JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Jian-Wei Zhang,Ya Chen,Yong-Ya Zhang,Wei Wei
In this work, by utilizing an X-type tetracarboxylate ligand (1,2,4,5-tetrakis(4-carboxyphenyl)benzene, H 4 TCPB), a novel Mn-organic framework, namely, [(CH 3 CH 2 ) 2 NH 2 ] 2 [Mn(TCPB)(H 2 O) 2 ] ( SQNU-25 , SQNU = Shangqiu Normal University), was prepared under a DEF/HAc solm. Due to the structural advantage of SQNU-25 , the Ln 3+ ions (Eu 3+ and Gd 3+ ) have been successfully introduced into the framework by post-synthetic modification. The result of the energy levels of the H 4 TCPB ligand and Eu 3+ ion shows that the H 4 TCPB ligand as a chromophore can effectively sensitize Eu 3+ ions. Moreover, the Eu@SQNU-25 not only shows a typical Eu 3+ ion red emission but also exhibits good temperature sensing in the wide temperature range (80 to 300 K).
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2025
·
IF 6.4
Lanxuan Yang,Lili Liu,Xu Ding,Ruili Xu,Tian Tian,Zhifu Liu,Lianjiang Tan,Yaoqing Chu
The asymmetry of the local environment within host materials plays a critical role in enhancing the emission performance of Eu3+ ions. In this study, we introduced a novel Si4+-doping strategy to optimize the luminous properties of Eu3+ ions by promoting asymmetry in the local lattice environment. And then, a series of Si4+/Eu3+ co-doped Sr3Ga2Ge4O14 phosphors were synthesized. Our findings reveal that Si4+-doping at a concentration of 60 mol% significantly enhances the emission intensity of Eu3+ ions in the Sr3Ga2Ge4O14 host by approximately 80%. Also, the internal quantum efficiency increases from 37.80% to 49.04%, alongside a rise in color purity from 87.40% to 99.80%. Utilizing this Sr2.3Ga2Ge1.6Si2.4O14:0.7Eu3+ high-performance red phosphor, we fabricated a white light-emitting diode (WLED) device with natural white light characteristics, achieving CIE coordinates of (0.338, 0.323), a correlated color temperature (CCT) of 5636 K, and a color rendering index (CRI) of Ra = 89.4. Additionally, we developed a high-performance anti-counterfeiting ink using this red phosphor, which adheres uniformly to surfaces with varying roughness and delivers exceptional luminescence effects. This study provides new insights into the development of advanced red-emitting phosphors for applications in lighting and anti-counterfeiting technologies.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Lin Xiang,Xianju Zhou,Li Li,Faling Ling,Yanhong Li,Jingfang Li,Hongmei Yang
Eu 3+ ions are extensively employed as spectroscopic probes because of the particular emissions due to the unique 4f 6 electronic configuration. Herein, we have developed a series of interesting fluorescent powders of Eu 3+ activated Sr 2 MNbO 6 (M = Ga, In, Gd). When Sr 2 GaNbO 6 :Eu 3+ is excited by the photons in the range of charge transfer band (CTB), the dark red 5 D 0 → 7 F 4 transition predominates the emission, exhibiting an anomalous intensity even higher than that of 5 D 0 → 7 F 1 or 5 D 0 → 7 F 2 . Whilst, if the sample is pumped by f-f characteristic transitions, the hypersensitive 5 D 0 → 7 F 2 transition emerges as the strongest. However, Eu 3+ doped Sr 2 InNbO 6 and Sr 2 GdNbO 6 never demonstrate such results, 5 D 0 → 7 F 1 acts as the most intense one regardless of the excitation wavelength. It is found that Eu 3+ substitutes Sr 2+ site, and cuboctaherdron [SrO 12 ] with O h symmetry is likely to deform to triangular orthobicupola D 3h symmetry, leading to two non-equivalent crystal sites in Sr 2 GaNbO 6 host. But Eu 3+ replaces In 3+ and Gd 3+ position with O h symmetry and has only one site in Sr 2 InNbO 6 and Sr 2 GdNbO 6 . Based on the comparative study on the intensity of 5 D 0 → 7 F 0 transition, as well as the influence factors of temperature, the doping concentration on the relative intensity among 5 D 0 → 7 F J transitions, and the band gaps of these three hosts, the origin of the abnormal intense 5 D 0 → 7 F 4 is ascribed to the mixing of CTB and low-lying 4f 6 configuration as well as two non-equivalent Eu 3+ sites.
研究领域:
材料科学
·
光物理学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2019
·
IF 0
Peng Du,Weiguang Ran,Yafei Hou,Laihui Luo,Weiping Li
The Eu3+-activated NaGdF4 nanorods were achieved through a simple precipitation procedure at ambient temperature. With the irradiation at 396 nm, the designed nanorods exhibited visible red light with admirable color purity of 90.5% and the optimal doping concentration was 50 mol %. The concentration quenching mechanism was revealed to be decided by dipole–quadrupole interaction and the critical distance was 11.14 Å. The optical transition parameters, which were estimated from Judd-Ofelt theory, of the Eu3+ ions were obtained to confirm its local symmetry behaviors. Moreover, the emission spectra of the designed nanorods at diverse temperatures were used to identify its thermal quenching performance. In comparison with that of the Y2O3:Eu3+ compound, the emission intensity of the Eu3+-activated NaGdF4 nanorods with optimum doping content was 2.47 times higher and its internal quantum efficiency was around 62.3%. Furthermore, the developed white light-emitting diode device, which was constructed by resultant nanorods, green-emitting phosphor (i.e., (Ba,Sr)2SiO4:Eu2+), blue-emitting phosphor (i.e., BaMgAl10O17:Eu2+), and a near-ultraviolet chip, exhibited admirable colorific properties (i.e., good color coordinates, low correlated color temperature, high color rendering index). These achieved features implied that the NaGdF4 nanorods doped with Eu3+ ions were sutiable red-emitting platforms for indoor illumination.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
OPTICAL MATERIALS
·
2025
·
IF 4.2
Linfang Ma,Yanan Li,Xiaoyi Liu,Shengda Liu,Guixia Liu,Dan Li,Jinxian Wang,Wensheng Yu,Xiangting Dong
The self-activated and rare earth Dy 3+ and Eu 3+ ions doped Na 2 YMg 2 V 3 O 12 phosphors with single garnet structure were obtained by using solid state reaction method. Self-activated Na 2 YMg 2 V 3 O 12 phosphors have a wide excitation band in near-ultraviolet range, Dy 3+ and Eu 3+ ions were co-doped in Na 2 YMg 2 V 3 O 12 host to broaden the excitation peak range of the phosphors. Using 365 nm near-ultraviolet light as the excitation wavelength, Na 2 YMg 2 V 3 O 12 :Dy 3+ ,Eu 3+ phosphors simultaneously emit sharp transition peaks of Dy 3+ ions at 487 nm and 576 nm, and red transition peaks of Eu 3+ at 595 nm, 611 nm and 635 nm. The energy transfer processes between VO 4 3− , Dy 3+ and Eu 3+ were discussed. The multicolor light emitting can be adjustable and white light can be realized due to the changing amount of the doped ions. Emission spectra dependent of temperature showed that Na 2 YMg 2 V 3 O 12 :Dy 3+ , Eu 3+ phosphors had good thermal quenching performance, indicating that the phosphors can be used in the field of near ultraviolet excited WLED.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 24
·20808-20819
·
IF 2.324
Zhao Ji,Zhao Dan,Liu Bao-Zhong,Xue Ya-Li,Fan Yan-Ping,Zhang Shi-Rui,Zong Qiu
A new member of rare-earth orthoborate K 3 Gd 3 B 4 O 12 was prepared by a flux method and structurally characterized by single-crystal structure analysis for the first time. It features a two-dimensional layer structure containing [Gd 8 (BO 3 ) 8 ] ∞ layers parallel to the ab -plane. Gd(3)O 7 groups, B(3)O 3 groups, B(4)O 3 groups and large K + ions distribute in between the[Gd 8 (BO 3 ) 8 ] ∞ layers, and bond adjacent layers. Theoretical researches by density functional theory (DFT) revealed that the compound K 3 Gd 3 B 4 O 12 is an indirect band-gap semiconductor and the optical absorption can be mainly ascribed to O→K, O→Gd and O→B charge transfers. Moreover, a series of K 3 Gd 3− x − y B 4 O 12 : x Tb 3+ , y Eu 3+ phosphors were prepared, their morphology and tunable multicolour emission properties were studied. Under UV or near-UV excitations the luminescence colours will tune from green through yellow, orange to red by simply adjusting the relative Tb 3+ and Eu 3+ concentrations.
研究领域:
材料科学
·
光学
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA SCRIPTA
·
2025
·Vol. 100
·期 3
·035514
·
IF 2.6
Ruiliang Zuo,Zehua Zhang,Jingheng Liang,Zhenzhen Jiang,Lili Wang,Zian Cheak Tiu
In this study, we synthesized Y2Zr2O7 (YZO): Bi3+/Eu3+ microcrystals through high-temperature solid-phase method. When the microcrystals were excited upon 263 nm and 329 nm, a tunable emission color variation from red to white is observed. The Correlated Color Temperature (CCT) of YZO: 6% mol Bi3+, 5% mol Eu3+ excited upon 329 nm is 4194 K, exhibited warm white light. Furthermore, the emission intensity of Eu3+ ion is remarkably improved by the incorporation of Bi3+ ion, due to the energy transfer from Bi3+ ion to Eu3+ ion. Their efficiency (ηT) in YZO: 6% mol Bi3+, 5% mol Eu3+ reaches 49.17%. The corresponding absolute quantum efficiency (λex = 329 nm) of YZO: 6% mol Bi3+, 5% mol Eu3+ is 56.21%. These results indicate that YZO: Bi3+/Eu3+ microcrystals are highly potential to enhance the industrial growth of photonics field, particularly the application of anti-counterfeiting and white light-emitting diodes.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Optical Materials
·
2024
·
IF 0
Haitang Hu,Miaomiao Wang,Shoujun Ding,Chuancheng Zhang,Hao Ren,Yong Zou,Wenpeng Liu
Rare earth ion-doped luminescent materials exhibit significant potential for application in visible solid-state laser and anticounterfeiting applications. The Czochralski method was employed to successfully synthesize high-quality Dy3+, Eu3+ codoped Gd3Sc2Al3O12 (GSAG), and Gd2.79Y0.21Sc2Al3O12 (GYSAG) single crystals. Comprehensive studies were conducted on their structural and physicochemical properties, luminescence properties, and fluorescence lifetime. The Dy,Eu:GSAG and Dy,Eu:GYSAG crystals both display favorable thermal conductivity values of 5.56 and 5.43 W m–1 K–1, respectively, along with commendable hardness properties of 7.241 and 7.247 kg/mm2. The emission color of the Dy,Eu:G(Y)SAG crystals can be adjusted from white light under a 355 nm excitation to orange-red light under a 405 nm excitation and bright yellow light under a 450 nm excitation. Additionally, the maximum stimulated emission cross-section for both crystals was calculated under various wavelength laser excitations. The fluorescence lifetime of the crystals at the 4F9/2 level (Dy3+) and the 5D0 level (Eu3+) was also examined. Notably, the fluorescence quantum efficiencies at the 4F9/2 level in Dy,Eu:GSAG and Dy,Eu:GYSAG were measured to be impressive at 91.3 and 92.7%, respectively. The mechanism of resonance energy transfer between Dy3+ and Eu3+ was analyzed, indicating promising applications of Dy,Eu:G(Y)SAG in visible solid-state lasers and multimode anticounterfeiting.
研究领域:
材料科学
·
光学
·
物理化学
✓ 已验证
DOI
OPTICAL MATERIALS
·
2015
·
IF 1.981
Xinzhi Wang,Jianguo Tang,Qingsong Xu,Wenfei Shen,Yao Wang,Jixian Liu,Yanxin Wang,Linjun Huang,Jiqing Jiao,Die Wang,Yan Song,Laurence A. Belfiore
A novel method to prepare fluorescent polymeric aggregates via Eu 3+ -induced self-assembly is described in this research contribution. The amphiphilic polymeric ligand, polystyrene-block-poly(N-vinylpyrrolidone) (PS-b-PNVP) was synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization. Eu 3+ ions that function as coordination crosslinking agents were added to the reactive solution to induce self-assembly within the PNVP block. Eu 3+ ions preferentially coordinate to PNVP segments, yielding coordinatively cross-linked networks with reduced solubility in the solvent. Polystyrene segments retain their solubility in solution due to the amphiphilic character of the block copolymer. Mechanisms for self-assembly and reversible network formation are discussed. Due to the unique optical properties of Eu 3+ ions, in-depth analysis of fluorescent data was performed. These aggregates were drip-coated onto the surface of silicon wafers, with subsequent investigation of polymer morphology near the interface with silicon. This represents the initial step in the development of opto-electronic and photovoltaic applications for these self-assembled fluorescent polymeric aggregates.
研究领域:
材料科学
·
光学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Yan Fan,Xueqin Sun,Wenyuan Zhang,Jiacheng Liu
A novel fluorescent sensor material of Eu 3+ @ Citric acid-functionalized UiO-66 (denoted as Eu 3+ @UiO-66-CA) was prepared successfully via a two-step post synthetic modification towards UiO-66. The as-obtained Eu 3+ @UiO-66-CA presented the characteristic emission of Eu 3+ ions (λ ex = 270 nm), which could be used for rapidly detecting Fe 3+ and Cr 2 O 7 2- ions by luminescence quenching in aqueous solution. The detection process for Fe 3+ ion (detection limit, 18.1 μ M) and Cr 2 O 7 2- ion (detection limit, 8.5 μ M) exhibited the high selectivity and excellent anti-interference ability. Systematic investigations were employed to make clear the mechanism of fluorescence quenching after adding Fe 3+ and Cr 2 O 7 2- ions. Moreover, the Eu 3+ @UiO-66-CA was also used for the determination of Fe 3+ and Cr 2 O 7 2- ions in the Yellow River and tap water.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Qi Zhou,Xuelin Dong,Yuxiang Xiong,Binbin Zhang,Shan Lu,Qin Wang,Yonggui Liao,Yajiang Yang,Hong Wang
In this work, we reported a multi-responsive luminescent hydrogel with properties of encryption, naked eye sensing of glucose, shape memory, self-healing, and antibacterial activity. The hydrogel (GA/CCS/DNSA/Eu3+) was obtained by mixing phenylboronic acid-modified gelatin (GA-DBA), catechol-modified carboxymethyl chitosan (CCS-PCA), 3,5-dinitrosalicylic acid (DNSA), and Eu3+ ions through a facile heating–cooling process. The resultant hydrogel exhibits reversible luminescence and color and phase changes in response to temperature, acid/base, salt, and redox stimuli. Based on the multiple responsiveness, information encryption and decryption, naked eye sensing of glucose, remarkable shape memory, and enhanced mechanical properties of the as-prepared hydrogel were realized. In addition, the self-healing capacity was also achieved due to the dynamic bonds in GA/CCS/DNSA/Eu3+ hydrogels. Specifically, the GA/CCS/DNSA/Eu3+ hydrogels possess antibacterial activity owing to the bacteriostasis of the CCS-PCA and DNSA/Eu3+ complex. Thus, GA/CCS/DNSA/Eu3+ hydrogels have potential applications in the fields of anticounterfeiting, wearable devices, biomedicine, sensing, etc.
研究领域:
材料科学
·
纳米技术
·
生物材料
·
化学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）