Reversible On-Off Switching of a Single-Molecule Magnet via a Crystal-to-Crystal Chemical Transformation

Wu, Dong-Qing1; Shao, Dong1; Wei, Xiao-Qin1; Shen, Fu-Xing1; Shi, Le1; Kempe, David2; Zhang, Yuan-Zhu3; Dunbar, Kim R.2; Wang, Xin-Yi1

2017-08-30

10.1021/jacs.7b07008

Journal of the American Chemical Society   影响因子和分区

0002-7863

Dynamic molecular crystals are of high interest due to their potential applications. Herein we report the reversible on-off switching of single-molecule magnet (SMM) behavior in a [Mo(CN)(7)](4-) based molecular compound. Upon dehydration and rehydration, the trinuclear Mn2Mo molecule [Mn(L)(H2O)](2)[Mo-(CN)(7)]center dot 2H(2)O (1) undergoes reversible crystal-to-crystal transformation to a hexanuclear Mn4Mo2 compound [Mn(L)(H2O)](2)[Mn(L)](2)[Mo(CN)(7)](2) (2). This structural transformation involves the breaking and reforming of coordination bonds which leads to significant changes in the color and magnetic properties. Compound 1 is an SMM with an energy barrier of 44.9 cm(-1), whereas 2 behaves as a simple paramagnet despite its higher ground state spin value. The distortion of the pentagonal bipyramidal geometry of [Mo(CN)(7)](4-) in 2 disrupts the anisotropic exchange interactions that lead to SMM behavior in 1.

SCI ; EI

英语

NI期刊

通讯

NSF of Jiangsu province[BK20150017]

Chemistry

Chemistry, Multidisciplinary

WOS:000409286000020

AMER CHEMICAL SOC

20173604125191

Ground state ; Magnets ; Molecular crystals ; Molecules

Manganese and Alloys:543.2 ; Atomic and Molecular Physics:931.3 ; Crystalline Solids:933.1

Web of Science

1.Nanjing Univ, Sch Chem & Chem Engn, Collaborat Innovat Ctr Adv Microstruct, State Key Lab Coordinat Chem, Nanjing 210023, Jiangsu, Peoples R China
2.Texas A&M Univ, Dept Chem, College Stn, TX 77840 USA
3.South Univ Sci & Technol China, Dept Chem, Shenzhen 518055, Peoples R China

Wu, Dong-Qing,Shao, Dong,Wei, Xiao-Qin,et al. Reversible On-Off Switching of a Single-Molecule Magnet via a Crystal-to-Crystal Chemical Transformation[J]. Journal of the American Chemical Society,2017,139(34):11714-11717.

Wu, Dong-Qing.,Shao, Dong.,Wei, Xiao-Qin.,Shen, Fu-Xing.,Shi, Le.,...&Wang, Xin-Yi.(2017).Reversible On-Off Switching of a Single-Molecule Magnet via a Crystal-to-Crystal Chemical Transformation.Journal of the American Chemical Society,139(34),11714-11717.

Wu, Dong-Qing,et al."Reversible On-Off Switching of a Single-Molecule Magnet via a Crystal-to-Crystal Chemical Transformation".Journal of the American Chemical Society 139.34(2017):11714-11717.