CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Hengjuan Deng,Xinxin Han,Xinyi Wang,Dongxi Liu,Sheng Cao,Bingsuo Zou
Multifunctional luminescent materials emiting dual white and near-infrared (NIR) radiation have broad applications in various fields, including illumination, food detection and bio-imaging. Herein, an ultra-wide spectrum ranging from 330 to 1000 nm is achieved simply by co-doping Bi 3+ and Cr 3+ into the double perovskite K 2 LiGaF 6 , enabling simultaneous emission of white and NIR light. The emission bands peaking at 475 and 750 nm correspond to the radiative transitions of Bi 3+ and Cr 3+ , respectively. Systematically studies reveal that the NIR emission of Cr 3+ originates from efficient energy transfer from Bi 3+ , with energy transfer efficiency exceeding 80 %. The energy transfer mechanism is thoroughly explained. Moreover, the red partial emission of Cr 3+ in turn compensates the missing red component in the bluish emission of Bi 3+ , contributing to the final white emission. Notably, Bi 3+ ions occupy double lattice sites of Ga 3+ and Li + , which exhibit distinct luminescence properties. The luminescence behaviors of double Bi 3+ and Cr 3+ centers at various temperatures are systematically analyzed. Finally, the combination of the as-prepared dual-emissive K 2 LiGaF 6 :Bi 3+ ,Cr 3+ phosphor and a UV chip demonstrates potential applications in illumination, food detection and bio-imaging. This work provides new perspectives for the design of multifunctional luminescent materials and their deployment in diverse application scenarios.
研究领域:
材料科学
·
生物成像
·
食品检测
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2022
·Vol. 14
·期 5
·573-586
·
IF 5.364
Xinjin Yan,Meng Wei,Xu Miao,Xiaoguang Qiao,Xiaomeng Zhang,Peng Fu,Xinchang Pang,Minying Liu,Qingxiang Zhao,Shuang Chen,Zhe Cui
Luminescence of non-conjugated polymers attracts much attention due to its importance in fundamental and applied research. At present, however, the research on nonconventional luminescent polymers (NLPs) in terms of both the structure regulation and emission mechanism seems to be still in its infancy. Herein, we report for the first time that PA1212, a representative engineering plastic with the longest saturated carbon chain among commercial polyamides, is an efficient NLP, which exhibits dual emission of blue fluorescence and persistent room-temperature green phosphorescence as well as high quantum yield (∼13%). Systematic photophysical characterization demonstrates the important role played by hydrogen-bonded amide groups in the emission, and the emission intensity shows a clear linear positive correlation with the amide clusters constructed from ordered hydrogen bonds in the crystalline region. Moreover, PA1212 in the α form with linearly extended hydrogen-bonded clusters exhibits longer emission wavelengths than in the γ form, owing to the narrower band gap between the valence band maximum and the conduction band minimum. Further variable temperature fluorescence studies reconfirm the amide cluster-triggered emission (CTE) mechanism of PA1212, and show the possibility of application of fluorescence spectra in the study of polyamide aggregation states. This work not only deepens the understanding of CTE, but also provides a new strategy to regulate the luminescence of polyamides, and meanwhile, highlights the application prospects of luminescent polyamides.
研究领域:
材料科学
·
光物理学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Weixi Xia,Yulong Ye,Qinan Mao,Yang Ding,Xinyue Li,Meijiao Liu,Jiasong Zhong
The combination of indoor plant growth lamps and soilless cultivation is considered as a promising direction for future agricultural technology. Its environmentally friendly, effective, and energy-saving characteristics make the plant lighting phosphor widely concerned. However, the phosphor with the required emission spectrum for plant growth while simultaneously achieving dual emission of blue and far-red light is still rarely developed. To address this challenge, a series of Sr 2 GdGaO 5 :Bi 3+ , Sr 2 GdGaO 5 :Mn 4+ , and Sr 2 GdGaO 5 :Bi 3+ , Mn 4+ phosphors have been designed and thoroughly characterized in terms of their phases, morphologies, and optical properties . Dual emission of Sr 2 GdGaO 5 : Bi 3+ , Mn 4+ in blue light (475 nm) and far-red light (726 nm) regions is observed under 350 nm ultraviolet light excitation, and the energy transfer mechanism determined to be dipole-dipole interaction. A high coincidence between plant growth absorption spectrum and co-doping induced double emission is realized. Tremendous acceleration of garlic and bean seedling growth can be observed under the illumination of phosphor-encapsulated LED in soil-free conditions. This comprehensive work contributes to the understanding and utilization of phosphors for efficient indoor plant lighting applications and opens new possibilities for energy-saving and effective plant cultivation.
研究领域:
农业技术
·
光学材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Zhiwei Xia,Lan Yao,Xin Pan,Ke Su,Rujun Yang,Yuanhao Jian,Rong-Jun Xie,Lefu Mei
The development of efficient dual-emissive and temperature-sensitive luminescent materials is critical for advancing non-contact optical thermometry. Herein, we employed a co-doping strategy to enhance energy transfer pathways in Ca 9 Ga(PO 4 ) 7 phosphors. Under 331 nm excitation, dual emissions from Eu 2+ (415 nm) and Cr 3+ (696 nm) were achieved, with Zn 2+ enhancing the near-infrared (NIR) of Cr 3+ . The optimal Cr 3+ concentration led to an approximately six-fold increase in NIR emission intensity, attributed to Eu 2+ -induced crystal field modulation and efficient dipole-dipole energy transfer, which are evidenced by comparing the emission spectra and decay curve lifetimes. Temperature-dependent emission spectra revealed that Eu 2+ emission remained stable, while Cr 3+ emission exhibited significant temperature sensitivity in Ca 9 Ga(PO 4 ) 7 :Zn 2+ ,Eu 2+ ,Cr 3+ , enabling precise temperature sensing with a peak sensitivity of 1.256 % K −1 at 298 K. This work offers a novel approach to improving energy transfer efficiency and dual-emission properties, contributing to the development of high-performance, real-time optical thermometry and photonic technologies.
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 ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zhou Yuan,Le Han,Yuchi Zhang,Lufang He,Peng Liu,Yan Xu
Self-assembled inorganic metal halide perovskite composites with high emitting efficiency, tunable multimode emission and stimuli-responsive luminescence demonstrated great potential in diversified luminescence applications. Here, a novel CsPbBr 3 /EuWO 4 (OH) composite was successfully prepared through the surface adsorption of Pb 2+ ions on hydroxylated EuWO 4 (OH) microsheets and subsequent nucleation of CsPbBr 3 peroviskite quantum dots (PQDs) by the anti-solvent crystallization in CsBr containing N,N-dimethylformamide (DMF) solution. Due to the distinct fluorescent thermochromic switching properties of temperature-insensitive Eu 3+ and sensitive CsPbBr 3 PQDs emitting centers, the resultant CsPbBr 3 /EuWO 4 (OH) composite exhibits excellent ratiometric temperature sensing performance. The CsPbBr 3 /EuWO 4 (OH) thermometer based on the fluorescence intensity ratio (FIR) technique originating from emissions of Eu 3+ to CsPbBr 3 PQDs was then explored with a high temperature sensitivity (S r ) of 5.8 % ℃ −1 at 54 ℃. In addition, a high-security-level information encryption scheme was proposed by utilizing the excitation-wavelength-dependent switchable fluorescence of CsPbBr 3 /EuWO 4 (OH) composite. This study provides a simple and feasible strategy for assembling dual-emission CsPbBr 3 /EuWO 4 (OH) composite, showing potential applications in optical ratiometric thermometry and information encryption fields.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
OPTIK
·
2021
·
IF 2.443
Yaoyao Yang,Xiao Min,Mengzhu Hu,Bingfa Liu,Yuheng Wu,Yuansheng Wu,Lixin Yu
In this study, a dual photoluminescence (PL) carbon quantum dots (CQDs) are obtained using two common raw materials, phenylenediamines and phosphorus acid, with a one-step hydrothermal method . The three typical CQDs are obtained by using three phenylenediamine isomers as carbon source, which can emit a bright and stable turquoise, green and yellow light under a single ultraviolet-light excitation, respectively. In addition, the effect of reaction temperature and ambient pH on the performance of CQDs is systematically researched in the hydrothermal process. The results show that tunable optical properties of CQDs can be achieved by changing the reaction temperature, carbon sources and the surrounding pH value.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2016
·Vol. 183
·期 9
·2547-2553
·
IF 4.831
Qu Fei,Sun Zhe,Liu Dongya,Zhao Xianen,You Jinmao
The authors describe dual-emission carbon nanodots containing blue emitters (BE; peak emission at 385nm under 315 nm excitation) and yellow emitters (YE; peak emission at 530 nm under 365nm excitation), and how they can be applied to direct and indirect determination of tetracyclines (TCs). The direct detection scheme is based on the finding that tetracycline (TET), oxytetracycline, chlortetracycline and doxycycline quench the two emissions of the carbon dots. While direct determination is rapid and convenient, it cannot differentiate between TCs. The indirect detection scheme, in contrast, is based on the finding that Al (III) ions enhance the fluorescence of the YE in the carbon dots, and that they cause a blue shift in emission. It is, however, known that TET forms a strong complex with Al (III), and this can inhibit the interaction between Al (III) and the YE, so that the fluorescence of YE is not enhanced and blue-shifted by Al (III) in the presence of TET. This finding is exploited in a fluorescence turn-on/off assay for TET that can distinguish TET from other TCs. The linear range of indirect determination for TET extends from 1 nM to 30 μM, and the limit of detection is 0.52 nM. The indirect method was successfully applied to the determination of TET in spiked milk, fish and pork, and recoveries ranged from 91.7 to 102 %.
High concentrations of tetracyclines quench the dual (blue and green) emission of carbon dots. Additionally, based on the fluorescence enhancement of yellow emitters by Al 3+ , an indirect turn-on/off detection of tetracycline is established with high selectivity and sensitivity.
研究领域:
分析化学
·
纳米材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2018
·Vol. 11
·期 11
·2232
·
IF 2.467
Jiahui Wang,Hao Zhang,Ruifang Guan
Dual-emission nanosensor for Hg2+detection was prepared by coupling CA-AEAPMS on the surface of RBS-doped modified silica microspheres. The CA-AEAPMS was synthesized by usingN-(β-aminoethyl)-γ-aminopropyl methyldimethoxysilane (AEAPMS) and citric acid as the main raw material. The obtained nanosensor showed characteristic fluorescence emissions of Rhodamine B (red) and CA-AEAPMS (blue) under a single excitation wavelength (360 nm). Upon binding to Hg2+, only the fluorescence of CA-AEAPMS was quenched, resulting in the ratiometric fluorescence response of the dual-emission silica microspheres. This ratiometric nanosensor exhibited good selectivity to Hg2+over other metal ions, because of the amide groups on the surface of CA-AEAPMS serving as the Hg2+recognition sites. The ratio of F450/F580linearly decreased with the increasing of Hg2+concentration in the range of 0 to 3 × 10−6M, and a detection limit was as low as 97 nM was achieved. Then, the addition of three thiol-containing amino acids (Cys, Hcy, GSH) to the quenched fluorescence solution with Hg2+can restore the fluorescence, and the detection limits of the three biothiols (Cys, Hcy, GSH) are 0.133 μM, 0.086 μM, and 0.123 μM, respectively.Keywords:dual-emission;silica microspheres;fluorescence
研究领域:
分析化学
·
环境科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Zhizhou Liu,Tong Wang,Liang He,Xueyan Nan,Xuming Sun,Pengli Bai
Bacillus anthracis, an extremely dangerous bacterium which can cause pulmonary anthrax and be used as biochemical weapon agent, can be detected by the detection of its major biomarker 2, 6-pyridine dicarboxylic acid (DPA). Herein, we reported the solvothermal synthesis of a non-luminescent NH 2 -BDC-Eu-MOF using Eu 3+ and 2-aminoterephthalic acid (NH 2 -BDC). The emission of amino ligand and Eu 3+ ions are absent in ethanol while the addition of DPA could recover both emission at 460 and 624 nm respectively. Thus this MOF can act as a dual emission ‘‘turn-on’’ probe for DPA detection. The detection limits (LOD) of this DPA probe are about 0.8 μM in ethanol and 0.36 μM in water, which are much lower than an infectious dosage of bacillus anthracis spores (60 μM) for human being. In order to monitor DPA levels more conveniently, we developed a one-to-two decoder logic gate operation, which can determinate DPA via color discrimination.
研究领域:
生物化学
·
材料科学
·
医学检测
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 47
·21882-21894
·
IF 3.5
Hu Hao,Zhao Xia,Mao Xiang,Dong Yongrun,Li Wen,Xue Jinkun,Li Zequan,Gao Wei
White light-emitting diodes (WLEDs), as strong contenders for future solid-state light sources, hold significant promise in solid-state lighting due to their high efficiency, low power consumption, self-emission, and versatility. Carbon dots (CDs), a novel type of carbon nanomaterials, exhibit excellent luminescence properties. However, their intricate structure and unclear fluorescence mechanism hinder long-wavelength modulation, and solid-state aggregation leads to luminescence quenching, limiting their application in optoelectronic devices. This study focuses on the preparation of CDs with dual yellow–green emission peaks via a hydrothermal method using sodium lignosulfonate as a carbon source. The mechanism behind the dual emission is elucidated by analyzing the morphology and chemical composition of the CDs. Specifically, the green light originates from surface-related states due to N doping, while the yellow light results from the carbon-core state at higher hydrothermal temperatures. By incorporating these CDs into transparent wood, a material capable of emitting white light under blue light excitation is achieved. This transparent wood was successfully applied in the fabrication of WLEDs, providing valuable insights into CDs modulation and their utilization for white light solid-state lighting applications.
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
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Yulin Zhu,Mengqi Zhu,Qiuju Zhou,Qunwei Shu,Kejun Tan
Up/down-conversion dual-emission carbon dots (U/D-CDs) are rare and have potential in analytical sensing. Herein, a kind of novel U/D-CDs was prepared successfully by a one-step solvothermal method. The prepared U/D-CDs exhibited similar dual-emission behaviors at excitation wavelengths of 300 nm and 680 nm, respectively. In addition, U/D-CDs displayed good photostability and salt-resistance. Due to the protonation-deprotonation, U/D-CDs showed strong pH dependence in the pH range of 2.0–8.0, which developed an up/down-conversion dual-channel ratiometric fluorescence (FL) probe of pH. The FL intensity of U/D-CDs can be effectively quenched by Cu 2+ through the static quenching effect. Meanwhile, an obvious color change from yellow-green to blue can be observed under ultraviolet light with the increase of Cu 2+ concentration. The up/down-conversion dual-channel ratiometric fluorescence sensor can be used for the visual sensing of pH and Cu 2+ , which also eliminates background signals and improves its accuracy and selectivity in complex samples.
研究领域:
分析化学
·
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
MOLECULES
·
2019
·Vol. 24
·期 12
·2278
·
IF 3.06
Zhihui Luo,Hui Xu,Baogui Ning,ZeBin Guo,Na Li,Lina Chen,Guobao Huang,Charlie Li,Baodong Zheng
In this study, a novel dual-emission ratiometric fluorescent nanoprobe (RFN) was synthesized and ultilized for highly sensitive determination of mercury ions. In this nanoprobe, fluorescein isothiocyanate (FITC) doped silica (SiO2) served as a reference signal, FITC–SiO2microspheres were synthesized and modified with amino groups, and then Au Nanoclusters (AuNCs) were combined with the amino groups on the surface of the FITC–SiO2microspheres to obtain the RFN. The selectivity, stability, and pH of the RFN were then optimized, and the determination of mercury ions was performed under optimal conditions. The probe fluorescence intensity ratio (F520nm/F680nm) and Hg2+concentration (1.0 × 10−10mol/L to 1.0 × 10−8mol/L) showed a good linear relationship, with a correlation coefficient of R2= 0.98802 and a detection limit of 1.0 × 10−10mol/L, respectively. The probe was used for the determination of trace mercury ion in water samples, and the recovery rate was 98.15~100.45%, suggesting a wide range of applications in monitoring pollutants, such as heavy metal ion and in the area of environmental protection.Keywords:ratiometric fluorescent nanoprobe;dual-emission;mercury ions;determination
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）