ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 32
·期 14
·2104519
·
IF 18.808
Haijie Ben,Gaojie Yan,Haiyang Liu,Cancan Ling,You Fan,Xiaojie Zhang
The efficiencies of semiconductor photocatalysis are always severely restricted by the rapid recombination of charge carriers in the bulk phase, while local polarization is an efficient scenario to conquer the above issue to boost the photocatalytic performance. Here, as a proof-of-concept demonstration, local charge polarization induced by the intrinsic zwitterionic resonance structure of photocatalysts is reported. A novel squaraine-based covalent organic framework (SQ-COF-1) photocatalyst with an interesting zwitterionic resonance structure is creatively developed. Meanwhile, the comparison samples (SQ-COF-2 and PDA-COF) based on similar COF structure with tunable local polarity are accordingly designed and prepared. The local charge polarization generated from the zwitterionic resonance structure profoundly redistributes and separates the charge carriers, as evidenced by experimental and theoretical results collectively. Benefiting by the largest local polarization, SQ-COF-1 exhibits superior visible-light-driven photocatalytic activities than SQ-COF-2, PDA-COF, and commonly used polymeric carbon nitride photocatalyst. This work presents a local charge polarization protocol for engineering charge behavior to promote photocatalysis, which shows great promise for the future design of high-performance photocatalytic materials.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Xiaopeng Fan,Dan Zhang,Hongjuan Li,Shiguo Sun,Yongqian Xu
A novel near infrared (NIR) fluorescent hybrid system ( PD-SQ ⊂ BSA ) assembled from squaraine dye PD-SQ and bovine serum albumin (BSA) was developed for selective detection of Ag + over other metal ions in absolute PBS. The detection limit of PD-SQ ⊂ BSA for Ag + is calculated to be about 8.99 × 10 −8 M, which is lower than the guidelines for drinking water set by the WHO. PD-SQ alone shows very weak fluorescence due to aggregation-caused quenching (ACQ) property. BSA can cause PD-SQ to partially disaggregate through electrostatic and hydrophobic interactions, but various metal ions including Ag + cannot do. Interestingly, the presence of both BSA and Ag + can trigger PD-SQ to almost completely disaggregate through synergic binding of multiple S-Ag linkings derived from the biothiol moieties in BSA and PD-SQ with Ag + , resulting in obvious turn-on fluorescence change. Absorption and field emission scanning electron microscope (FESEM) spectra have been used to prove the conversion of PD-SQ from aggregates to monomers. In addition, based on the fluorescence spectra changes of PD-SQ ⊂ BSA system upon addition of Hg 2+ and ethylenediaminetetraacetic acid (EDTA), logic circuits including AND and INHIBIT logic gates with reset function were successfully constructed. This type of fluorescent system shows great potential for disease diagnosis, environmental protection, and information protection at the molecular scale.
研究领域:
生物化学
·
环境科学
·
分子生物学
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-8
·
IF 4.259
Feng Ruizhi,Shi Weining,Wang Dejia,Wen Jia,Li Hongjuan,Sun Shiguo,Xu Yongqian
Optical activity of hierarchical supramolecular assemblies based on organic dyes would create multiple functional architectures. In this work, three kinds of silica nanoparticles with or without functional groups were synthesized. For the first time, silica nanoparticles can induce positively charged squaraine (SQ) to aggregate to form supramolecular assemblies. Adenosine-5′-triphosphate (ATP) as building blocks was absorbed on the surface of silica nanoparticles through metal-anion coordination and electrostatic interactions, in which the aggregates of SQ was transferred to monomer. The thickness being composed of ATP and SQ on the outside of nanoparticles is about 5 nm. These supramolecular assemblies showed selective turn-on fluorescence response to ATP in near infrared (NIR) region over other ions through metal-anion coordination and electrostatic interactions. These functional silica nanoparticles possessing many advantages provide proof-of-principle “seed crystals” for construction of supramolecular assemblies and platforms for sensing with facile performance.
研究领域:
材料科学
·
生物化学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2025
·Vol. 12
·期 22
·2416249
·
IF 14.1
Tianyi Tan,Yu Cao,Changlong Chen,Sanliang Ling,Gaolei Hou,Martin J. Paterson,Xin Wang,Ying Chen,Kai Jiang,Gang He,Goran Ungar,Georg H. Mehl,Feng Liu
For a series of novel hydroxy anilino squaraines (SQ), separated via short flexible spacers from bulky dendrons, hexagonal columnar (Col hex ) liquid-crystalline (LC) phase behavior is detected. The optical properties of these SQ systems, designed for melting below 80 °C, very low for SQ systems, are found to be determined by the LC structures which in turn are governed by volume and steric effects of the dendrons affecting the temperature-dependent interplay between monomeric species and H-aggregates in the LC state, ultimately responsible for the optical properties. Experimental results are corroborated by self-consistent field theory (SCFT) as well as time-dependent density functional theory calculations (TD-DFT). The results demonstrate a new strategy for dynamically tuning aggregates and optical properties for the prescriptive functionalization of the LC SQ materials and with potential for other aggregating systems.
研究领域:
材料科学
·
液晶化学
·
有机电子学
·
光学材料
·
超分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanophotonics
·
2023
·
IF 7.5
Xiao Chen,Xiaopeng Ma,Gui Yang,Guan Huang,Haibing Dai,Nian Liu,Jianbo Yu
The unique optical properties of squaraine dyes make them promising for cancer phototheranostics, but the reported squaraines for in vivo treatments mainly rely on their photothermal effect, where monotherapy cannot achieve the desired therapeutic effect. Here we generated a type of squaraine capable of killing tumors through both photothermal and photodynamic effects. We optimized squaraine structure with selenium modulation and formulated it into nanoparticles that showed strong absorption of infrared light, negligible fluorescence, good photothermal conversion (66.6 %), and strong photodynamic effects even after several irradiation cycles. In addition, the nanoparticles could be tracked through their strong optoacoustic signal. In mice, the nanoparticles effectively accumulated in tumors and eliminated them upon irradiation, without causing adverse effects. Our work demonstrates the potential of selenium modulation of squaraine for precise cancer diagnosis and treatment through synergistic photothermal and photodynamic effects.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yanxiang Liu,Yuanlin Li,Aijun Li,Yu Gao,Xiao-Feng Wang,Ritsuko Fujii,Shin-ichi Sasaki
MXenes, a new family of 2D nanostructured materials , have been widely studied in the field of artificial photosynthesis due to their outstanding physicochemical properties. In this work, a series of 2,4-bis[4-( N , N -dibutylamino)phenyl] squaraine ( SQ ) derivatives with different number of hydroxyl groups were hybridized with Ti 3 C 2 T x MXene nanosheets , and the organic–inorganic hybrid photocatalysts were applied for water-splitting hydrogen evolution . The mass ratios of SQ @Ti 3 C 2 T x were optimized to 4 wt% for each SQ , and the best hydrogen evolution reaction (HER) rate of 28.6 μmol h −1 g −1 was achieved by SQ-3 with four OH groups. The photocatalytic ability of the hybrid comes from the outstanding light harvesting of SQ dye, sufficient active sites of Ti 3 C 2 T x , and efficient separation and transfer of the photogenerated charges via heterojunction between SQ aggregates and Ti 3 C 2 T x . This work firstly demonstrates an example of SQ sensitizer combined with MXene for hydrogen generation, which provides a new insight to further explore the MXene-based hybrid nanomaterials for water splitting hydrogen evolution.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2019
·
IF 4.018
Guimei Wang,Xiaoxue Jiang,Nanyan Fu
Adenosine 5′-triphosphate (ATP), as a “molecular currency” for intracellular energy transfer, not only participates in various physiological activities, but also involves in various pathological processes of living cells. Therefore, the establishment of a simple, rapid, sensitive and accurate ATP analysis method is of great significance for the study of its physiological functions. In this work, we rationally design a near-infrared phenylboronic acid group-functionalized dicyanovinyl squaraine ( SQ-PBA3 ), with which a supramolecular assembly was constructed for fluorescent imaging of ATP. In PBS buffer, SQ-PBA3 changes self-assembly when adding cetyltrimethyl ammonium bromide (CTAB) deriving fluorescence response of SQ-PBA3 to ATP with the maximum emission at 700 nm, due to the specificity of phenylboronic acid to diols and the multiple electrostatic interactions between SQ-PBA3 , ATP and CTAB molecules. Meanwhile, the probe was successfully applied to monitor intracellular ATP level in MCF-7 cells with high sensitivity and selectivity.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2026
·
IF 10.4
Yina Yang,Wenxuan Zhu,Huijun Liu,Jiaying Wang,Xin Jia,Yuchun Tao,Jing Meng,Qingyu Meng,Jing Dai,Lijia Yu,Chunguang Ding
Paraquat (PQ), a highly toxic and persistent herbicide, poses severe risks to environmental and public health. Herein, we developed a supramolecular indicator displacement assay (IDA) for PQ detection using a squaraine dye (J3-Ad) and cucurbit[7]uril (CB7). PQ displaces J3-Ad monomers from the J3-Ad&CB7 (J3&CB) complex, inducing J3-Ad self-assembly into H-aggregates. This process was characterized by Ultraviolet–visible (UV–vis) absorption and fluorescence spectroscopy, proton nuclear magnetic resonance ( 1 H NMR) spectroscopy, and density functional theory (DFT) calculations. The assay achieved a detection limit of 1.86 μM with a linear range of 0–30 μM, and exhibited excellent anti-interference ability. It was successfully applied to visually detect PQ in soil and fruit samples, with recovery rates of 96.21–104.66%. This method provides a simple, rapid, and reliable approach for monitoring PQ residues in environmental and food safety applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Xiaojie Zhang,Jinchen Zhao,Yan Zhao,Zhumabay Bakenov,Yongguang Zhang
The lithium sulfur (Li-S) battery holds great promise in next-generation energy storage technologies. However, the lithium polysulfide (LiPS) shuttle and slow reaction kinetics still limit its commercial development. Here, a squaraine-based porous organic framework (POF) with sulfophilic and lithiophilic moieties was developed as the separator modifications for the first time. The POF coating layer on the common separator builds a strong barrier against the LiPS shuttling, resulting in a robust inhibition on the shuttle effect as well as boosted sulfur reaction kinetics. Therefore, the POF-PP separator demonstrates stable cycling performance with a low capacity attenuation rate of 0.04% over 500 cycles and high areal discharge capacity of 4.67 mAh cm −2 with a sulfur loading of 5 mg cm −2 , which show high potential for high loading and practical Li-S battery.
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Jia Tu,Liangliang Xiao,Yingfang Jiang,Qingyuan He,Shiguo Sun,Yongqian Xu
Paraquat (PQ) is one of an effective herbicides but it has extremely toxic effects on animals and humans. It is of great importance to selectively detect PQ with fluorescence response. The first “off–on” fluorescent method based on mechanism of surfactant-controlled aggregate–deaggregate of squaraines (SQ) for paraquat (PQ) recognition in near infrared region was constructed. In this approach, remote-controlled regulation endows unique advantages to fulfill the turn-on response to electron-deficient featured PQ which prefers to quench all reported fluorophores through electron transfer. The assembled system can selectively recognize PQ over other herbicides. The detection limit was calculated to be 95.7 μg L −1 (3.72 × 10 −7 M), which is lower than that of value (200 μg L −1 ) recommended by the US Environmental Protection Agency (EPA). In addition, the system can be used for PQ detection in real sample.
✓ 已验证
产品关联
DOI
高影响因子
Small Methods
·
2024
·
IF 10.7
Li Chen,Cuiyun Zhou,Feng Jiang,Li Zhang,Chuanlai Xu
Phenylpyrazoles are widely used pesticides in the food industry. It is highly desirable to develop efficient pre-treatment and analysis methods to extract and detect phenylpyrazoles in complex food matrices. Herein, the study reports novel squaraine-linked zwitterionic core-shell magnetic covalent organic frameworks (MCOFs), which are found to be excellent pretreatment materials for the detection of trace phenylpyrazoles in samples. By coupling MCOFs to magnetic solid-phase extraction (MSPE) with Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry (UPLC-MS/MS) analysis, the detection of phenylpyrazoles (fipronil, fipronil sulfone, fipronil sulfide, fipronil de-sulfoxide, fipronil desulfinyl, ethiprole, and flufiprole) is achieved and shows good linearity at concentrations of 1–800 µg L −1 (R 2 ≥ 0.9930). The limit of detection (LOD), limit of quantification (LOQ), and recovery rates are 0.01–0.50 µg kg −1 , 0.04-1.72 µg kg −1 , and 70.96–115.32%, respectively. More importantly, this method is successfully applied to determine the phenylpyrazoles in commercial egg, poultry, milk, jujube, cabbage, tea, and rice with a detection rate of ≈0.04%. Therefore, the developed method may contribute to a new strategy for the purification and multi-target extraction of complex food matrices.
研究领域:
分析化学
·
食品安全
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2023
·Vol. 15
·期 31
·12961-12971
·
IF 6.7
Shuo Wang,Mengke Li,Gaojie Yan,Zhipeng Yang,Yuchao Guo,Xi Sun,Yue Wang,Yi Feng,Huili Ding,Xiaojie Zhang
Lithium–sulfur (Li–S) batteries are severely restricted for practical application due to the polysulfide shuttle effect, Li dendrites and thermal runaway. The use of PEO-based polymer composite electrolytes (PCEs) as an alternative strategy suffers from limited lithium-ion conductivity with deficient long-range transfer route. Herein, Li6.4La3Zr1.4Ta0.6O12 (LLZTO) nanoparticles modified with an in situ-synthesized zwitterionic covalent organic framework layer (denoted as LLZTO@HUT4) were introduced into PEO-based PCEs. Zwitterionic HUT4 modified the lithiophobic LiOH/Li2CO3 layer on the surface of LLZTO nanoparticles, which could notably promote Li+ ion transport for superior electrochemical performance of PCEs. Additionally, the intermediate layer HUT4 located between LLZTO and PEO could further improve the mechanical properties of electrolytes due to the enhanced inorganic/organic interface compatibility and intermolecular interaction. As a result, the obtained LLZTO@HUT4-15%/PEO electrolyte exhibited a competent ionic conductivity of 0.73 mS cm−1 with a Li+ transference number of up to 0.74 at 60 °C. The assembled S@CNT|LLZTO@HUT4-15%/PEO|Li coin cell delivered a considerable initial discharge capacity of 1018 mA h g−1 at 0.2 C, with approximately 92.1% capacity retention after 100 cycles, elucidating an obviously suppressed shuttle effect.
✓ 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）