RSC Advances
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2016
·Vol. 6
·期 34
·28165-28170
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IF 3.289
Xiang Shen,Bing Yan
A zinc-based anionic metal–organic framework, [HDMA]2[Zn2(BDC)3(DMA)]·6DMF (HDMA+: dimethylammonium, BDC2−: 1,4-benzenedicarboxilate, DMA: dimethylamine and DMF: N,N′-dimethylformamide) has been solvothermally synthesized. And its cations, HDMA+, are exchanged by various lanthanides to form the hybrid systems via a post-synthetic process. These lanthanide(III)-loaded materials have shown different luminescent behaviors, indicating that this kind of anionic MOF could effectively sensitive lanthanides and be used as a potential luminescent probe towards different lanthanide ions. Besides, this system exhibits selective adsorption ability to cationic dyes, such as Rhodamine B, Basic Red 2 and Methylene Blue. RhB@1 has a fastest selection and realizes the probing of various organic solvent molecules as well as volatile organic benzenes (VOBs), especially for sensing acetone and aniline.
研究领域:
材料科学
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化学
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分析化学
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DOI
高影响因子
Polymers
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2022
·Vol. 14
·期 10
·1997
·
IF 4.967
Tong Chen,Sanping Zhao
An effective strategy was developed to fabricate novel lanthanide ions–pyromellitic acid–methoxy poly(ethylene glycol) (Ln-PMA-MPEG) nano-assemblies. The amphiphilic partially esterified derivative (PMA-MPEG) of pyromellitic acid with methoxy poly(ethylene glycol) was designed and synthesized via the coupling reaction. Ln-PMA-MPEG nano-assemblies were rapidly fabricated using PMA-MPEG as a polymer ligand with Eu3+ions or mixed Eu3+/Tb3+ions through biomimetic mineralization in neutral aqueous systems. The size of the as-prepared materials could be designed in the range 80–200 nm with a uniform distribution. The materials were readily dispersed in various solvents and displayed visible color variations and different photoluminescent properties for solvent recognition. The mixed Eu/Tb-PMA-MPEG nanomaterials were investigated as ratiometric sensors for the detection of trace water in DMF and Fe3+ions in aqueous solutions. The sensor materials can quantitatively detect trace water in DMF from 0% to 10% (v/v). The resultant materials also display a strong correlation between the double luminescence intensity ratios (ITb/IEu) and Fe3+concentration, with a good linear detection concentration in the range of 0–0.24 mM and a limit of detection of 0.46 μM, and other metal ions did not interfere with the sensing mechanism for Fe3+ions. The novel nano-assemblies have potential applications as ratiometric fluorescent nanosensors in the chemical industry as well as in biomedical fields.Keywords:metal–organic frameworks;biomimetic mineralization;luminescent properties;fluorescent nanosensors
研究领域:
材料科学
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生物医学工程
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化学
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DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
·
2023
·
IF 4.9
He Shao,Lifang Li,Xiufeng Wu,Lin Xu,Biao Dong,Donglei Zhou,Xue Bai,Hongwei Song
The toxicity of lead ions has become the severe challenge for the all-inorganic lead halide perovskite materials, although some works have reported the lead-free perovskite nanocrystals (NCs), the photoluminescence quantum yield (PLQY) of these materials is still not unsatisfactory. Meanwhile, because the halogen ions can be easily exchanged, the controllable multicolor emission in perovskite NCs is difficult to realize in current reports. In this work, we introduced lanthanide ions into lead-free Cs 3 Sb 2 Cl 9 perovskite NCs. Benefitting from the energy transfer between Cs 3 Sb 2 Cl 9 perovskite NC host and lanthanide ions, the multicolor emission was realized. Based on controlling the doping concentration of Tb 3+ and Eu 3+ ions, the white light emission under UV excitation would be turned easily in the Tb 3+ /Eu 3+ codoped NCs. In addition, efficient energy transfer from perovskite NCs to Tb 3+ or Eu 3+ ions is beneficial to improving the optical properties of lead-free perovskite NCs, resulting in maximum PLQYs of red, green and white light emission of 22.6%, 19.7% and 28.5%, respectively. Finally, a white light emitting device (WLED) was fabricated with a power efficiency of 18.5 lm/W, which presents the Commission Internationale de l’Eclairage (CIE) of (0.33, 0.35).
研究领域:
材料科学
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光学
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DOI
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 19
·9353-9359
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IF 7.233
Huhui Fu,Pengfei Peng,Renfu Li,Caiping Liu,Yongsheng Liu,Feilong Jiang,Maochun Hong,Xueyuan Chen
A local structure around lanthanide (Ln3+) emitters in Ln3+-doped upconversion nanocrystals (UCNCs) is of fundamental importance in tailoring their upconversion luminescence (UCL) features. However, a general strategy responsible for the local-structure-dependent UCL in Ln3+-doped UCNCs has not been conclusively established to date. Herein, we report a new class of alkaline zirconium fluoride-based Yb3+/Er3+ co-doped UCNCs featuring a diversity of crystallographic structures for Ln3+ ion doping, which thereby allow us to thoroughly understand the origin underlying the local-structure-dependent UCL of the Er3+ ion for the first time. We reveal that the high-symmetry crystal lattice of Yb3+/Er3+ co-doped UCNCs may incur the large UCL red-to-green intensity ratio of Er3+ regardless of their identical elemental compositions. In combination with the first-principles calculations, we show that such local-structure-dependent UCL of Er3+ is primarily due to the varied electronic band structures induced by the Yb3+/Er3+ doping in different crystallographic structures of alkaline zirconium fluorides. These findings may open up a new avenue for constructing high-quality UCNCs with a tailored UCL profile and lifetime for diverse applications.
研究领域:
材料科学
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光学
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DOI
PubMed
高影响因子
POLYMER
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2022
·
IF 4.432
Liang Chen,Yuanzhi Cui,Wenshan Ren
In modern society, information leakage is a very important issue during our dairy life. Multi-dimensional information encryption and storage are effective ways to increase the security level. Herein, a serials of rapidly stimuli-responsive, tough fluorescent hydrogels have been fabricated by doping Ln 3+ ions (Ln = Eu, Tb, Eu/Tb) into poly( N -acryloyl glycinamide- co -potassium 6-acryl-amidopicolinate) (P(NAGA- co -K6APA)) hydrogel networks which are prepared by one-pot copolymerization . The dynamic lanthanide complexes could not only serve as photoluminescent emitters but also cross-linking points to provide additional strength to the hydrogel network. The tensile fracture stress and Young's modulus can reach up to 3.9 MPa and 0.66 MPa, respectively, comparable to previously reported tough hydrogels. Moreover, because of these dynamic lanthanide coordination bonds, the luminescent hydrogels showed very fast and reversible responsiveness via direct alternating exposure to acid and base without luminance fatigue for at least five cycles. Remarkably, time-dependent luminescence fading process of this dynamic lanthanide complexes provides these hydrogels to be applied in multi-dimensional information encryption and decryption.
研究领域:
材料科学
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化学
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
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IF 4.7
Xin Cong,Kaide Ou,Xuelin Dong,Jiao Ma,Hang Chen,Yonggui Liao,Yajiang Yang,Hong Wang
In this study, a multicolor luminescent material (TSS) was prepared by lanthanide ions (Tb 3+ ) with 2-hydroxybenzoic acid (SA) and spiropyran (SP). TSS exhibited dynamically tunable dual-mode color (optical and fluorescent colors). The absorption and fluorescence spectra revealed that the changes in dual-mode color of TSS depended on the duration of the visible (Vis) irradiation time (t) and excitation wavelength (λ). Consequently, the optical color of TSS can be modulated from orange to colorless with varying t, while its fluorescent color changed from red to green and blue to cyan under 365- and 254-nm ultraviolet (UV) lamp, respectively. The combined effects of fluorescence resonance energy transfer (FRET) between SP and Tb 3+ and the inner filter effect (IFE) between SP and SA contributed to the rich multicolor of TSS. Moreover, the cascade effect of FRET and IFE imparted TSS with fine and tunable time-related features. By employing the color difference value (ΔE) to measure the changes in the dual-mode color of TSS, a binary output logic gate based on ΔE was proposed to realize accurate information encryption and decryption. Furthermore, the ΔE-based encryption strategy enhances the information encryption capacity of multicolor materials through the subdivision of ΔE. This approach provides a cost-effective means of achieving high-capacity information output. Thus, the ΔE-based encryption strategy significantly improves the efficiency of multicolor material utilization. This study demonstrates significant potential for further accurate and low-cost encryption.
研究领域:
材料科学
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光学
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化学
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DOI
高影响因子
CARBOHYDRATE POLYMERS
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2017
·
IF 4.811
Shunli Liu,Kewen Li,Fang Yao,Liqun Xu,Guodong Fu
Nacre-like hybrid films based on N -succinyl chitosan (NSC), sodium alginate (SA) and lanthanide ions were fabricated via coordination interactions. In this work, the binary building blocks (NSC and SA) were self-assembled into aligned hydrogel films by coordination with lanthanide ions, and hierarchical NSC-SA hybrid films were obtained upon drying. Two species of lanthanide ions (Gd 3+ and Yb 3+ ) were used to fabricate the hierarchical NSC-SA hybrid films. The as-prepared NSC-SA hybrid films exhibit high tensile strength and stability. The tensile strength and toughness of as-prepared hybrid films reach 122.10 MPa and 3.89 MJ m −3 , respectively. Meanwhile, the well-aligned lamellar microstructures also exhibit a good light transmittance. The highest light transmittance reaches 92% for NSC-SA hybrid films at 760 nm. This fabrication method for hierarchical NSC-SA hybrid films is innovative due to the utilization of rare earth coordination bonding, and can serve as the basic strategy for the construction of high-performance composites in the near future.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
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2021
·
IF 1.751
Fei-Fei Chen,Shi-He Wang,Xiao-Yun Tang,Jia-Qi Li,Yu-Xian Chi,Jing Jin
Seven coordination polymers having the general formula {[Ln2(2,6-pydc)(ox)2⋅(H2O)4]⋅3H2O}n (Ln = Sm 1, Eu 2, Gd 3, Tb 4, Dy 5, Ho 6, Er 7; 2,6-pydc2− = 2,6-pyridinedicarboxylate, ox2− = oxalate) were synthesized by the hydrothermal method. Their IR, UV-Vis-NIR absorption spectra, and Vis-NIR emission spectra were investigated, and the luminescent properties of the polymers were studied in detail. Crystal structures were determined by means of a single-crystal X-ray diffractometer, and all of them proved to have three-dimensional frameworks. Except for polymers 3 and 7, the polymers displayed the characteristic emissions of Ln(III) ions due to the effective sensitization of ligands. At the same time, the 4f orbitals of Ln(III) ions were shifted by the effects of ligand field, which influenced emission spectra and absorption spectra of some of the polymers.
研究领域:
材料化学
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无机化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2016
·
IF 3.782
Xiang Shen,Bing Yan
A multicolored photoluminescent hybrid system based on lanthanide ions-doped metal organic frameworks/silica composite host has potential in display and barcode applications. By controlling the stoichiometry of the lanthanides via cation exchange, proportional various lanthanide ions are successfully introduced into metal organic frameworks, whose emission intensity is correspondingly proportional to its amount. The resulting luminescent barcodes depend on the lanthanide ions ratios and compositions. Subsequently, the lanthanide ions located in the channels of metal organic frameworks are protected from any interaction with the environment after the modification of silica on the surface. The optical and thermal stability of the hybrid materials are improved for technological application.
研究领域:
材料科学
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光学
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化学
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产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Yuxiang Xin,Jianru Wang,Xiaoli Gao,Yang Yang,Jianbing Zhang,Jiang Tang,Zhuolei Zhang
The development of ultrabroadband light sources spanning the visible (Vis) to near-infrared (NIR) range is of fundamental importance for cutting-edge applications in communication, metrology, and quantum technologies. Although phosphor-converted LEDs have extended emission, they still suffer from spectral gaps, inadequate color rendering, and constrained NIR output. Here, a promising approach is introduced by tailoring multi-exciton energy transfer pathways to realize ultrabroadband Vis-to-NIR emission in Sb 3 ⁺/Ln 3 ⁺ co-doped vacancy-ordered Cs₂HfCl₆ perovskite nanocrystals. By systematically optimizing Sb 3 ⁺ and Ln 3 ⁺ doping concentrations, excitation wavelengths, and lanthanide ion selection, the energy transfer pathways between singlet and triplet self-trapped exciton (STE) states and lanthanide energy levels are modulated. This design facilitates broad spectral tunability through energy distribution control among emission centers, improves radiative efficiency by reducing energy losses during transfer processes, and promotes stable performance by mitigating excessive energy accumulation. The resulting single-component LED based on Sb 3 ⁺/Pr 3 ⁺ co-doped NCs delivers broadband emission extending to ≈1200 nm, high spectral quality (CRI ∼ 98.1, R9 ∼ 98), strong visible/NIR PLQY (≈80%), and steady operation over 50 h. The findings provide insight into energy transfer engineering in low-dimensional perovskites and offer a viable route toward emerging ultrabroadband solid-state light sources.
研究领域:
材料科学
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光学工程
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光电子学
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产品关联
DOI
PubMed
高影响因子
MATERIALS & DESIGN
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2021
·
IF 7.991
Youqiang Huang,Yingjie Zhao,Yuan Liu,Beibei Xu,Shiqing Xu,Gongxun Bai
At present, the shortage of potable water is still a critical issue. The emerging of solar-driven evaporation technique offers a promising way to solve freshwater scarcity. However, developing highly efficient evaporation system is still a challenge. Herein, this work developed two-dimensional heterostructure nanosheets as the photothermal agent. We used the WSe 2 nanosheets to enhance the absorption of graphene and facilitate the heat localization due to its higher visible light absorption and ultralow thermal conductivity. And graphene provided the low surface reflection and a broad absorption spectrum. Moreover, the enhanced near infrared photothermal conversion of the heterostructure nanosheets is realized to be 41.4% higher than some previous works by introducing lanthanide ions. A series of experiments are performed to determine its heterostructure. Besides, the interfacial evaporation system has been constructed based on as-prepared nanosheets, exhibiting excellent solar-to-heat efficiency of 91.8% and water evaporation rate of 1.672 kg m −2 h −1 under stimulated 1 sun irradiation. It is suggested that developed nanosheets have the potential application for highly effective solar-driven evaporation.
研究领域:
材料科学
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能源科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Kun He,Libin Zhang,Yuan Liu,Beibei Xu,Liang Chen,Gongxun Bai
The non-contact thermometry based on fluorescence intensity ratio of phosphors has been extensively investigated owing to its high sensitivity and fast response. However, most of them only use a single mode of upconversion or downconversion emission for temperature sensing and ignore the affection of the humidity. In this work, the Yb/Er ions doped La 2 Mo 3 O 12 microcrystals with nonhygroscopic property and multimode luminescence have been developed for temperature sensing. The optical thermometer could be based on not only luminescent intensity ratio of upconversion and downconversion, but also average fluorescence decay lifetime. The maximal absolute sensitivity can reach up to 6.2% K −1 and the maximal relative sensitivity is 1.63% K −1 . Moreover, the fluorescence emission intensity of the doped La 2 Mo 3 O 12 microcrystals will not be affected by the humidity compared to some doped molybdate and tungstate . These excellent performances suggest that the La 2 Mo 3 O 12 :Yb/Er microcrystals possess great potential for practical applications in temperature sensing.
研究领域:
材料科学
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光学工程
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无机化学
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传感器技术
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生物医学工程
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DOI
高影响因子
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