A bifunctional luminescent Tb(III)-metal-organic framework by a tetracarboxylate ligand for highly selective detection of Fe3+ cation and Cr2O72- anion

Design of “turn-off” luminescent Ln-MOFs for sensitive detection of cyanide anions

“…7a), revealing that the detection mechanism is not an energy-competitive absorption. 76 The geometry optimization and orbital diagrams, including the lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) energies of the H 2 DBTA and NaCN, were calculated by density functional theory (DFT) via the Gaussian09 D.01 software package using the B3LYP/6-31G(d, p) basis set method. 77 As shown in Fig.…”

Excitation‐Wavelength‐Dependent Luminescence of Chemically and Physically Mixed Europium and Terbium Phosphonates: Color‐Tunable Luminescence, Near‐White‐Light Emission, and Selective Fe3+ Detection

“…In addition, quantitative titration experiments conducted in the low Fe 3 + concentration range 0-0.010 mM gave the DL value of 0.42 μM, which is lower than or similar to that of Ln-based luminescence chemsensors reported in literature (Table S4). [3][4][5]16,[24][25][26][27][28][29] The reusability of TbP as luminescence chemsensor for Fe 3 + sensing was examined. After each run of sensing, TbP was recovered by filtration, washed with H 2 O, and dried in air.…”

“…[17][18][19][20][21][22][23] Therefore, Ln-MOFs with different luminescent natures of Ln 3 + , linkers, or other species have advanced in luminescence detection of certain environmental contaminants, such as Fe 3 + . [3][4][5][24][25][26][27][28][29][30][31][32][33] On the other hand, lanthanide ions have similar ionic radii and chemical activities, therefore, different luminescence proportions of lanthanide ions such as Sm 3 + , Eu 3 + , Tb 3 + , Dy 3 + , and Gd 3 + ions would be added to the same reaction systems to obtain mixed-Ln materials. For these mixed-Ln materials, energy transfer between different Ln 3 + ions may occur to fine-tune the luminescence of the Ln 3 + ions.…”

“…Lanthanide based materials have received continue attentions due to the fact that trivalent lanthanide ions (Ln 3 + ) possess intrinsically luminescent features of large Stokes shift, bright visible-light emission, and long lifetime. [1][2][3][4][5] Moreover, the particular color emission with line-like narrow emissions of 4 f-4 f transitions leads to high color purity. [4][5][6] For example, Eu 3 + ion usually emits in the red region of the visible spectrum originated from the characteristic 5D 0 !7F j (j = 0, 1, 2, 3, 4) transitions, whereas the Tb 3 + ion generally emits green emission from the characteristic 5D 4 !7F j (j = 3, 4, 5, 6) transitions.…”

Polyiodine-Modified 1,3,5-Benzenetricarboxylic Acid Framework Zn(II)/Cd(II) Complexes as Highly Selective Fluorescence Sensors for Thiamine Hydrochloride, NACs, and Fe3+/Zn2+

“…Furthermore, zinc and iron are two kinds of trace elements that are indispensable to the human body; they have physiological functions such as promoting the growth and development of the human body and enhancing its immunity. However, the excessive intake of these two ions may cause serious harm to the body; excessive consumption of zinc can cause vomiting, headache, diarrhea, convulsions, etc., − and iron poisoning can occur when an excess of iron is ingested. − Moreover, the large-scale utilization of these two ions in industrial production also causes serious environmental pollution problems. Therefore, selective detection of zinc and iron ions is essential for biology and environmental fields.…”