Synthesis, crystal structure and luminescent properties of lanthanide extended structure with asymmetrical dinuclear units based on 2-(methylthio)benzoic acid

Estimating the Individual Spectroscopic Properties of Three Unique EuIII Sites in a Coordination Polymer

“…This complex crystallizes in the triclinic space group P 1̅, as a coordination polymer with unit cell dimensions a = 12.4899(15), b = 16.326(2), and c = 25.059(3) Å, α = 84.271(3), β = 84.832(3), and γ = 68.585(3)° and V = 4725.2(10) Å 3 . Although one or two different sites for Ln III ions are often encountered for complexes containing benzoic acid and its derivatives, − here there are three unique Eu III coordination sites, as shown in Figure , with the three unique Eu III ions bridged by κ 2 -O-3,5-dichlorobenzoato anions.…”

“…However, when the system has two or more unique Eu III coordination sites, this procedure leads to inconsistent results because the experimental JO intensity parameters cannot be determined for each unique metal ion and its coordination polyhedron and this fact precludes the individual theoretical adjustment. Thus, the known theoretical studies involve monometallic complexes. , While Wen et al successfully used complete-active-space self-consistent field energies and wave functions to extract the crystal-field parameters of Ce III in solids and molecules, the analysis of larger systems requires long computation times and therefore examples of systems containing more than one unique Ln III , such as some dimers or coordination polymers, remain scarce. , …”

“…34,36 While Wen et al successfully used complete-activespace self-consistent field energies and wave functions to extract the crystal-field parameters of Ce III in solids and molecules, 43 the analysis of larger systems requires long computation times and therefore examples of systems containing more than one unique Ln III , such as some dimers or coordination polymers, remain scarce. 44,45 To overcome this limitation, Freire and co-workers proposed three strategies to calculate the luminescence properties in a system containing two or more different Eu III coordination sites, namely, the centroid method, the individual polyhedron method (IPM), and the overlapped polyhedra method (OPM). 44 In the centroid method, the Eu III centers are replaced by a centroid, a dummy atom located at the midpoint between the ions.…”

Tuning the Thermometric Features in 1D Luminescent EuIII and TbIII Coordination Polymers through Different Bridge Phosphine Oxide Ligands

“…Although several examples regarding ion–ion ET in heteronuclear Ln III systems have been found so far, − ,− few of them discuss the ET dependence as a function of ion–ion separation/chain conformation as well as the excitation channel (i.e., direct ligand excitation and/or Ln III direct excitation). In this context, to address such issues, this study deals with the synthesis of two one-dimensional (1D) coordination polymers, represented by the general formula [Tb­(tfaa) 3 (μ-L)­Eu­(tfaa) 3 ] n , by using tfaa – (trifluoroacetylacetonate) as the main luminescent antenna ligand, and μ-L ([(diphenylphosphoryl)­R]­(diphenyl)­phosphine oxide, R = ethyl – dppeo – or butyl – dppbo) as bis-phosphine oxide bridging ligands.…”

Photon Conversion and Radiation Synergism in Eu/Tb Complexes Incorporated Poly Methyl Methacrylate

“…Recently, investigations have been reported on the efficient fluorescence generated in lanthanide (Ln) ions incorporated TiO 2 as photoelectrode, which are deemed to be a new route for high-quality conversion efficiency in DSSCs [7][8][9]. Ln ions can enhance light harvesting via converting UV and near infrared (NIR) radiation to visible emission, so that the conversion efficiency of solar cells will be improved effectively [10][11][12][13][14][15][16][17][18][19][20][21].…”