Nanomaterials
·
2022
·Vol. 12
·期 19
·3444
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IF 5.719
Fei Han,Sai Ma,Dong Li,Md Mofasserul Alam,Zeheng Yang
An Sb2S3-sensitized TiO2(Sb2S3/TiO2) photo-anode (PA) exhibiting a high photo-electrochemical (PEC) performance in water oxidation has been successfully prepared by a simple chemical bath deposition (CBD) technique. Herein, the Raman spectra and XPS spectrum of Sb2S3/TiO2confirmed the formation of Sb2S3on the TiO2coatings. The Sb2S3/TiO2photo-anode significantly shifted the absorption edge from 395 nm (3.10 eV) to 650 nm (1.90 eV). Furthermore, the Sb2S3/TiO2photo-anode generated a photo-anodic current under visible light irradiation below 650 nm due to the photo-electrochemical action compared with the TiO2photo-anode at 390 nm. The incident photon-to-current conversion efficiency (IPCE = 7.7%) at 400 nm and −0.3 V vs. Ag/AgCl was 37 times higher than that (0.21%) of the TiO2photo-anodes due to the low recombination rate and acceleration of the carriers of Sb2S3/TiO2. Moreover, the photo-anodic current and photostability of the Sb2S3/TiO2photo-anodes improved via adding the Co2+ions to the electrolyte solution during photo-electrocatalysis.Keywords:Sb2S3/TiO2;photo-anode;long wavelength;photo-electrochemical;water oxidation
研究领域:
材料科学
·
能源科学
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产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2021
·
IF 4.098
Bowen Zha,Shuting Fang,Huiling Chen,Hongyu Guo,Fafu Yang
Although some sensors for Cu 2+ and Zn 2+ had been reported, the sensor with long-wavelength emission in aqueous media for in-situ detecting Cu 2+ and Zn 2+ was always expected. Herein, a biphenylacrylonitrile Schiff-base ( OPBS ) with large aromatic conjugated system was designed and synthesized in yield of 82%. OPBS possessed excellent long-wavelength fluorescence at 550–750 nm in aqueous media, which selectively response to sense Cu 2+ with quenched fluorescence and Zn 2+ with chromotropic fluorescence from red to yellow. The detection of Cu 2+ and Zn 2+ were realized without mutual interference in their coexistence system by means of the assistance of ATP. The detection limits were 2.3 × 10 −7 M for Cu 2+ and 1.8 × 10 −6 M for Zn 2+ , respectively. The sensing mechanism was elucidated by binding MS spectra, fluorescence Job’s plot and 1 H NMR spectra. Moreover, OPBS exhibited good bioimaging performance and the in-situ sensing abilities for Cu 2+ and Zn 2+ in living cells, suggesting the application potential for detecting Cu 2+ and Zn 2+ in both vitro assay and vivo environment.
研究领域:
分析化学
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生物化学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Hengjuan Deng,Xinxin Han,Juan Wang,Dongxi Liu,Bingsuo Zou
Near-infrared (NIR) light source technology has been integrated into mobile devices with the advantage of portability to provide efficient analysis in many fields. Among them, NIR light in the 850 nm band has attracted much attention due to its unique advantages. In this study, an ultra-broad NIR emission from 700 to 1100 nm with the peak at 839 nm and full width at half-maximum (FWHM) of 151 nm is achieved in a novel tetra-fluoride RbAlF4:Cr 3+ excited by 465 nm blue light, exhibiting a relatively longer emission wavelength and wider FWHM compared with the reported Cr 3+ -doped fluoride phosphors. In-depth research on its crystal structure reveals that Cr 3+ is in a weak crystal field with a distorted octahedral environment, coupled with a strong electron-phonon coupling effect, which prompts the phosphor to exhibit long-wavelength and broad NIR light characteristics. However, these reasons also lead to relatively moderate internal quantum efficiency and thermal stability. Finally, a NIR phosphor-converted light-emitting diode (NIR pc-LED) was fabricated by combining this phosphor with a commercial blue chip, which shows great potential in non-destructive testing, night-vision observation, and biomedical imaging. This work provides new insights into the design of long-wavelength broadband fluoride phosphors.
研究领域:
材料科学
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光学
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生物医学工程
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
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IF 4.4
Hui Zhou,Yang Li,Ru Fang,Jinghua Li,Chen Hong,Wen Luo
In this research, an “off–on” long-wavelength fluorescent probe (DCMN-Cl) based on (E)-2-(3-(2-(6-hydroxynaphthalen-2-yl)vinyl)-5,5-dimethylcyclohex-2-en-1-ylidene) malononitrile (DCMN) is designed and synthesized for cysteine (Cys) detection. DCMN-Cl exhibits a large Stokes shift (211 nm) and shows rapid response and high specificity to Cys. The fluorescence initensity at 635 nm reveals a good linear relationship with Cys concentration in the 0 to 50 μM range, and the detection limit is as low as 159 nM. The probe is also used for fluorescence imaging of Cys in cells and mice. Moreover, the probe provided visual evidence of Cu 2+ and curcumin-induced intracellular Cys fluctuations.
研究领域:
生物化学
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医学检测
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分子生物学
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DOI
高影响因子
Nanoscale
·
2020
·Vol. 12
·期 14
·7888-7894
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IF 6.895
Wendi Liu,Ruizheng Liang,Yanjun Lin
Fluorescent carbon dots (CDs) have drawn significant attention due to their variable species and intriguing optical properties; however, spectrally tuning the fluorescence color of CDs, especially in a long-wavelength region, is still a challenge. In this study, CDs were synthesized through the hydrothermal reaction of 2,5-diaminobenzenesulfonate (DBS) and dodecyl sulfate (DS) in the confined interlayer space of layered double hydroxides (LDHs). Particularly, the emission color of the obtained CD/LDH phosphors could be spectrally tuned from greenish-yellow (λem = 537 nm) to red (λem = 597 nm) by simply changing the molar ratio of the intercalated DBS and DS. Through the detailed characterization of different interlayer CDs by Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, elemental analysis, and X-ray photoelectron spectroscopy (XPS), a new route of modulating the absorption and emission wavelengths of CDs by regulating the content of graphitic nitrogen during heteroatom doping is presented. In addition, the stabilities of the solid-state luminescence against UV bleaching and temperature variation were improved by the rigid 2-dimensional (2D) LDH matrix, and prospective applications of the proposed CD/LDH phosphors were demonstrated in multicolour displays and in the fabrication of white light-emitting diodes (WLEDs).
研究领域:
材料科学
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光学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Zihao Yan,Zhiying Feng,Sen Zhou,Xiaoming Yang
While room temperature phosphorescence (RTP) associated with carbon dots (CDs) has been widely achieved, obtaining long-wavelength emission RTP, especially while mitigating the quenching effect of water or dissolved oxygen, remains a challenging yet desirable goal. We synthesized three types of phosphorescent CDs with varying luminescent properties by using three precursors with carboxyls positioned differently. The formation process of these CDs resulted in a well-ordered and compact structure, effectively inhibiting molecular vibrations and reducing non-radiative transitions. Consequently, it successfully prevented the quenching effect of dissolved oxygen on the RTP of CDs in an aqueous environment. Significantly, PA-AIBN synthesized with phthalic acid, rather than iso -phthalic acid and terephthalic acid, exhibited long-wavelength emission RTP, with the phosphorescent emission center reaching as far as 640 nm. To be specific, the ortho -substituted carboxyls played a critical role in boosting the formation of intramolecular hydrogen bonds. Simultaneously, an increase in the doping levels of both nitrogen (N) and phosphorus (P) in PA-AIBN facilitated the long-wavelength emission RTP. The increased sp 2 conjugated carbon core of PA-AIBN narrowed the optical band gap, contributing to the long-wavelength emission. Taken together, these factors cooperatively promoted the long-wavelength emission of RTP. Importantly, the PA-AIBN synthesized in this study exhibited a broad half-peak width and long-wavelength emission. It was successfully used in the preparation of white-light-emitting diodes without the need for commercial phosphor powder, demonstrating its enormous potential for practical lighting devices.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
CARBON
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2024
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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
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光学工程
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产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 40
·24822-24827
·
IF 3.108
Ting Yu,Guoxing Yin,Peng Yin,Ying Zeng,Haitao Li,Youyu Zhang,Shouzhuo Yao
We have synthesized a novel long-wavelength fluorescent probe MFC for detection of palladium (Pd0). This probe not only shows high selectivity for palladium, but also could quickly discriminate different palladium species (Pd0, Pd2+, Pd4+) in phosphate buffered solution. After the reaction with Pd(PPh3)4, the UV absorption of the probe MFC shifts from 334 nm to 594 nm within a few minutes. The probe MFC conjugated with alkyl carbamate, which destroys the principle of intramolecular charge transfer (ICT) and shows weak fluorescence. Based on the Pd0-catalyzed Tsuji–Trost deallylation reaction, the fluorogen was released and the fluorescence intensity at 612 nm was observed with 13-fold enhancement along with an obvious color change from yellow to purple with low detection limit.
研究领域:
分析化学
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材料科学
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催化化学
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DOI
高影响因子
INORGANIC CHEMISTRY
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2023
·
IF 4.6
Hongmei Zhang,Xiangjun Guo,Ke Jian,Liming Fu,Xihui Zhao
The synthesis of long-wavelength emission fluorescent carbon dots is not common, and it is even more difficult to quickly synthesize within 10 min. In this experiment, yellow, orange, and red B, N codoped fluorescent carbon dots were successfully synthesized using a microwave-assisted method with o-phenylenediamine as the carbon–nitrogen source, boric acid as the boron source, and potassium chloride as the catalyst in just 7 min. Based on the different contents of B, N element doping, there are differences in their surface structures, resulting in differences in the luminescence properties of the synthesized carbon dots. Long-wavelength carbon dots can avoid interference from the blue fluorescence of filter papers and have a clearer display in information encryption. Therefore, three types of carbon dots were mixed with PVP to produce fluorescent inks, and anticounterfeiting and encryption patterns were designed on the filter paper, displaying different fluorescence information under sunlight and UV light. In addition, the rich fluorescent colors were combined ingeniously to enable secondary encryption of information in the form of binary codes that increase the difficulty of decoding. These indicate that the three synthesized long-wavelength carbon dots have good application prospects in information encryption.
研究领域:
材料科学
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化学
·
信息安全
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产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2021
·Vol. 42
·期 14
·2100174
·
IF 5.734
Qing Huang,Jiaqi Cheng,Yuran Tang,Yongqiong Wu,Dan Xia,Yuchen Zheng,Mingming Guo
Nonconventional luminescence polymers without any aromatic structures have attracted great interest from researchers due to their special structure and excellent biocompatibility. However, these materials mostly emit in the blue or green region, in which preparation of materials with long-wavelength (especially near-infrared) emission is still a great challenge. In this work, it is found that 2-(dimethyl amino) ethyl methacrylate (DMA) and itaconic anhydride (ITA) undergo a ring-opening reaction at room temperature, and subsequently generate zwitterionic compound (IDMA). Based on the clustering-triggered emission (CTE) mechanism, ionic bond can effectively promote the isolated electron-rich chromophores to form new emissive clusters with extended electron delocalization. Herein, two oligomers (P1 and P2) with different fluorescence emissions by controlling the concentration of zwitterionic monomers before polymerization are synthesized. It is worth noting that the maximum emission wavelength of P2 at high concentration is up to 712 nm, which is very rare in previous reports. In addition, the resulting oligomer (P2) shows typical aggregation-enhanced emission (AEE), excitation-dependent fluorescence, temperature-sensitive emission, and solvatochromism. The cytotoxicity assay demonstrates that P2 was low toxic to Huh7 and LM3 cells, and suitable for cell imaging. This research provides the possibility for rational molecular design and the feasibility of luminescence regulation.
研究领域:
材料科学
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生物医学工程
·
高分子化学
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DOI
高影响因子
Analytical Methods
·
2018
·Vol. 10
·期 26
·3188-3196
·
IF 2.073
Li-Jun Xia,Xiao-Feng Guo,Yan Ji,Liu Chen,Hong Wang
Herein, a highly reactive long-wavelength fluorescent labeling reagent, 1,7-dimethyl-3,5-distyryl-8-phenyl-(4-oxy-acetic acid N-hydroxysuccinimidyl ester) difluoroboradiaza-s-indacene (DMDSPAB-OSu), was designed and synthesized for amino compounds. Using DMDSPAB-OSu as a pre-column derivatization reagent, an HPLC-fluorescence detection method was developed for the determination of trace amounts of aliphatic amines in samples. Prior to analysis, amines were derivatized with DMDSPAB-OSu at room temperature in 0.2 mol L−1 pH 8.8 borate buffer for only 5 min, and the baseline separation of 11 aliphatic amines was achieved within 25 min. Limits of detection between 0.8 to 1.2 nM were obtained at 630 nm with an excitation wavelength of 610 nm. Furthermore, the proposed DMDSPAB-OSu-based HPLC method was applied to the analysis of lake water and human urine with satisfying recoveries ranging from 93.0–109.7%.
研究领域:
分析化学
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生物化学
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产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2022
·Vol. 414
·期 16
·4707-4716
·
IF 4.478
Yang Zengwei,Yuan Yufei,Xu Xiangfei,Guo Hongyu,Yang Fafu
Although numerous fluorescence sensors for Cu 2+ have been presented, a long-wavelength sensor in aqueous media has rarely been reported as expected due to practical application requirements. In this work, a novel AIE molecule ( DHBB ) containing two biphenylacrylonitrile units bridged by dibenzylidenehydrazine was prepared. It possessed the merits of long-wavelength emission, good emission in aqueous media, and multiple functional groups for binding Cu 2+ . It exhibited good sensing selectivity for Cu 2+ among all kinds of tested metal ions. The detection limit was as low as 1.08 × 10 −7 M. The sensing mechanism was clarified as 1:1 stoichiometric ratio based on the binding cooperation of O and N functional groups of DHBB . The selective sensing ability for Cu 2+ remained stable at pH = 5–9 and was influenced little by other metal ions. The Cu 2+ sensing ability of DHBB was applied in real samples with 96% recovery rate. The bio-imaging experiment of living cells suggested that DHBB possessed not only good bio-imaging performance but also sensing ability for Cu 2+ in living environments. This work suggested the good application prospect of DHBB to sense Cu 2+ in real samples and living environment. Graphical abstract
研究领域:
分析化学
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生物无机化学
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分子探针
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生物医学成像
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环境监测
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细胞生物学
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传感材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）