Advanced Optical Materials
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2024
·
IF 8
Qianmin Ma,Dongfei Kong,Xuemei Min,Xinghai Yu,Pengji Yan,Yuqi Han,Qingwei Tian,Haoming Lv
The development of smart synthetic materials that are sensitive, accurate, and visually responsive to changes in temperature is vital. Herein, a supramolecular luminescent hydrogel based on a glycine/terbium (Gly/Tb) complex, rhodamine B (RB), and gelatin is reported. The hydrogel exhibits responsive luminescence and undergoes a temperature-induced phase transformation from hydrogel to sol. The electrospray ionization time-of-flight mass spectra, Fourier-transform infrared spectra, and simulation results verifiy the coordination mode of the Gly/Tb complex. The Gly/Tb complex and RB emit green and orange luminescence, respectively. When the Gly/Tb complex and RB are co-doped into the gel network of gelatin, the obtained Gly/Tb/RB hydrogel displays steady yellow luminescence by virtue of luminescence resonance energy transfer. Subsequently, a luminescent switch is constructed owing to the sensitive and reversible luminescence responsiveness of the Gly/Tb/RB hydrogel to temperature stimuli. Remarkably, the Gly/Tb/RB hydrogel undergoes a visual phase transformation from hydrogel to sol above 35 °C, allowing the ambient temperature variation to be monitored. This study establishes a novel and effective route for the construction of smart optical materials and visual temperature monitors.
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高影响因子
CRYSTENGCOMM
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2018
·Vol. 20
·期 19
·2705-2712
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IF 3.304
Liangfei Ouyang,Tengfei Zheng,Liang Shen
The application of in situ powder X-ray diffraction (XRD) to monitor the polymorphic transformation and crystallization of glycine from an ionic liquid–water system is introduced. We compared the polymorphic crystallization processes of glycine in pure water, a hydrophilic ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate ([Emim]BF4)- and a hydrophobic ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim]PF6)-water system. In these three cases, the mixture was predominantly composed of the metastable α-glycine, while the least stable β-glycine was only observed during the growth of crystals at room temperature and 32% humidity. The phase transformation from α- to β-glycine was clearly observed through the change in the intensity of characteristic peaks at 29.9° and 18.0° (2 theta) in the XRD patterns. In addition, the effect of the ionic liquid [Bmim]PF6 as an anti-solvent on the re-crystallization process of glycine from three commercially available brands was estimated. Also, the satisfactory reproducibility was obtained from glycine crystallization in the ionic liquid [Emim]BF4-water system in four independent experiments. Therefore, laboratory-based powder XRD analysis can not only provide dynamic information about phase transformation in situ, but can also discover the unstable or transition state in the polymorphic design and control crystallization processes by adding ionic liquids or other additives.
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RSC Advances
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2018
·Vol. 8
·期 37
·20719-20725
·
IF 2.936
Yan Gao,Yunhong Zhang
Increasing attention has been paid to atmospheric “brown carbon” (BrC) aerosols due to their effect on the earth's climate. Aqueous BrC aerosols were formed through aqueous reactions of hydroxyacetone (HA) with nitrogen compounds such as glycine (Gly) and/or ammonium sulfate (AS). When exposed to nitrogen compounds for several days, HA, as a type of aqueous carbonyl compound, becomes absorbent and fluorescent in the blue visible and near ultraviolet regions, which have been monitored by UV/vis and fluorescence spectroscopy. In this study, we quantified absorption and excitation-emission matrix (EEM) spectra in the formation of aqueous BrCs, which was generated from HA-Gly and HA-Gly-AS mixtures, respectively. The obtained data was used to determine the base-10 absorption coefficient (α), absorption Angstrom exponent (AAE), and effective quantum yield (QY). All of the related parameters provide further evidence for the formation of aqueous BrC. The absorbances of the as-obtained BrCs follow the order HA-Gly-AS > HA-Gly > HA-AS. In other words, HA-Gly-AS mixtures displayed the most intense absorbances, whereas HA-AS mixtures barely produced visible absorbance. It is reasonable to speculate that Gly promotes the formation of HA-Gly BrC mixtures. The experimental results are consistent with previous measurements reported by Powelson et al. BrCs from HA-Gly-AS and HA-Gly exhibit stronger fluorescence between 300 and 400 nm. Glycine plays a more important role in the formation of aqueous BrC than that of AS. Furthermore, we examined the mass absorption coefficient (MAC) by photolysis of aqueous BrCs, which resulted from the oxidation of HA-Gly and HA-Gly-AS mixtures by 5 mM H2O2. An effective photolysis time induced significant changes near-UV (300–400 nm) absorption intensity of HA-Gly and HA-Gly-AS mixtures. These results emphasize the dynamic nature of the corresponding atmospheric aqueous BrC. Overall, our study provides the optical properties of the corresponding atmospheric aqueous BrC and the H2O2 oxidation photolysis process of the as-obtained BrC in detail, which may contribute to the understanding of the important effects of aqueous BrC for atmospheric chemistry and climate.
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JOURNAL OF MOLECULAR LIQUIDS
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2023
·
IF 6
Hui Tang,Yun Li,Wancheng Bao,Pengfei Wang,Xiaomeng Wang,Qinqin Su,Yusheng Zhao,Jinlong Zhu,Songbai Han
Understanding the effects of clay minerals and amino acids on methane hydrate (MH) formation is essential for elucidating the occurrence of MH in marine sediments. In this study, kinetic experiments and molecular dynamics simulations of MH formation in montmorillonite and kaolinite systems with the presence of glycine were investigated. The experimental results showed that the addition of 5 wt% montmorillonite and 5 wt% kaolinite inhibited and promoted MH formation, respectively. Adding 1.5 wt% glycine to the montmorillonite suspension shortened the nucleation time and reduced the amount of MH; it also weakened the facilitating effect of the kaolinite suspension. The simulation results showed MH nucleation in the bulk solution due to the hydration properties of Ca 2+ on the external surface of montmorillonite. However, the addition of glycine reduced the inhibitory effect of Ca 2+ on MH formation due to the electrostatic interaction between the Ca 2+ and COO – groups. Adsorbed methane molecules on the kaolinite siloxane surface formed clathrate-like structures. In addition, glycine also abnormally incorporated into the MH structure to inhibit MH nucleation. These findings imply that the clay mineral had a significant effect on the distribution of amino acids, causing the formation of MH in clay mineral suspension to be different from pure water. Therefore, these interactions should be fully considered when studying the occurrence mechanism of natural gas hydrate when clay minerals and amino acids coexist in marine sediments.
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ENERGY & FUELS
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2024
·
IF 5.2
Shi-dong Zhou,Zhen-hao Ren,Yi-song Yu,Yang Liu,Xiao-fang Lv,Hui Du
During the operation of deep-sea pipelines, the accumulation and deposition of hydrates are important reasons for pipeline blockage. The current main measure to solve the hydrate plugging problem is the addition of low-dose inhibitors (LDHIs), but it is not yet known whether the precipitation of wax crystals will affect their effectiveness. Therefore, in this study, the hydrate cohesive force within the wax-free/wax-containing system was directly measured by using a micromechanical force device (MMF) and the reasons for the change in cohesive force were analyzed from a morphological point of view. The results showed that glycine was effective in reducing the cohesion between hydrate particles in both wax-free/wax-containing systems and still exerted the effect of antiagglomeration agent (AA) at very low concentrations (as low as 0.10 wt %). Moreover, the optimum concentration of glycine was 0.50 wt %. At this concentration, the cohesive force decreased from 8.54 to 7.07 mN/m in the wax-free system, a decrease of about 17.2%, while the cohesive force decreased from 5.94 to 2.15 mN/m in the wax-containing system, a decrease of about 63.8%. By observation of the morphology of the hydrate particles, the presence of glycine was found to reduce the volume of the liquid bridge by changing the surface roughness and wettability of the particles, thereby reducing the cohesive force. And when wax was contained in the system, the wax further reduced the wettability by adsorbing on the surface of the hydrate particles. However, under certain AA conditions, the increase in wax concentration (from 0.1 to 0.3 wt %) resulted in the free water inside the hydrate being more likely to form liquid bridges with the surrounding particles, thus weakening the effect of AA. This work analyzes the effect on cohesive force in the simultaneous presence of LDHIs and wax from a morphological point of view, which is beneficial in providing more insights into securing safe hydrate flow management.
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IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
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2026
·
IF 7
Chen Liu,Xue Zhou,Hanyu Bai,Yana Zhang,Yong Zhao,Xuegang Li
Beta-actin (ACTB), a highly conserved cytoskeletal protein, is frequently dysregulated in early-stage malignancies, making its sensitive and specific detection crucial for cancer screening. Here, we develop a reflective fiber-optic SPR biosensor functionalized with copper–glycine engineered WS₂ nanosheets for label-free ACTB detection. The Cu–glycine modification not only enables WS₂ surface amination for efficient antibody conjugation, but also introduces Cu²⁺-mediated near-infrared absorption to amplify the plasmonic resonance response. Combined with the intrinsically large surface area and high refractive index sensitivity of WS₂, this synergistic design markedly enhances both molecular binding and signal transduction. The resulting WS₂-NH₂-based sensor achieves a refractive index sensitivity of 1467.5 nm/RIU, representing a 1.67-fold enhancement over unmodified fiber probes. For ACTB detection, it delivers an ultralow detection limit down to 9.766 pM, a broadened linear range of 2.4–120 pM (5×expansion), and a biosensing sensitivity of 84.477 nm/nM (1.4× improvement). Furthermore, at 1 ng/mL, a rapid response time of 20 min is achieved, demonstrating applicability for trace-level biomarker screening. Integrating high sensitivity, broad dynamic range, amplified spectral response, and strong anti-interference capability, this plasmonic WS₂-NH₂-modified fiber platform enables highly selective, label-free ACTB quantification. These findings highlight its strong potential for early cancer diagnosis, biomarker monitoring, and precision medical applications.
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Nature Communications
·
2026
·
IF 15.7
Ya Zongyang,Li Mei,Fu Donglong,Zheng Yu,Wei Ruhan,Wang Hao,Zhang Kangning,Xu Dong,Zhang Zixuan,Zhang Xue,Yan Shen,Wang Hua,Zhang Shengbo,Gong Jinlong
Photocatalytic C−N coupling offers a promising approach for the sustainable production of amino acids, but the uncontrolled coupling pathway of reaction intermediates limits yield and selectivity. This paper describes a Pd−B diatomic catalyst that can selectively catalyze the photosynthesis of glycine via C−N coupling reaction between waste poly(ethylene terephthalate)-derived ethylene glycol and nitrate, achieving a glycine yield of 2.9 mmol g cat −1 h −1 with a selectivity of 92%. Mechanistic investigations reveal that ethylene glycol is photo-oxidized to glycolaldehyde at the hole-rich B site, while nitrate is photo-reduced to NH 4 + /NH 3 at the electron-rich Pd site. Subsequently, glycolaldehyde undergoes C−N coupling with NH 4 + /NH 3 , and further photo-oxidized to form glycine. The Pd−B diatomic site more effectively stabilizes the glycolaldehyde intermediate, resulting in a more favorable C−N coupling pathway than metal oxide and enhancing glycine selectivity. Thus, we show a catalytic system for selective glycine photosynthesis by precisely regulating the reaction pathways of key intermediates.
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PubMed
高影响因子
ENERGY CONVERSION AND MANAGEMENT
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2021
·
IF 9.709
Yongqing Xu,Tai Zhang,Bowen Lu,Cong Luo,Fan Wu,Xiaoshan Li,Liqi Zhang
Calcium looping process (CaLP) is one of the most perspective thermochemical energy storage (TCES) strategies to meet the demands of developing the 3rd generation concentrated solar power plants (CSP) in the CO 2 Brayton cycle. However, the CaO-based heat carriers inevitably experienced severe sintering over the cycles, and their energy storage capacities deteriorated drastically. Research on the energy storage capacity of the CaO-based heat carriers in a closed-loop calcium looping process for thermochemical energy storage (CaLP-TCES; i.e., calcining the CaO-based materials under CO 2 -rich stream, which is much practical in the industry) is rare. Hence, this work employed a novel recipe to synthesize a variety of organic acid–modified CaO-based heat carriers to explore their thermochemical energy storage performance in a new closed-loop CaLP-TCES system. The energy storage capacity of the materials was evaluated by a simultaneous thermal analyzer (TGA/DSC), and the mechanism behind their promising energy storage performance was explored by X-ray diffraction, field emission scanning electron microscopy, N 2 physisorption, reaction kinetics method and so on. Results showed that glycine modified eggshell (“Glycine eggshell”) was an effective heat carrier for the CaLP-TCES system. After 60 repeated cycles at “650 °C – 900 °C,” “Glycine eggshell” accumulated an energy storage capacity of 110.124 kJ/g, which was approximately six times higher than that of “Raw eggshell”. Comprehensively considered the effect of carbonation temperature and calcination temperature on the energy storage/releasing performance of the “Glycine eggshell” materials, “750 °C – 900 °C” was the best option for the closed-loop CaLP-TCES system for the concentrated solar power plants. After glycine modification, the rich mesoporous and macroporous structure in the CaO-based material was generated, thereby improved cyclic thermochemical energy storage performance.
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Journal of Functional Foods
·
2019
·
IF 3.197
Yanbei Tu,Kai Wang,Jian-Bo Wan,Chengwei He
Glycine tabacina (Labill.) Benth, a renowned Chinese medicinal herb, has been used for treatment of rheumatoid arthritis (RA) and joint infection. This study aimed to investigate inhibitory effect of its ethanol extract (GTE) on RA-associated inflammation. Nine isoflavonoids of twelve ones which were found in G. tabacina roots were identified by UHPLC-DAD-MS/MS. GTE treatment suppressed lipopolysaccharide-stimulated overproduction of nitric oxide, TNF-α and IL-6, and iNOS expression in macrophages. GTE blocked the activation of NF-κB and MAPK pathways, as indicated by reduced levels of phosphorylation of IKKα/β, IκBα, p38, ERK and JNK, and the suppressed nuclear translocation of NF-κB p65. Additionally, GTE administration decreased swelling of arthritic paw and serum TNF-α and IL-1β levels in collagen-induced arthritis (CIA) mice. These results demonstrated that GTE exhibited strong anti-inflammatory and anti-arthritic activities through suppressing NF-κB and MAPK pathways activation in activated macrophages and CIA mice, suggesting the potential applications of this species in RA prevention and treatment as functional food or therapeutic agent.
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ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Yufang Wu,Yiwei Sun,Jing Xiao,Xun Wang,Zhong Li
In this work, a novel Gly@HKUST-1 with simultaneously enhanced moisture stability and improved adsorption capacity was developed by grafting glycine (Gly) onto the open metal sites of HKUST-1, in order to recover light hydrocarbons from natural gas efficiently. The resultant Gly@HKUST-1 had higher C2H6 and C3H8 adsorption capacities compared to HKUST-1 and some other metal–organic frameworks, which reached as high as 6.47 and 7.80 mmol/g at ambient conditions. Its C2H6/CH4 and C3H8/CH4 adsorption selectivities were up to 12.6 and 173.5, respectively. Fixed-bed experiments showed that 0.3Gly@HKUST-1 could separate the CH4/C2H6/C3H8 mixtures completely at ambient conditions, showing excellent separation property toward the light hydrocarbons. More importantly, stability experiments confirmed that after the two samples were exposed to moist air (RH of 55%) for 20 days, 0.3Gly@HKUST-1 still remained its crystal structure, while parent HKUST-1 lost most of its crystallinity. Computational simulations showed that Gly grafting onto unsaturated Cu site played a critical role in enhancing stability against water vapor and improving capacity due to its shielding of unsaturated Cu site as well as introduction of −COOH or −NH2 as the H-binding sites. Gly@HKUST-1 is promising for practical application of efficiently recovering ethane and propane from natural gas by adsorption.
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INORGANIC CHEMISTRY
·
2015
·
IF 4.762
Li An,Panpan Zhou,Jie Yin,He Liu,Fengjuan Chen,Hongyan Liu,Yaping Du,Pinxian Xi
The synthesis of semiconducting nanoplates (NPs) with defined crystal phase is of particular interest, especially their intriguing properties related to the size, shape, and crystal phase. Herein, a liquid-state transformation process from hexagonal-phase CuS NPs is employed to fabricate the cubic-phase Cu2S NPs. The CuS NPs were converted into Cu2S NPs but maintained the morphology. The Cu2S NPs exhibit better oxygen evolution reaction (OER) activity than CuS NPs. Furthermore, the OER activity of Cu2S NPs can be improved by the addition of a glycine (Gly) solution. The Cu2S NPs with Gly in a phosphate buffer solution exhibit excellent OER activity and durability, which approaches that of the best known commercial Ir/C (20%) nanocatalyst. In this work, a good strategy for fabricating a noble-metal-free OER catalyst has been proposed, which could provide insight into developing new water oxidation catalysts with high activity.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Guang Yang,Peng He,Xin-Ping Qu
The inhibitory effect of glycine on corrosion and chemical mechanical polishing (CMP) of Mo in hydrogen peroxide (H 2 O 2 ) based abrasive-free alkaline slurry has been investigated. Results show that, in H 2 O 2 based slurry, both static etching rate (SER) and removal rate (RR) of Mo during chemical mechanical polishing were reduced by adding glycine and the inhibition efficiency was around 50%. From ex-situ and in-situ open circuit potential (OCP), current density transient and potentiodynamic polarization measurements, it is found that formation of oxides was delayed due to blocked contact between oxidizer and the sample surface by electrostatic adsorption of glycine zwitterion on the surface. Glycine can form complex with MoO 3 and promote dissolution of surface oxide, MoO 3 , resulting in a reduced passivation layer. The slowed oxidation reaction dominates the whole process, resulting inhibited Mo corrosion and leading to a smoother Mo surface.
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