Ag(i) and Cu(i) cyclic-triimidazole coordination polymers: revealing different deactivation channels for multiple room temperature phosphorescences

Abstract

The photophysics of isostructural Ag(i) and Cu(i) 1D and 3D coordination polymers based on cyclic triimidazole reveals excitation wavelength-dependent multiple emissions with different radiative paths according to the coordinated metal.

Design and synthesis of new luminescent coordination networks of sql topology showing the highest degrees of interpenetration

“…64,65 In comparison to coordination compounds of Cu( i ) and Au( i ), those of Ag( i ) are less studied, mainly because of their photoinstability, although several luminescent silver( i ) complexes have been reported. 66,67…”

“…64,65 In comparison to coordination compounds of Cu(I) and Au(I), those of Ag(I) are less studied, mainly because of their photoinstability, although several luminescent silver(I) complexes have been reported. 66,67 Based on these premises, we investigated the emissive properties of the free ligand HL and of CNs 1 and 2 in the solid state at room temperature. Emission spectra are shown in Fig.…”

Exploring Cagelike Silsesquioxane Building Blocks for the Design of Heterometallic Cu4/M4Architectures

“…Coordination polymers have been the focus for many research groups due to their kaleidoscopic structural variety, − tunable functional properties, − and consequently a broad diversity of prospective applications. − A rational development of new catalytic systems based on coordination polymers with predesigned compositions and structures serves as one of the major trends in this chemistry. It is important that the design of catalysts involves a deliberate variation of many factors: e.g., (i) the nature of the metal ions, (ii) the ligands, and (iii) the synthesis conditions. − Along this line of thought, it should be emphasized that silsesquioxane (RSiO 1.5 ) n ligands are capable of forming differently shaped metal derivatives (cagelike metallasilsesquioxanes, CLMSs). − For many of them, a high catalytic activity was demonstrated. − On the other hand, examples of the directed formation of metallasilsesquioxane-derived coordination polymers remain very limited in the literature. − It is worth noting that there have been no documented attempts aimed at the catalytic activity evaluation for such types of coordination polymers.…”

Structural Landscape of Zn(II) and Cd(II) Coordination Compounds with Two Isomeric Triimidazole Luminophores: Impact of Crystal Packing Patterns on Emission Properties

“…Its positional isomer, L 2 , also revealed meaningful emissive properties in the solid state (λ max = 415 nm, Φ = 13%), associated with fast deactivation channels (in the nanosecond region) . Furthermore, thanks to its nitrogen atoms available for coordination to metal atoms, L 1 has been successfully employed for the preparation of Cu­(I) and Ag­(I) coordination networks where L 1 behaves as a mono-, bi-, and tridentate ligand, giving rise to one-, two-, and three-dimensional (1D, 2D, 3D) coordination polymeric networks of different topologies. , Very recently, L 1 and L 2 ligands have been used for the synthesis of Cu­(II) mononuclear and binuclear discrete complexes and 1D coordination polymers . On the other hand, our first attempts to obtain Zn­(II) or Cd­(II) coordination compounds with L 1 resulted in four inclusion compounds, where L 1 shows different aggregation stacking patterns, and the resulting compounds retain the emissive properties where the metal atom behaves as an external perturber .…”