MOLECULES
·
2023
·Vol. 28
·期 22
·7623
·
IF 4.6
Yangbo Wang,Yingdong Han,Runfa Liu,Cunping Duan,Huaiyong Li
Efficient control over lanthanide luminescence by regulating excitations offers a real-time and reversible luminescence-managing strategy, which is of great importance and highly desirable for various applications, including multicolor display and information encryption. Herein, we studied the crystal structure, luminescence properties, and mechanisms of undoped and Tb3+/Eu3+-doped CaZrO3in detail. The intrinsic purple-blue luminescence from host CaZrO3and the introduced green/red luminescence from guest dopants Tb3+/Eu3+were found to have different excitation mechanisms and, therefore, different excitation wavelength ranges. This enables the regulation of luminescent color through controlling the excitation wavelengths of Tb3+/Eu3+-doped CaZrO3. Furthermore, preliminary applications for information encryption with these materials were demonstrated using portable UV lamps of 254 and 302 nm. This study not only promotes the development of multicolor luminescence regulation in fixed-composition materials, but also advances the practical applications of lanthanide luminescent materials in visually readable, high-level anti-counterfeiting and information encryption.Keywords:luminescence;lanthanide;multicolor emission;luminescence regulation;information encryption
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
Small
·
2022
·Vol. 18
·期 11
·2106683
·
IF 15.153
Mengyan Cao,Xiujian Zhao,Xiao Gong
Conventional synthesis of carbon dots (CDs) mostly involves a hydrothermal or solvent-thermal reaction which needs relatively high temperature and pressure. In this work, ionic liquid is used to assist in fast synthesizing CDs with an ultrahigh photoluminescent quantum yield (98.5%) by heating at a low temperature (≤100 °C) and at atmospheric pressure. In addition, through this approach, tunable multicolor emissive CDs can be successfully achieved and used for preparing high-performance white light-emitting diodes. Theoretical computation proves that the activity of synthesis reaction can be significantly enhanced by ionic liquids. Density functional theory calculation reveals that the size and graphite nitrogen ratios of CDs have an effect on bandgap reduction, resulting in a redshift of the emission, which is in good agreement with the experimental results. This simple and promising approach for fast synthesis of tunable emissive CDs using ionic liquid affords the facilitation of CDs-based luminescent materials for fast manufacturing of functional devices.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
ACS Photonics
·
2023
·
IF 7
Mingjun Chen,Li Guan,Haotian Ma,You Zhang,Yufeng Chang,Fenghe Wang,Zhenyang Liu,Xu Li
As a new emerging ecofriendly light-emitting material, carbon dots (CDs) have been a research hotspot in the past decade. However, the synthesis of new types of CDs and the realization of multicolor solid-state emission remains challenging. Herein, we successfully synthesized a new type of N,Cl-doped CDs. The structure, morphology, composition, and optical properties, were well studied. The emission peak of fluorescent CDs solution can be modulated in the range of 512 to 613 nm by varying the concentration of CDs and the solvent type. To obtain a better emission of solid-state CDs, the as-prepared CDs are loaded on silica gel particles. Surprisingly, the solid-state CDs@silica can realize multicolor emission in the region of 521 to 600 nm by adjusting the ratio of CDs and silica. In addition, the single-component solar-simulated white light-emitting diode (WLED) was fabricated by using the CDs@silica particles as phosphor. The high quality of electroluminescence (EL) demonstrated the great potential of the CDs in the next generation of 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
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Dong Gao,Yusheng Zhang,Amin Liu,Yuda Zhu,Suping Chen,Dan Wei,Jing Sun,Zhenzhen Guo,Hongsong Fan
Multiple-color-emissive carbon dots (CDs) is one of the hotspots due to its potential in multi-fields. However, the exploring of efficient synthetic strategies and emission mechanisms still remain challenging. Herein, we report a facile solvothermal route to prepare CDs with tunable photoluminescence (PL) from green to red via a novel PL-tuning strategy of sulfur doping and water engineering. By detailed characterizations and comparison, it is demonstrated that the S doping can significantly increase the content of graphitic nitrogen, resulting in the fluorescence shifting from green to yellow; on the other hand, water engineering is able to yield carboxyl group and enhance surface oxidation degree, which can further facilitate the PL shifting from yellow to red. Owning to multicolor emissions and S doping, the prepared PL-tunable CDs present versatility in various applications including fluorescent films, light-emitting diodes (LED), bioimaging probe and highly sensitive Fe 3+ detector.
研究领域:
材料科学
·
生物医学工程
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Yingjie Mao,Zhichao Zhang,Guojun Zhou,Chen Fang,Yihan Liu,Denghui Xu,Jia Zhao,Aicong Geng,Jun Zhou
Zero-dimensional (0D) Mn(II)-based hybrids with the typical d–d transitions have been rapidly developed benefitting from the environmental friendliness, blue light excitation and the high thermal stability. Herein, we first designed two novel green-emitting 0D Mn(II)-based hybrids (C 16 H 28 N) 2 MnCl 4 and (C 21 H 46 N) 2 MnCl 4 , where the organic cations cocrystallize with four-coordinated [MnCl 4 ] 2- tetrahedrons. Upon blue-light excitation, these two crystals exhibited narrow-band green emission with distinct emission intensity and FWHM as well as thermal quenching behavior, which is analyzed by the influence of the crystal structure of different organic cations on the luminescence performance. Furthermore, multiple emission color can be observed from green to orange-red in (C 16 H 28 N) 2 MnCl 4 :Sb 3+ by regulating the [SbCl 5 ] 2- /[MnCl 4 ] 2- molar ratio or excitation wavelength. Our study not only enriches the influence of organic cations on crystal structure and luminescence performance, but also provides a new direction towards realizing the multi-color emission by Sb 3+ ions doping strategy.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2023
·
IF 2.7
Zhao Xiaoyu,Du Qian,Qiu Huiying,Zhao Yaqin,Wang Songbai,Li Junfen,Dong Chuan
In this work, bright yellow fluorescent and multifunctional carbon dots (N-CDs) were prepared by hydrothermal method from O-phenylenediamine and 4-aminobenzoic acid. The fluorescence characterization showed that the N-CDs possessed good optical properties (QY = 32%) and excitation dependent multi-color emission. By exciting with 390 nm, the strong selective interaction of VB 12 with N-CDs could result in a sharp decrease in the luminescence of N-CDs at 567 nm. An efficient fluorescence sensor in aqueous solution was constructed which could linearly respond VB 12 in wide concentration ranges of 0–90 μM and 140–250 μM. The linear correlation coefficients of N-CDs and VB 12 were 0.9950 and 0.9968, respectively, and the detection limit was 0.119 μM. N-CDs were performed for sensitive determination of VB 12 in real samples. Moreover, the N-CDs were exploited to image cell. This N-CDs was a sensitive fluorescence probe to monitor VB 12 and presented prospective potential in living cells imaging. Graphical abstract Schematic diagram of the synthesis process and application research of N-CDs
研究领域:
生物化学
·
分析化学
·
生物医学工程
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Dan Li,Chuilong Kong,Bo Hu,Wenbo Lou,Zaixing Yang
Latent fingerprint visualization is usually interfered by background fluorescence of substrates. The room temperature phosphorescent carbon dots (CDs) can effectively eliminate background fluorescence interference through their afterglow properties. However, developing CDs with multicolor room temperature phosphorescence (RTP) as fingerprint reagents remains a significant challenge. In this study, multicolor RTP CDs were synthesized via a facile one-step pyrolysis using benzamide and boric acid as precursors. The tunable phosphorescence color was achieved via regulating the amount of benzamide and reaction temperature. The prepared CDs were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), fourier transform infrared (FT-IR) spectra, X-ray photoelectron spectroscopy (XPS), ultraviolet-visible absorption spectra, and photoluminescence spectra. The results indicated that synthesized CDs were amorphous structures, sphere-like in shape with good dispersibility, and rich in functional groups on the surface. The three CDs exhibited blue, cyan, and green phosphorescence emission after UV lamp cessation. Based on the multicolor phosphorescence properties, the prepared CDs were successfully applied to interference-free development of latent fingerprints (LFPs) on various fluorescent substrate surfaces. All three CDs achieved high-quality fingerprint imaging on the selected substrates with well-defined details. Compared to single-color CDs, multicolor CDs could provide flexible selection for achieving high-contrast imaging on complex fluorescent substrates.
研究领域:
材料科学
·
分析化学
·
纳米技术
·
法庭科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 13
·8145-8153
·
IF 4.036
Yulei Gao,Xiang Di,Fenfen Wang,Pingchuan Sun
Amorphous polymer-based room temperature phosphorescence (RTP) materials exhibiting tunable emission colors have received tremendous attention and are extremely challenging to prepare. Herein, polyacrylamide-based RTP materials with tunable multicolor emission were prepared via copolymerizing phosphor with concentration dependent luminescence colors and acrylamide with different molar ratios. The hydrogen bonding interactions and chemically crosslinked structures in these polymers effectively restrict the mobility of phosphors and activate efficient RTP emission. The molar ratio of phosphor and acrylamide has a significant influence on the photophysical properties of these polymers, which can be used to fabricate multicolor materials. In addition, the RTP intensity decreases with increasing humidity due to the disassociation of hydrogen bonding by adsorption of water, manifesting as a humidity sensor. Benefiting from the distinguishable RTP lifetimes and the responsiveness to humidity, triple encoding for information encryption is successfully realized.
研究领域:
高分子化学
·
分析化学
·
材料科学
·
传感器技术
·
信息安全
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 12
·1023
·
IF 3.504
Dandan Ju,Feng Song,Adnan Khan,Feifei Song,Aihua Zhou,Xiaoli Gao,Huimin Hu,Xu Sang,Victor Zadkov
The dual-mode emission and multicolor outputs in the time domain from core-shell microcrystals are presented. The core-shell microcrystals, with NaYF4:Yb/Er as the core and NaYF4:Ce/Tb/Eu as the shell, were successfully fabricated by employing the hydrothermal method, which confines the activator ions into a separate region and minimizes the effect of surface quenching. The material is capable of both upconversion and downshifting emission, and their multicolor outputs in response to 980 nm near-infrared (NIR) excitation laser and 252 nm, and 395 nm ultraviolet (UV) excitation light have been investigated. Furthermore, the tunable color emissions by controlling the Tb3+-Eu3+ratio in shells and the energy transfer of Ce3+→Tb3+→Eu3+were discussed in details. In addition, color tuning of core-shell-structured microrods from green to red region in the time domain could be obtained by setting suitable delay time. Due to downshifting multicolor outputs (time-resolved and pump-wavelength-induced downshifting) coupled with the upconversion mode, the core-shell microrods can be potentially applied to displays and high-level security.Keywords:NaYF4:Yb/Er@NaYF4:Ce/Tb/Eu microrods;dual-mode emission;time-resolved emission spectra;multicolor emission
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Fang Li,Hao Peng,Nuotong Shen,Chen Yang,Limin Zhang,Bing Li,Jianbo He
Electrochemiluminescence (ECL) luminophores with wavelength-tunable multicolor emissions are essential for multicolor ECL imaging detection and multiplexed analysis. In this work, silver nanoparticle (Ag NP)-decorated graphitic carbon nitride (g-CN@Ag) nanocomposites were synthesized. The morphology, chemical composition, structure, and ECL property of g-CN@Ag were investigated. The prepared g-CN, g-CN@Ag1, g-CN@Ag5, and g-CN@Ag10 can produce blue, blue-green, chartreuse, and yellow colored ECL emissions, respectively, by using K2S2O8 as the coreagent. The ECL emission wavelength of g-CN@Ag can be regulated from 460 to 565 nm by modulating the content of the immobilized Ag NPs. Then, a multicolor ECL detection array was fabricated by using g-CN, g-CN@Ag1, g-CN@Ag5, and g-CN@Ag10 as four ECL luminophores. Dopamine was detected based on its inhibition effect on the multicolor ECL emissions. The linear range is from 0.1 nM to 1 mM with the lowest detection limit of 44 pM. Then, machine learning-assisted multiparameter concentration prediction of dopamine was further carried out by combining the deep neural network (DNN) algorithm. This work provides a new avenue to regulate the ECL emission wavelength of g-CN by using the metal nanoparticle modification strategy and presents an effective machine learning-assisted multicolor ECL detection strategy for accurate multiparameter quantitative detection.
研究领域:
分析化学
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2015
·Vol. 17
·期 23
·15412-15418
·
IF 4.493
Jun Liu,Huawei Deng,Zhanyun Huang,Yueli Zhang,Dihu Chen,Yuanzhi Shao
Manipulation of upconversion (UC) emission is of particular importance for multiplexed bioimaging. Here, we precisely manipulate the UC color output by utilizing the phonon-assisted energy back transfer (EBT) process in ultra-small (sub-10 nm) Gd2O3:Yb3+/Er3+ UC nanoparticles (UCNPs). We synthesized the Gd2O3:Yb3+/Er3+ UCNPs by adopting the laser ablation in liquid (LAL) technique. The synthesized Gd2O3:Yb3+/Er3+ UCNPs are small spherical and monoclinic structures. Continuous color-tunable (from green to red) UC fluorescence emission is achieved by increasing the concentration of Yb3+ ions from 0 to 15 mol%. A phonon-assisted energy back transfer (EBT) process from Er3+ (4S3/2 → 4I13/2) to nearby Yb3+ (2F7/2 → 2F5/2), which can significantly enhance red emission at 672 nm and decrease green emission, is responsible for the color-tunable UC emission by increasing the Yb3+ concentration in Gd2O3:Yb3+/Er3+ UC nanoparticles.
研究领域:
纳米医学
·
生物成像
·
光功能材料
·
分子影像学
·
转化医学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Yongsheng Yang,Changxing Wang,Siyuan Tang,Da Chen,Xiameng Li,Zhao Peng,Chenjie Gu
Recently, graphene quantum dots (GQDs) with polychrome emission capability have attracted much attention due to their multifarious applications. In this study, we report a facile and green approach for rapid preparation of multicolor emission GQDs. Experimentally, UV light was used to drive the low-temperature synthesis, and a tunable emission wavelength of the GQDs was achieved through the synergistic effect of solvatochromic tuning and sulfur doping. Results show that multicolor emission wavelengths of green-GQDs (G-GQDs) from blue to yellow are obtained by simply controlling the polarity of the surrounding solutions. Moreover, red-GQDs with the emission wavelengths extended from green to red are further obtained by sulfur doping. Thereafter, G-GQDs were used to develop a trace water-detecting platform, ascribed to the high sensitivity of water-quenchable fluorescence, and a low detection limit of 0.061% was achieved. Meanwhile, based on the outstanding multicolor tunability of as-prepared GQDs, we successfully manufactured multicolor solid fluorescence films to fabricate multicolor light-emitting diode (LED) devices. Furthermore, high-quality white LEDs (WLEDs) are fabricated with the CIE coordinates of (0.341, 0.354) and a color temperature of 5161 K. This study highlights the potential of GQDs in various applications, including solid-state fluorescence films, optoelectronics, and optical molecular sensing.
研究领域:
材料科学
·
纳米技术
·
光电技术
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）