X-Ray structural and photoluminescence spectroscopic investigation of the europium octamolybdate polymer Eu₂(H₂O)₁₂[Mo₈O₂₇]·6H₂O and intramolecular energy transfer in the crystalline lattice

The Hydrothermal Synthesis of Transition Metal Complex Templated Octamolybdates

“…A similar metal coordination to the molybdate chain has been found previously in the case of rare-earth metals like samarium [43] and europium. [44] However, this is the first example of a transition metal organic complex coordinating with the chain. The structure is also special as the same organic group occurs as the counter cation as well as a coordinating unit during self-assembly.…”

Highly Resolved Luminescence Measurements for Traces of 1,3-Dibetanato Europium(III) and Terbium(III) Complexes Using a Microscope Laser Raman Spectrometer toward the Forensic Discrimination

“…The ligandcentered absorption band was detected as the strongest band with a broad bandwidth at the region of the UV wavelength. Sharp bands were observed at the region of the visible wavelength and assigned to the 4f → 4f* electronic transitions of metal-centered absorption bands: 7 F0 → 5 D2, 7 F0 → 5 D1, and 7 F1 → 5 D1 bands at about 465, 526, and 534 nm in the spectrum of the Eu 3+ complex, 9 respectively, and the 7 F6 → 5 D4 band at about 486 nm in that of the Tb 3+ complex. 14 ligand-centered absorption band and the metal-centered absorption bands listed in Table 1.…”

“…In the spectra of powdered complexes, metal-centered absorption bands assigned to the 4f → 4f* electronic transitions are easily observed in the visible wavelength region. 9 The luminescence of those complexes is emitted with visible excitation at wavelengths of the 4f → 4f* electronic transitions. , respectively.…”

Investigation on fluorescence properties of ultrafine PVA fiber mats‐contained polyoxometalate with different molecular structure

“…The excitation spectra of Eu-POMs solid exhibit strong characteristic peaks of Eu 3þ and a week broad band in ultraviolet region, which correspond to the ligand-metal charge transfer (LMCT) within polytungstate ligand. [26][27][28] However, the excitation spectra of Eu-POMs/PVA ultrafine fiber mats at room temperature only exhibit a strong broad band in ultraviolet region. Compared with the broad band, the characteristic bands of Eu 3þ are so weak that hardly can be detected.…”