JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Feng Gu,Zhaomin Cao,Yingzheng Liu,Di Peng
Polymer–ceramic pressure-sensitive paints (PC-PSPs) enable time-resolved pressure-field measurements with high spatial resolution. Their porous binder, formed by a large proportion of ceramic particles and a small amount of polymer, facilitates oxygen diffusion, ensuring a rapid response. However, the low polymer concentration in PC-PSPs leads to severe dynamic self-quenching of luminescence, which is further complicated by the microenvironment heterogeneity induced by the high concentration of ceramic particles. While these factors significantly deteriorate the static sensing performance of PC-PSPs, the underlying mechanisms remain poorly understood. To address this gap, this paper introduces a photophysical model for the quenching mechanism in PC-PSPs, considering the dynamic self-quenching effect and microenvironment heterogeneity. The proposed model is verified based on experimental results of PC-PSPs with varying polymer-to-ceramic particle ratios. The effects of dynamic self-quenching and microenvironment heterogeneity on pressure sensitivity, response time, and photodegradation are analyzed based on theoretical analysis and experimental results. The findings can provide valuable reference for the design and optimization of PC-PSPs.
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 ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Xuemei Yao,Yatuan Ma,Xiya Miao,Shulei Li,Yufeng Du,Yun Cheng,Yue Yang,Xianchao Du,Huajuan Deng,Huiling Geng,Ruijin Yu
The propensity of carbon dots (CDs) to undergo significant self-quenching in the solid state, whether due to excessive resonance energy transfer or direct molecule collision, has significantly limited their application in light-emitting diodes (LEDs). However, incorporating electron-deficient boron atoms, guanidine functional groups, and boron hydroxyl groups proves advantageous in forming a hydrogen bond structure network. This network effectively suppresses the self-quenching phenomenon observed in solid CDs, thereby enhancing their potential for use in LEDs. Therefore, on this basis, a series of multicolor tunable solid-state fluorescent CDs were obtained, and their formation mechanism was discussed. The structure and morphology of the prepared series of multicolor tunable CDs were also characterized. The photoluminescence quantum yield (PLQY) of B-CD, Y-CD, and R-CD is 34.3 %, 23.7 %, and 20.5 %, respectively. The prepared series of CDs were used to successfully package the red, blue, and yellow monochromatic LEDs. By adjusting the ratio of CDs of different colors, a single matrix white-LEDs (w-LEDs), two primary colors w-LEDs, and the full-carbon-based w-LED of three primary colors are also obtained. The correlated color temperature of the above three w-LEDs is 7277, 3957, and 5040 K, the Color Rendering Index is 88, 91, and 92, and color coordinates are (0.302, 0.319), (0.376, 0.355), and (0.344, 0.354), respectively. It is demonstrated that CDs are a promising material in the solid-state lighting field.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2019
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IF 1.901
Simin Cao,Zhongneng Zhou,Haoyang Li,Menghui Jia,Yangyi Liu,Mengyu Wang,Mengjie Zhang,Sanjun Zhang,Jinquan Chen,Jianhua Xu,Jay R. Knutson
The metabolic cofactor and energy carrier NADH (nicotinamide adenine dinucleotide, reduced) has fluorescence yield and lifetime that depends strongly on conformation, a fact that has enabled metabolic monitoring of cells via FLIM (Fluorescence Lifetime Microscopy). Using femtosecond fluorescence upconversion, we show that this molecule in solution participates in ultrafast self-quenching along with both bulk solvent relaxation and spectral relaxation on 1.4 and 26 ps timescales. This, in effect, means up to a third of NADH is effectively “dark” for FLIM in the 400–500 nm observation window commonly employed. Methods to compensate for, avoid or measure dark species corrections are outlined.
研究领域:
生物物理学
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细胞生物学
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代谢组学
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DOI
PubMed
高影响因子
Nano Research
·
2018
·Vol. 11
·期 5
·2488-2497
·
IF 7.994
Dai Cong,Yang Chengxiong,Yan Xiuping
Activatable fluorescence nanoprobes with only one kind of nanomaterial that can act as both the energy donor and acceptor simultaneously are scarce, but highly desirable for biosensing and bioimaging. In the present study, we reveal the preparation of self-quenched gold nanoclusters as a simple fluorescent turn-on probe for imaging intracellular glutathione. The self-quenched gold nanoclusters are prepared via disulfide bond-induced aggregation of gold nanoclusters. Compared with monodisperse gold nanoclusters, the developed self-quenched gold nanoclusters exhibit weak emission at 735 nm with a 40-nm red shift and much lower quantum yield (0.69%). The prepared self-quenched gold nanoclusters also possess good sensitivity and selectivity for glutathione detection, and are applicable for fluorescent turn-on imaging of intracellular glutathione.
研究领域:
生物传感
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生物成像
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纳米材料科学
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DOI
高影响因子
ADVANCES IN POLYMER TECHNOLOGY
·
2015
·Vol. 36
·期 2
·137-144
·
IF 1.045
Saiqi Tian,Peikun Zhang,Haojun Fan,Yi Chen,Jun Yan,Bi Shi
A fluorescent fluorescent waterborne polyurethane (FWPU) was synthesized by conjugating fluorescer, isodium 4,4 ′ -bis[4-anilino-6-hydroxyethylamino-6-(2-choloronilino-1,3,5-triazin-2-yl)amino]stilbene-2,2 ′ -disulphonate (RSW), into polyurethane backbone as a chain extender. The expected structure of FWPU was confirmed by Fourier transform infrared, 1 H nuclear magnetic resonance, and UV−vis spectrophotometer, and the effect of fluorescer content, temperature, as well as quencher on the fluorescence performances of FWPU was investigated in detail. Results reveal that covalently conjugation has unconspicuous effect on optical performance, and FWPU shows similar fluorescence intensity to fluorescer RSW except for a red shift of about 10 nm in maximum absorption wavelengths. Further study finds that there is a positive correlation between the concentration of fluorescer and the fluorescence intensity of FWPU; however, the opposite effect is obtained when the concentration exceeds 1 × 10 −5 mol/L, which is attributed to the concentration self-quenching. Although high temperature will decrease the intensity of fluorescence, the fluorescence components in FWPU shows high resistance to fluorescence quencher and thermal decomposition as a consequence of chemical combination with the polymer chain.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Chuqiao Wu,Shuting Zhang,Yuhui Zheng,Aiqi Wang,Qiming Zhao,Wenjie Sun,Wanqiang Liu,Chenggang Long,Qianming Wang
Treatment of sulfur dots with polyethylene glycol (PEG) has been an efficient way to achieve a high luminescence quantum yield, and such a PEG-related quantum dot (QD)-synthesis strategy has been well documented. However, the polymeric insulating capping layer acting as the “thick shell” will significantly slow down the electron-transfer efficiency and severely hamper its practical application in an optoelectric field. Especially, the employment of synthetic polymers with long alkyl chains or large molecular weights may lead to structural complexity or even unexpected changes of physical characteristics for QDs. Therefore, in sulfur dot preparation, it is a breakthrough to use short-chain molecular species to replace PEG for better control and reproducibility. In this article, a solvent-type passivation (STP) strategy has been reported, and no PEG or any other capping agent is required. The main role of the solvent, ethanol, is to directly react with NaOH, and the generated sodium ethoxide passivates the surface defects. The afforded STP-enhanced emission sulfur dots (STPEE-SDs) possess not only the self-quenching-resistant feature in the solid state but also the extension of fluorescence band toward the wavelength as long as 645 nm. The realization of sulfur dot emission in the deep-red region with a decent yield (8.7%) has never been reported. Moreover, a super large Stokes shift (300 nm, λex = 345 nm, λem = 645 nm) and a much longer decay lifetime (109 μs) have been found, and such values can facilitate to suppress the negative influence from background signals. Density functional theory demonstrates that the surface passivation via sodium ethoxide is dynamically favorable, and the spectroscopic insights into emission behavior could be derived from the passivation effect of the sulfur vacancy as well as the charge-transfer process dominated by the highly electronegative ethoxide layer.
研究领域:
材料科学
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光学
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理论化学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Yueyan Zang,Jinxia Xu,Zhentong Lu,Chunhui Yi,Fanyong Yan
Fluorescence-tunable sulfur quantum dots (SQDs) were obtained by an assembly-fission process and assisted etching with H 2 O 2 . The morphological and structural characterization indicated that the obtained SQDs possess excellent dispersion, high water solubility and abundant surface functional groups, which is beneficial to its further application. In the Gaussian software, the electron cloud density distribution around the entire molecular structure is simulated and the density generalization calculations confirms that the main reason for the red shift of emission is the synergistic effect of SQDs size and surface states. Moreover, blue fluorescent SQDs (B-SQDs) showed high sensitivity and specific selectivity toward berberine hydrochloride with detection limits as low as 0.24 nM, and have been successfully used for water sample and actual drug detection. It is noteworthy that the solid-state luminescence properties of SQDs are mainly attributed to the adsorption of chain PEG on the surface of SQDs. By mixing SQDs with epoxy resin , dual-color fluorescent films were prepared and used as the fluorescence conversion layer to manufacture high-performance light-emitting diodes. The CIE (Commission Internationale d′Eclairage) coordinates of WLED is (0.27,0.29), CCT (Correlated color temperature) is 5793 K and CRI (Color rendering index) is 85.2. Moreover, the prepared SQDs are highly fluorescent and enable latent fingerprint imaging for identity recognition. This work has advanced the development of SQDs for analytical sensing, optical devices , and fingerprint imaging.
研究领域:
材料科学
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分析化学
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光学工程
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生物医学
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产品关联
DOI
高影响因子
TALANTA
·
2017
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IF 4.162
Linge Nian,Yue Hu,Caihong Fu,Chen Song,Jie Wang,Jianxi Xiao
The development of novel assays to detect collagen fragments is of utmost importance for diagnostic, prognostic and therapeutic decisions in various collagen-related diseases, and one essential question is to discover probe peptides that can specifically recognize target collagen sequences. Herein we have developed the fluorescence self-quenching assay as a convenient tool to screen the capability of a series of fluorescent probe peptides of variable lengths to bind with target collagen peptides. We have revealed that the targeting ability of probe peptides is length-dependent, and have discovered a relatively short probe peptide FAM-G(POG) 8 capable to identify the target peptide. We have further demonstrated that fluorescence self-quenching assay together with this short probe peptide can be applied to specifically detect the desired collagen fragment in complex biological media. Fluorescence self-quenching assay provides a powerful new tool to discover effective peptides for the recognition of collagen biomarkers, and it may have great potential to identify probe peptides for various protein biomarkers involved in pathological conditions.
研究领域:
生物化学
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分子生物学
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诊断学
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产品关联
DOI
PubMed
高影响因子
ADVANCES IN POLYMER TECHNOLOGY
·
2016
·Vol. 37
·期 2
·498-503
·
IF 1.114
Huaiwei Wang,Xingyuan Zhang,Junpei Li
A purple fluorescent monomer, 2-[3-(9-ethylcarbazole)ureido]ethyl methacrylate (CUMA), was synthesized from 3-amino-9-ethylcarbazole and 2-isocyanatoethyl methacrylate. A series of fluorescent waterborne polyurethane-acrylate emulsions (PCUMA-PUA) were obtained by the step-growth addition polymerization method. In this method, a polyurethane prepolymer was terminated with C=C first, then reacted with CUMA by free radical polymerization. It was demonstrated that the hydrophobic component in the amphiphilic PCUMA-PUA is preferentially located on both ends of the copolymer. The molecular structures of the monomer and the copolymer were confirmed with Fourier transform infrared (FTIR) and UV–Vis absorption spectra. It was observed that the fluorescence intensity of the PCUMA-PUA copolymer is higher than CUMA at the same concentration of fluorophores in aqueous solutions. It was also observed that when the mass fraction of CUMA was higher than 2 wt%, self-quenching behavior became evident. The new composite films were ascertained to have an increased thermal stability with increasing CUMA content.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiaoyang Li,Jiahang Liu,Ruolin Lv,Yingying Chu,Lu Lv,Junhe Lu,Weiming Zhang
Self-quenching of radicals and their non-selective attack on co-existing substrates result in the low oxidant utilization efficiency in Fenton and Fenton-like systems. Herein, we developed a novel octahedral carbon-encapsulated zirconium oxide catalyst (ZrO 2 -C) featured by large specific surface area (219.5 m 2 /g), highly-dispersed sub-5 nm active sites, and strong metal-support interactions. The catalyst shows outstanding performance for peroxymonosulfate (PMS) activation, and a two-step catalytic mechanism is proposed. First, it interacts with PMS via inner-sphere coordination to form a metastable surface complex (Stage I); then, the reactive complex reacts with selected molecules via oxygen-atom-transfer route (Stage II). Surprisingly, only 1.21 PMS molecules was consumed for each molecule of carbamazepine (CBZ), almost close to the stoichiometric ratio. Based on a quantitative structure–activity relationship between the reaction rates and the molecular structures of fourteen substituted phenols, we demonstrated that this catalytic process was highly selective towards electron-rich compounds, that is, only those organics with E HOMO values higher than ca. −6.52 eV could be oxidized. Overall, this study provides mechanistic insights into the catalytic selectivity of Zr-based catalysts and advances their further application in Fenton-like systems.
研究领域:
环境科学
·
催化化学
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Qingyou Cai,Fanfan Wang,Jingying Ge,Zhiguo Xu,Mei Li,Hui Xu,Hua Wang
Herein, we reported the G-wire-based self-quenched fluorescence probe and its application in ultrasensitive microRNA (miRNA) detection by combining with target-activated isothermal cascade amplification. The terminal-single-fluorescein (FAM)-labeled G-rich oligonucletides self-assembled into G-wire nanostructures (G-wires) with K + and Mg 2+ . Thereafter, the G-wires brought terminal-labeled FAM into close proximity, as a result, the self-quenched signal probe formed. Besides, when there was the target miRNA, target-activated isothermal cascade amplification converted miRNA into the copious trigger DNA. After hybridization between trigger DNA and the self-quenched probe, the G-wires were splited and forced the apart of proximate FAM, and then the self-quenched probe displayed an “on” mechanism. Therefore, the approach gave a limit of detection (LOM) of 0.82 aM to miRNA-21 and could be implemented within a wide linear range of 2 aM to 2 nM. This approach was able to distinguish the single-mismatched miRNA-21, which was selective and sensitive in detecting human spiked serum samples.
研究领域:
分子生物学
·
生物化学
·
纳米技术
·
癌症诊断
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DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2019
·Vol. 7
·期 48
·7676-7682
·
IF 5.047
Xiuxia Sun,Linyan Yao,Caihong Fu,Liting Luo,Jie Wang,Jianxi Xiao
Collagen with a single amino acid substitution is the main cause of a plethora of heritable disorders such as Osteogenesis Imperfecta and Ehlers-Danlos syndrome. Though significant advances have been achieved in the development of protein assays, it remains very challenging to distinguish a protein with a single amino acid mutation from the wild-type protein. A novel fluorescent self-quenching assay has been constructed to detect target collagen peptides with a single amino acid mutation using two probe peptides. The hybridization of the probe peptide and the natural target collagen peptide results in a complete heterotrimer and strong fluorescence, whereas the mixture of the probe peptide and the mutation collagen sequences leads to a partial homotrimer and pronounced fluorescence self-quenching. The extent of fluorescence quenching is dependent on the identity of the residue replacing Gly following the order of Ala < Ser < Arg, while the Gly–Ala mutation causes the mildest fluorescence loss. The probe peptide-based fluorescence self-quenching assay facilitates specific detection of the target collagen sequence with a single Gly mutation at the nM level. The simultaneous utilization of both probe peptides enables efficient discrimination between different mutation peptides. To our knowledge, our work may be the first report of a robust analytical assay that can identify collagen fragments with single amino acid mutation, which will greatly contribute to deciphering the molecular mechanism of Osteogenesis Imperfecta as well as developing novel diagnostic strategies.
研究领域:
生物化学
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分子生物学
·
分析化学
·
医学诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）