Title
Heteroleptic Chiral Bis(phthalocyaninato) Terbium Double-Decker Single-Ion Magnets
Author
Yuxiang Chen, Fang Ma, Yuehong Zhang, Luyang Zhao, Kang Wang, Dongdong Qi, Hao-Ling Sun, Jianzhuang Jiang
Year
2018
Journal
Inorganic Chemistry Frontiers
Abstract
For the purpose towards engineering the magnetic anisotropy, chiral binaphthyl substituents with slight electron-withdrawing ability and dibutylamino substituents with intense electron-donating nature are incoporated onto the periphery of each phthalocyanine ligand in bis(phthalocyaninato) terbium double-decker compound, resulting in the chiral heteroleptic bis(phthalocyaninato) terbium complex (R)/(S)-[Pc(OBNP)4]Tb{Pc[N(C4H9)2]8} (R/S-1) {Pc(OBNP)4 = {tetrakis(dinaphtho[1,2-e:1′,2′-g]-1,4-dioxocine)[2,3-b;2′,3′-k;2′′,3′′-t;2′′′,3′′′-c′]phthalocyanine}; Pc[N(C4H9)2]8 = [2,3,9,10,16,17,23,24-octakis(dibutylamino)phthalocyanine]}. Magnetic studies reveal the typical single-ion magnet (SIM) nature of this chiral bis(phthalocyaninato) terbium double-decker with spin reversal energy barrier of 638 K and butterfly-shaped magnetic hysteresis loop observed at even 25 K for R-1 under the sweep rate of 500 Oe/s. The performance of this SIM is well rationalized on the basis of theoretical analysis over the electrostatic potential according to the theoretical calculation using density functional theory method.
Instrument
J-1500
Keywords
Circular dichroism, Magnetic circular dichroism, Stereochemistry, Inorganic chemistry