Materials Science & Engineering C-Materials for Biological Applications
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2015
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IF 3.088
Manqing Yan,Hongjun Yang,Guangzhao Zhang
A novel biocompatible and biodegradable copolymer was synthesized by one-step hybrid copolymerization of ε -caprolactone (CL) and 2-( N , N -dimethylamino) ethyl methacrylate (DMAEMA) employing (1-tert-butyl-4,4,4-tris(dimethylamino)-2,2-bis[tris(dimethylamino)phophoranylidenamino]-2Λ5,Λ5-catenadi(phosphazene) ( t -BuP 4 ) as a catalyst. The as-synthesized copolymer was betainizated resulting in a zwitterionic copolymer poly (CL- co - z DMAEMA) and the structure of the zwitterionic copolymer was confirmed by the FT-IR, NMR, and XPS measurements. The results of dynamic light scattering (DLS) show that this zwitterionic copolymer can self-assemble into stable micelles. The results of quartz crystal microbalance with dissipation (QCM- D ) analysis and MTT measurement suggest that this zwitterionic copolymer possess better protein resistance and lower cell cytotoxicity in vitro in comparison with the cationic copolymer. The pyrene solubilization measurement of copolymers poly (CL- co - z DMAEMA) indicates an excellent pyrene solubilization capacity. These zwitterionic polymer micelles can release drugs in response to specific signals, such as temperature, pH, and enzymes and have a potential application in drug delivery and gene therapy due to their good antifouling, low cytotoxicity and high pyrene solubilization.
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PubMed
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Wenzhi Wang,Liwei Wang,Shuo Song,Xinxin Guo,Hongyu Liu,Guangqiang Liu
All inorganic perovskite quantum dots (PQDs) have been studied extensively because of their excellent photoelectric properties. However, its poor stability and lead toxicity limit its practical application. At the same time, the complex synthesis conditions of the hot injection method also limited the preparation of large quantities. Here, we have successfully synthesized Mn-doped CsPb(Cl/Br) 3 PQDs with excellent thermal stability at room temperature by a simple supersaturation crystallization method. The synthesized Mn-doped CsPb(Cl/Br) 3 PQDs has good homogeneity and crystallinity. Meanwhile, Mn-doped CsPb(Cl/Br) 3 PQDs maintains the same crystal structure as CsPb(Cl/Br) 3 PQDs. Importantly, it was found that the activation energy of CsPb(Cl/Br) 3 PQDs after manganese doping increased from 65.1 meV to 222.8 meV through the high and low temperature PL test of 80 K–500 K. The crystal structure of CsPb(Cl/Br) 3 PQDs is more stable due to the introduction of manganese ion, and the thermal stability is significantly improved. In this study, manganese doped CsPb(Cl/Br) 3 PQDs with good crystallinity and thermal stability was rapidly synthesized by a simple supersaturation crystallization method at room temperature, which opened up a new way to improve the stability of PQDs and explore other non-toxic metal elements to replace Pb 2+ .
研究领域:
材料科学
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纳米技术
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化学
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物理学
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DOI
高影响因子
Defence Technology
·
2025
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IF 5.9
Ping Ye,Weimiao Wang,Xiaodong Li,Zhiqiang Qiao,Changping Guo,Jinjin He,Xu Zhou,Rui Li,Guangcheng Yang,Guoqing Lv
Based on the characteristics of laser-induced surface ignition, energetic photosensitive films show promising potential to meet the ignition requirements of various energetic materials (EMs). In this study, DATNBI/ferric alginate (DI/FeA), DI/cobalt alginate (DI/CoA), and DI/nickel alginate (DI/NiA) films are fabricated by employing sodium alginate (SA) with a three-dimensional network structure as the film matrix, via ionic cross-linking of SA with Fe 3+ , Co 2+ , and Ni 2+ ions. The study demonstrates that the ionic cross-linking enhances the hydrophobic performance of the films, with the water contact angle increasing from 82.1° to 123.5°. Concurrently, the films’ near-infrared (NIR) light absorption improved. Furthermore, transition metal ions facilitate accelerated electron transfer, thereby catalyzing the thermal decomposition of DATNBI. Under 1064 nm laser irradiation, the DI/FeA film exhibits exceptional combustion performance, with an ignition delay time as low as 76 ms. It successfully acts as an NIR laser ignition medium to initiate the self-sustained combustion of CL-20. This study demonstrates the synergistic realization of enhanced hydrophobicity, improved photosensitivity, and promoted catalytic decomposition through microstructural design of the material, providing new insights for the design of additive-free EMs in laser ignition applications.
研究领域:
材料科学
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化学工程
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光学
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物理化学
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激光技术
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2025
·
IF 2.1
Jianhui Du,Yunlu Li,Guoliang Jin,Jianlong Wang,Lizhen Chen
2,4,6,8,10,12-Hexacyclopropyl-2,4,6,8,10,12-hexaazaisowurtzitane (HCPIW) is a novel nitration precursor used in the synthesis of CL-20 (2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane). Investigating the solubility of HCPIW is of significant importance for optimizing its synthesis and crystallization processes, as well as for advancing the development of the CL-20 synthetic route. However, to the best of our knowledge, no studies have been reported on the solubility of HCPIW. To support downstream processing, its solubility in 12 pure solvents (dichloromethane, chloroform, carbon tetrachloride, 1,1,2-trichloroethane, 1,2-dichloroethane, n-hexane, cyclohexane, ethyl acetate, acetone, methanol, ethanol, and acetonitrile) was determined by the gravimetric method over the temperature range of 278.15 to 318.15 K. The experimental solubility data were correlated using the Apelblat equation, Yaws model, van’t Hoff equation, and a polynomial empirical model. All four models exhibited excellent agreement with the experimental data, with correlation coefficients (R2) exceeding 0.99 and root-mean-square deviations (RMSD) approaching zero. These models are thus suitable for accurately describing the solubility behavior of HCPIW. This study provides essential thermodynamic data to support further research and process development involving HCPIW.
研究领域:
化学工程
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热力学
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材料科学
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有机合成
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工艺优化
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DOI
高影响因子
Heliyon
·
2023
·Vol. 10
·期 1
·e23371
·
IF 4
Mingming Zheng,Yinghao Li,Menghua Cao,Yuxin Guo,Guohong Qiu,Shuxin Tu,Shuanglian Xiong,Dun Fang
In the present study, we demonstrated that the presence of cysteine could remarkably enhance the degradation of atrazine by Fe 3 O 4 /persulfate system. The results of electron paramagnetic resonance (EPR) spectra confirmed the combination of cysteine and Fe 3 O 4 exhibited much higher activity on activation of persulfate to generate more SO 4 •- and •OH than Fe 3 O 4 alone. At pH of 3.0, SO 4 •- and •OH contributed to about 58.2 % and 41.8 % of atrazine removal respectively, while •OH gradually dominated the oxidation of atrazine from neutral condition to alkaline condition. The co-existing Cl - and HCO 3 - could quench SO 4 •- , resulting in the inhibition of atrazine degradation. The presence of low natural organic matters (NOM) concentration (0-2 mg L -1 ) could enhance the atrazine removal, and high concentration (>5 mg L -1 ) of NOM restrained the atrazine degradation. During the Cysteine/Fe 3 O 4 /Persulfate process, cysteine served as a complexing reagent and reductant. Through acidolysis and complexation, Fe 3 O 4 could release dissolved and surface bound Fe 2+ , both of which contributed to the activation of persulfate together. Meanwhile, cysteine was not rapidly consumed due to a regeneration process, which was beneficial for maintaining Fe 2+ /Fe 3+ cycle and constantly accelerating the activation of persulfate for atrazine degradation. The reused Fe 3 O 4 and cysteine in the Cysteine/Fe 3 O 4 /Persulfate process exhibited high stability for the atrazine degradation after three cycles. The degradation pathway of atrazine included alkylic-oxidation, dealkylation, dechlorination-hydroxylation processes. The present study indicates the novel Cysteine/Fe 3 O 4 /Persulfate process might be a high potential for treatment of organic polluted water.
研究领域:
环境科学
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化学工程
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水处理
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污染物降解
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DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
·
IF 4.1
Duanyang Wu,Shengnan Zhang,Jing Xu,Wei Cheng
Carbamazepine (CBZ) is a ubiquitous persistent micropollutant in water. This study evaluated the degradation of CBZ by UV/Chlorine process. The influencing factors, such as chlorine dosage, solution pH, and water matrix constituents (Cl − , HCO 3 – and NOM) on CBZ removal were systematically investigated. The reactive HO•, Cl• and ClO• species were mainly responsible for the degradation of CBZ, and their contributions determined by probes (Benzoic acid, Nitrobenzene and 1,4-Dimethoxybenzene) varied with pH. Theoretical quantum calculations involving a total of 79 transition states suggested that HO• attack CBZ by hydrogen atom transfer (HAT) and radical adduct formation (RAF) mechanisms, while Cl• and ClO• proceed mainly through HAT and RAF mechanism, respectively. The reaction rates between CBZ and free radicals were calculated by evaluating the energy barriers and transition states. Furthermore, the proposed formation pathways and reaction mechanisms of main hydroxylated products and chlorine substituted products were unequivocally authenticated by transition states calculations. Overall, this study combined experimental and computational approaches to provide an in-depth degradation mechanism of CBZ in UV/Chlorine process.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2024
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IF 4
Chenyang Liu,Shuxiang Jiao,Yuhua Liu,Tao Wu,Leilei Xie,Lijuan Zhang,Yun Zhang,Wenming Wang,Hongfei Wang
Three isomeric nitrosylruthenium complexes [RuCl(Qn)(Pro)(NO)] ( 1 – 3) were prepared, where Qn is 8-hydroxyquinoline and Pro is D-proline. The complexes 1 – 3 were characterized by 1 H-NMR, 13 C-NMR, ESI-MS, and their crystal structure were further determined with X-ray diffraction techniques. In complexes 1 and 3 , the O atom of D-proline coordinated trans to NO, while the O atom of 8-quinolinol coordinated trans to NO in complexes 2 , and the complexes 1 and 3 are the Ru-centered enantiomers. The photo induced NO release of the complexes were explored using time-resolved infrared spectroscopy (FT-IR) and electron paramagnetic resonance spectroscopy (EPR) in solution and the released NO was successfully imaged in living cells using a NO selective fluorescent probe. Furthermore, the cytotoxicity of the isomeric complexes against HeLa, HepG2 and A549 cells were evaluated. Among them, the selectivity for HeLa cells is significant (SI ≥ 5) with IC 50 values in the range of 1.15–1.94 μM. Moreover, the three complexes spontaneously bind to human serum albumin (HSA) through hydrogen bonding and van der Waals forces, the binding constants K b of 1 – 3 are 1.528 × 10 4 , 2.390 × 10 4 and 2.694 × 10 4 M −1 at 298 K, respectively. Molecular docking analyses reveals that 1 – 3 bind within subdomain IB of the protein, which suggest that HSA could be a delivery vehicel for these complexes. This study provides insight into the potential biological and pharmaceutical applications for these isomeric nitrosylruthenium complexes.
研究领域:
无机化学
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生物化学
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药学
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癌症研究
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 29
·42075-42087
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IF 0
Zhang Qian,Lan Xin-yue,Huang Zhi,Liu Yan-ying,Hong Jun-ming
Highly active catalysts with salt and acid/alkali resistance are desired in peroxymonosulfate (PMS) activation processes and marine environment applications. F- and Cl-doped graphene (F-GN and Cl-GN) were prepared via electronegative and atom radius adjustment for tetracycline hydrochloride (TCH) pollution removal to satisfy these requirements. The introduction of special F and Cl functionalities into graphene exhibits superior electron transfer properties for PMS activation, considering the experimental and density functional theory (DFT) calculation results. The TCH degradation efficiency reached up to 80% under various pH and salt disturbance conditions with F-GN and Cl-GN. Cl-GN exhibited an activity superior to F-GN due to the higher electron polarization effect of C atoms adjacent to Cl atoms. The presence of more positive charged C sites in Cl-GN (around Cl doping) is more favorable for PMS attachment and sequence radical generation than F-GN. In addition, the main active species functionalized during reaction included ·OH and SO 4 − ·, and the stability of F-GN and Cl-GN was confirmed to be over 60% by recycle test. Final research results provide an effective strategy for designing and preparing PMS activators resistant to salt, acid, and alkali, thereby expanding their application potential.
研究领域:
环境科学
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材料科学
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DOI
PubMed
Chemistry-An Asian Journal
·
2024
·Vol. 19
·期 24
·e202400798
·
IF 3.5
Haiyun Zhou,Pingping Li,Tingting Zhong,Yunzhen Teng,Siqi Li,Xiaofeng Luo,Xinning Wang,Min Yang,Guowei Deng
Mn doping has been used to improve the physical chemistry of lead halide perovskite nanocrystals such as CsPbX 3 , where X is a halogen ion. In this paper, a two-phase method for Mn-doped CsPbX 3 nanosheets (where X=Br, Cl), namely water-hexane system, is reported. Compared to conventional catalyst arrays, the band gap of CsPbBr 3 nanocrystalline is easily tuned, the carrier diffusion distance is remote, the band edge position of the band structure is favorable for a wide range of electrocatalytic redox reactions, and the catalytic active site is maximally exposed, providing a larger electrolyte contact area. The porous hierarchical structure also accelerates the release of hydrogen bubbles. The results showed that the optimized Mn : CsPbBr 3 catalyst exhibited excellent electrolytic performance of aquatic hydrogen in alkaline electrolyte (1 mol/L KOH). The overpotentials of the oxygen evolution reaction (OER) at the current densities of 10 and 100 mA cm −2 are only 114.4 and 505.4 mV, respectively, with a Tafel slope of 43 mV dec −1 . At a current density of 10 mA cm −2 , the excess potential required for the hydrogen evolution reaction (HER) is 158.6 mV and it exhibits excellent electrochemical stability. The Mn : CsPbBr 3 nanocrystalline consists of two electrodes for hydrolysis of water, requiring only a voltage of 1.45 V. This provides implications for the optimization of electrocatalysts in alkaline electrolytes with the aim of developing next generation 2D electrocatalysts for overall water splitting.
研究领域:
材料科学
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电化学
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纳米技术
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DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yi Duan,Xiaopeng Qi,Xiangtao Bai,Tianwei Yu,Yanlong Wu,Zenghua Chang,Jiantao Wang
Argyrodite Li 6-x PS 5-x Cl 1+x with high ionic conductivity and excellent mechanical performance is an attractive solid electrolyte candidate for all-solid-state lithium batteries (ASSLBs). Adjusting Cl content is an effective strategy to enhance the ionic conductivity, however its effect on the thermal stability remain uncovered. Herein, our study shows that the increase of Cl content in Li 6-x PS 5-x Cl 1+x significantly enhances the ionic conductivity and electrochemical properties but significantly reduces its thermal stability. We reveal that the thermal stability of Li 6-x PS 5-x Cl 1+x is heavily dependent on its Cl content and can be significantly enhanced by elemental doping. LiNi 0.6 Co 0.2 Mn 0.2 O 2 based ASSLBs using Cl-rich argyrodite with pure phase shows better cycle performance. Achievements from this study could serve as a guidance for optimizing and applicating argyrodite solid electrolytes towards high-performance and safe ASSLBs.
研究领域:
材料科学
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电化学
·
能源存储
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DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2022
·
IF 8.431
Sen Lu,Xuechuan Li,Yunkai Liao,Guan Zhang
Efficient removal of low-concentration ammonia from chlorinated wastewater is a challenge for decentralized wastewater treatment due to its notorious environmental effect and lethal influence on aquaculture. Photoelectrocatalytic (PEC) oxidation process is considered as an efficient and environment–friendly approach, whereas a low-cost and stable photoanode is crucial. In this study, TiO 2 nanotubes (TNTs) photoanode (Ar–TNT–500 °C) with excellent physicochemical and photoelectrochemical properties was prepared by optimizing the parameters of anodization, including the voltage/times of anodization and the atmosphere/temperature of heat treatment. During the synthesis, the electrochemical and heat treatment processes promoted the formation of oxygen vacancies (O V ) on the TNTs surface and enhanced its electrocatalytic activity. The optimized Ar–TNT–500 °C photoanode could selectively convert ammonia to N 2 (86%) and a small amount of nitrate (14%). Radical quenching and probe experiments confirmed that the ClO produced by rapid quenching of OH and Cl by free chlorine dominated the selective degradation of ammonia in the synergistic process of photocatalysis and electrocatalysis. The cycle of chlorine-based radicals (ClO and Cl ) and Cl − provided a continuous and efficient ammonia oxidation system, because chlorine-based radicals could efficiently and selectively oxidize ammonia and reduce the production of toxic (per) chlorate.
研究领域:
环境科学
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材料科学
·
化学工程
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Muhammad Amin Padhiar,Minqiang Wang,Yongqiang Ji,Zhi Yang,Yun Zhou,Hengwei Qiu,Hao Wang,Azaz Ali Shah,Arshad Saleem Bhatti
Perovskite nanocrystals (PNCs) are ideal for optical devices due to their adjustable emission band and high photoluminescence. However, blue light-emitting perovskite nanocrystals (PNCs) exhibit poor performance compared to their green and red-emitting PNC counterparts. Herein, we introduce a simple strategy for increasing the stability of blue light-emitting CsPb (Br/Cl)3 PNCs passivated with an Al-doped CdSe layer. This simple strategy successfully achieves highly stable PNCs with photoluminescence (PL) emission ranging from 454 to 460 nm with a full width at half-maximum (FWHM) ranging from 18 to 22 nm; changes in bandgaps are also observed, and the corresponding PLQY values show a significant change after CdSe/Al modification. In addition, CsPb (Br/Cl)3 PNCs with a CdSe layer doped with Al formed on the surface show remarkable stability under ambient conditions, including thermal exposure, water resistance, and ultraviolet (UV) irradiation. A light-emitting diode (LED) device was constructed to demonstrate the feasibility of the approach by combining the optimal CsPb(Br/Cl)3/CdSe/Al PNCs with an existing commercial 365 nm UV chip, resulting in bright blue light emission with CIE color coordinates of (0.16, 0.09). All of the findings suggest that doped CsPb (Br/Cl)3/CdSe/Al PNCs have the potential to be used as color converters in liquid crystal displays (LCDs).
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）