JOURNAL OF FLUORINE CHEMISTRY
·
2022
·
IF 2.226
Xuegang Zheng,Ying Chen,Shusheng Pan,Zhiyu Liu,Dekang Xu,Yueli Zhang,Hao Lin
In this paper, a range of Yb 3+ /Tm 3+ /Ho 3+ triple-doped NaYF 4 microcrystals (MCs) were successfully prepared by hydrothermal method and characterized by X-ray diffraction, which proved to be a hexagonal phase structure with uniformity. The morphology of NaYF 4 :20% Yb 3+ , 1% Ho 3+ MCs with different doping amounts of NaOH and citric acid were studied using scanning electron microscope, and the distribution of elements of this doping system was characterized by energy dispersive spectrometer. Upconversion luminescence (UCL) spectra of the MCs using a fluorescence spectrometer with 980 nm excitation were researched, and the results demonstrated that the tunable multi-color of the MCs can be achieved by varying the doping amount of different rare-earth ions. The UC mechanism of the MCs were systematically described. Li + doped the series MCs improved their UCL efficiency. By investigating the UCL the MCs of the Li + -doped system, the emission intensities of blue (450 nm, 475 nm), green (541 nm), and red (648 nm) light of the series MCs were increased by 2.75, 2.095, 2.65, and 2.87 times, which is of great significance for its application in light-emitting diodes and solar cells.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Lina Liu,Kai Cui,Fuqiang Song,Daoyuan Wang,Baoyan Wang,Xiaoliang Tang
Color-tunable luminescent hydrogels have shown significant potential in smart display devices, data encryption and multilevel anti-counterfeiting due to their excellent flexibility, functional versatility and optical properties. However, developing hydrogels that exhibit prominent optical decryption capabilities while maintaining robust mechanical properties remains a challenge. Herein, we present an Al3+ stimulus-triggered luminescent hydrogel with the integrated properties of wide multi-color tunability, self-healing capacity, high strength (160%) and an impressive toughness (180 kJ m−3). The double-network in the hydrogel with rich hydrogen bonds is well compatible with various luminophores. These include luminescent layered rare earth hydroxide nanosheets (LRH NSs) with red/green (R/G) emission and a chemosensor molecule that displays a fluorescence “turn-on” change in blue (B) emission only in the presence of Al3+ as a stimulus. Consequently, this smart hybrid hydrogel not only provides an adjustable tool for tuning the visible color of soft materials based on orthogonal responsive R/G/B three-primary-color luminescence, but also acts as a specific key for enabling color-switchable anti-counterfeiting and information encryption/decryption. These unique optical properties of the luminescent soft material highlight its potential as a hydrogel-based functional platform for the development of intelligent and color-tunable cryptographic devices with low cost, facile synthesis, and good processability.
研究领域:
材料科学
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光学工程
·
化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Aiguo Rao,Shiyu Zhang,Junjie Hu,Luyi Zheng,Qi Yao,Kai Lin,Chunhui Niu,Lei Wang,Mingqing Yang,Yong Lv,Qingshan Chen
In recent years, Fabry-Perot (F-P) cavity-type electrochromic devices composed of more stable inorganic materials have been extensively investigated for achieving colorful reflective displays and military camouflage functions. However, the majority of reported substrates for colorful F-P cavity electrochromic devices are rigid conductive glasses, which hinders their practical application in flexible reflective displays and camouflage. Herein, we construct a WO 3 /W/Au bilayer F-P cavity multicolor tunable electrochromic device based on a flexible porous filter membrane, in which WO 3 , an inorganic electrochromic material, is used as the electrochromic layer, metallic W as the partial reflective layer, and metallic Au as the total reflective and conductive layer. Highly flexible bilayer F-P cavity multicolor electrochromic devices have been prepared by combining UV-curable electrolytes and thermoplastic sealing procedures. By adjusting the thickness of the WO 3 layer, a wide spectrum of colors including yellow, purplish red, violet, blue, green, olivine, peach, etc. can be obtained. In addition, by adjusting the driving voltage of the electrochromic device, more precise color adjustment can be achieved. The electrochromic device has a fast coloring (2.06 s) and bleaching (2.70 s) response time, providing a new solution for future flexible colorful reflective display devices.
研究领域:
材料科学
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光学工程
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电子工程
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 22
·7397-7405
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IF 4.174
Jie Chen,Yixin Gao,Haifeng Jiang,Yan Liu,Zhaohui Jin
Optimizing structure and varying doped ions are two main strategies to obtain excellent luminescence performance. Spherical morphology is considered to be the most ideal phosphor structure due to the least surface defects. Herein, a series of spherical and monodispersed Dy3+/Eu3+ co-activated SiO2@Gd2O3 core–shell phosphors with multicolor tunable luminescence were successfully prepared via a facile urea assisted precipitation method. Related chemical reactions and the possible growth mechanism of Gd2O3:Ln3+ directional deposition on the surface of SiO2 microspheres were put forward. Upon 273 nm UV radiation excitation, SiO2@Gd2O3:Dy3+ and SiO2@Gd2O3:Eu3+ samples exhibited characteristic yellow (4F9/2–6H13/2) and blue (4F9/2–6H15/2) emissions of Dy3+ and red (5D0–7F2) emission of Eu3+, respectively. Meanwhile, multicolor emissions (warm white, yellow and orange) could be easily obtained by modulating the relative content of Dy3+ and Eu3+ in SiO2@Gd2O3:Ln3+ samples under a single excitation wavelength. Moreover, it was confirmed that Dy3+ could transfer energy to Eu3+ in the form of quadrupole–quadrupole interaction and further improved the luminescence intensity of Eu3+ by comparing experimental data with theoretical calculations. These results imply that tunable luminescence Dy3+,Eu3+ co-doped SiO2@Gd2O3 microspheres have great potential applications in multicolor displays and biolabeling fields.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
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2024
·
IF 8
Zhihao Guan,Zhaorun Tang,Jianwen Zeng,Junjie Deng,Yuewei Zheng,Houbin Li,Xinghai Liu
Long-life room temperature phosphorescent (RTP) materials hold significant potential in the fields of optoelectronic devices, information encryption, and bio-imaging due to their excellent optical properties. However, achieving multi-color tunable RTP materials has proven challenging. In this study, molecular engineering strategies are employed to select precursor molecules with varying degrees of conjugation such as phthalic anhydride (PA), naphtho[2,3-c] furan-1,3-dione (23NA), and naphthalic anhydride (NA). By combining these guest molecules with a host boric acid matrix through a one-step microwave method, carbon dots (CDs)composites (PA@BA, 23NA@BA and NA@BA) exhibiting excellent RTP properties are successfully prepared. As the degree of precursor conjugation increased gradually, the phosphorescence color modulation of the composites demonstrates satisfactory transitions from blue to yellow. Notably, CDs are derived in situ within the boric acid matrix while covalent and hydrogen bonds formed between CDs and borate matrix effectively suppress nonradiative leaps and facilitate composite RTP activation. Furthermore, the boric acid matrix acts as insulation against oxygen diffusion and prevents quenching of triplet excitons by external factors. The rationality behind phosphorescence emission mechanism and wavelength modulation is further conformed by density functional theory (DFT) calculations. Finally, CDs composites are successfully applied for advanced message encryption of text and images.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Yun Zhao,Bingli Gu,Guoqiang Guo,Yanshuang Li,Tingting Li,Yuejin Zhu,Xu Wang,Da Chen
The development of multicolor tunable emission graphene quantum dots (GQDs) is important for their application in photoelectric devices and multicolor anticounterfeiting. Herein, we synthesize blue (B-GQDs), green (G-GQDs), and red GQDs (R-GQDs) via a solvothermal reaction. The B-, G-, and R-GQDs exhibit excitation-independent behavior, excellent fluorescence properties, and exceptional photostability. The relative quantum yields (QYs) for the B-, G-, and R-GQDs are 68, 62, and 27%, respectively. Structural characterization and theoretical calculations indicate that the quantum size effect adjusts the red shift of emission from B-GQDs to G-GQDs, and the increased content of oxygen and C═N bonds are answerable for the red emission of R-GQDs. Then, we apply the prepared multicolor GQDs as a fluorescent ink for pattern printing and multicolor anticounterfeiting. Moreover, B-, G-, and R-colors and white light-emitting diodes (LEDs) are fabricated by ultraviolet radiation as excitation. The white LEDs exhibit a color coordinate of (0.335, 0.343), a high color rendering index of 95, and a correlated color temperature of 4835 K. This research successfully expands the potential application of GQDs in the reliable anticounterfeiting, information security, and high color rendering index GQD-based LEDs.
研究领域:
材料科学
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光电技术
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信息安全
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Shaochen Sun,Tianyu Li,Yan Zhu,Guangqun Wang,Faqu Yin,Fei Li,Farong Tao,Liping Wang,Guang Li
Environmentally friendly natural polymer-based room temperature phosphorescence (RTP) materials exhibit promising applications in anti-counterfeiting and information encryption. However, the construction of natural polymer-based RTP materials with multicolor long afterglow and even persistent near-infrared (NIR) luminescence remains a tough challenge. Here, starch ( S )-based ultralong RTP materials with wide color-tunability, persistent NIR luminescence are conveniently prepared through Förster resonance energy transfer (FRET) strategies. The binary doping system S-4-carboxyphenylboric acid with an ultralong phosphorescence lifetime of up to 449 ms is used as energy donor, and commercial dyes fluorescein, rhodamine 6G and lissamine rhodamine B (LRB) are selected as energy acceptors. By adjusting the weight ratio of energy donor and acceptor, tunable multicolor long afterglow from blue to yellow-green, purple, red and even nearly white (0.32, 0.33) can be successfully achieved through the triplet-to-singlet FRET process. The quaternary doping system displays persistent NIR luminescence band from 650 to 800 nm along with the longest phosphorescence lifetime of up to 131 ms via the stepwise FRET process using LRB as the intermediate energy acceptor and NIR dye Nile blue A as the energy acceptor. Satisfactorily, the prepared S-based RTP materials with wide-range color-tunable long afterglow demonstrate potential applications in multimode information encryption and anti-counterfeiting.
研究领域:
材料科学
·
光学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Shijie Liao,Zhou Li,Lumin Ren,Tengfei Lin,Cong Lin,Chunlin Zhao,Min Gao,Xiao Wu
The coordination of multiple luminescent centers in a simple and efficient way is a difficult challenge for realizing the tunable multicolor function of fluorescent hydrogels. In this work, we synthesized a fluorescent hydrogel with multicolor conversion via a “one-pot method,” which greatly simplifies the tedious steps of preparing fluorescent hydrogels. The luminescence intensity and color of the synthesized DPA-Eu/TPE@PVA hydrogel can be modulated by various stimuli, such as the excitation wavelength, pH, and presence of Fe3+ ions. The entire work centers on the rational introduction of the light-emitting molecule tetrakis(4-hydroxyphenyl)ethylene (TPE-4OH) and the lanthanide ionic complex 2,6-pyridinedicarboxylic acid-Eu (DPA-Eu) into the poly(vinyl alcohol) (PVA) polymer network. Since the luminescence mechanisms of these two molecules differ, with the former emitting light with the aid of the aggregation-induced emission (AIE) effect and the latter emitting light through energy transfer via metal dynamic coordination bonds, individual luminescent molecules can be controlled independently under specific stimuli. The realization of this tunable multicolor fluorescence function has contributed to its application in fields such as sensors, probes, and information encryption.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 29
·期 25
·1804160
·
IF 15.621
Ming Wu,Long Yan,Ting Wang,Bo Zhou,Qinyuan Zhang
Photon upconversion multiplexing has attracted increasing interest in recent years; however, realizing the red color–based multicolor-tunable output in upconversion nanoparticles (UCNPs) at a fixed composition remains a huge challenge. Here, a novel and versatile approach to fine-control upconversion luminescence (UCL) colors from UCNPs through selectively confining specific excitation energy by the photon blocking effect is reported. Four types of dual-color switchable UCNPs capable of emitting red-blue and red-green emissions are successfully designed following this strategy, and their UCL performance shows a multiwavelength (808/980/1550 nm) excitable feature that is well sustained in a wide range of excitation power density. The use of the photon blocking effect further enables the dynamically switchable red-green-blue UCL with 808/980 nm excitations. These findings provide a general method to achieve multicolor-tunable UCL at a single nanoparticle level. Moreover, the UCNPs with red-based multicolor emissions in this work enriches the upconversion system and should have potential applications in display, anti-counterfeiting, and bioimaging.
研究领域:
材料科学
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光学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Ying-Ying Pei,Jin-Tao Wang,Lin Yuan,Yi Luo,Xin-Yue Niu,Xing Rong,Lin Jin,Qing-Feng Li
Protein hydrogels have attracted increasing attention because of their excellent biodegradability and biocompatibility, but frequently suffer from the single structures and functions. As a combination of luminescent materials and biomaterials, multifunctional protein luminescent hydrogels can exhibit wider applications in various fields. Herein, we report a novel, multicolor tunable, injectable, and biodegradable protein-based lanthanide luminescent hydrogel. In this work, urea was utilized to denature BSA to expose disulfide bonds , and tris(2-carboxyethyl)phosphine (TCEP) was employed to break the disulfide bonds in BSA to generate free thiols. A part of free thiols in BSA rearranged into disulfide bonds to form a crosslinked network. In addition, lanthanide complexes (Ln(4-VDPA) 3 ), containing multiple active reaction sites, could react with the remaining thiols in BSA to form the second crosslinked network. The whole process avoids the use of nonenvironmentally friendly photoinitiators and free radical initiators. The rheological properties and structure of hydrogels were investigated, and the luminescent performances of hydrogels were studied in detail. Finally, the injectability and biodegradability of hydrogels were verified. This work will provide a feasible strategy for the design and fabrication of multifunctional protein luminescent hydrogels, which may have further applications in biomedicine , optoelectronics, and information technology.
研究领域:
生物医学
·
光学材料
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2024
·
IF 4.1
Weibo Zhang,Xiaoyi Hou,Zheng Sun,Jing Yang,Peng Li
Developing solution-processable room-temperature long afterglow (RTLA) materials with multi-color tunable emissions based on an inorganic matrix is of considerable practical importance in diverse applications but rarely reported. Herein, a series of water-soluble multicolor afterglow materials (t@LP@Rh123, t@LP@Rh6G, t@LP@RhB, respectively) with afterglow emission colors of green, orange-yellow and red were achieved through triplet-to-singlet Förster-resonance energy transfer (T 1 -S 1 FRET), where the cyan afterglow material t@LP obtained by solventless mechanical grinding method of 4-[2,2':6′,2″-Terpyridin]-4′-ylbenzoic acid and Laponite (LP) was used as an energy donor, and fluorescent dyes Rhodamine 123, Rhodamine 6G and Rhodamine B were used as energy acceptors. Notably, the obtained series of multicolor afterglow materials still exhibit obvious afterglow emission in aqueous solution, which make them potentially useful in the fields of anti-counterfeiting and multilevel information encryption.
研究领域:
材料科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Optical Materials
·
2023
·
IF 0
Dan Li,Hongbo Xia,Wen Xu,Jianshan He,Xiumei Yin,Rongjie Liu,Bin Dong
Lanthanide-doped upconversion nanoparticles (UCNPs) exhibit abundant emission wavelengths under near infrared (NIR) excitation. This property enables UCNPs to have potential for multicolor output. However, the realization of multicolor-tunable emission output in UCNPs at a fixed composition has remained challenging. Here, a luminescent color controller that can dynamically control the upconversion luminescence (UCL) colors from UCNPs is reported. By constructing bilayer photonic crystals (PCs) in which the UCNPs are distributed between the two-layer PCs, the propagation of green and red emission can be modulated by the top and bottom PCs, respectively. Moreover, the photonic bandgap (PBG) could be varied by changing the reflected angles, according to Bragg diffraction. Thus, the variation in the viewing angles also results in the yellow to blue and red to cyan structural color changes on the top and bottom bilayer PC-UCNPs-PC films. Correspondingly, the emission color outputs are changed from red to yellow-green and green to yellow-green, respectively. These findings provide a general method to achieve multicolor-tunable UCL by a bilayer PC-UCNPs-PC film. Moreover, the UCNPs with multicolor emissions in this work enrich the upconversion system and should have potential applications in display and anticounterfeiting.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
DOI
危险品化学品经营许可证（带存储）