CRYSTENGCOMM
·
2024
·
IF 2.6
Chengwei Wang,Rui Wang,Yanan Liao,Kai Liu,Qingyi Zhang,Lei Wang,Dawei Gu,Feifei Qin,Feng Chen
PbX(OH) (X=Cl, Br, I) is considered one of the effective encapsulation matrixes to improve the stability and luminescence efficiency of perovskite. Several strategies have been explored to construct perovskite@PbBr(OH) composites with high photoluminescence quantum yield. However, there is limited research on their precise growth kinetics mechanism and morphology control. Here, PbBr2 microwires (MWs) were applied to act as the lead source and serve as a skeleton frame for the growth of CH3NH3PbBr3 (MAPbBr3) MWs. The structures transition from MAPbBr3 to MAPbBr3@PbBr(OH) MWs were triggered by the synergistic effect of H2O and CH3NH3OOCCH3 (methylamine acetate, MAAc). All components and synthesis processes used in this system are explicit which allows a more in-depth exploration of the MAPbBr3@PbBr(OH) formation kinetics. The results indicate that the hydrolysis of MAAc provides OH- and partly replaces Br- ions in MAPbBr3 to form MAPbBrxAc3-x intermediate, which induces the transformation of MAPbBr3 into PbBr(OH) and until the stable MAPbBr3@PbBr(OH) microwires are formed. Based on this growth kinetics process, utilizing H2O-MAAc and extra sodium halide (NaCl, NaI) mixture can synthesize MAPbBrnX3-n@PbX(OH) (X=Cl, I) microwires successfully. Our study can open a new avenue for developing high-efficiency and high-stability fluorescent hybrid perovskites for three primary color detectors, lasing cavities, and sensors.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
·
2024
·
IF 2.6
Li Fen,Yu Xuemin,Xu Jicai,Di Mohan,Song Hongzan,Run Mingtao
In order to prepare white fluorescent emitting materials, poly(ethylene glycol succinate- co -2,5-furandicarboxylic acid ethylene glycol ester) (PESF) blue fluorescent copolyester was prepared by melt polycondensation, and an orange fluorescent copolyester was prepared by introducing 1,6,7,12-tetrachloro-3,4,9,10-perylene tetracarboxylic acid dianhydride, as one of the fluorescent units, into the molecular chain of poly(butylene glycol isophthalate- co -butylene glycol terephthalate)(PBIT). 4,4-dicyclohexylmethane diisocyanate (HMDI) was used as a chain extender for linking PESF and PBIT to obtain the white fluorescent copolyester. The results showed that introducing 2,5-furandicarboxylic acid (FDCA) into the molecular chain of aliphatic polyesters can significantly enhance the blue fluorescence intensity of the PESF copolyesters, and white-light emission with CIE coordinates of (0.31, 0.35) and (0.30, 0.34) was achieved for the copolyester by varying the content of in the PESF and the copolymerization ratio of PESF and PBIT. In addition, by adjusting the magnitude of the excitation wavelength, it is possible to achieve the fine-tuning of the light color of the white copolyester in a certain region, e.g., the CIE coordinates at 350 nm excitation are (0.32, 0.35). The white copolyester displayed high thermal decomposition temperature about 350 o C, remarkably increased elongation at break above 300%, relatively high tensile strength up to 33.2 MPa; therefore, these performance advantages make enhance their potential for applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 23
·1887
·
IF 4.4
Xiaolong Qiao,Shixing Wang,Qiulian Liu,Yuanming Zhang,Guangting Han,Haoxi Ben,Wei Jiang,Haiguang Zhao,Yan Song
China is the country with the most abundant bamboo resources in the world. Using bamboo as a raw material for pulping and papermaking can save a lot of wood and protect forests. Bamboo pulping enterprises mostly adopt sulfate processes to produce a large amount of black liquor (BL), which contains monosaccharides, polysaccharides, oligosaccharides, pectin, lignin, etc. The utilization of the high-value organic matter is of great economic and environmental significance. In this study, blue-green carbon dots (C-dots) were prepared from bamboo ( Lingnania chungii ) kraft pulp BL using a hydrothermal method. The changes in carbohydrate content in BL in relation to hydrothermal temperature and hydrothermal time were discussed in detail. Then, a series of characterizations of BL-C-dots, prepared under one of the hydrothermal conditions (180 °C, 6 h), were performed and the BL-C-dots showed an excitation-dependent photoluminescence (PL) spectrum and a quantum yield (QY) of 2.9% in an aqueous solution. Finally, the as-prepared BL-C-dots were successfully used as fluorescent materials to develop an anti-counterfeiting code. The fluorescent code exhibited a clear outline, an excitation-tunable color, good stability, and high security, showing great anti-counterfeiting potential and realizing the high-value utilization of BL.
研究领域:
林业
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材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Yiming Gou,Zejun Cao,Chunhua Ge,Rui Liu,Han Xu,Fengqi Li,Xiangdong Zhang
Research on fluorescent composites based on phase change materials is currently a hot topic. In this study, we reported the synthesis of N,N’-bis(1-octylheptadecyl)-3,4,9,10-perylenetetracarboxydiimide (PDI-C8) from perylene-3,4,9,10-tetracarboxylic dianhydride (PDI) and heptadecyl-9-amine. Two types of PDI-C8 paraffin fluorescent materials were developed: PDI-C8/paraffin composites and PDI-C8 paraffin emulsion via the Phase Inversion Composition (PIC) method. The structure, composition, and fluorescence properties of PDI-C8 were studied using NMR, MS, FT-IR, UV and FL, respectively. The photothermal conversion performance of the PDI-C8/paraffin composites was investigated. Results showed improved photothermal conversion with increased PDI-C8 contents, suggesting potential applications in solar thermal energy utilization and storage. The two fluorescent materials were characterized using DSC and FL. The photoluminescence phenomena of PDI-C8 paraffin fluorescent materials with different PDI-C8 contents all exhibit temperature-controlled characteristics. Based on the properties, a fluorescent thermometric paper was developed. Moreover, the utility of the two fluorescent materials extends to fields like anti-counterfeiting identification and encrypted writing.
研究领域:
材料科学
·
光学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic and Nano-Metal Chemistry
·
2019
·
IF 0.685
Xiuzhao Yin,Lingna Liu,Jihui Yang,Zifei Peng,Yuxiang Yang
Red nanofluorescent materials based on Y2O2S: Eu3+ were prepared by the molten salt method. Multiple small-sized Y2O2S sphere-shpaed particles ranging from 100 nm to 200 nm were prepared using different types of yttrium salts (Y(NO3)3·6H2O, YCl3, Y2(CO3)3·3H2O and Y2(C2O4)·6H2O). Based on a fluorescence performance test, their fluorescence properties reached up to 275 nm. We chose NaCl-Na2CO3 as the molten salt, and with all other experimental parameters being equal, the Y2O2S:Eu3+ particles produced were more uniform, with better diffraction properties and a smoother surface. With a molar ratio of 30 for molten salt and yttrium salt, more spherical Y2O2S:Eu3+ particles were produced small and sand homogeneous size. By using different dosage of molten salt, it was found that higher dosage of resulted in smaller particles with weaker fluorescence properties. Finally, by comparing the molten salt method with production by solid-state reaction, we found that the luminescence intensity of the product increased 20％compared to products obtained with the solid-state reaction.
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 COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Zheng Liu,Ruonan Jia,Feng Chen,Guilong Yan,Weiguo Tian,Jinming Zhang,Jun Zhang
Iron corrosion is a subject of great technological importance and extensive public concern. However, the highly efficient detection of iron corrosion at early stage is still a challenging task. Herein, bright fluorescent carbon dots (CDs) with superior response to Fe 3+ were prepared by simple solvothermal process based on citric acid and ammonia. The obtained CDs are able to rapidly, sensitively and selectively respond to Fe 3+ . The quantitative analysis showed that the CDs exhibited a linear response to Fe 3+ in the range of 10 to 300 µM, with a detection limit of 0.9 μM. And the fluorescence quenching of CDs was obvious enough to be detected by the naked eyes. Such promising responsiveness of CDs offers a great opportunity for real-time and visual detection of Fe 3+ during electrochemical corrosion process. In addition, due to the excellent stability and solubility of CDs, patterned papers and hydrogels have been fabricated utilizing cellulose and PVA as matrices. The as-prepared biocompatible, environmental-friendly and disposable CDs based fluorescent materials were successfully used for detecting the degree of iron corrosion. This could provide a simple and visual strategy for monitoring the safety of structural metal materials.
研究领域:
材料科学
·
电化学
·
分析化学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Zhi-Wei Pan,Qiao-Qiao He,Ting-Ting Du,Yu-Dan Deng,QinMei Zhong,Qiang Liu,Wen-Jing Yi
Fingerprint recognition plays a crucial role due to its uniqueness. However, conventional detection methods suffer from significant drawbacks, including high consumption, health risk and sample contamination, which restrict their practical application in the crime investigations and forensic analysis. This necessitates the development of simple, rapid, safe and environmentally-friendly alternative methods for fingerprints detection. In this work, we report the synthesis of novel cyan-emitting carbon dots (CDs) via a facile one-step hydrothermal reaction using polyethyleneimine and coumarin as precursors. The CDs enabled the clear visualization of fingerprint patterns on various substrates through immersion and spraying methods with pure water solutions, without the need for any cosolvents. Level 2 and level 3 details of fingermarks were evidently visible for individual identification within a short exposure time under 365 nm UV light irradiation. Additionally, fluorescent 3D fingerprint images revealed direct and specific evidence regarding pressing habits. Interestingly, the fluorescence intensity of CDs was tunable by adjusting the pH. We further fabricated invisible CDs ink for information encryption and decryption via UV irradiation and acid/alkali treatment. Moreover, CDs have the specific ability to sense Fe 3+ ions in actual water samples, with a detection limit of 0.613 μM and a linear range of 0–27 μM. We conducted an in-depth study on the fluorescence quenching mechanism of CDs caused by Fe 3+ ions, proposing a plausible mechanism based on a synergistic effect of dynamic quenching, static quenching and inner filter effect. Therefore, this study provides a promising multifunctional nanomaterial for fingerprint recognition, data encryption, and Fe 3+ detection.
研究领域:
化学
·
纳米材料科学
·
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2019
·Vol. 19
·期 12
·7840-7845
·
IF 1.093
Cheng Zi-Qiang,Yu Ping,Shi Hai-Quan,Liu Zhi-Min,Cheng Guang-Ling,Cheng Hong-Bo,Liang Shan
In this study, In(OH)3 nanocrystals with three morphologies including rods, cubes and spheres were synthesized through a hydrothermal method. The morphology and crystalline were manipulated by controlling the growth speed and the addition of ascorbic acid. The InVO4
nanocrystals were obtained by a process sacrificing In(OH)3 templates. The phase transformation of rods and cubes generated size-controllable products, whereas that of nanospheres formed hollow micro-spheres. InVO4 nanocrystals display a brilliant yellow emission band
with the peak at 517 nm. Intriguingly, luminescent rare-earth Eu ions with red emission could be doped into InVO4 nanocrystals during the phase transformation. Excitation and the emission spectra indicated an excitation energy transfer from the vanadate to the rare-earth ions.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Hongjun Yang,Ziye Ren,Yongkang Zuo,Yiye Song,Li Jiang,Qimin Jiang,Xiaoqiang Xue,Wenyan Huang,Kaojin Wang,Bibiao Jiang
The amide bond is one of the most pivotal functional groups in chemistry and biology. It is also the key component of proteins and widely present in synthetic materials. The majority of studies have focused on the formation of the amide group, but its postmodification has scarcely been investigated. Herein, we successfully develop the Michael additions of amide to acrylate, acrylamide, or propiolate in the presence of phosphazene base at room temperature. This amide Michael addition is much more efficient when the secondary amide instead of the primary amide is used under the same conditions. This reaction was applied to postfunctionalize poly(methyl acrylate-co-acrylamide), P(MA-co-Am), and it is shown that the amide groups of P(MA-co-Am) could be completely modified by N,N-dimethylacrylamide (DMA). Interestingly, the resulting copolymer exhibited tailorable fluorescence with emission wavelength ranging from 380 to 613 nm, which is a desired property for luminescent materials. Moreover, the emissions of the copolymer increased with increasing concentration in solution for all excitation wavelengths from 320 to 580 nm. Therefore, this work not only develops an efficient t-BuP4-catalyzed amide Michael addition but also offers a facile method for tunable multicolor photoluminescent polymers, which is expected to find a wide range of applications in many fields, such as in anticounterfeiting technology.
研究领域:
有机化学
·
高分子化学
·
材料科学
✓ 已验证
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2018
·
IF 2.975
Lei Lei,Hengchang Ma,Jiawei Lv,Tao Wang,Yuan Yang,Pei Yin,Ziqiang Lei,Yanfang Qin,Yucheng Ma,Wenhuan Yao
Materials hybrided by organic and inorganic partners via chemical bonds formation are able to display stable and multi-functional behaviors. Then, the versatile sensing platform could be established depending on their specific chemical and physical properties. In this research paper, we prepared the fluorescence materials (POSS-PDB and POSS-NTB) by a simple method. Among of them, POSS-NTB was verified as a mesoporous material with a narrowed pore diameter around 17 nm and the large Brunauer-Emmett-Teller (BET) surface area of 227 m 2 /g. Then, the solid powder of POSS-NTB was selected and evidenced as effective gas sensor toward CO 2 , N 2 and O 2 at 273 K under 1 atm pressure. Additionally, these fluorescence materials could be successfully applied as a pH sensor in the solution phase. Through combining biocompatible POSS and fluorescent molecules, POSS-NTB could enter into the cells and aggregate in the cytoplasm successfully.
研究领域:
材料科学
·
生物医学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Hongyang Wang,Yu Zhang,Shuai Lan,Lei Cao,Fei Peng,Dandan Jia,Dongjun Wang
The green fluorescent protein (GFP) shows a vivid model to design and fabricate fluorescent materials, however, a simple and generic strategy has not been really achieved to mimic the GFP system. Here we report a strategy to prepare nanoscale micelles acting like the “nano-can” in GFP, enabling a group of non-luminous amines to fluoresce. The fluorescent systems can be fabricated by mixing two kinds of commercially available non-conjugated precursors, one is amphiphilic ring-type compound for micelle, the other is amine for chromophore . Our results suggest that the nanoscale micelles provide ideal confined domains, within which amine compounds can form effective chromophores. The micelle-triggered method is generalizable to various kinds of precursors, and the emission can be tuned at different colors upon altering precursors. The presented strategy will be a starting point for a new luminescent research area in which we pay more attention on the environment than chromophore.
研究领域:
生物化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Bing Zhang,Yixin Luo,Binqiong Peng,Lisha Zhang,Ning Xie,Dan Yue,Weidong Li,Bowen Qin,Wenjing Du,Zhenling Wang,Yilei Zhang
The paper presents a green and easily prepared water-soluble fluorescent nitrogen doped carbon dots (N CDs) synthesized by one-step hydrothermal process. The N CDs displays brilliant blue fluorescence excited by UV light, with excellent water solubility, and a quantum yield of 15.7 %. The fluorescence intensity of N CDs remains unchanged after 48 h of exposure to ultraviolet light, exhibiting good photostability. Moreover, the ion sensing characteristics of these N CDs have been explored for more than a dozen anions and cations. The result reflects that this fluorescent CDs exhibits excellent sensitivity and selectivity for Fe 3+ within a range spanning of 40 ∼ 500 μΜ with a limit of detection down to 0.22 μΜ. The principle of sensor sensing is likely related to the formation of the internal filtering effect (IFE), which leads to a decline in the fluorescence intensity of N CDs in aqueous solutions containing Fe 3+ . Due to the excellent water solubility, good photostability and high yield of N CDs, the application of prepared N CDs/polyvinyl alcohol (PVA) as fluorescent materials for white LED devices was explored. The prepared N CDs/PVA (NCP) composite film can also exhibit bright blue light under 365 nm excitation, indicating good application prospects in the area of white LED devices and agricultural films.
研究领域:
材料科学
·
光学
·
环境科学
✓ 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）