| Title | Effects of Counterions, Coordination Anions, and Coordination Solvent Molecules on Single-Molecule Magnetic Behaviors and Nonlinear Optical Properties of Chiral Zn2Dy Schiff Base Complexes |
| Authors | Liu, Cai-Ming Sun, Rong Wang, Bing-Wu Hao, Xiang Li, Xi-Li |
| Affiliation | Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, CAS Key Lab Organ Solids, Beijing 100190, Peoples R China Zhengzhou Univ Light Ind, Henan Prov Key Lab Surface & Interface Sci, Zhengzhou 450002, Peoples R China |
| Keywords | ION MAGNET CLUSTER COMPLEXES ZN-II RELAXATION LIGANDS DY CRYSTAL LUMINESCENCE ANISOTROPY TRINUCLEAR |
| Issue Date | Nov-2022 |
| Publisher | INORGANIC CHEMISTRY |
| Abstract | By changing the counterions (ClO4- and CF3SO3-) and the coordination anions (Cl- and Br-), we investigated their influences on the structures and performances of a class of Zn2Dy chiral single-molecule magnets (SMMs), which are based on a pair of chiral Schiff bases R,R-H2LSchiffand S,S-H2LSchiff {R,R-H2LSchiff = 2-((E)-((1R,2R)-2-((E)-2-hydroxy-3-methoxybenzylideneamino) cyclohexylimino)methyl)-6-me-thoxyphenol and S,S-H2LSchiff = 2-((E)-((1S,2S)-2-((E)-2-hydroxy-3-methoxybenzylideneamino)cyclohexylimino)methyl)-6-methoxyphenol}. Three pairs of chiral Zn2Dy Schiff base complexes were obtained by directed synthesis, which are [DyZn2(R,R-LSchiff)Cl2(H2O)](ClO4)center dot 0.5MeOH center dot 0.25H2O (R-1) and [DyZn2(S,S-LSchiff)Cl2(H2O)][DyZn2(S,S-LSchiff)Cl2(MeOH)](ClO4)2 center dot MeOH center dot 0.5H2O (S-1), [DyZn2(R,R-LSchiff)-Cl2(H2O)](CF3SO3)center dot 0.5MeOH (R-2) and [DyZn2(S,S-LSchiff)Cl2(H2O)]- [DyZn2(S,S-LSchiff)Cl2(MeOH)](CF3SO3)2 center dot MeOH (S-2), and [DyZn2(R,R-LSchiff)Br2(H2O)](CF3SO3)center dot 0.25MeOH (R-3) and [DyZn2(S,S-LSchiff)Br2(H2O)][DyZn2(S,S-LSchiff)Br2(MeOH)](CF3SO3)2 (S-3). They all exhibit good SMM behaviors, and their magnet relaxation is regulated by not only the counterions (ClO4- and CF3SO3-) but also the coordination anions (Cl- and Br-); these anions also have important effects on the second-harmonic generation (SHG) and third harmonic generation (THG) nonlinear optical properties. Interestingly, in the S-configuration complexes, the coordination solvent molecule of the Dy3+ ion on half of the molecules is the methanol molecule instead of the water molecule. This change in the coordinating solvent molecule can also significantly affect the SMM behaviors and the SHG and THG nonlinear optical properties. Moreover, ab initio calculations were applied to rationally explain the SMM properties. |
| URI | http://hdl.handle.net/20.500.11897/659126 |
| ISSN | 0020-1669 |
| DOI | 10.1021/acs.inorgchem.2c02743 |
| Indexed | SCI(E) |
| Appears in Collections: | å å¦ä¸ å å å·¥ç¨ å¦é ¢ 稀土材料化学与应用国家重点实验室 |
