NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 27
·12342-12347
·
IF 2.7
Yu Qi,Chengyue Xin,Wenjun Zhang,Zhongfa Li,Zihan Chen,Zhongyu Duan
Te4+-doped Cs2ZrCl6 vacancy-ordered perovskites with excitation wavelength-dependent tunable color have been synthesised by a simple precipitation method at room temperature, with two luminescent centres originating from the Te4+ and the STE (self-trapping exciton) of the Cs2ZrCl6 itself, respectively. They exhibit two different emission characteristics at 254 nm and 365 nm excitation wavelengths. At an excitation wavelength of 254 nm, the emission characteristics allow Te4+-doped Cs2ZrCl6 to exhibit tunable emission from blue to white to yellow under the control of Te4+ doping. And the excitation wavelength of 365 nm shows yellow emission. Te4+ doped Cs2ZrCl6 phosphors were used for optical anti-counterfeiting, and the anti-counterfeiting patterns were well distinguished under 254 nm and 365 nm UV lamps, demonstrating the potential of this excitation wavelength-dependent tunable color material for optical anti-counterfeiting applications.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2021
·
IF 3.867
Ziyao Wang,Jiaxiang Huo,Xuezhu Luan,Shineng Sun,Guofeng Ma
In this work, the feasibility of applying Sr 3 P 4 O 13 :Eu 3+ , a micron phosphor, to latent fingerprint visualization was explored and discussed. The preferential occupancy of Eu 3+ in the host lattice was analyzed based on the bond energy method. The excitation-wavelength-dependent luminescence properties of the phosphor were investigated through the photoluminescence emission and excitation spectra . The phosphor could be pumped effectively by deep ultraviolet and near ultraviolet. The luminescent color of the phosphor could be tuned from reddish orange (0.6025, 0.3939) to yellow (0.4729, 0.5031) with the change of excitation wavelength from 254 nm to 394 nm. The multilevel features of the phosphor-attached latent fingerprint could be identified clearly in deep ultraviolet. The high color contrast between ridge and valley lines provided a splendid condition for the observation. Moreover, the effect of the phosphor used on different substrates for latent fingerprint visualization was explored. All the results reveal that the phosphor was a good potential choice for latent fingerprint visualization.
研究领域:
材料科学
·
法医学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2023
·Vol. 11
·期 10
·2202884
·
IF 9
Ling Zhang,Zhongling Lang,Yang Lu,Xu Zhao,Bin Jiang,Xu Yan,Peng Sun,Fengmin Liu,Guangdong Zhou,Mi Zhou,Yanchao Wang,Xiaomin Liu,Geyu Lu
Local structural engineering is an endogenous approach to modulate upconversion luminescence (UCL) from upstream to meet the needs of specific application scenarios. Herein, high pressure is utilized as a means to modulate the local structure, and the designed LiErF 4 :0.5%Tm 3+ @LiYF 4 (Er:Tm@Y) nanoparticles with fast energy transfer rates, abundant cross-relaxation processes, and multiple near-infrared wavelengths (808, 980, 1530 nm) excitation properties are tailored as local structure-sensitive hosts. A unique excitation wavelength-dependent UCL enhancement of Er:Tm@Y upconversion nanoparticles is observed by pressure-induced local structure distortions. When the pressure of ≈6 GPa is applied, the UCL is enhanced by a factor of 2.6 at 980 nm excitation only. After pressure release, the luminescence diminishes and recovers. Density functional theory calculations show that the symmetry distortion of the LiErF 4 crystal reaches a maximum at pressurization to 6 GPa, while a new Er-4f state emerges, greatly reducing the bandgap from 8.3 to 5.7 eV. Comparative experiments demonstrate that the local symmetry distortion caused by 0.5%Tm 3+ doping and the different energy transfer patterns of Er 3+ to Tm 3+ at different excitations are responsible for this wavelength-dependent luminescence enhancement.
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 Chemistry C
·
2022
·Vol. 10
·期 13
·5109-5115
·
IF 8.067
Tao Pang,Yanyan Wu,Yujian Zhang,Ronghua Jian,Junwen Mao,Hong Wang,Hai Guo
Although much effort has been focused on thermally enhanced upconversion (UC) luminescence, it remains a challenge to maintain or even enhance the UC luminescence of NaLnF4-based phosphors (Ln = Y, Gd, Lu) using a surface-independent strategy. In this work, we demonstrate that the effect of temperature on UC luminescence in NaGdF4:Nd3+/Yb3+/Er3+ nanocrystals is strongly dependent on the exciting wavelength. When excited using 808 nm radiation, the UC luminescence exhibits good resistance to thermal quenching. The reason is that, in this situation, the negative effect of multi-phonon decay can be fully compensated by the thermal enhancement in the transition cross-section and in energy-transfer rate. Our research reports a novel strategy for the anti-thermal quenching of upconversion luminescence, which is potentially applicable in the design of dynamic UC anti-counterfeiting as well as in NIR-I-responsive thermometers and nanoheating.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lei Wang,Ning Zhao,Changrui Zhu,Lei Chen,Yang Jiang,Rulong Zhou,Yanfang Liu,Bingyan Qu,Hubertus T. Hintzen
In the field of solid-state luminescence, Cu 2+ has long been widely acknowledged for its capacity to emit infrared light. However, the occurrence of visible emission from Cu 2+ ions had been infrequently observed and reported. In this study, we made an intriguing discovery by examining the behavior of Cu 2+ within an irregular coordination environment of Ba in BaGa 2 O 4 . When excited by UV light, Cu 2+ unexpectedly gave a vibrant yellow–red emission, covering a wavelength range spanning from 500 to 750 nm. More noteworthy, by simply manipulating the excitation wavelength or adjusting the temperature, the peak wavelength of the emission could be effectively tuned from approximately 600 to 660 nm, which could be attributed to the luminescence nature of the charge transfer (CT) between O 2− and Cu 2+ . Moreover, the phosphor material displayed a remarkable persistent luminescence (PerL) lasting up to 12 h after UV light excitation. Through thermoluminescence (TL) measurements and first-principle calculations, we found that the intrinsic defects, such as vacancies of oxygen and gallium (V O and V Ga ″ ), played important roles for the PerL phenomena. These findings highlighted the exceptional tunability and PerL properties of BaGa 2 O 4 :Cu 2+ . Our study provided a new potential guideline for the design of Cu 2+ -activated phosphors in visible region, and opened up new avenues for the research in related functional luminescence materials.
研究领域:
材料科学
·
光学
·
固体物理
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Weiwei Su,Juanjuan Yin,Ran Wang,Mengqian Shi,Ping Liu,Zhihui Qin,Ruirui Xing,Tifeng Jiao
At present, fluorescent hydrogels have attracted more and more attention due to their wide applications in medical diagnosis, biological imaging and drug delivery. However, the luminescence of traditional fluorescent hydrogels usually requires specific fluorophores, and most of the fluorophores were rigid planar structures containing benzene rings or heterocyclic structures, making traditional fluorescent hydrogels have higher cytotoxicity and lower water solubility, thus limiting their practical applications. Here, we reported a fluorescent hydrogel, which can generate hydrogen bonds without emitting specific fluorophores, and it was found that the fluorescence intensity could be strengthened with the increase of concentration. At the same time, the fluorescence emission peak has the response of excitation wavelength and is not affected by the pH and concentration. Therefore, this special discovery in present work opens new application prospects for fluorescent hydrogels.
研究领域:
材料科学
·
生物医学工程
·
分子生物学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2019
·
IF 4.309
Leipeng Li,Feng Qin,Lu Li,Hong Gao,Zhiguo Zhang
Optical ratiometric thermometry, based on the luminescence of trivalent rare-earth ions, has attracted considerable attention because of its noncontact working pattern, short response time, and strong antidisturbance ability. However, conventional optical thermal detection, on the basis of thermally linked states, has a relatively low relative sensitivity. To circumvent the limitation, here, a new strategy for boosting the relative thermal sensitivity, especially at relatively high temperatures, is introduced. It depends on two totally different mechanisms which own the contrary temperature dependences. For one thing, when excited at 310 nm, the green luminescence originating from CaWO4:Tb3+ phosphors increases monotonously because of the red shift of the charge-transfer band of the WO42– group. For another, this luminescence shows decreasing tendency gradually upon being directly excited at 380 nm. Thus, the intensity ratio between the luminescence obtained at two different excitation conditions is exploited for optical thermometry with success. By using this strategy, the relative thermal sensitivity is as high as 0.71% K–1 at 783 K, which is increased by more than fourfold compared with the conventional method that depends on the thermally coupled states of the Er3+ ion, which are the 2H11/2 and 4S3/2 states. Moreover, this value is also among the highest sensitivities reported so far for ratiometric thermal sensing. What is more, it has been demonstrated that the sensitivity can be adjusted easily by changing the excitation wavelength. Therefore, the work provides an effective strategy for boosting the thermal sensitivity for optical ratiometric thermometry, which contributes to highly sensitive thermal detection in the future.
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 Materials Chemistry C
·
2020
·Vol. 8
·期 20
·6710-6714
·
IF 7.059
Dong Li,Wentao Wu,Sasa Wang,Xinyuan Zhang,Lina Li,Yunpeng Yao,Yu Peng,Junhua Luo
White-light emissive hybrid perovskites have received continuous attention because of their potential applications in solid-state lighting and displays. However, there have been limited reports about dual-emissive white-light hybrid perovskites, although they enable a wide range of emission switching. Here, we report a one-dimensional hybrid perovskite, (N-AEP)2Pb2Cl10·H2O (NAPC, N-AEP = 1-piperazineethylammonium), which exhibits dual-emissive photoluminescence with a wide emission switch ranging from blue to orange. Significantly, tunable white-light emission from “cold” white light (0.25, 0.29) to “warm” white light (0.40, 0.42) can be easily observed by finely tuning the excitation wavelength. Under excitation at 335 nm, a “cold” white light with chromaticity coordinates (0.31, 0.33) close to those of “optimal” white light (0.33, 0.33) is achieved. Furthermore, NAPC exhibits a color rendering index reaching 93.4, which is among the highest values currently reported from white-light emissive hybrid perovskites. This work paves a way to tune the photophysical properties of hybrid perovskites, and highlights their potential for solid-state lighting applications.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2019
·Vol. 21
·期 3
·1-11
·
IF 2.009
Qin Ju,Zhang Limei,Yang Rui
In this paper, a novel fluorescence carbon dots (FCDs) were proposed to use folic acid as the sole reactant via the pyrolytic way. The gotten FCDs were uniform in size distribution and had an excitation-independent emission feature, and their fluorescence quantum yield was 39.09%. Without additional modification, the acquired FCDs could be used to detect isoniazid by the fluorescence quenching pattern. The reaction mechanism was the synergy of the internal filtration effect and the static quenching effect. The linear range of the detection of isoniazid was 4.0–140 μM, and the detection limit was 1.15 μM. Therefore, the method for the determination of isoniazid was put forward. The method was applied to the detection of isoniazid in isoniazid tablets with the recovery rates of 98.12 to 102.67%, and the results were satisfactory.
研究领域:
分析化学
·
药物分析
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Chen-Ting Zhu,Kai-Yuan Huang,Qing-Lin Zhou,Xiang-Ping Zhang,Gang-Wei Wu,Hua-Ping Peng,Hao-Hua Deng,Wei Chen,Hamada A.A. Noreldeen
Sulfonamides (SAs) are widely used in many fields because of their advantages, including low price, wide antibacterial spectrum, and high stability. However, their accumulation in the human body leads to a variety of serious diseases. Therefore, it is necessary to design a convenient, effective, and sensitive method to detect SAs. Moreover, the fluorescence excitation spectrum has rich information characteristics, especially for the interaction between fluorophore and quencher via various mechanisms. However, the excitation wavelength-guided sensor array construction does not draw proper attention. To address these issues, we used BSA-AuNCs as a single probe to construct a sensor array for the detection of five SAs. The selected SAs showed different quenching effects on the fluorescence intensities of BSA-AuNCs. The changes in the fluorescence intensity at different excitation wavelengths (λ = 230, 250, and 280 nm) have been applied to construct our sensor array and address the distinguishability between the selected SAs. With helping of pattern recognition methods, five different SAs have been identified at three different concentrations. Additionally, qualitative analysis at different moral ratios and quantitative analysis at nanogram concentrations have been considered. Moreover, the proposed sensor array was successfully used to distinguish between different SAs in commercial milk with an accuracy of 100 %. This study provides a simple and powerful approach to SAs detection. Also, it shows a broad application prospect in the field of food and drug monitoring.
研究领域:
分析化学
·
食品科学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yuchen Deng,Peng Li,Jiatong Li,Daolai Sun,Huanrong Li
Developing room-temperature phosphorescence (RTP) materials with color-tunability performance in an aqueous environment is crucial for application in optoelectronic areas to a higher stage, such as multicolor display, visual detection of external stimulus, and high-level information anticounterfeiting, but still faces a formidable challenge. Herein, we propose an efficient design strategy to develop excitation wavelength-responsive RTP supramolecular co-assembly systems of a simple benzoic acid derivative and Laponite (Lap) clay nanoplates in aqueous solution, displaying an ultralong lifetime (0.632 s) and a high phosphorescence quantum efficiency (18.04%) simultaneously. Experimental and theoretical research studies suggest that this distinctive feature is due to the generation of more and efficient intersystem crossing pathways benefiting from the coexistence of isolated and J-aggregation states via controlling the doping of the benzoic acid derivative and the inhibition of phosphorescence quenching by water because of the synergistic effects of robust hydrogen-bonding interactions between Lap and the benzoic acid derivative, J-aggregations of the benzoic acid derivative, and good oxygen tolerance of the Lap clay. By virtue of their excellent RTP performances in aqueous solution, the visual colorimetric detection of Ag+ in a water environment was achieved for the first time, and visible and high-level information encryption was accomplished as well.
研究领域:
材料科学
·
光化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xiang Li,Shuhong Xu,Fan Liu,Junfeng Qu,Haibao Shao,Zhuyuan Wang,Yiping Cui,Dayan Ban,Chunlei Wang
The growing demands for optical anti-counterfeiting technology require the development of new environmentally friendly materials with single component, multimodal fluorescence and high stability. Herein, the Bi/Sb codoped Cs2Ag0.1Na0.9InCl6 lead-free double perovskite material is reported as an efficient multimodal luminescence material with excitation-wavelength-dependent emission. When excited by 360 nm UV light, dual-emission is observed at 455 and 560 nm, which comes from the 3P1–1S0 transition of Sb3+ ions and self-trapped excitons (STEs), respectively. Under the 320 nm UV lamp, the microcrystals show only a blue emission centered at 455 nm. Therefore, the Bi/Sb codoped Cs2Ag0.1Na0.9InCl6 double perovskite emits blue and yellow lights under the 320 and 360 nm UV lamp, respectively. Moreover, the obtained double perovskite shows a high PLQY up to 41% and excellent stability against both air and high temperature, which make it a promising anti-counterfeiting material.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
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