Manipulating the spin crossover behaviour in a series of cyanide-bridged {(Fe2Fe2II)-Fe-III} molecular squares through NCE- co-ligands

You, Maolin1,2; Nguyen, Giang T.2; Shao, Dong1; Wang, Te1; Chang, Xiao-Yong1; Ungur, Liviu2; Zhang, Yuan-Zhu1

2022-03-01

10.1039/d2dt00058j

DALTON TRANSACTIONS   影响因子和分区

1477-9226

1477-9234

Manipulating the transition temperature (T-1/2) of spin-crossover (SCO) complexes capable of fulfilling practical criteria through different synthetic strategies is one of the main focuses in the field of molecular magnetism. The reaction of the tricyanometallate precursor [(Tp*)Fe-III(CN)(3)](-) and Fe(II) salt with the "facially" tridentate ligand tris(2-pyridyl)phosphine oxide (TPPO) and NCE- anions afforded three isostructural {(Fe2Fe2II)-Fe-III} square complexes {[(Tp*)Fe-III(CN)(3)](2)[Fe-II(TPPO)](2)[NCE](2)}center dot Sol (E = S, Sol = 2CH(3)OH center dot 6H(2)O, 1; E = Se, Sol = 2MeCN center dot 2CH(2)Cl(2)center dot 2H(2)O, 2; E = BH3, Sol = 4CH(3)OH center dot 2MeCN, 3). Detailed structural analysis, variable-temperature IR analysis, magnetic susceptibility measurements and DFT calculations revealed that all compounds exhibit complete and one-step SCO behaviour between the {Fe-2(III),Fe-LS(2)II,HS} and {Fe-2(III),Fe-LS(2)II,LS} electronic states. As the ligand field increases from NCS- to NCSe- to NCBH3-, T-1/2 shifts dramatically from 214 to 250 to 288 K for 1, 2 and 3, respectively, demonstrating another effective way to tune the SCO properties of the [Fe-III-CN-Fe-II] systems through the introduction of NCE- co-ligands.

SCI ; EI

英语

第一 ; 通讯

Stable Support Plan Program of the Shenzhen Natural Science Fund[20200925151834005] ; National Natural Science Foundation of China[21901108,22173043] ; National University of Singapore["R-143-000-A65-133","R-143-000-A80-114"] ; [11001278]

Chemistry

Chemistry, Inorganic & Nuclear

WOS:000771701900001

ROYAL SOC CHEMISTRY

20221511942041

Iron compounds ; Ligands ; Magnetic susceptibility ; Phosphorus compounds

Magnetism: Basic Concepts and Phenomena:701.2 ; Physical Chemistry:801.4 ; Chemical Products Generally:804

CHEMISTRY

Web of Science

1.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China
2.Natl Univ Singapore, Dept Chem, 3 Sci Dr 3, Singapore 117543, Singapore

You, Maolin,Nguyen, Giang T.,Shao, Dong,et al. Manipulating the spin crossover behaviour in a series of cyanide-bridged {(Fe2Fe2II)-Fe-III} molecular squares through NCE- co-ligands[J]. DALTON TRANSACTIONS,2022,51:5596-5602.

You, Maolin.,Nguyen, Giang T..,Shao, Dong.,Wang, Te.,Chang, Xiao-Yong.,...&Zhang, Yuan-Zhu.(2022).Manipulating the spin crossover behaviour in a series of cyanide-bridged {(Fe2Fe2II)-Fe-III} molecular squares through NCE- co-ligands.DALTON TRANSACTIONS,51,5596-5602.

You, Maolin,et al."Manipulating the spin crossover behaviour in a series of cyanide-bridged {(Fe2Fe2II)-Fe-III} molecular squares through NCE- co-ligands".DALTON TRANSACTIONS 51(2022):5596-5602.