DYES AND PIGMENTS
·
2020
·
IF 4.613
Sujie Han,Xipao Chen,Yaoping Hu,Lei Han
As a newly discovered photoluminescent material, carbon dots (CDs) have shown promising performance in many fields. However, due to aggregation-caused fluorescence quenching, most of CDs are poorly emissive in the solid state, which severely restricts their wide applications, especially in the optoelectronic devices . To overcome this problem, herein, we design a novel kind of self-quenching-resistant N , P -doped CDs, using polyethyleneimine (PEI), phosphoric acid , and ethanol as raw ingredients. The as-synthesized CDs are amorphous and contain abundant surface PEI chains which properly separate the individual carbon core and prevent the direct π–π interaction. Such a unique structure conquers self-quenching during aggregation, and gives CDs a bright blue fluorescence in solid state without any other additional matrices. By taking advantage of their excellent optical properties , the CD powers, combined with red emissive europium metal-organic frameworks, are successfully employed as hybrid phosphors for construction of white light-emitting diodes exhibiting a Commission Internationale de L'Eclairage (CIE) coordinate of (0.33, 0.33).
研究领域:
材料科学
·
光学工程
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产品关联
DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2022
·Vol. 32
·期 2
·783-789
·
IF 2.525
Xu Lina,Yao Na,Ding Haiyang,Yang Xiaohua,Li Shouhai,Xia Jianling,Li Mei
Selective and sensitive water content measurement in organic solvents is extremely significant for both industrial use and laboratory preparation. Carbon nanodots are promising carbon nanomaterials with unique and novel properties and thus have drawn growing attention. However, the hydrothermal approach for the preparation of carbon dots always uses water as solvent, and consequently, the development of carbon dots from biomass materials for fluorescence detection of water content remains unexplored. Here, carbon dots were prepared from gallic acid via a cheap and facile one-step method. The as-prepared carbon dots present excellent sensitivity and selectivity toward water content and exhibits good linear relationships with water content in range of 0–10%. The carbon dots demonstrated a strong antioxidation capacity and colour-reaction of Fe 3+ like gallic acid. The carbon dots also showed solid-state lighting.
研究领域:
材料科学
·
分析化学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 42
·27199-27205
·
IF 4.036
Xuejing Wang,Yinyan Yuan,YiXiao Sun,Xue Liu,Mingze Ma,Renyin Zhang,Feng Shi
The development of luminescent materials greatly affects the development of fluorescence imaging technology. The preparation of carbon dots (CDs) with high photoluminescence quantum yield (PLQY) in the solid-state is challenging due to excessive resonance energy transfer (RET) and direct π–π interactions. In this study, we synthesized carbon dots that exhibit green fluorescence (GCDs) with absolute PLQYs up to 35.65% in one step by a microwave-assisted method. In the solid-state, the absolute PLQY reached 19.25%. Then, the GCDs were mixed with soluble starch in appropriate proportions, which improved the adsorption and dispersion of the GCDs and greatly reduced the cost of the fingerprint powder, and increased the absolute PLQY of the fingerprint powder to 41.75%. Finally, we prepared GCDs for preliminary fabrication of luminescent films, and the GCD-starch powder was successfully applied to high-quality latent fingerprint (LFP) imaging. The related properties of GCDs and the LFP detection performance of fingerprint detection powders prepared by GCDs were studied in detail. The results showed that the LFP system developed with GCDs-starch powder visualized LFPs with high definition and contrast under different conditions, and GCDs had potential for application in light-emitting devices. This study developed a new type of solid-state luminescent CDs and demonstrated that these GCDs have great application potential for LFP detection. This study may also provide inspiration for other applications based on efficient solid-state fluorescence.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBON
·
2024
·
IF 10.5
Xiao Gong,Yunhui Wu,Jiurong Li,Shiwei Zhang,Min Wu
As a new type of zero dimensional carbon based fluorescent nanomaterial , carbon dots (CDs) have been studied and developed for many years. Various methods have been explored to prepare multicolor CDs to achieve tunable fluorescence of CDs. However, synthesizing fluorescent CDs located in the long wavelength emission region remains a challenge. Here, through a simple one-step solvothermal method using anhydrous citric acid (CA) as the raw material, ZrCl 4 as both a metal element dopant and an inorganic salt matrix, and NH 3 ·H 2 O as nitrogen source, Zr-doped CDs (Zr-CDs) solution with long wavelength fluorescence emission and solid powders with blue fluorescence can be obtained simultaneously. By optimizing the usage of ZrCl 4 , the fluorescence emission of the prepared CDs red shifted from 596 nm to 650 nm. The introduction of Zr 4+ can cause a significant redshift. In addition, based on the sensitivity of CDs to oxygen, they can be used for the detection of trace amounts of H 2 O 2 . When using metal-organic framework (MOF) to encapsulate the Zr-CDs which is in the solution, optically stable CD@MOF powders can be obtained, which can be used for the construction of red light-emitting diodes (LEDs), demonstrating its potential application in the field of solid-state lighting. The synthesis technology is expected to provide favorable technical support for the future development of CDs.
研究领域:
材料科学
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化学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2018
·
IF 3.767
Xueyan Wu,Jixi Guo,Wei Jia,Jianzhang Zhao,Dianzeng Jia,Huici Shan
A facile and efficient method is described to greatly improve the emission efficiency of anthracene- o -carborane dyad by linking two o -carborane building blocks together through tailored alkyl linkages. Improvement of the emission efficiency of the tethered anthracene- o -carborane dyads was achieved with the quantum yield up to 40.8% and 51.4% for BCAC4 and BCAC6 respectively, in contrast to that of CAH (4.3%) and CAA (36%), demonstrating that the cooperation advocates that one plus one is much bigger than two. In addition, these developed emissive AIE luminogens exhibit impressive response to the environmental stimuli of viscosity and temperature. DFT calculations were carried out to explore the influence of the anthryl and alkyl linkages on emission efficiency. Our materials and concepts are useful as a guideline for designing o -carborane-containing highly-efficient solid luminescent materials with stimuli-responsive properties.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2023
·
IF 4.5
Yijie Wang,Linbo Yu,Tingjie Lv,Jing Wang,Shengju Zhou,Xiaofeng Sun
Circularly polarized luminescence (CPL) materials are a hot research in the field of chiral luminescent materials . Carbonized polymer dots (CPDs) have attracted more and more attention due to their tunable photoluminescence , high photostability, low cost and excellent biocompatibility. These outstanding properties of CPDs make them have bright prospects in the field of CPL. However, due to the aggregation-caused quenching of CPDs, it is difficult to simultaneously achieve solid state luminescence and CPL of solid CPDs itself. In this work, we have employed p-phenyldiacetonitrile and terephthalaldehyde/isophthalaldehyde as carbon source precursors, L-/D-tryptophan as chiral precursors to prepare chiral CPDs with different luminescence ,colors which can simultaneously achieve solid state luminescence and CPL of solid CPDs itself for the first time.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Lan Yu,Zheng Guang-Song,Song Run-Wei,Hao Jing-Nan,Liu Jia-Lu,Shen Cheng-Long,Zhu Jin-Yang,Cao Sheng,Zhao Jia-Long,Lou Qing,Shan Chong-Xin
Fluorescent carbon dots (CDs) have garnered significant attention for their unique optoelectronic properties and applications, but their practical employment is hampered by the excessive synthesis temperature, tedious post-processing and limited solid-state luminescence efficiency. Herein, we develop a facile molten salt method to achieve the one-step synthesis of full-color CDs with efficient solid-state emission. Comprehensively, kilogram-scale solid-state CDs with a quantum yield of 90% can be readily synthesized via a salt-assisted approach under mild conditions (100–142 °C) within 10 min. The spectral characterization and density functional theory calculation confirm that zinc ion coordination can occur in liquated environment, which facilitates the polymerization of precursors at lower temperatures, suppresses the formation of non-radiative recombination channels on their surface, and further enhances luminescence in solid. The machine learning is further used to optimize CDs’ luminous efficiency up to 99.86%, evoking excellent performance CDs-based light-emitting diodes with a maximum luminous efficiency of 272.65 lm W –1 to drive backlit display with a long-persistent lifetime (T 95 at 100 cd m –2 = 45108.7 h). This work provides a pathway for the design and fabrication of advanced carbon-based solid-state luminescent materials, significantly contributing to the advancement of next-generation lighting and display technologies.
研究领域:
材料科学
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纳米技术
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光电子学
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化学合成
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机器学习
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显示技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Bai-Chen Liu,Bo Tu,Dong-Jin Qian
Photoluminescence regulated by the Förster resonance energy transfer (FRET) process attracts much attention for the development of novel luminescent materials and devices. Here, an efficient FRET system has been designed and constructed with the use of aggregation-induced emission (AIE) units as the energy donor and sulforhodamine B (SRB) as the acceptor in the aggregates, mixed solid powders, and Langmuir–Blodgett (LB) films. Two amphiphilic tetraphenylethene derivatives with octyl chains (C8TPEs) are synthesized and used as AIEgens, which can form well-organized mixed monolayers with arachidic acid (AA) on the SRB subphase surfaces. Efficient photoinduced energy transfer is observed from AIEgens to SRB in the C8TPE/SRB powders and C8TPE-AA/SRB hybrid LB films, with the luminescent colors changing from green through yellow to orange. The differences in their FRET behaviors are interpreted in terms of the highest occupied molecular orbital–lowest unoccupied molecular orbital (HOMO–LUMO) energy gaps, absorption spectra, and intramolecular charge transfer characteristics by time-dependent density functional theory calculations. It is further revealed that by controlling the SRB concentrations in the subphase, the luminescent emission wavelength for the C8TPE-AA/SRB hybrid LB films shifts from 490 to 592 nm, that is, from typical AIE to SRB emission. Therefore, this work provides a viable strategy for developing solid-state FRET systems by combining AIEgens’ donor with aggregation-caused quenching type acceptors, highlighting their potential in optoelectronic and sensing applications.
研究领域:
材料科学
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光物理学
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纳米科技
·
表面化学
·
分子光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Ying Liu,Jiantong Li,Xueying Zhang,Chiyu Wang,Manman Zhang,Xianrui Meng,Dun Liu,Wenkai Zhang,Jishi Wei,Gil Ju Lee
Silane- or siloxane-functionalized carbon dots (SiCDs), a unique subclass of carbon nanomaterials modified with silane or siloxane groups, offer solid-state luminescence, solution processability, and chemical reactivity, making them promising candidates for optical coatings, displays, and security technologies. However, the precise patterning of carbon dot materials remains underdeveloped, limiting their integration into advanced photonic and anticounterfeiting systems. In this work, we present a scalable thermal nanoimprinting strategy to fabricate high-resolution, luminescent micro- and nanostructures using SiCDs as both emissive materials and imprintable resists. The SiCDs are synthesized via a solvothermal method using citric acid and urea as carbon sources and 3-glycidyloxypropyltrimethoxysilane (GPTMS) as a siloxane-functionalizing agent. By varying the feed ratio of citric acid to GPTMS, the carbon core and surface fluorophore of SiCDs can be effectively tailored, enabling enhancement of their solid-state photoluminescence quantum yield, optical transmittance, and gelation temperature. Using SiCDs as the imprint resist, microstructures, including micropillars and gratings with feature sizes ranging from 2 to 50 μm, are fabricated by thermal nanoimprinting. The resulting patterns exhibited excellent fidelity, surface properties, and thermal stability. Furthermore, a dual-mode anticounterfeiting surface is constructed by combining nanoimprinting with screen printing, enabling dynamic angle-dependent holography and UV-excited fluorescence within a single patterned film. This study highlights the potential of SiCDs as a multifunctional material platform for solid-state luminescent patterning and positions carbon dot patterning as a rising frontier in nanophotonics and optical security.
研究领域:
纳米光子学
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材料科学
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光学工程
·
化学合成
·
安全技术
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Jingjing Han,Yangbao Miao,Jing Cuan,Hui Zhou,Shihao Zhu,Zixian Wu,You Zhou
The reporter–spacer–receptor (RSR) approach is prevalent to develop molecular turn-on sensors. However, the fluorescent RSR sensors barely operate in solid state, which hinders their fabrication into devices for practical applications. Herein, we present a novel strategy to achieve solid-state luminescence turn-on sensing by assembling RSR architectures within MOF frameworks. Unlike the regular RSR systems, the framework-confined fluorophore and receptor are well arranged and separated even in the solid state. This concept is illustrated by a multicomponent MOF (Fc@NU-1000), which contains organic linkers with a highly luminescent pyrene core as the reporter, Zr6 nodes with unsaturated sites as the receptor, and the incorporated Fc molecules as the quencher. The separate incorporation of pyrene core and Fc in the multicomponent MOF favors an efficient pseudointramolecular photoinduced electron transfer (PET) process, resulting in significant luminescence quenching. Interestingly, such PET process can be blocked via the quencher displacement initiated by the phosphate analyte, therefore recovering the solid-state luminescence of MOF microcrystals. We found that Fc@NU-1000 is shown as a sensitive solid-state luminescence turn-on probe for phosphate with the naked-eye response at a low content. What’s more, this study is the first example of confining a quencher displacement-based RSR system in the MOF framework for solid-state luminescence turn-on sensing, thus also providing new opportunities for MOF materials to develop luminescence turn-on sensors.
研究领域:
材料科学
·
化学传感器
·
分子工程
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Kewei Ma,Yuhang Sheng,Guizhen Wang,Xiaowei Zhang,Yunsong Di,Cihui Liu,Liyan Yu,Lifeng Dong,Zhixing Gan
Mn 2+ doping has been developed to modulate the photoluminescence (PL) of CsPbCl 3 perovskite quantum dots (PQDs). However, the doped Mn 2+ may be expelled from the PQDs host with the long-term storing, resulting in inferior stability. Herein, CsPbCl 3 PQDs doped with different concentrations of Mn 2+ (Mn:CsPbCl 3 ) are prepared by a hot injection method. Our photostability tests reveal that when the doping concentration is <25%, or 40%–50%, the Mn 2+ doped PQDs are intrinsically stable. Anion exchange reactions are conducted between the stable CsPb 0.796 Mn 0.204 Cl 3 and CsPbBr 3 PQDs. Fluorescence color gamut of the resulting Mn:CsPb(Cl/Br) 3 PQDs almost covers the entire visible spectrum except for the deep red color. Benefiting from the intrinsic stability and wide color gamut, multicolor solid-state luminescence are acquired by incorporating the Mn:CsPb(Cl/Br) 3 PQDs in polymethyl methacrylate (PMMA) matrices, which are used as color converters for constructing light-emitting diodes (LEDs) with different colors.
研究领域:
材料科学
·
光电技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 38
·5380-5392
·
IF 2.6
Haonan Li,Chenping Gao,Zhibin Li,Yanchun Guo,Shuxia Cao,Yufen Zhao
Imidazopyridines, benzimidazoles and their derivatives are important heterocyclic substances with a wide range of future applications in the field of fluorescent sensors due to their excellent solid-state luminescence properties, long fluorescence lifetimes, and large Stokes shifts. Two 3-phenylimidazo[1,5-a]pyridines and two 2-phenyl-1H-benzo[d]imidazoles were synthesized and spectroscopically characterized by NMR spectroscopy and fluorescence spectroscopy analysis. The molecular structures and crystal stacking properties of three types of compounds, namely, imidazo[1,2-a]pyridine, imidazo[1,5-a]pyridine and benzimidazole, have been investigated by single-crystal X-ray diffraction analysis, and the results show that the different positions of the N atoms affect the stacking of the crystals, whereas the molecules are connected mostly through intermolecular π–π stacking and C–H⋯N and C–H⋯π interactions. Tight π-stacking contacts lead to a decrease in the fluorescence quantum yield of the molecules. Also, the shortened distance between imidazolepyridine or benzimidazole units and the strong aromatic interactions from polar substituents lead to solid-state fluorescence quenching. With the help of Hirshfeld surface analysis and electrostatic potential analysis, the roles of various noncovalent forces including hydrogen bonding, π-stacking, and C–H⋯π interactions in the formation of solid-state molecules are elucidated. The redshift of the emission spectra in solution with increasing solvent polarity and the apparent separation of the electron cloud densities between the HOMO and LUMO orbitals suggest that all seven compounds are typical intramolecular charge transfer (ICT) molecules. The HOMO–LUMO energy gap results are consistent with the fluorescence emission behavior of the compounds in solution and solid states.
研究领域:
化学
·
材料科学
·
光学材料
·
分子光谱学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）