Luminescent sol–gel materials based on lanthanide aminopolycarboxylates (Ln = Nd, Eu, Tb, Yb)

Fadeyev, E. N.; Smola, S. S.; Snurnikova, O. V.; Korovin, Oleksandr; Русакова, Н. В.

doi:10.1007/s10971-012-2946-9

Cited by 6 publications

(4 citation statements)

References 19 publications

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“…Terbium, however, exhibited a 45% reduction in fluorescence intensity. 20 Figure 9 presents the fluorescence emission intensity of the PVA fluorescent gel with different Eu 3+ :Tb 3+ ratios by controlling the reaction time and reaction concentration. It is shown that the fluorescence intensity of Eu 3+ first decreased and then increased with the addition of Tb 3+ when the water content remained unchanged.…”

Section: Fluorescence Spectramentioning

confidence: 99%

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Preparation of PVA Fluorescent Gel and Luminescence of Europium Sensitized by Terbium (III)

Wei

Zhao

et al. 2020

Polymers

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Polyvinyl alcohol (PVA) gel has a very wide range of applications in agriculture, military, industry, and other fields. As a widely used water-soluble polymer, PVA has good mechanical properties, excellent spinnability, good hydrophilicity, remarkable physical and chemical stability, good film formation, is non-polluting, and exhibits good natural degradation and biocompatibility. It is an ideal gel preparation material. Incorporation of rare-earth elements into PVA polymers can be used to prepare rare-earth luminescent gel materials. Results show that the luminescent efficiency of complexes is mainly related to their structure, ligand substituents, synergists, and the electronic configuration of doped rare-earth ions. Fluorescent gel films were prepared by adding europium, terbium, and europium/terbium co-doped into PVA, and their fluorescence properties were compared and analyzed. It was found that, in addition to the above factors, the sensitization of terbium to europium, and the fluorescence-quenching effect of hydroxyl groups, will influence the fluorescence properties. This has opened a new route for the application of rare-earth materials and may have value in the field of new materials.

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Section: Fluorescence Spectramentioning

confidence: 99%

“…Other scientific experiments have shown that the tetratetralorthosilprivate can be used as the matrix to prepare the gel. The process of preparing the gel is extremely complicated, require many drying steps, and takes a long time [20]. By contrast, the preparation of PVA gels, which require only natural cooling is simple.…”

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confidence: 99%

Preparation of PVA Fluorescent Gel and Luminescence of Europium Sensitized by Terbium (III)

Wei

Zhao

et al. 2020

Polymers

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“…Fluorescent hydrogels combine fluorescent materials into the three‐dimensional network skeleton of hydrogels and incorporate them through covalent or noncovalent interactions so that they exhibit the dual characteristics of gel and fluorescence at the same time 1,2 . According to the different fluorescence groups, they can be divided into organic fluorophores, 3,4 quantum dots, 5–8 lanthanide ions, 9–11 and others. These fluorescence groups are introduced into the hydrogel matrix to prepare fluorescent composite hydrogels with high luminous efficiency and high quantum yield.…”

Section: Introductionmentioning

confidence: 99%

An efficient strategy to design and construct high‐strength and fluorescence poly(vinyl alcohol) hydrogels via freeze–Thaw cycles

Li,

Wu,

Chen

et al. 2023

J of Applied Polymer Sci

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Fluorescent hydrogels are soft materials that can emit light under certain conditions, which makes them attractive for biomedical and engineering applications. Nevertheless, one of the major challenges in developing fluorescent hydrogels is their low mechanical properties. To overcome this challenge, we have developed an efficient method for preparing high‐strength and fluorescence hydrogels via freeze–thaw cycles. This approach offers a promising solution to enhance the mechanical properties of fluorescent hydrogels, which could broaden their applications in various fields. We used polyvinyl alcohol (PVA) as the main component and added 2,4,6‐tri(4‐aminophenyl) triazine (TAPT) as a rigid fluorescent substance. We find that these hydrogels have higher strength than conventional PVA hydrogels. These hydrogels exhibit strong fluorescence. Hydrogen bonds and π‐π stacking between NH2 and PVA construct the network structure. The composite hydrogel has significant mechanical properties, with a maximum tensile strength of 44.7 MPa, maximum elongation at break of 310.1% and Young's modulus of 138.5 MPa. Compared with the PVA hydrogel, the tensile strength and elongation at break of the hydrogel with the addition of 2% TAPT are increased by 292.6% and 153.0%, respectively. TAPT molecules are bound to the inside of the gel network, which makes the composite hydrogels have strong fluorescence. These hydrogels with high strength and fluorescence have a wide range of applications in flexible electronics and information displays.

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“…Researchers have a great interest in rare earth organic complexes due to their unique fluorescence properties and promising applications as fluorescence probes and laser materials. [1][2][3][4][5][6][7] Due to the fact that lanthanide ions themselves exhibit low molar absorptivity, the design of complexes between them and organic ligands that absorb light and transfer the energy to the metal center (antenna effect) is a common practice. [8,9] The increase in the absorptivity of the ligand generally improves the luminescence intensity of the complex.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Chemistry for the Host Sol‐Gel Glass via the Energy Transfer Fluorescence of Encapsulated Organic‐Tb(III) Complexes

Zaitoun

2019

ChemistrySelect

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Fluorescence of organo‐terbium complexes have been investigated as a function of the matrix composition using two sol‐gel derived hosts: (a) matrix 1, an alkoxysilane Si (OR)4, where all the coordinated OR groups associated with silicon hydrolyze in water and (b) matrix 2 with an organoalkoxysilane, R’‐ Si (OR)3 which consists of organic R’ groups that don't hydrolyze. The synthesized organo‐Tb(III) complexes, namely: Tb(III) dithiocarbamate‐Tb(L1)3B [L1=(R)2NCS2B, R=C2H5 and B=1,10‐phenanthroline] and Tb(III) complex with the polytonic ligand L2=N’, N’2‐bis[(1E)‐1‐2‐(pyridyl)ethylidine]ethanedihydrazide Tb2‐L2‐(CH3COO)2; L2=C16H16 N6O2) were in situ encapsulated in the sol‐gel glass hosts matrices, 1 and 2. Tb luminescence was shown to depend largely on (i) the ligand surrounding Tb ions, and (ii) chemistry or nature of the sol‐gel host matrix.

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Luminescent sol–gel materials based on lanthanide aminopolycarboxylates (Ln = Nd, Eu, Tb, Yb)

Cited by 6 publications

References 19 publications

Preparation of PVA Fluorescent Gel and Luminescence of Europium Sensitized by Terbium (III)

Preparation of PVA Fluorescent Gel and Luminescence of Europium Sensitized by Terbium (III)

An efficient strategy to design and construct high‐strength and fluorescence poly(vinyl alcohol) hydrogels via freeze–Thaw cycles

Investigation of the Chemistry for the Host Sol‐Gel Glass via the Energy Transfer Fluorescence of Encapsulated Organic‐Tb(III) Complexes

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