundation of China["21901108","22173043"]

Chemistry

Chemistry, Inorganic & Nuclear

WOS:000861228900001

ROYAL SOC CHEMISTRY

20224413017535

Cyanides ; Electron transitions ; Hydrogen bonds ; Ligands ; Magnetic materials ; X ray crystallography

Magnetic Materials:708.4 ; Physical Chemistry:801.4 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Crystal Lattice:933.1.1

CHEMISTRY

Web of Science

1.Southern Univ Sci & Technol SUSTech, Dept Chem, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol SUSTech, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China

Meng, Lingyi,Deng, Yi-Fei,Liu, Jianxun,et al. Tuning the electron transfer events in a series of cyanide-bridged [Fe2Co2] squares according to different electron donors[J]. DALTON TRANSACTIONS,2022.

Meng, Lingyi,Deng, Yi-Fei,Liu, Jianxun,Liu, Yan Jun,&Zhang, Yuan-Zhu.(2022).Tuning the electron transfer events in a series of cyanide-bridged [Fe2Co2] squares according to different electron donors.DALTON TRANSACTIONS.

Meng, Lingyi,et al."Tuning the electron transfer events in a series of cyanide-bridged [Fe2Co2] squares according to different electron donors".DALTON TRANSACTIONS (2022).