PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2023
·Vol. 25
·期 12
·8913-8920
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IF 3.3
Zhen Chi,Jia Xu,Shida Luo,Xia Ran,Xiaojuan Wang,Pingan Liu,Yulu He,Yanmin Kuang,Lijun Guo
Triplet energy transfer (TET) from semiconductor quantum dots (QDs) to molecular triplets has potential applications in photon up-conversion and singlet oxygen generation. Here, we have constructed a complex consisting of CdTe QDs as the donor and 9-anthracenecarboxylic acid (ACA) as the triplet acceptor, and studied the TET pathways and enhanced singlet oxygen generation properties. The results from steady-state and time-resolved spectroscopy demonstrate efficient TET with a total efficiency of over 80% from photoexcited CdTe QDs to ACA. Dynamical analysis clearly indicates two distinctive TET channels – hot electron exchange and thermalized electron exchange – mediating the TET process in the CdTe QDs–ACA complex. The TET efficiencies from hot electron exchange at high energetic levels and thermalized electron exchange on the lowest exciton state can reach ∼27% and ∼85%, respectively, following 530 nm excitation. This efficient TET endows the CdTe QDs–ACA complex with a good capability of generating singlet oxygen species with a yield of up to ∼59%. These findings contribute further insights to the mechanisms of interfacial TET processes and are significant in designing efficient TET systems based on semiconductor nanoparticles and triplet molecules.
研究领域:
材料科学
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光化学
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纳米技术
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PubMed
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Zhenxing Chen,Lifeng Gui,Hao Wang,Xiaohui Lu,Congcong Wu,Xiaojie Yang,Yanyan Li,Li Zhao,Shimin Wang
Interface recombination is the main challenge associated with the MAPbI 3 perovskite solar cells. Aim of this study was to inttroduce anthracene rings into the g-C 3 N 4 framework to enhance the conjugation as well as electron extraction and transport capabilities. It showed that the introduction of a conjugated system containing anthracene ring modified g-C 3 N 4 (AACN) as an interface modification layer reduced the interfacial carrier recombination resulting in an increase of device efficiency from 11.35 % to 14.97 %. Under unpacked condition, 500 h of testing at a relative humidity of 30 %, the AACN modified MAPbI 3 perovskite solar cells showed efficiency retention of 80 % compared to 56 % retention observed for MAPbI3 perovskite solar cells. It provides an insight for the application of conjugated systems to modify g-C 3 N 4 and its application in photovoltaic devices.
研究领域:
材料科学
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光伏技术
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PROGRESS IN ORGANIC COATINGS
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2024
·
IF 6.5
Yajun Xu,Jialong Zhang,Xiangfei Zheng,Liang Xu,Jingcheng Liu
The bottom anti-reflective coating (BARC) can enhance the resolution of nanopatterns in the lithography process. In this work, a series of copolymers P(GA- co -HPMA) containing anthracene group were synthesized using glycidyl methacrylate (GMA), hydroxypropyl methacrylate (HPMA) and 9-anthracene carboxylic acid (ACA) as monomer. The copolymers were characterized by fourier transform infrared (FTIR) spectroscopy, nuclear magnetic resonance ( 1 H NMR) spectroscopy, gel permeation chromatography (GPC), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and ultraviolet absorption (UV–Vis). Next, bottom anti-reflective coatings (BARC) were prepared using P(GA- co -HPMA), p-toluenesulfonic acid (PTSA), highly methyletherified melamine (HMMM) and solvents. The influence of copolymers with different anthracene concentrations was studied on the properties of BARC, and the optimal BARC-4 exhibited commendably low surface roughness and excellent optical performance (n value and k value at 248 nm). At the first minimum film thickness, the reflectivity is reduced to nearly 0 %, making it suitable for use with KrF photoresist.
研究领域:
材料科学
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光刻技术
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高影响因子
CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Kai Gou,Lei Wang,Minghui Wei,Jingtao Jiang,Gengsheng Weng
Morphing a two-dimensional (2D) plate into customized three-dimensional (3D) structures with complex curvatures is of great importance for developing the next generation of soft robotics, flexible devices, and sensors. Yet, the practical application of shape-morphing materials remains challenging due to the material’s inhomogeneous or discontinuous design. Herein, we demonstrate a biomorphogenesis-inspired paradigm that utilizes the ultraviolet mapping-based thickness gradient (UVM-TG) design for the shape transformation of bilayer-structured polymer sheets composed of a hydrogel layer and a hydrophobic polymer layer. The hydrophobic polymer layer as the passive layer is laser-engraved to create the thickness gradient distribution, which programs the dehydrative-shrinking-driven 3D shape transformation of the bilayer polymer sheets to deform into 3D structures with complex Gaussian curvatures, e.g., gourd and roadster. These 3D structures without uncontrollable surface buckling and wrinkles during those nonzero Gaussian curvature shape transformations exhibit reversible shaping/flattening switchability. Our UVM-TG design strategy, which does not require the inhomogeneous or discontinuous design of shape-morphing materials, establishes a facile strategy for fabricating shape-morphing materials.
研究领域:
材料科学
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生物启发工程
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Hongyan huang,Shengji Wu,Hui Wang,Jie Zhou
Thermal pretreatment reduces rather than improves Hg 0 removal of AC. • Acidic functional groups serve as the active centers for Hg 0 oxidation. • Hydrogen-bonded microenvironment enhances catalytic activity of acidic sites. • Synergy of acid sites and microenvironment enables high-efficiency Hg 0 removal. Activated carbon injection is a mainstream technology for elemental mercury (Hg 0 ) removal from flue gas. This study investigates an abnormal phenomenon that thermal pretreatment of AC reduces rather than improves its Hg 0 removal efficiency, and systematically elucidates the underlying mechanism. The results demonstrate that acidic sites (e.g., carboxyl groups) on the AC surface serve as the active centers for the catalytic oxidation of Hg 0 , while the hydrogen-bonded microenvironment formed by adsorbed H 2 O molecules significantly enhances the acidity strength and catalytic activity of the acidic sites. Removal of the hydrogen-bond microenvironment severely reduces Hg 0 removal performance, whereas supplementation of H 2 O or other hydrogen-bond donor molecules effectively recovers the Hg 0 removal efficiency. At medium-to-high temperatures, constructing a thermally stable microenvironment (e.g., using benzoic acid) significantly improves the Hg 0 removal efficiency of AC. Based on this synergistic mechanism, the acid-treated and benzoic acid-modified AC (AC-H-150-benzoic acid) could achieve an initial Hg 0 removal efficiency of 75.8% at 150 °C. This work reveals the synergistic effect between acidic sites and the hydrogen-bonded microenvironment on AC for Hg 0 removal, providing new insights for the rational design of high-performance Hg 0 removal adsorbents. Download: Download high-res image (182KB) Download: Download full-size image
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ADVANCED FUNCTIONAL MATERIALS
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2026
·
IF 19.9
Pengpeng Li,Jiahao Zhang,Yike Jin,Zifan Xu,Guohua Sun
Helical micro-nanomaterials with intelligently controllable, multi-color circularly polarized luminescence (CPL) have garnered significant interest for their promising applications in chiral chemistry, photonics, and electronics. However, the precise and convenient fabrication of multi-color and white CPL-active flexible nanofibers featuring continuous helical topological structures remains challenging, particularly in the deformable solid nanomaterials. In this study, we employed a soft (polyurethane elastomer)/ hard (conjugated helical polymer/ cellulose/fluorescent dyes) bicomponent electrospinning strategy, through which helically chiral luminescent nanofibers with predominant single-handedness were spontaneously formed due to intercomponent strain mismatch. By constructing hierarchical helices from the molecular to the mesoscopic scale, we achieved a biomimetic chiroptical flexible material that exhibits unique chirality amplifications. This work reveals a previously unreported synergistic strategy for the construction of mesoscopic chiral luminescent helical nanofibers. Furthermore, owing to the excellent flexibility and designability of electrospun nanofibers, as well as the unique physical and optical properties provided by chiral helical polymers and mesoscopic helical micro-and nanofibers, the prepared multicolor and white CPL-active nanofibrous films demonstrate promising application prospects in circularly polarized LED devices, blue-light blocking films, and even as substitutes for flexible liquid crystal cells—highlighting the innovation and potential of this research system.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2024
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IF 8
Jie Zhong,Hang Wei,Jian-Xiong Xie,Yu-Hui Wu,Bing Tang,Qi Zou,Peng-Ran Guo,Zhi-Liang Chen
The use of wetland plants in the context of phytoremediation is effective in the removal of antibiotics from contaminated water. However, the effectiveness and efficiency of many of these plants in the removal of antibiotics remain undetermined. In this study, the effectiveness of two plants— Phragmites austr alis and Iris pseudacorus —in the removal of tetracycline (TC) in hydroponic systems was investigated. The uptake of TC at the roots of I. pseudacorus and P. australis occurred at concentrations of 588.78 and 106.70 μg/g, respectively, after 7-day exposure. The higher uptake of TC in the root of I. pseudacorus may be attributed to its higher secretion of root exudates , which facilitate conditions conducive to the reproduction of microorganisms. These rhizosphere-linked microorganisms then drove the TC uptake, which was higher than that in the roots of P. australis . By elucidating the mechanisms underlying these uptake-linked outcomes, we found that the uptake of TC for both plants was significantly suppressed by metabolic and aquaporin inhibition, suggesting uptake and transport of TC were active (energy-dependent) and passive (aquaporin-dominated) processes, respectively. The subcellular distribution patterns of I. pseudacorus and P. australis in the roots were different, as expressed by differences in organelles , cell wall concentration levels, and transport-related dynamics. Additionally, the microbe-driven enhancement of the remediation capacities of the plants was studied comprehensively via a combined microbial-phytoremediation hydroponic system. We confirmed that the microbial agents increased the secretion of root exudates, promoting the variation of TC chemical speciation and thus enhancing the active transport of TC. These results contribute toward the improved application of wetland plants in the context of antibiotic phytoremediation .
研究领域:
环境科学
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植物学
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Scientific Reports
·
2016
·Vol. 6
·期 1
·1-11
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IF 5.228
Liu Hongmei,Chang Hong,Lv Jia,Jiang Cong,Li Zhenxi,Wang Fei,Wang Hui,Wang Mingming,Liu Chongyi,Wang Xinyu,Shao Naimin,He Bingwei,Shen Wanwan,Zhang Qiang,Cheng Yiyun
Polymers are widely used as non-viral carriers for siRNA delivery, but concern has also arisen in their limited efficacy and inherent toxicity. Whilst many of previous efforts have been documented towards improving the performance of polymers via chemical modifications, the structure-activity relationships (SAR) of these ligand-modified polymers are not well understood. To address this issue, we systemically prepared a library of surface-engineered dendrimers (>300) as the screening pool to discover efficient siRNA carriers. The modified ligands include alkyls and fluoroalkyls, amino acids, benzene derivatives and heterocyclic compounds. Gene silencing results showed that the lead material shows excellent efficacy even in hard-to-transfect cells such as mesenchymal stem cells. The SAR studies revealed that ligands containing appropriate hydrophobicity, or ligands with both hydrophobic and functional atoms/groups are essential for polymers to achive efficient knockdown efficacy. A second-generation library designed based on the above principles further confirms the proposed design criteria. The results enable the future rational design of potent siRNA carriers.
研究领域:
药学
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分子生物学
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纳米技术
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高影响因子
CARBON
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2018
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IF 7.082
Kui Li,Miao Sun,Wei-De Zhang
Polycyclic aromatic compounds with strong conjugated effect, possess the advantage of improving electronic polarizability , thus accelerating the electron transportation. Here, a facile copolymerization between urea and polycyclic aromatic compounds (benzoic acid, naphthoic acid and anthroic acid) has been applied to constructing aromatic rings-grafted graphitic carbon nitride (GCN) photocatalysts . Incorporation of aromatic rings in the GCN network is an effective protocol to extend its π-conjugated system for visible light harvesting and improves the charge transfer efficiency for prolonging lifetime of photogenerated charge carriers in photocatalytic reactions. The corresponding characterization methods demonstrate that the aromatic rings-modified GCN can effectively narrow the bandgap to favor broad band visible light absorption and suppress recombination of electrons and holes. Remarkably, the moderate conjugated effect of aromatic rings (naphthalene) is crucial to promote charge separation. The developed naphthalene-grafted GCN achieves the highest water splitting performance with hydrogen evolution rate up to 102.1 μmol h −1 , nearly 3.5 times of that of the GCN, and apparent quantum efficiency reaches 5.6% at 450 nm. This finding reveals that the conjugated effect of aromatic rings is significant to control photocatalytic property and brings new ideas for designing aromatic system-modified GCN as highly active photocatalysts towards solar-to-chemical energy conversion.
研究领域:
材料科学
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能源化学
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2017
·
IF 3.012
Yinhui Yi,Odoom Jibrael Kingsford,Mwenze Nkulu Fiston,Junjuan Qian,Zhenjiang Liu,Lirong Liu,Gangbing Zhu
Due to the harmful nature of 4,4′-diaminobiphenyl (DABP) to the environment and human health, the determination of DABP is of great significance and has received great attention. However, there is no electrochemical method reported to detect DABP. In this paper, perylenetetracarboxylic acid (PTCA) noncovalently functionalizes carbon nanohorns (PTCA-CNHs) nanohybrids were produced using a simple method and applied for the first electrochemical sensing of DABP. Herein, PTCA has two key advantages for functionalizing CNHs in DABP analysis: (I) PTCA could improve the dispersibility of CNHs in water and (II) enhance the accumulation capacity of DABP on PTCA-CNHs surface by means of the electrostatic interactions between PTCA (negative) and DABP (positive). The results show that the oxidation current of DABP at the PTCA-CNHs modified screen printed carbon electrode (SPCE) is much higher than that of the CNHs/SPCE and bare SPCE. The PTCA-CNHs/SPCE has a linear response range of 5.0 to 400.0 nM with a detection limit of 1.8 nM towards DABP detection.
研究领域:
环境科学
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分析化学
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材料科学
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2015
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IF 2.495
Chao Xu,Yong Chen,Heng-Yi Zhang,Yu Liu
A crown ether-based supramolecular gel with a three-dimensional network structure was successfully constructed via a hierarchical induced assembly strategy and characterized by UV/vis NMR, viscometry and DLS. Therein, the coordination linkage of bis(terpyridyl)dibenzo-24-crown-8 1 with Zn 2+ produces the 1 /Zn 2+ supramolecular polymer as the primary assembly. Then, the anthryl-dibenzylammonium guest 2 was grafted to the 1 /Zn 2+ supramolecular polymer via the non-covalent association of dibenzylammonium moieties on guests with the dibenzo-24-crown-8 rings on supramolecular polymer. Furthermore, the supramolecular polymer with anthryl grafts underwent a photo-induced secondary assembly to produce the supramolecular gel, which could be reversibly disassembled by a thermo-induced dissociation of anthracene dimers. These photo/thermo-induced hierarchical assembly/disassembly behaviors will provide a potential way to construct degradable hierarchical supramolecular assemblies employing environment-friendly external stimuli, such as light and heat, as controlling method.
研究领域:
化学
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材料科学
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高影响因子
Journal of Materials Chemistry B
·
2017
·Vol. 5
·期 46
·9175-9182
·
IF 4.543
Jie Gao,Caihong Wang,Hongliang Tan
This work demonstrated the potential of zeolitic imidazolate framework-8 (ZIF-8) as a host for the co-encapsulation of multiple fluorescent cargos to fabricate fluorescent composites for ratiometric sensing. The one-pot self-assembly of 2-methylimidazole, zinc nitrate, 9-anthracenecarboxylic acid (AnC), and polystyrene sphere doped with europium chelate (EuPS) in methanol solution can lead to the formation of dual-emissive EuPS@AnC/ZIF-8 with excellent fluorescent activity. Based on the distinct fluorescent responses of Eu3+ and AnC to singlet oxygen (1O2), EuPS@AnC/ZIF-8 can be developed as a ratiometric sensor for 1O2 detection. In this ratiometric sensor, Eu3+ fluorescence was employed as a reference signal for providing built-in correction to avoid environmental effects, while AnC fluorescence served as a response signal to detect 1O2 because of its turn-off behavior upon reacting with 1O2. Benefiting from the confinement effect of the ZIF-8 host, the presented sensor showed high sensitivity toward 1O2 with a detection limit of 43 nM and excellent selectivity over other reactive oxygen species. More attractively, the target responsive fluorescent color change of EuPS@AnC/ZIF-8 allowed 1O2 to be easily identified by the naked eye under a UV lamp. We hope that this study will provide a new insight into the design and application of multifunctional composites based on metal–organic frameworks.
研究领域:
材料科学
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生物医学工程
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化学
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PubMed
高影响因子
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