Spin crossover(SCO)compounds are versatile platforms for incorporating functional ligands,enabling profuse magnetic regulating strategies and providing new likelihood for diversified practical applications of magneto-...Spin crossover(SCO)compounds are versatile platforms for incorporating functional ligands,enabling profuse magnetic regulating strategies and providing new likelihood for diversified practical applications of magneto-switches and information storage devices.Among the copious choices for stimuli-responsive ligands,diarylethene stands out as a photochromic unit that can be integrated into magnetic materials.Here,we report a triple interpenetrating SCO framework[Fe^(II)(Lo)_(2){Ag(CN)_(2)}_(2){Ag(CN)}_(2)](1,Lo=1,2-bis(2-methyl-5-(pyridin-4-yl)thiophen-3-yl)cyclopent-1-ene)with heterometallic nodes.Distinct from the conventional SCO frameworks in which Fe^(II) centers are directly bridged by organic ligands,the coordination fashion in 1 is manifested as Fe^(II)-Lo-Ag^(I)-Lo-Fe^(II).Photochromism is partially realized by the alternation of 365 nm and 520 nm light irradiation due to the tightly packed lattice.Subtle magnetic switching is observed from 1 to 1^(UV).Moreover,1^(UV) displays a photothermal response up to 162℃ under 808 nm light irradiation,with an enhancement in the photothermal conversion efficiency compared with that of 1.This thermally stable three-dimensional framework provides new structural possibilities for SCO polymers and takes a step forward in the assembly of UV-Vis-NIR responsive magnetic materials.展开更多
基金supported by the NSFC(Grant No.22488101)the Fundamental Research Funds for the Central Universities,Sun Yat-sen University(23ptpy73)Science and Technology Program of Guangzhou,China(2024A04J4433).
文摘Spin crossover(SCO)compounds are versatile platforms for incorporating functional ligands,enabling profuse magnetic regulating strategies and providing new likelihood for diversified practical applications of magneto-switches and information storage devices.Among the copious choices for stimuli-responsive ligands,diarylethene stands out as a photochromic unit that can be integrated into magnetic materials.Here,we report a triple interpenetrating SCO framework[Fe^(II)(Lo)_(2){Ag(CN)_(2)}_(2){Ag(CN)}_(2)](1,Lo=1,2-bis(2-methyl-5-(pyridin-4-yl)thiophen-3-yl)cyclopent-1-ene)with heterometallic nodes.Distinct from the conventional SCO frameworks in which Fe^(II) centers are directly bridged by organic ligands,the coordination fashion in 1 is manifested as Fe^(II)-Lo-Ag^(I)-Lo-Fe^(II).Photochromism is partially realized by the alternation of 365 nm and 520 nm light irradiation due to the tightly packed lattice.Subtle magnetic switching is observed from 1 to 1^(UV).Moreover,1^(UV) displays a photothermal response up to 162℃ under 808 nm light irradiation,with an enhancement in the photothermal conversion efficiency compared with that of 1.This thermally stable three-dimensional framework provides new structural possibilities for SCO polymers and takes a step forward in the assembly of UV-Vis-NIR responsive magnetic materials.
