Synthesis and Photophysical Properties of Emissive Silver(I) Halogenido Coordination Polymers Composed of {Ag₂X₂} Units Bridged by Pyrazine, Methylpyrazine, and Aminopyrazine

Abstract

Luminescent silver(I) coordination polymers having a {Ag 2 (μ-X) 2 } rhombic core (X = I, Br) were prepared using pyrazine (pyz), methylpyrazine (Mepyz), and aminopyrazine (ampyz) as bridging ligands. Photophysical measurements show that the complexes were strongly luminescent in the solid state at room temperature; further, the emissive excited state of the pyz and Mepyz complexes was a triplet charge-transfer ( 3 CT) excited state, similar to that of their copper(I) congeners, whereas that of the ampyz complex was a intraligand ( 3 IL) excited state. The energy of the 3 CT excited state of a silver halogenido complex was revealed to be ca. 5000 cm −1 higher than that of the corresponding copper complex.

AgX-based hybrid coordination polymers: mechanochemical synthesis, structure and luminescence property characterization

“…16,17 In the case of hybrid coordination polymers, the conductivity properties have been studied too. 22 Compounds and hybrid coordination polymers containing AgX are almost unexplored, but they can have argentophilic interactions, which cause a change in the emission process, leading to highly visible luminescence, [23][24][25] and in some cases, they show a thermochromic phenomenon directly related to the interaction between the metal centers. 26 As already said for Cu-based polymers, Ag-based compounds could also nd a great application in OLEDs, because of the interesting possibility of modulating the intensities and wavelengths of emission by varying the polymer structure, the binder and the used halide.…”

A new silver coordination polymer based on 4,6-diamino-2-pyrimidinethiol: synthesis, characterization and catalytic application in asymmetric Hantzsch synthesis of polyhydroquinolines

“…Furthermore, when compared to conventional mesostructured silica-based supports, the CPs ones have shown much higher activity and selectivity by providing good and regular interaction between metal species and organic reagents 24 , 25 . It has been found out that Ag-based CPs show high surface area and, as a result, a large number of reactions happen in presence of Ag–CP as catalyst 26 – 29 . Actually, in a number of cases, such reactions occur more proficiently and with more selectivity, as compared to the reactions carried out in presence of other types of heterogeneous nanomaterials.…”

Structural Diversity and Argentophilic Interactions in Small Phosphine Silver(I) Thiolate Clusters

“…Atomically precise control over the geometry and size of silver‐sulfur based clusters has attracted much attention [1–5] due to the importance of the structure‐property relationships [6–8] in the construction of novel materials for diverse applications such as catalysis, [9] sensing [10,11] and luminescence [12–15] . The assembly, geometry, and size, of silver chalcogenide and halide clusters is often influenced by auxiliary ligands [16–18] …”