Photoluminescent Investigation of the Doping Site of Eu3+-Doped [Zn3(BTC)2∙12H2O] Metal-Organic Framework Prepared by Microwave-Assisted Hydrothermal Synthesis

Sensitive luminescent chemosensing of fluoride based on Eu-doped Zn-LMOF in aqueous media: structural and spectroscopic studies

“…Similar photophysical features with emission bands in the range of 360–440 nm have been reported previously for several Zn( ii )–benzenemulticarboxylates-based MOFs and are attributed to ligand-to-metal charge transfer (LMCT) in combination with intraligand transitions (IL). 19,28–30,77…”

“…Similar photophysical features with emission bands in the range of 360-440 nm have been reported previously for several Zn(II)-benzenemulticarboxylates-based MOFs and are attributed to ligand-to-metal charge transfer (LMCT) in combination with intraligand transitions (IL). 19,[28][29][30]77 Upon excitation at 260 nm of Eu@Zn-LMOF, the characteristic emission bands corresponding to the f-f transitions ( 5 D 0 → 7 F J , J = 1-4) of the Eu(III) ions are observed (Fig. 5A).…”

“…[25][26][27][28] The doping of Zn-MOFs derivatives with lanthanides, in particular with Eu(III) ions, improves the emission properties owing to the antenna effect, in which the excitation with UV radiation is absorbed by the π-conjugated organic linker and transferred from the triplet state (intersystem crossing S 1 → T 1 ) to the Eu(III) doping ions, frequently with a red/pink-color emission in the microsecond range. 16,[29][30][31][32] These Eu-doped Zn-MOF-based composites have spawned a new subclass of color-emitting phosphors with applications in OLEDs 29,30,33,34 and optical sensing of nitrobenzene-based explosives, 32,35 metal ions, 36,37 UV radiation, 38 temperature, 39 and O 2 . 40 However, direct anion sensing still remains largely unexplored.…”

“…The doping of Zn-MOFs derivatives with lanthanides, in particular with Eu( iii ) ions, improves the emission properties owing to the antenna effect, in which the excitation with UV radiation is absorbed by the π-conjugated organic linker and transferred from the triplet state (intersystem crossing S 1 → T 1 ) to the Eu( iii ) doping ions, frequently with a red/pink-color emission in the microsecond range. 16,29–32…”

“…These Eu-doped Zn-MOF-based composites have spawned a new subclass of color-emitting phosphors with applications in OLEDs 29,30,33,34 and optical sensing of nitrobenzene-based explosives, 32,35 metal ions, 36,37 UV radiation, 38 temperature, 39 and O 2 . 40 However, direct anion sensing still remains largely unexplored.…”