Nature Photonics
·
2024
·Vol. 18
·期 11
·1185-1194
·
IF 32.3
Xu Qingyang,Zhang Jianyu,Sun Jing Zhi,Zhang Haoke,Tang Ben Zhong
Manipulating the electronic structure of organic functional materials by through-space conjugation (TSC) to achieve desirable photophysical properties has been a long-standing research focus. Although the working mechanisms of TSC have been demonstrated, the roles that the intrinsic molecular skeleton and extrinsic aggregates play remain unclear. Here four trinaphthylmethanol isomers and four trinaphthylmethane (TNM) isomers with varying connecting sites of naphthalene were synthesized, and their photophysical properties were systematically investigated. The strength of TSC was found to rise from 222-TNM to 111-TNM with the increased number of 1-naphthalene units. In particular, 111-TNM was found to support efficient long-wavelength clusteroluminescence with an absolute quantum yield of 55%. Experimental and theoretical results revealed that the inherent attribute of robust intramolecular interactions within individual molecules is fundamental for ultrastrong TSC, and intermolecular interactions play an auxiliary role in fortifying and stabilizing intramolecular interactions. This work reveals the intrinsic and extrinsic factors for manipulating TSC and provides a reliable strategy for constructing non-conjugated luminogens with efficient clusteroluminescence.
研究领域:
有机化学
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材料科学
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光化学
✓ 已验证
DOI
高影响因子
Water
·
2023
·Vol. 15
·期 14
·2615
·
IF 3.4
Lidan Wei,Wenbin Zhang
Pharmaceutical contamination has emerged as a significant environmental concern; yet, the impact and underlying mechanisms of widely detected naproxen (NPX) on wastewater biological treatment remain poorly understood. To address this knowledge gap, this study investigates the influence of NPX on biological nutrient removal in wastewater treatment under mesophilic conditions, and elucidates the associated mechanisms. The results demonstrate that NPX concentrations below 0.05 mg/L have no significant effect on the removal of pollutants and nutrients in wastewater, whereas the concentrations exceeding 0.5 mg/L hinder the removal of both chemical oxygen demand (COD) and nutrients, with a more pronounced inhibitory effect observed at higher NPX doses. When the concentration of NPX was 2.0 mg/L, the removal efficiency of COD, NH4+-N and phosphate decreased to 81.2~83.6%, 82.5~84.2% and 80.2~82.6%, respectively, which was much lower than that of the blank. Furthermore, NPX leads to a decrease in activated sludge concentration and organic matter content within the sludge. Additionally, NPX promotes the secretion of extracellular polymeric substances (EPS). Periodic investigations reveal that NPX inhibits the biosynthesis of intracellular polymer polyhydroxyalkanoate (PHA), thereby reducing energy production during later stages of degradation. Enzyme activity analysis indicates that high NPX concentrations suppress the activity of key enzymes associated with biological nitrogen and phosphorus removal. These findings provide theoretical insights for the treatment of NPX-containing wastewater using activated sludge processes.Keywords:activated sludge;biological nutrient removal;naproxen;extracellular polymeric substances
研究领域:
环境科学
·
污水处理
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DOI
高影响因子
Science China-Chemistry
·
2015
·Vol. 59
·期 1
·114-121
·
IF 1.695
Zhao Wenping,Jin Yu,Zhang Wen
Two phase transition compounds, diethylammonium 1,5-naphthalenedisulfonate (1) and cyclohexylammonium 1,5-naphthalenedisulfonate (2), were screened from a series of organic salts based on 1,5-naphthalenedisulfonate. The phase transition behaviors were studied by differential scanning calorimetry, single-crystal X-ray analysis and dielectric measurements. Compounds 1 and 2 undergo phase transitions at about 202 and 148 K, respectively, accompanied by distinct dielectric changes. The origin of the phase transitions was ascribed to motional changes of the cations in the crystal lattices.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2021
·
IF 3.196
Ting-Hong Huang,Cheng Luo,Dan Zheng,Jing-Yang Tan,Yong Liu,Jing Tang
Based on α- and β-naphthylamine, two new diphosphines, N,N-bis((diphenylphos phino)methyl)naphthalen-1-amine ( 1 ) and N,N-bis((diphenylphosphino)methyl)naphthalene -2-amine ( 2 ), have been prepared and characterized by IR, 1 H NMR, 31 P NMR, TG, UV-Vis, XRD and X-ray crystal structure analysis. Structural analysis shows that the two Ph 2 PCH 2 - groups in 1 and 2 are disposed in an anti configuration, and the change of the position of the (Ph 2 PCH 2 ) 2 N-group on the naphthalene moiety results in different spatial configurations of the two Ph 2 P- groups and different weak interactions, such as C-H … π and π–π interactions. DFT studies show that the composition of the HOMOs for 1 and 2 are almost the same (the naphthyl group with admixed N and P atoms), but the ingredients of the LUMOs for 1 are different from that for 2, coinciding with the change of Mülliken atomic charges . Moreover, the emission spectra show that the emissions of complexes 1 and 2 in acetonitrile solution are not similar to those of solid-state samples.
研究领域:
有机化学
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计算化学
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材料科学
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Yibin Zhang,Xianyu Qiu,Boling Wang,Xiaoling Liu,Yueting Cheng,Xiaoqian Rong,Yanhong Kuang,Lin Sun,Jun Liu,Rudy L. Luck,Haiying Liu
A fluorescent probe was developed for the detection of phosgene based on 1,8-naphthalimide, of which o-diaminobenzene was used as the recognition moiety. The probe does not fluoresce due to nonradiative decay. The probe reacts rapidly with phosgene via an intramolecular cyclization reaction, which induces large fluorescence due to increased rigidity in the resulting molecule and a low detection limit (0.23 nM). This probe has excellent selectivity for phosgene against competing interference analytes and, in the form of probe-loaded test paper, is an extremely sensitive method for phosgene sensing in the gas phase below 1 ppm concentrations.
研究领域:
化学
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分析化学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
ChemCatChem
·
2022
·Vol. 14
·期 12
·e202200274
·
IF 5.497
Na Ji,Shuai Cheng,Zhichao Jia,Hanyang Li,Poknam Ri,Shurong Wang,Xinyong Diao
Graphical Working together : The establishment of Co 0 -Al 2 O 3 @USY interface via in-situ growth of CoAl-LDH on USY surface rendered the high activity in HDO of lignin to naphthenes which were attributed to the synergetic effect between Co 0 sites and USY, in which Co 0 sites were responsible for hydrogenation and acid sites on USY were responsible for deoxygenation. To enhance the catalytic activity and stability of metal catalysts in the hydrodeoxygenation of lignin derivatives into naphthenes, a bifunctional Co−Al 2 O 3 @USY catalyst was fabricated by the reduction of CoAl layered double hydroxide in-situ grown on the USY zeolite. In the hydrodeoxygenation of guaiacol, a 100.0 % conversion with cyclohexane yield up to 93.6 % was achieved at 180 °C, 3 MPa for 4 h, which should be the hitherto lowest reaction temperature that has been reported over Co-based metal catalysts. This catalyst was also relatively stable with 5 runs and exhibited excellent catalytic performance in the hydrodeoxygenation of other lignin model compounds and even real lignin feedstock into naphthenes. The high-efficiency of Co−Al 2 O 3 @USY was attributed to the synergistic effect between well-dispersed small Co nanoparticles and abundant acidic sites on the USY surface, while the outstanding stability was attributed to the anchoring effect of Al 2 O 3 matrix to Co nanoparticles which avoided the leaching of Co species and particle agglomeration. This work provides a potential strategy for the design of an efficient and stable catalyst for lignin utilization.
研究领域:
催化化学
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能源化学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2018
·
IF 2.891
Lulu Tong,Ying Qian
A naphthalimide-rhodamine fluorescent turn-on probe RHSNO with red emission for hypochlorous acid based on dual reaction linkage induce through-bond energy transfer (TBET) system was designed and synthesized. Rhodamine B thiohydrazide and naphthalimide -N,N- dimethylthiocarbamate (DMTC) were linked to form a structure of monothio-bishydrazide. In addition, introduce dimethylthiocarbamoyl chloride as another reaction site of ClO − , and it acts to quench the fluorescence of naphthalimide. In the presence of ClO − , RHSNO exhibits high selectivity toward ClO − at trace levels over other anions/ROS based on ClO − -triggered intramolecular desulfurization cyclization of rhodamine-thiohydrazide, the spiro ring of rhodamine was opened and meanwhile desulfurization hydrogenation happened at DMTC of naphthalimide moiety. These dual linkage reaction happened simultaneously made a typical TBET process took place from naphthalimide donor to rhodamine acceptor, an obvious increase of rhodamine emission at 590 nm and enhanced up to 260-fold gradually after adding ClO − with the increase of the concentrations. The efficiency of energy transfer was calculated to be 86%. And the quantum yield of rhodamine moiety is 0.64. Besides, the chemodosimeter RHSNO for ClO − with high sensitivity, a dramatic color change from colorless to brightly pink among 2 s after the addtion of ClO − . The detection limit was determined to be 22.1 nM and works excellently within a wide pH range of 5–10. Moreover, RHSNO had been employed for endogenous imaging in MCF-7 cell for ClO − . The results indicated that the probe could permeated into the cells and reacted with the intracellular ClO − . It is excellent to design fluorescence sensor RHSNO as a quick and effective method for detecting excess ClO − in living cell, for maintaining the balance of hypochlorite in the body and ensure normal life activities.
研究领域:
生物化学
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医学检测
·
荧光分析
✓ 已验证
DOI
高影响因子
Small
·
2025
·
IF 12.1
Yifan Chen,Derui Kong,Lianfen Chen,Peter VanNatta,Hang Li,Jiaao Cheng,Chengzhi Ma,Pinghuai Liu,Yujie Song,Shanshuai Chen,Cheng-Xia Chen,Thamraa AlShahrani,Shengqian Ma
Conversion of solar energy to clean energy via naphthalenetetracarboxylic dianhydride (ND)-based organic semiconductors represents a topic of research. Nonetheless, efforts in this area are challenging due to the rapid recombination of photogenerated electron-hole (e-h) pairs arising from over-accumulation. Herein, various n -type hybrid photocatalysts, ND-TiO 2 (x:y) (x and y represent the ratios of ND and TiO 2 , respectively), featuring excellent visible-light responsiveness, fast separation and migration ability of charge carriers, and permanent porosity, are constructed via a sol–gel self-assembly approach. The rational assembly of ND with TiO 2 not only effectively inhibits the problematic overgrowth of ND but also enables the composites with excellent visible-light responsiveness, and facilitates the separation and migration of charge carriers, thus resulting in greatly improved photocatalytic H 2 evolution performance. The optimized composite ND-TiO 2 (1:10) with 0.38 wt% Pt nanoparticle loading presents a maximum hydrogen-evolution rate of 3.23 mmol·g −1 ·h −1 , with extraordinary TON (2446) and TOF (163.1 h −1 ), which are much higher than ND (0.031 mmol·g −1 ·h −1 ) and TiO 2 -Colloid (0.027 mmol·g −1 ·h −1 ) counterparts. In addition, the underlying photocatalytic mechanism is well established through comprehensive experiments and computational studies.
研究领域:
材料科学
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能源化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
REDOX REPORT
·
2024
·
IF 5.2
Xiaowan Chen,Yan Ma,Ziming Yang,Dingjie Shen,Xia Li,Maowei Ni,Xiaoling Xu,Wei Chen
Glutathione reductase (GR), one of the most important antioxidant enzymes in maintaining intracellular redox homeostasis, has become a novel target to suppress cancer cell growth and metastasis. In this work, we evaluated a series of naphthoquinones (NQs) as potential GR inhibitors and elucidated the mechanism of inhibition. NQ-6, one of the most potent compounds among this series, inhibited GR in vitro and in vivo and was identified as a competitive and irreversible inhibitor. The Ki and kinact values of NQ-6 were determined to be 17.30 ± 3.63 μM and 0.0136 ± 0.0005 min-1, respectively. The tandem mass spectrometric analysis revealed that the two substrate binding sites Cys61 and Cys66 of yeast GR were modified simultaneously through arylation or only Cys66 was covalently modified by NQ-6. Intracellular reactive oxygen species, collapsing of mitochondrial membrane potential and protein S-glutathionylation elevation were induced by NQ-6. NQs can be valuable compounds in GR inhibition and oxidative stress-related research.
研究领域:
药理学
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生物化学
·
肿瘤学
✓ 已验证
DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 19
·4535
·
IF 4.2
Yingtan Yu,Mengdi Liu,Shimeng Wang,Chaoxing Zhang,Xue Zhang,Li Liu,Shuang Xue
Polychlorinated naphthalenes (PCNs) are a new type of persistent organic pollutant (POP) characterized by persistence, bioaccumulation, dioxin-like toxicity, and long-range atmospheric transport. Focusing on one type of PCN, monochlorinated naphthalenes (CN-1, CN-2), this study aimed to examine their photodegradation in the environment. In this work, CN-1 and CN-2 were employed as the model pollutants to investigate their photodegradation process under UV-C irradiation. Factors like the pH, initial concentrations of CN-1, and inorganic anions were investigated. Next, the roles of hydroxyl radicals ( • OH), superoxide anion radicals (O 2 •− ), and singlet oxygen ( 1 O 2 ) in the photodegradation process were discussed and proposed via theory computation. The results show that the photodegradation of CN-1 and CN-2 follows pseudo-first-order kinetics. Acidic conditions promote the photodegradation of CN-1, while the effects of pH on the photodegradation of CN-2 are not remarkable. Cl − , NO 3 − , and SO 3 2− accelerate the photodegradation of CN-1, whereas the effect of SO 4 2− and CO 3 2− is not significant. Additionally, the contributions of • OH and O 2 •− to the photodegradation of CN-1 are 20.47% and 38.80%, while, for CN-2, the contribution is 16.40% and 16.80%, respectively. Moreover, the contribution of 1 O 2 is 15.7%. Based on DFT calculations, C4 and C6 of the CN-1 benzene ring are prioritized attack sites for • OH, while C2 and C9 of CN-2 are prioritized attack sites.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Metals
·
2024
·Vol. 14
·期 1
·87
·
IF 2.6
Yuantao Yang,Junli Wang,Xuanbing Wang,Jinlong Wei,Xiaoning Tong,Ruidong Xu,Linjing Yang
The electrolytic refining of crude tin is generally carried out in the fluorosilicic acid (H2SiF6) system with the assistance of bone glue and β-naphthol. However, the high saturated vapor pressure and low stability of H2SiF6present environmental concerns and do not align with sustainable development goals. In this paper, the electrochemical behavior of tin on a glassy carbon (GC) electrode was studied in a relatively green and environmentally friendly methanesulfonic acid (MSA) system. Bone glue, sodium lignosulfonate, and β-naphthol were used as additives to make the deposit morphology smooth and to ensure grain refinement. The electrochemical reduction process of Sn2+in an MSA system is a quasi-reversible process controlled by diffusion. The apparent activation energyEa= 14.189 kJ/mol for the ion diffusion of Sn2+was further calculated. The results of chronoamperometry showed that the electrocrystallization of Sn2+on the GC electrode gradually tended to three-dimensional instantaneous nucleation with the increase in applied potential. The morphology and phase of the deposits were analyzed using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results showed that the deposits were uniform and dense pure tin. This work elucidates the electrochemical behavior of tin in a methanesulfonic acid system.
研究领域:
电化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nature Sustainability
·
2024
·
IF 25.7
Zhao Ziming,Li Tianyu,Zhang Changkun,Zhang Mengqi,Li Shenghai,Li Xianfeng
The growing global capacity for renewable energy generation necessitates the deployment of energy storage technologies with a combination of low cost, good performance and scalability. With these advantages, aqueous organic flow batteries have the potential to be the system of choice because they could store energy from organic redox-active molecules. Here we report naphthalene derivatives as organic redox-active molecules that exhibit high solubility (~1.5 M) and a stable redox-active framework with no obvious capacity decay over 40 days (50 Ah l −1 ) in an air atmosphere in flow batteries. We report a battery that runs smoothly even under continuous airflow without obvious capacity decay for ~22 days (more than 600 cycles). A series of spectral analyses and theoretical calculations reveal that the dimethylamine scaffolds improve the water solubility and protect the active centre, ensuring the stability of the molecules during the charge and discharge process. Owing to the success in kilogramme-scale molecular synthesis, pilot-scale stack expansion with notable cycling stability over 270 cycles (~27 days) is attained. The cost benefit evidenced by technoeconomic analysis together with the stability even under open-air conditions indicates the practical value of the present molecular system in grid-scale energy storage.
研究领域:
能源化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）