Synthesis, Characterization, and Luminescent Properties of Silver(I) Complexes based on Diphosphine Ligands and 2,9‐Dimethyl‐1,10‐phenanthroline

Abstract

Five mono-nuclear silver(I) complexes with the ligand 2,9dimethyl-1,10-phenanthroline, namely [Ag(DPEphos)(dmp)]BF 4 (1), (4), and [Ag(dppb)(dmp)]NO 3 ·CH 3 OH (5) {DPEphos = bis[2-(diphenylphosphanyl)phenyl]ether, dppb = 1,2bis(diphenylphosphanyl)benzene, dmp = 2,9-dimethyl-1,10-phenanthroline} were characterized by X-ray diffraction, IR, 1 H NMR, 31 P NMR and fluorescence spectroscopy. Their terahertz (THz) time-

Synthesis, Characterization, and Luminescent Properties of Silver(I) Complexes based on Diphosphine Ligands and 6,7‐Dicyanodipyridoquinoxaline

“…Due to the difference of the diphosphine ligand, the Ag–P distances in complex 2 (2.417 Å and 2.503 Å) are longer than those in {[Ag(μ‐dppe)(dicnq)](BF 4 ) · (DMF)} n (2.399 Å and 2.438 Å). Meanwhile, the angle P–Ag–P (114.3°) in 2 is smaller than that in the complex above (140.0°) , The angle N–Ag–N (70.0°) in 2 is smaller than that in the complex [Ag(DPEphos)(dmp)]ClO 4 (71.4°) …”

“…Probably due to the different anion, the asymmetric unit in 1 consists of two crystallographic‐separate molecules forming two mono‐nuclear structures with AgP 2 N 2 coordination environment (Figure a), but the asymmetric unit in 2 only consists of one molecule (Figure a). Compared to the similar silver(I) complex early reported, the average Ag–P bond lengths of 2.455 Å and Ag–N bond lengths of 2.370 Å in complex 1 are distinctly shorter than in [Ag(DPEphos)(dmp)]NO 3 (average Ag–P 2.489 Å) and (average Ag–N 2.444 Å), which is assigned to the influence of the different N‐donor ligands.…”

“…When complexes 1 – 5 were excited at 318, 332, 332, 332, and 338 nm respectively, the corresponding emission peaks were at 406, 411, 408, 411, and 412 nm. In previous literature, the DPEphos and dicnq ligands are studied extensively by my co‐workers on their luminescent properties , , , . According to these literatures, the DPEphos ligand exhibits an emission signal centered at 435 nm with λ ex = 317 nm.…”

“…So we focused on studying the combined properties of these ligands. In our previous reports, we have obtained some complexes with the novel structure and good fluorescence properties by the reaction of similar ligands and closed‐shell d 10 metal …”

Synthesis and Photophysical Properties of Silver(I) Coordination Polymers Bridged by Dimethylpyrazine: Comparison of Emissive Excited States between Silver(I) and Copper(I) Congeners

“…Thus, following precedent luminescent copper compounds, various silver compounds have been prepared by applying the corresponding ligand combination, and in several cases, the silver complexes comprising the same coordination environment as that of the copper complexes have been obtained. − By expecting that these compounds should have a similar electronic structure, their photophysical properties have been examined. The findings revealed that several silver compounds exhibited luminescence related to the same ES as that of the copper congeners, whereas others either showed luminescence of different origin or were nonemissive. ,,− Because Ag 4d orbitals are more energetically stable than Cu 3d orbitals, the MLCT ES of Ag I complexes has higher energy than that of the corresponding Cu I complexes, resulting in the phosphorescence from LLCT or LC ESs for the Ag I complexes in contrast to the 3 MLCT emission of the Cu I complexes. ,,, Fluorescence from the ligand has also been observed when orbitals related to the Ag I center are adequately stable …”