Switchable slow relaxation of magnetization in photochromic dysprosium(III) complexes manipulated by a dithienylethene ligand was written by Kong, Ming;Feng, Xin;Li, Jing;Wang, Jia;Zhang, Yi-Quan;Song, You. And the article was included in New Journal of Chemistry in 2020.Electric Literature of C6H8S The following contents are mentioned in the article:
The photochromic and magnetic properties of two dithienylethene (DTE)-based complexes, [Dy(NO3)3(Lo)2(MeOH)] (1–o) and [Dy(NO3)3(Lo)3] (2–o) (Lo = 4,5-bis(2,5-dimethylthiophen-3-yl)-1,3-dimethyl-1,3-dihydro-2H-imidazol-2-one), were exptl. studied in detail with the help of theor. calculations Both complexes exhibit an instantaneous and strong reversible photochromic response to UV/visible irradiation, as evidenced from spectroscopic tests, and complex 1–o behaves as a typical field-induced single-mol. magnet (SMM). By controlling the reaction ratio of Lo and Dy(NO)3, Lo replacing a coordinated MeOH mol. in 1–o gave complex 2–o, whose single-mol. behavior is off. Upon irradiation with 254 nm light, the SMM properties of 1–o deteriorate with the energy barrier decreasing from 68.1 to 44.3 K while the magnetic dynamics of complex 2–o shows no response to irradiation Ab initio calculations reveal that the quantum tunnelling of magnetization between the ground Kramers doublets in 2–o is quite strong, leading to the disappearance of SMM behavior. For complex 1–o, the strong magnetic anisotropy and moderate quantum tunnelling of magnetization relative to 2–o give rise to an appropriate energy barrier for SMM. However, the decrease in energy barriers for 1–o after irradiation results from the weakening of magnetic anisotropy, which is caused by the stronger charge delocalization of the coordinated carbonyl O atom of the ring-closed DTE ligand. By regulating the reactant ratio, two photochromic DTE-based Dy(III) complexes were obtained and the SMM properties of complex 1–o can be tuned by the light-induced isomerization of the dithienylethene ligand. This study involved multiple reactions and reactants, such as 2,5-Dimethylthiophene (cas: 638-02-8Electric Literature of C6H8S).
2,5-Dimethylthiophene (cas: 638-02-8) belongs to benzothiophene derivatives. Benzothiophene finds use in research as a starting material for the synthesis of larger, usually bioactive structures. The different substitution patterns in these heterocycles offer new opportunities for drug discovery and other applications in materials science.Electric Literature of C6H8S
Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem