Studies of Er(iii)–W(v) compounds showing nonlinear optical activity and single-molecule magnetic properties

Abstract

Studies of {[Er(dma)5][W(CN)8]}n (1) showing nonlinear optical effect of second harmonic generation, and [Er(dma)5(H2O)2]·[W(CN)8]·dma·H2O (2) and [Er(dma)4(H2O)3]·[W(CN)8]·dma·3H2O (3) revealing field-induced single molecule magnet behavior.

Magnetic Properties and Second Harmonic Generation of Noncentrosymmetric Cyanido-Bridged Ln(III)–W(V) Assemblies

“…All reagents were placed in a water-free glovebox after vacuum drying at 100 °C for several hours to prevent the formation of new phases containing solvent mixtures. 38 The 0.05 M dma solutions of Ln(NO 3 ) 3 (4 mL) and Na 3 [W(CN) 8 ] (4 mL) were mixed and exposed to diethyl ether vapors in a closed container. After 2 days, the plate-shaped crystals were filtered and dried inside the glovebox.…”

“…The second-order NLO effects of PBAs with d-transition metal ions, second harmonic generation (SHG) in particular, are relatively well-known; however, lanthanide-based systems have not been thoroughly investigated. , To date, the majority of the research on second-order NLO effects has been limited to studies utilizing the harmonic light scattering (HLS) technique to measure the molecular quadratic hyperpolarizability, β HLS , which depends on the number of electrons. − Such variation in NLO properties has been explained by the polarization of 4f-electrons and not due to the increase in Lewis acidity along the lanthanide series. Furthermore, Wong et al reported the study of SHG as well as quadratic hyperpolarizability for compounds containing trans -cinnamic acid with the molecular formula [( trans -cinnamate) 3 Ln] n .…”

Modulating Two Pairs of Chiral DyIII Enantiomers by Distinct β-Diketone Ligands to Show Giant Differences in Single-Ion Magnet Performance and Nonlinear Optical Response

“…Although some examples of multifunctional CCs with the coexistence of SMM/SIM properties and SHG responses have been reported, − no such kind of CC with simultaneous SMM/SIM properties and THG responses has been documented so far. Especially, how to realize the regulation and switch of these functions is even more exciting.…”

Why Are Mixed Alkali Metal Cation Salts Formed? The [W(CN)6(bpy)]2– Case: Structural Study

“…In addition, the 6-cyanido anion modified with the bidentate ligand is extremely rigid, and its geometry is not influenced by the environment, making it a predictable building unit in crystal engineering. − The closest 8-coordinating cyanido relatives, the [M­(CN) 8 ] n − anions, (M = Mo, W, Nb) show relatively high geometric flexibility, which is connected with the low energy barrier between different coordination polyhedra. The presence of eight potentially bridging cyanido ligands and large charge [3– for Mo­(V) and W­(V)] makes them useful building blocks in the synthesis of coordination polymers. − Therefore, similar to previous studies, we also focus on the detailed structural characteristics of the first synthesized trimetallic compounds containing mixed alkali metal cations on the precursor [W­(CN) 6 (bpy)] 2–/– . We present the description of the synthesis and explain the scheme of creating a layered structure of the obtained systems in correlation with the bridging properties occurring in the structures of building units.…”