Lanthanide Luminescence Improvement by Using a Functional Poly(Ionic Liquid) as Matrix and Co‐ligand

Li, Zhiqiang; Wang, Jin; Chen, Meng; Wang, Yige

doi:10.1002/asia.201501209

Cited by 26 publications

(11 citation statements)

References 25 publications

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“…A concurrent emission intensity enhancement of our probe solution upon increasing concentrations of DPA was observed. The emission intensity of 615 nm ( 5 D 0 → 7 F 2 transitions) gave rise to the most obvious changes in the emission spectrum (Figure b). More importantly, good linearity between the emission intensity of 615 nm and DPA concentration was obtained from 0 μM to 87.5 μM with R 2 = 0.9981 (Figure c).…”

Section: Resultsmentioning

confidence: 80%

A turn‐on luminescence probe for highly selective detection of an anthrax biomarker

et al. 2020

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Highly selective detection of Bacillus anthrax spores has attracted worldwide attention because Bacillus anthrax spores not only are harmful to the health of human beings and animals, but also can be used as biological warfare agents. Here, we report a simple platform by mixing EuCl 3 Á6H 2 O and sodium polyacrylate in aqueous solution and further investigate its luminescence response towards Bacillus anthrax biomarker dipicolinic acid (DPA) as a turn-on luminescence probe. Importantly, our probe has good sensitivity, lower detection limit, excellent selectivity as well as great anti-interference ability due to the great luminescence enhancement of Eu 3+ . Moreover, a test paper is constructed to realize the purpose of portable detection. These results indicate that our probe is an excellent candidate for sensing DPA. K E Y W O R D Santhrax biomarker, DPA, lanthanide, luminescence, turn-on

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Section: Resultsmentioning

confidence: 80%

A turn‐on luminescence probe for highly selective detection of an anthrax biomarker

et al. 2020

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“…Functional benzoic acid ligand with polymerizable vinyl and cationic imidazole salt (BA-vim) was designed and synthesized in one step. [9] Then, 2,6-pyridinedicarboxylic acid (PDA) was introduced as a second ligand to construct a ternary lanthanide complex (Eu(BA-vim) 3 PDA), whose chemical structure and purity were characterized by 1 H NMR spectroscopy and FTIR spectroscopy. As shown in 1 H NMR spectra (Figure 1A; Figures S1 and S2, Supporting Information), the ratio of hydrogen atoms (H i :H j ) in Eu(BA-vim) 3 PDA is 3:1, and the chemical shift of H i and H h on the benzene ring of BA-vim moved toward higher fields, meanwhile, the chemical shift of H j and H k on the benzene ring of PDA also moved toward high fields, which meant that both BA-vim and PDA coordinated with Eu 3+ successfully.…”

Section: Resultsmentioning

confidence: 99%

“…[10] Compared with the FTIR spectrum of Eu(BAvim) 3 , the asymmetric and symmetric COOgroup (1593 and 1402 cm -1 ) of Eu(BA-vim) 3 PDA underwent a red-shift, which indicated the coordination between Eu(BA-vim) 3 and PDA. [9,11] It is worth noting that the introduction of the second ligand PDA further increases the coordination number to resist the interference of water molecules. As shown in Figure S3 (Supporting Information), the Eu(BA-vim) 3 complex has almost no emission in aqueous solution, while Eu(BA-vim) 3 PDA maintains stable luminescence in aqueous solution.…”

Section: Resultsmentioning

confidence: 99%

Organic–Inorganic Hybrid Luminescent Hydrogel Glued by a Cationic Polymeric Binder

Niu

et al. 2021

Macromol. Rapid Commun.

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Luminescent hydrogels have shown great potential in many fields, such as lighting, display, imaging, and sensing, because of their unique optical properties, biocompatibility, and easy processing. Organic-inorganic hybrid self-assembly can not only enhance the hydrogels' mechanical strength, but also retain their self-healing ability. Herein, a luminescent supramolecular hydrogel is reported, which is formed via self-assembly of the negatively charged Laponite nanosheets and cationic lanthanide coordination polymer. The corresponding results reveal that the multiple binding interaction between Laponite and the polymeric binder is vital for improving the mechanical performance of the obtained luminescent supramolecular hydrogel.

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“…Negligible intensity of the intra‐4f 6 transition in the excitation spectrum indicates that an energy transfer occurs from the ligand to Eu 3+ ion. The corresponding emission spectrum consists of five sharp emission bands at 582, 594, 615, 650, and 694 nm, attributing to the 5 D 0 → 7 F J ( J = 0–4) transitions . The primary band at 615 nm is assigned to the 5 D 0 → 7 F 2 transition and responsible for the red emission.…”

Section: Methodsmentioning

confidence: 99%

Photoresponsive Luminescent Polymeric Hydrogels for Reversible Information Encryption and Decryption

et al. 2019

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Photoluminescent soft materials have been widely applied in sensing, display devices, and organic light-emitting diodes, [1] and also have received great attention toward security protection applications in information storage, date recording and encryption. [2] In particular, luminescent hydrogel-based 3D codes prepared in environmentally friendly process could not only increase the information density per unit area but also be employed as wearable or biological anti-counterfeiting materials. [3] On the other hand, the information recorded directly in these materials is usually visible under either ambient or UV light, which would hamper their practical applications in confidential information protection because these anti-counterfeiting labels could be easily mimicked. [4] In this context, smart luminescent materials that can perceive the surrounding stimuli and respond to them should be ideal for confidential information protection. [5] Under external stimuli, the luminescent outputs of these materials can be precisely modulated, preventing the information from being stolen or mimicked. [6,7] Stimulus-responsive luminescent materials that rely on constant addition of chemicals have been developed for information encryption and decryption. [8] Since these methods require invasive stimuli, it may be difficult for consumers without professional chemistry knowledge to handle the encoded information by adding chemicals. Therefore, it is highly desirable to develop alternative switchable luminescent materials with confidential encryption property capable of being easily operated in a noninvasive manner, where the security codes are initially invisible and become visible under specific external stimuli. In this way, reversible information encryption and decryption could be achieved. Light irradiation is an appealing external stimulus because it provides clean, spatiotemporal, and noninvasive control on the operation with high precision, [9] showing greater convenience in activating or erasing the code information as compared to other chemical stimuli. [10] In terms of emitting sources, lanthanide complexes are excellent emitting centers because of their intriguing optical properties, such as narrow emission bands, large Stokes shift, high luminescent efficiency, and long luminescence lifetime. [7,11] To the best of our knowledge, however, achieving Conventional luminescent information is usually visible under either ambient or UV light, hampering their potential application in smart confidential information protection. In order to address this challenge, herein, light-triggered luminescence ON-OFF switchable hybrid hydrogels are successfully constructed through in situ copolymerization of acrylamide, lanthanide complex, and diarylethene photochromic unit. The open-close behavior of the diarylethene ring in the polymer could be controlled by UV and visible light irradiation, where the close form of the ring features fluorescence resonance energy transfer with the lanthanide complex. The hydrogel-based block...

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Lanthanide Luminescence Improvement by Using a Functional Poly(Ionic Liquid) as Matrix and Co‐ligand

Cited by 26 publications

References 25 publications

A turn‐on luminescence probe for highly selective detection of an anthrax biomarker

A turn‐on luminescence probe for highly selective detection of an anthrax biomarker

Organic–Inorganic Hybrid Luminescent Hydrogel Glued by a Cationic Polymeric Binder

Photoresponsive Luminescent Polymeric Hydrogels for Reversible Information Encryption and Decryption

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