SURFACE & COATINGS TECHNOLOGY
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2023
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IF 5.4
Zhiqiang Han,Busheng Zhang,Jieyao Li,Haoqi Guo,Liying Song,Woon-Ming Lau
The surface of a glass plate was molecularly engineered to become antimicrobial by coating it with a self-assembled layer of (3-aminopropyl) trimethoxysilane (APTMS) and then with an overlayer of antimicrobial benzyldodecyldimethylammonium bromide (BAB). Hyperthermal H 2 molecules with a kinetic energy of about 15 eV were used as “bullets” to collide with BAB and APTMS to selectively cleave the C H bonds in them. Subsequent recombination of the carbon radicals thus formed lead to the crosslinking and fixation of BAB to APTMS which is itself strongly bonded to the glass surface via silanization. Molecular dynamics simulations were conducted to validate this peculiar hyperthermal hydrogen induced cross-linking (HHIC) mechanism, and hyperthermal hydrogen molecules with a high flux density over 1 × 10 15 H 2 /cm 2 s for completing the HHIC process in 10 s in reaction-time were experimentally generated with a specifically designed instrument. The glass silanization with APTMS and the fixation of BAB molecules were assessed and confirmed by water contact angle (WCA) measurements, X-ray photoelectron spectroscopy (XPS), as well as atomic force microscopy (AFM). The antimicrobial activity against staphylococcus aureus was confirmed with the standard ISO/DIS 22196 test-method.
研究领域:
材料科学
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生物医学工程
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DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Xuhui Li,Menghan Zhang,Mengyang Yin,Xingming Ning,Zhongwei An,Xinbing Chen,Pei Chen
Advancing flexible zinc-air batteries (ZABs) hinges on efficient bifunctional oxygen electrocatalysts, yet resolving the intrinsic activity trade-off between oxygen reduction (ORR) and evolution reactions (OER) remains a long-standing scientific challenge. Herein, we propose a molecular engineering strategy to optimize the electronic configuration of Fe centers in an iron‑cobalt tetranitro-phthalocyanine complex (FeCoPc-NO 2 ), by Co atoms and electron-withdrawing nitro groups. Density functional theory and electrochemical characterizations unveil that a weak d-d coupling between adjacent Fe/Co atoms tailors the Fe 3d-orbital electron density and the adsorption energies of oxygen-containing intermediates, boosting OER activity (η 10 = 320 mV) and concurrently retaining high ORR performance (E 1/2 = 0.81 V vs. RHE). Moreover, the assembled flexible ZABs achieve a peak power density of 74.9 mW·cm −2 , high round-trip efficiency (65.8 %), prolonged cycling stability (48 h), and mechanical robustness (>90° bending). This study validates the feasibility of atomically precise molecular design in creating bifunctional electrocatalysts with exceptional performance and cost efficiency.
研究领域:
材料科学
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电化学
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纳米催化
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能源存储与转换
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分子工程
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Qiu Zhuang,Hao Chen,Chaofan Zhang,Siyao Cheng,Wei Dong,Aming Xie
The conversion of hexavalent chromium (Cr(VI)), a highly poisonous heavy metal found in natural environment, to less poisonous trivalent chromium (Cr(III)) has attracted a lot of interest. However, little interest has been paid to the development of metal-free catalysts. Here, we demonstrate for the first time a molecular engineering strategy to synthesize a range of donor-acceptor conjugated polymer photocatalysts, which can significantly increase the reduction efficiency of Cr(VI) by a factor of 5.2, corresponding to a significant change in the reduction reaction rate constant (from 0.0337 to 0.1740 min −1 ). In addition, the apparent quantum efficiency (AQE) of Cr(VI) removal was obtained, and the optimized photocatalyst (Py-SO 1 ) could achieve the highest apparent quantum efficiency at wavelength of 420 nm in those samples. Despite the narrow light absorption of Py-SO 1 polymer, its excellent exciton separation efficiency and efficient electron output enabled it to achieve excellent performance in photoreduction of Cr(VI), surpassing that of the reported metal-free photocatalysts. The results show that the present work provides a new perspective for designing suitable environmental remediation catalysts based on molecular engineering strategies.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2025
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IF 4.7
Qiao Fan,Kai Zhang,Yufei Liu,Chong Chen,Lanlan Wei,Yucheng Yin,Tingting Luo,Shigui Peng,Min He,Jie Yu
This work demonstrates a molecular engineering strategy to optimize the capacitive performance of PEDOT:PSS by precisely controlling the structure of the amphiphilic block copolymer PSS-b-PAPEG (poly(styrenesulfonate)-block-poly(allyloxy polyethylene glycol)). Five copolymers with PSS:PAPEG ratios of 2:1, 1.5:1, 1:1, 1:1.5, and 1:2 were synthesized via controlled polymerization and integrated into a PEDOT (poly(3,4-ethylenedioxythiophene)) matrix. Electrochemical testing revealed that the 1:1 ratio composite exhibited a maximum specific capacitance of 32.1 F/g at 1 A/g, attributed to the synergistic effects of microphase-separated dual continuous networks and porous structures. Multiscale characterization (XPS, SEM, TEM, AFM, BET, and contact angle measurements) revealed that the 1:1 ratio forms optimal conductive pathways, interfacial doping, and ionic diffusion channels. This study establishes that block ratio engineering is an effective method for balancing conductivity and ionic pathways in conductive polymer-based supercapacitor electrode materials, providing a theoretical basis for high-performance energy storage materials.
研究领域:
材料科学
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高分子化学
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电化学
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能源存储
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纳米结构材料
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功能高分子
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界面工程
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产品关联
DOI
高影响因子
Advanced Healthcare Materials
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2023
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IF 10
Tingting Zhao,Yanli Xu,Rui Liu,Xiaofei Shang,Ciyuan Huang,Wuqi Dong,Min Long,Bingsuo Zou,Xianwen Wang,Gang Li,Yuxian Shen,Tao Liu,Bo Tang
The greatest barrier to the further development and clinical application of tumor image-guided photodynamic therapy (PDT), is the inconsistency between the fluorescence intensity and singlet oxygen generation yield of the photosensitizer under light excitation. Herein, a novel donor–acceptor (D–A) system is designed from the point of molecular selection by wrapping a classical porphyrin molecule (5,10,15,20-tetraphenylphorphyrin, H 2 TPP) as an acceptor into conjugated polymer (Poly[N,N'-bis(4-butylpheny)-N,N'-bis(phenyl)benzidine], ADS254BE) as a donor through fluorescence resonance energy transfer (FRET) mechanism, which exhibits bright red emission centered at 650 nm (quantum yield, 0.12), relatively large Stoke shift of 276 nm, enhanced singlet oxygen generation rate of 0.73, and excellent photostability. The investigations on distribution and killing effect of nanomaterials in cancer cells reveal that ADS254BE/H 2 TPP NPs can accumulate in the cytoplasm for imaging while simultaneously producing a large amount of singlet oxygen to remarkably kill cancer cells, which can be used for real-time image-guided PDT. In the xenograft tumor model, real-time imaging and long-term tracing in tumor tissue with ADS254BE/H 2 TPP NPs disclose that the growth of lung cancer in mice can be effectively inhibited during in situ imaging. From the standpoint of molecular engineering design, this work provides a feasible strategy for novel D–A systems to improve the development of image-guided PDT.
研究领域:
生物医学
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纳米医学
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肿瘤学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2019
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IF 7.015
Min Hu,Liang Ding,Muhammad A. Shehzad,Qianqian Ge,Yahua Liu,Zhengjin Yang,Liang Wu,Tongwen Xu
Anion exchange membranes (AEMs) are crucial components for advanced energy and environment processes including alkaline fuel cells , redox flow batteries , and industrial effluent treatment; while low anionic conductivity and poor stability remain the major challenges for the widespread implementation of AEMs. Through molecular engineering, comb-shaped AEMs have been proved possessing the capability of delivering both high conductivity and good alkaline stability. However, how to precisely control the side chain topology and how the chain topology would influence the membrane properties need to be further elucidated. We hereby propose a radically novel and readily scalable route towards the controllable synthesis of comb-shaped AMEs and we were able to determine the length of side chains and the number of ionic groups along the side chains. To probe the effect of side chain topology on membrane properties, two types of AEMs of densely grafted short side chains or loosely grafted long side chains with similar ion exchange capacity (IEC, ∼1.7 mmol/g) were synthesized and compared. We found that the comb-shaped AEMs with loosely grafted long chains (LG-LS-DIm), with higher hydroxide conductivity (55 mS cm −1 at 30 °C) and better alkaline stability (∼80 % of IEC retention after soaking in 2 mol L −1 NaOH solution at 60 °C for 25 days), outperform those with densely grafted short chains (HG-SS-DIm) and the benchmark main-chain type AEMs (DIm-PPO), which is also superior to those of conventional linear AEMs with densely functionalized structure.
研究领域:
能源材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2015
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IF 4.504
Jiangyi Mao,Xiaoyu Zhang,Shih-Hung Liu,Zhongjin Shen,Xing Li,Wenjun Wu,Pi-Tai Chou,Jianli Hua
The electron-accepting and anchoring group plays a significant role on the optical and electrochemical properties of an organic dye. They also affect the intramolecular charge transfer, the electron injection processes and the adsorption mode, hence the photostability of the dye on TiO 2 films. In this study, we have designed and synthesized two new D-A-π-A dyes ( RD-III and RD-IV ) with 2-(1,1-dicyanomethylene) rhodanine (DCRD) as electron-accepting and anchoring group. For comparison, an analogue of RD-III , namely CA-III , with cyanoacrylic acid (CA) as the acceptor was also prepared. We have carefully examined their optical and electrochemical properties, device performance and electrochemical impedance spectroscopy (EIS). Supplementary support is given by computational approach to gain in-depth insight into the adsorption states and electron contributions. The theoretical calculation of dye/(TiO 2 ) 38 displayed that the angle between the molecule of RD-III and the surface of TiO 2 was only 31.84 0 in contrast to 97.16 0 for CA-III . This adsorption state can facilitate dye aggregation and charge recombination, resulting in a decrease of short circuit current density ( J sc ) and open circuit voltage ( V oc ). Further improvement has been successfully made by adding long alkoxy chains with large steric hindrance. After introducing the alkoxy chains, the dihedral angle between RD-IV and TiO 2 increased to 42.61 0 and the steric hindrance can inhibit dye aggregation and charge recombination. Therefore, higher photoelectric conversion efficiency of 5.53 % was obtained with RD-IV in DSSC devices compared with 4.51 % for DSSC based on RD-III .
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
Small
·
2025
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IF 12.1
Yisen Huang,Shengdu Yang,Xiaofeng Chi,Pan Tian,Lei Wang,Wanjing Liu,Weiyi Ding,Zhao Lu,Liwei Yan,Huawei Zou,Yang Chen
Organic–inorganic thermosetting hybrids, featuring unique self-ceramization abilities and excellent thermal-oxidative stabilities, are garnering substantial interest as candidates for thermal protection in extreme environments. However, designing a groundbreaking hybrid with a molecular-scale bicontinuous network remains a formidable challenge. In this work, a novel approach is proposed to prepare bicontinuous thermosetting hybrids with the aid of an organic–inorganic covalent–ionic molecule: 3-carboxyphenylboronic acid (3-CPBA) functionalized calcium phosphate oligomer (CPO), named 3-BAPO. By tailoring the supramolecular interactions between 3-BAPO and boron-phenolic resin (BPR), a series of hybrid precursors is successfully obtained, designated 3-BRPO, with varying inorganic contents (13.5–25.9 wt%). The hybrid precursors undergo concurrent inorganic ionic crosslinking and organic phenolic curing synchronously under reasonable conditions, resulting in the formation of a covalent-ionic bicontinuous network. Multiple chemical interactions between the organic and inorganic components drive the formation of this network, imparting superior high-temperature oxidation resistance to the 3-BRPO hybrids, achieved by in situ ceramization of the continuous inorganic phase at ultrahigh temperatures. This work demonstrates a novel strategy to avoid the separate nucleation of the organic and inorganic phases in thermosetting hybrids by employing organic-functionalized ionic oligomers as inorganic components, providing a promising platform for the molecular engineering of advanced hybrid materials.
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
PubMed
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2025
·
IF 6.3
Xin Liu,Ruixue Hu,Shiran Zhu,Xiangyu Liu,Yu Fang,Yihang Li,Wei Wei
Background The demand for adsorption technologies that facilitate the recovery and upcycling of the valuable metallic element, Co, has been increasing. The recovery of Co from wastewater using metal–organic frameworks (MOFs), which are promising adsorbents, is considerably limited because of the lack of selective adsorption sites. Furthermore, research on the upcycling of Co remains inadequate. Methods Herein, we develop an integrated strategy combining ion imprinting modification and photodeposition for the selective recovery and upcycling of divalent Co ions (Co(II)) using MOF adsorbents. Significant findings First, Co ion–imprinted sites are constructed on a typical MOF adsorbent, MIL-125 (labeled CoIP-ML), via molecular engineering using glycylglycine. Compared with the original aminated MIL-125, CoIP-ML exhibits a superior performance, achieving the maximum adsorption capacity ( q m = 218.6 mg/g) and selectivity (selective coefficient k Co(II)/Ni(II) = 3.61) for Co(II) via the chelation of Schiff base groups and adsorption at terminal carboxyl groups. The Co(II) adsorbed on CoIP-ML is upcycled through a facile photodeposition process into Co oxides, which function as a Fenton-like catalyst. The optimal catalyst effectively activates peroxymonosulfate for the removal of chloroquine diphosphate and chlortetracycline hydrochloride, achieving the upcycling of Co(II). This study presents a unique MOF-functionalization paradigm.
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产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yukun Shi,Chuying Zhang,Na Zhang,Jiajia Xue,Shuyang Zhou,Hao Teng,Jinbo Bai,Hang Zhao
Polymer-based electrostatic capacitors have a broad application prospect in modern electric power systems due to their advantages of high breakdown strength ( E b ) and power density. However, at high-temperatures, both the increase in dielectric loss and the deterioration of insulation properties triggered by the Joule heat result in a sharp decrease in the energy storage property of polymer-based capacitors, which greatly restricts the development of advanced electronics. To address this challenge, this study proposes a molecular engineering strategy that constructs an inorganic-organic cross-linked system with strong interfacial bonding via covalent linkages between amino-functionalized alumina (Al 2 O 3 –NH 2 ) nanorods and the polyimide (PI) matrix. This design enables synergistic regulation of charge transport through cross-linked networks and interfacial traps, effectively suppressing conductive losses in the composite at elevated temperatures. Notably, at 150 °C with a charge-discharge efficiency ( η ) of 92 %, the 1.5 wt% Al 2 O 3 -NH 2 /PI composite achieved a high energy storage density ( U e ) of 4.74 J/cm 3 , which was 204 % higher than that of pure PI ( U e ∼ 1.56 J/cm 3 ). Thus, this study provides a promising strategy for advancing high-temperature energy storage capacitors.
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产品关联
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Gan Zhang,Tingting Liu,Huadong Cai,Yan Hu,Zhifang Zhang,Meifeng Huang,Juan Peng,Weihua Lai
The application of traditional lateral flow immunoassay (LFIA)-based gold nanoparticles (AuNPs) to measure traces of target chemicals is usually challenging. In this study, we developed an integrated strategy based on molecular engineering and the spatial confinement of nanoparticles (NPs) to obtain ultrahigh quantum yields (QYs) of aggregation-induced emission (AIE) fluorescence NPs and employed them for the highly sensitive detection of T-2 toxin on the LFIA platform. Tetraethyl-4,4′,4″,4‴-(ethene-1,1,2,2-tetrayl)tetrabenzoate (TCPEME), an AIE luminogen, was designed using molecular engineering to lower the energy gap, achieving higher QYs (26.26%) than previous AIEgens (13.02%). Subsequently, TCPEME-doped fluorescence NPs (TFNPs) achieved ultrahigh QYs, up to 84.55%, which were generated from the strong restriction of the NP state, efficiently suppressing nonradiative relaxation channels verified by ultrafast electron dynamics. On the LFIA platform, the sensitivity of the designed TFNP-based LFIA (TFNP–LFIA) was 10.4-fold and 4.3-fold more sensitive than that of the AuNP–LFIA and TPENP–LFIA for detecting the T-2 toxin, respectively. In addition, TFNP–LFIA was used for detecting T-2 toxin in samples and showed satisfactory recoveries (79.5 to 122.0%) with CV (1.49 to 11.75%), which implied excellent application potential for TFNP–LFIA. Overall, dual improvement of the molecule in fluorescence performance originating from the molecular engineering and spatial confinement of NPs could be an efficient tool for promoting the development of high-performance reporters in LFIA.
研究领域:
生物化学
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纳米医学
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分析化学
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产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2025
·
IF 14.1
Zhimin Kou,Ye Sha,Lihong Hu,Meiting Liu,Fuchun Huang,Jie Wang,Caiying Bo,Yonghong Zhou,Dawei Zhao,Puyou Jia
Ionogels have emerged as a groundbreaking category of materials for flexible electronics, yet the challenge of integrating high mechanical stretchability, rapid electrical response, and reliable self-repair in bio-based ionogels persists. Here, a lignin-derived ionogel is presented, designated P(LA-TA)-gel, through a straightforward, one-step solvent-free process. By leveraging arginine-grafted lignin-terminated polythioctic acid and incorporating imine and hydroxyl groups into the supramolecular framework, the P(LA-TA)-gel with both dynamic disulfide bonds and supramolecular hydrogen bonds achieves effective energy dissipation channels. This configuration adeptly balances mechanical stretchability—exhibiting a strain of 1233%—with dynamic reversibility, evidenced by an adhesion strength of 335.5 kPa. Notably, the P(LA-TA)-gel showcases rapid response characteristics, achieving a response time of 0.1 s, along with high ionic conductivity of 17.36 mS cm −1 and robust self-healing capabilities exceeding 90%. When utilized in flexible sensors, this ionogel demonstrates a wide response range and high sensitivity. This study establishes a sustainable platform for the development of next-generation flexible sensors and highlights significant potential applications across wearable electronics, electronic skin technology, and soft robotics.
研究领域:
高分子科学
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材料科学
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生物医学工程
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柔性电子学
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可持续能源材料
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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）