Two Silver Coordination Network Compounds with Colorful Photoluminescence

Abstract

The excitation-wavelength-dependent photoluminescence (EWDP) property of flexible organic ligand 1,4-bis(2-methyl-imidazol-1-yl)butane (Bmib) was observed. Herein, Bmib was chosen as a bridge linker to react with AgX (X = Br and I) to synthesize novel coordination network compounds (CNCs) with interesting EWDP properties. As anticipated, under the same hydrothermal synthesis conditions, two new isomorphic CNCs, i.e. [Ag2(Bmib)Br2]∞ (IAM16-1) and [Ag2(Bmib)I2]∞ (IAM16-2), as the first examples of CNCs showing EWDP properties, have been obtained. The EWDP properties may be attributed to the stretch and rotation of the long -(CH2)4- chains of Bmib and the spatial orientation adjustment of the methyl group of each imidazole ring at different excitation wavelengths. It is a great challenge to point out the emission mechanisms of CNCs merely from the experimental results due to their multiple charge transfer routes. To address this issue, we adopt DFT calculations to pursue in-depth investigation of the emission mechanisms for IAM16-1 and IAM16-2, respectively.

A Series of Iodoargentates Directed by Solvated Metal Cations Featuring Uptake and Photocatalytic Degradation of Organic Dye Pollutants

“…For Ag3, it is linked by one μ 2 ‐I (I5) and three μ 3 ‐I ions (I2, I3 and I3A). The Ag‐( μ 2 ‐I) (2.782–2.800 Å), Ag‐( μ 3 ‐I) (2.861–2.969 Å) and Ag‐( μ 4 ‐I) (2.936–2.985 Å) bond lengths, and their corresponding I−Ag−I bond angles (103.0–121.9°) are consistent with those of the other reported iodoargentates . The argentophilic interactions could be observed in 1 as Ag⋅⋅⋅Ag distance is in the range of 3.038–3.312 Å (Figure b).…”

“…Moreover,p hotodegradation experiment indicates that compounds 1-3 can act as promising catalysts for the accelerated degradation of methyl violet (MV). [42,43] The argentophilic interactions could be observed in 1 as Ag···Ag distance is in the range of 3.038-3.312 ( Figure 1b). The Fe III ion is six-coordinated with ad istorted octahedral coordinationg eometry by six oxygen atoms from differentDMSO molecules.…”

Construction and Properties of Ag-I Polymeric Clusters Attach with Nitrogen Heterocyclic Transition Metal Moiety

“…The coordination environment of metallic Ag ions is shown in Table S6. The bond length range of Ag-I bond in compound 2 is 2.736-3.212 Å, which is similar to the bond length range of Ag-I bond (2.737-3.181 Å) reported in the literatures [40][41][42] . Two V shaped AgI 2 , three triangular pyramid con guration AgI 3 , one tetrahedral con guration AgI 4 , two triangular biconical con guration AgI 5 and two deformed pentagonal biconical con guration AgI 7 are connected by the sharing edges to form a "kite Shaped" Ag 10 I 11 building block.…”

“…The molecular structure includes S6. The bond length range of Ag-I bond in compound 1 is about 2.709-3.252 Å, which is similar to the bond length range of Ag-I bond 2.737-3.181 Å reported in the literatures [40][41][42] . Six tetrahedral AgI 4 and two triangular pyramid AgI 3 are connected by sharing edges to form Ag 8 I 12 building block of Ag cluster.…”

Tunable Luminescence in Hybrid Cu(I) and Ag(I) Iodides

“…20 In analogy to Cu(I), the closed-shell d 10 electronic configuration enables structural diversity in Ag(I) compounds, including clusters, chains, and layer motifs. [36][37][38][39][40] Recently, highly luminescent tunable white-light emitting phosphors through the replacement of Cu by Ag in iodide based hybrids have been reported. 41 Nevertheless Ag(I) halide based hybrids are relatively less investigated compared to the related Cu(I) analogues.…”