Design And Synthesis Of Conductive Ag-Cu Metal-Chalcogenolate Nanowire

As one of the important channels of inorganic–organic hybrid materials,the metal-chalcogenolate(M-S)interaction has attracted the attention of material scientists in the past decades.Compared with traditional organic materials and metallic inorganic materials,this kind of materials have many advantages in structure diversity and designability.And the excellent properties of these material such as electrical conductivity,magnetism,optical and catalysis make it possible to be used as new functional materials.Studies of these materials have focused on(1)the Self-Assembled Monolayers(SAMs),(2)the nanoparticles and nanoclusters,and(3)the coordination polymers.One dimensional metal–organic chalcogenide semiconductor nanowires have become the focus of attention due to their potential applications in sensing photonics and building complex electronic optoelectronic systems.In this paper,the direct synthesis method is used to obtain copper based low-dimensional nanomaterial with precise atomic structure,and its properties are explored,which can be divided into the following two parts:1.Through the one-pot synthesis method and liquid phase diffusion assembly crystallization,we have successfully synthesized the alloyed 1D MOC NW and obtained the single crystal of the NW.Its precise structure was successfully determined as[Ag_2.5Cu_1.5(S-Adm)₄]_n by X-ray single crystal diffraction.The electrochemical impedance behavior of the powder samples was studied,and the resistivity of the alloy NWs was determined to be 107?·m through calculations,while the pure silver NWs showed the characteristics of insulators,which provided a new ideas for the synthesis of conductive one-dimensional NWs.Thermo gravimetric analysis and variable temperature powder X-ray diffraction proved that the NW has good thermal stability and can be stored for a long time under environmental conditions.The scale-up experiment finally achieved a pot of gram-level synthesis,which proved this alloy NW have the possibility of industrial application.2.By using the same synthesis method and choosing different ligands(selenophenol and thiophenol),two Cu(I)clusters with completely different structures and photoluminescence behaviors were obtained:Cu₁₃(Se Ph)₁₃(PPh₃)₄ and Cu₈(SPh)₈(PPh₃)₄.After analysis,Se have more coordination modes and coordination capabilities than S,which may be the reason why the two clusters have completely different structures.After that,we focused on the photoluminescence thermo-chromic behavior of Cu₁₃ and Cu₈.After the temperature was reduced from 298 K to 80 K,the fluorescence intensity of Cu₁₃ clusters increased four times,and the emission center blue shifted 40 nm(from 720 nm to 680 nm).While the emission center of the fluorescence spectrum of Cu₈ blue-shifted by 35 nm at low temperature also produced a new emission peak,which showed a double emission at 80 K.It is worth noting that the temperature-dependent emission spectrum of I₅₆₀ nm:(I₅₆₀ nm+I₆₆₅ nm)has a linear correlation from 298 K to 80 K,which indicates that Cu₈ can be used as a potential temperature measurement material.