COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Ting Zhang,Li Xia Chen,Yun Qian Zhang,Qian Jiang Zhu,Ying Huang,Zhu Tao
The outer surface interaction of cucurbit[ n ]urils (Q[ n ]s) is an important supramolecular interaction that results from the positive electrostatic potential on the outer surface of Q[ n ]s. It cannot only result in the formation of various novel Q[ n ]-based supramolecular frameworks, but can also lead to clustering emission of Q[ n ]s. In this work, three different Q[8]-based supramolecular frameworks, assembled through the outer surface interaction of Q[ n ]s (OSIQ), were prepared according to the literature. The solid-state clustering-triggered emission (CTE) characteristics of the frameworks were also determined. Moreover, investigation of their adsorption properties showed that the solid-state CTE of the three Q[8]-based supramolecular frameworks was quenched in the presence of certain chemicals and that they exhibited high selectivity for pyridine. Framework B exhibited the highest adsorption of pyridine.
研究领域:
超分子化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 35
·16497-16509
·
IF 3.553
Cheng Rui Xue,Tian Fei Yang,Zhang Yun Qian,Chen Kai,Zhu Qian Jiang,Tao Zhu
Abstract Cucurbit[ n ]uril(Q[ n ])-based supramolecular frameworks assembled through outer surface interactions are characterized by their simple composition, convenient preparation, high yields and controllable structures. The most prominent characteristic of these frameworks is their diversity, with various synthesis methods, structural characteristics, structure directing agents and basic building blocks of Q[ n ]s. In this work, a symmetric tetramethyl-substituted Q[6] (TMeQ[6]) is selected as the basic building block, with three different TMeQ[6]-based supramolecular frameworks obtained from 1-, 3- and 5 mol/L aqueous H 2 SO 4 solutions, respectively. The outer surface interactions between TMeQ[6] and the adjacent SO 4 2− anions or TMeQ[6] units are the main driving forces for the formation of these frameworks, which exhibit adsorption properties for fluorophore dyes and organic isomers. These adsorption characteristics may lead to the application of these frameworks in the synthesis of solid fluorescent sensors for volatile organic compounds and the adsorptive separation of alkane isomers. Graphic abstract
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2018
·Vol. 9
·期 1
·1-10
·
IF 12.353
Li Xinchun,Zhai Tianyou,Gao Pengcheng,Cheng Hongli,Hou Ruizuo,Lou Xiaoding,Xia Fan
Nanochannels with functional elements have shown promise for DNA sequencing, single-molecule sensing, and ion gating. Ionic current measurement is currently a benchmark, but is focused solely on the contribution from nanochannels’ inner-wall functional elements (NIWFE); the attributes of functional elements at nanochannels’ outer surface (NOSFE) are nearly ignored, and remain elusive. Here we show that the role of NOSFE and NIWFE for ion gating can be distinguished by constructing DNA architectures using dual-current readout. The established molecular switches have continuously tunable and reversible ion-gating ability. We find that NOSFE exhibits negligible ion-gating behavior, but it can produce a synergistic effect in alliance with NIWFE. Moreover, the high-efficiency gating systems display more noticeable synergistic effect than the low-efficiency ones. We also reveal that the probe amount of NOSFE and NIWFE is almost equally distributed in our biomimetic nanochannels, which is potentially a premise for the synergistic ion-gating phenomena.
研究领域:
生物物理学
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纳米技术
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2013
·
IF 3.365
Lan-Lan Lou,Huanling Du,Yanbin Shen,Kai Yu,Wenjun Yu,Qiu Chen,Shuangxi Liu
Chiral 9-amino epi -cinchonine was anchored on external surface passivated SBA-15 as well as calcined SBA-15. The two resulting materials were used as catalysts for the asymmetric transfer hydrogenation of aromatic ketones after complexing with [Ir(COD)Cl] 2 . Higher enantioselectivities were obtained over the passivated SBA-15 supported catalyst compared with the catalyst based on calcined SBA-15 as well as the homogeneous counterpart. Especially for the substrate of acetophenone, an obviously high enantiomeric excess (ee) of 74% (homogeneous ee: 60%) was achieved with comparable conversion to the homogeneous catalyst (97% vs. 98%). Furthermore, the passivated SBA-15 supported catalyst demonstrated higher stability during the asymmetric transfer hydrogenation reaction as compared with the catalyst based on calcined SBA-15.
研究领域:
催化化学
·
有机合成
·
材料化学
·
纳米材料
·
均相与多相催化
✓ 已验证
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2024
·Vol. 40
·期 2
·326-332
·
IF 3.1
Liu Huan,Sun Xueting,Dai Yu,Zhang Xiaojin,Xia Fan
Nanochannels have made great progress and are a promising platform for detecting a series of targets. However, most nanochannels are modified on the inner wall, while ignoring the outer surface. Here, we modified the outer surface of nanochannels with hydrogel. Different from other reported outer-surface modification methods, we directly cover nanochannels with hydrogel to form heterogeneous membrane. The selected hydrogel hardly adsorbs other ions and shows specific adsorption for Cr(VI). The adsorption sites in hydrogel are homogeneous, and Cr(VI) adsorption onto hydrogel is endothermic and spontaneous. The charge in hydrogel changes after Cr(VI) adsorption, and the resulting current changes can be used for the detection of Cr(VI) with the detection limit of 10 −11 mol/L. Our platform is expected to be used for Cr(VI) detection in living organisms, especially within cells. This work provides a new approach for outer-surface modification of nanochannels and offers a new choice for nanochannel detection platforms.
研究领域:
纳米技术
·
分析化学
·
环境科学
·
生物传感器
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Weiwei Zhang,Miaoyu Chen,Qun Ma,Zhixiao Si,Sanmei Jin,Qiujiao Du,Limin Zhang,Yu Huang,Fan Xia
Artificial solid-state nanochannels featuring precise partitions present a highly promising platform for biomarker detection. While the significance of probes on the outer surface (POS) has been relatively overlooked in the past, our research highlights their crucial role in biosensing. Furthermore, the contribution of POS on the bullet-shaped asymmetric nanochannels has not been extensively explored until now. Here, we fabricated a series of bullet-shaped nanochannels, each featuring a distinct asymmetric structure characterized by different tip- and base-pore diameters. These nanochannels were further modified with explicit distributions at the inner wall (PIW), the outer surface (POS), and their combination (POS + PIW) for lysozyme sensing. The impact of diameters, structural asymmetry, and surface charge density on the sensing efficacy of POS and PIW was thoroughly examined through experimental investigations and numerical simulations. POS demonstrates great individual sensing performance for lysozyme within a broad concentration range, spanning from 10 nM to 1 mM. Furthermore, it improves the sensitivity when combined with PIW, particularly within the nanochannels featuring the smaller base-pore diameter, resulting in a 2-fold increase in sensing performance for POS + PIW compared to PIW at a concentration of 10 nM. These findings are substantiated by numerical simulations that closely align with the experimental parameters. The contributions of POS are notably amplified in the presence of smaller base pores and a higher degree of asymmetry within the bullet-shaped nanochannels. These findings elucidate the mechanism underlying the role of POS within bullet-shaped asymmetric nanochannels and open up new avenues for manipulating and enhancing the sensing efficiency.
研究领域:
生物传感
·
纳米技术
·
蛋白质分析
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2018
·
IF 0
Xiao Tian,Li Xia Chen,Yu Qing Yao,Kai Chen,Min-Dong Chen,Xi Zeng,Zhu Tao
Upon mixing of aqueous solutions of the freely soluble building blocks cucurbit[7]uril (Q[7]) and 4-sulfocalix[4]arene (SC[4]A), white microcrystals instantly separate in near-quantitative yield. The driving force for this assembly is suggested to be the outer-surface interaction of the Q[n]. Dynamic light scattering, scanning electron microscopy, and NMR (diffusion-ordered NMR spectroscopy) analyses have confirmed the supramolecular aggregation of Q[7] and SC[4]A. Titration 1H NMR spectroscopy and isothermal titration calorimetry have shown that the interaction ratio of Q[7] and SC[4]A is close to 3:1. Moreover, the Q[7]/SC[4]A-based supramolecular assembly can accommodate molecules of some volatile compounds or luminescent dyes. Thus, this work offers a simple and highly efficient means of preparing adsorbent or solid fluorescent materials.
研究领域:
化学
·
超分子化学
·
材料科学
✓ 已验证
DOI
PubMed
Nature Protocols
·
2021
·Vol. 16
·期 9
·4201-4226
·
IF 13.491
Gao Pengcheng,Wang Dagui,Che Cheng,Ma Qun,Wu Xiaoqing,Chen Yajie,Xu Hongquan,Li Xinchun,Lin Yu,Ding Defang,Lou Xiaoding,Xia Fan
Solid-state nanochannels (SSNs) provide a promising approach for biosensing due to the confinement of molecules inside, their great mechanical strength and diversified surface chemical properties; however, until now, their sensitivity and specificity have not satisfied the practical requirements of sensing applications, especially in complex matrices, i.e., media of diverse constitutions. Here, we report a protocol to achieve explicit regional and functional division of functional elements at the outer surface (FE OS ) and inner wall (FE IW ) of SSNs, which offers a nanochannel-based sensing platform with enhanced specificity and sensitivity. The protocol starts with the fabrication and characterization of the distribution of FE OS and FE IW . Then, the evaluation of the contributions of FE OS and FE IW to ionic gating is described; the FE IW mainly regulate ionic gating, and the FE OS can produce a synergistic effect. Finally, hydrophobic or highly charged FE OS are applied to ward off interference molecules, non-target molecules that may affect the ionic signal of nanochannels, which decreases false signals and helps to achieve the highly specific ionic output in complex matrices. Compared with other methods currently available, this method will contribute to the fundamental understanding of substance transport in SSNs and provide high specificity and sensitivity in SSN-based analyses. The procedure takes 3–6 d to complete.
研究领域:
纳米技术
·
生物传感器
·
材料科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Ye-Qi Hu,Hao-Nan Li,Zhi-Kang Xu
An incredible amount of oily wastewater is generated each day all over the world from industrial manufacture and daily life. Numerous attempts have been undertaken to separate these oil/water mixtures, especially those surfactant-stabilized oil-in-water emulsions. Janus membranes with asymmetric wettability are widely regarded as a promising oil/water separation technology with the lowest energy consumption. In this work, we demonstrate the fabrication of Janus hollow fiber membranes (JHFM) with functionalized outer surface for the continuous demulsification and separation of oil-in-water emulsions. Polydopamine and polyelectrolyte are co-deposited onto the outer surface of polypropylene hollow fiber microfiltration membrane to construct a thin charged hydrophilic coating with controllable thickness. The prepared JHFMs are assembled into typical modules which can continuously separate surfactant-stabilized oil-in-water emulsions with high efficiency (recovery ratio >99%, purity >99.8%). The JHFM modules show applicability to both light oil and heavy oil collection in the common cross-flow filtration mode. The influences of operating conditions, including feed flow rate, surfactant content, hydrophilization depth and packing density, are demonstrated in detail on the separation performance. This work is of great significance to the practical application of Janus membranes in the separation of oil/water mixtures, especially surfactant-stabilized oil-in-water emulsions which are intractable to be separated effectively by conventional methods.
研究领域:
环境工程
·
膜科学
·
水处理
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2019
·
IF 4.63
Tingting Zhao,Fuwei Li,Hongchang Yu,Shilei Ding,Zhixia Li,Xinyuan Huang,Xiang Li,Xiaohan Wei,Zhenlin Wang,Hongfei Lin
Conversion of biomass-derived chemicals into light olefins is a promising method to maintain sustainable development of light olefin industry. In this study, three mesoporous ZSM-5 zeolites (MZSM-5-A, MZSM-5-B and MZSM-5-C) with major pore diameter about 4.8 nm, 16 nm and 22 nm were synthesized using a hydrothermal method by utilizing different templates. The catalytic activity of catalysts was studied by catalytic cracking of ethanol and oleic acid. The influence of reaction temperature on conversion and product selectivity was investigated. The characterization of ZSM-5 samples showed that the orders of the external surface area and mesopore volume were MZSM-5-C > MZSM-5-B > MZSM-5-A > conventional HZSM-5. In ethanol to light olefin reaction, MZSM-5-C achieved the highest light olefin yield (318.3 mL g −1 ) and ethylene selectivity (42.3%) at 400 °C. In oleic acid to light olefin reaction, MZSM-5-B achieved a complete conversion of oleic acid at 500 °C, and obtained the highest light olefin selectivity (38.1%) at 550 °C. The difference may be relevant to the size and chemical structure of feedstock molecular as well as the acidity of catalysts. Regardless of ethanol or oleic acid as feedstock, introduction of mesopore in zeolites significantly enhanced the light olefin yield and selectivity.
研究领域:
化学工程
·
催化
·
材料科学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2017
·Vol. 5
·期 41
·8152-8160
·
IF 4.543
Jie Zhang,Jie Wang,Tong Yan,Yanan Peng,Dajun Xu,Dawei Deng
Quantum dots (QDs) exhibit many unique optical properties, and show great promise as fluorescent markers in molecular, cellular and in vivo imaging. In this thematic issue, a major concern is their cytotoxicity. Among various Cd-free alternatives, InP-based QDs without highly toxic heavy metal elements have received the most attention. This article first focuses on the synthetic control of oil-soluble InP/ZnSe/ZnS QDs, exhibiting strong dual emissions, namely, visible excitonic emission and near-infrared (NIR) surface defect emission. Next, the organic-to-aqueous phase transfer of the dual emissive QDs was explored systematically. It was found that the dual emissions are relatively stable against the water transfer strategies used here; among them, aqueous dual emissive QDs obtained by wrapping oil-soluble QDs with a poly(acrylic acid)-octylamine (PAA-based) amphiphilic polymer (or modified with the cRGD peptide) exhibit enhanced NIR emission. Finally, using in vitro cell and in vivo small animal optical imaging techniques, the bioactivities of the cRGD-modified amphiphilic polymer-wrapped QDs were also investigated. The results confirm that single-wavelength excitation with strong dual emissions ranging from 550 to >1000 nm will endow the InP-based QDs with the capability for biomedical optical imaging across different spatial scales, as a promising alternative for Cd- and Pb-based QDs.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
·
光学成像
✓ 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）