SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2026
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IF 4.8
Zhima Yangcuo,Xiaodan Zheng,Yajuan Zhang,Xin Yang,Xinyi Zheng,Hang Zhu,Wenhui Chen,Qihong Cai
Under alkaline conditions with sodium hydroxide (NaOH), both 1-naphthol (1-NAP) and 2-naphthol (2-NAP) transitioned from their molecular forms to ionic forms, resulting in redshifts of their fluorescence spectra. Thus, not only the interference of 2-NAP raman peak was eliminated, but the fluorescence intensity of two naphthols was also enhanced, thereby improving the selectivity and sensitivity of their analysis. Due to their structural similarity, the conventional fluorescence spectra of 1-NAP and 2-NAP overlapped and interfered with each other, precluding their simultaneous measurement without prior separation. In this study, the wavelength difference (Δλ) = 140 nm was selected for synchronous fluorescence spectrometry (SFS) scanning to simplify the spectra. However, the interference of 2-NAP on 1-NAP remained significant. So, the second-order derivative technique combined with SFS was adopted. The method that eliminated the severe interference between 1-NAP and 2-NAP and wastewater background by utilizing spectral parameters. Finally, a new second-order derivative SFS for simultaneous determination of 1-NAP and 2-NAP was first established. The detection limits were 0.0850 ng·mL −1 for 1-NAP and 0.1066 ng·mL −1 for 2-NAP, with linear ranges of 0.5–80 ng·mL −1 and 0.5–50 ng·mL −1 , respectively. Recoveries of two naphthols in wastewater were 87.53%–93.50% (1-NAP) and 89.85%–104.00% (2-NAP). The new SFS established in this research has been successfully applied to the analysis and detection of 1-NAP and 2-NAP residues in wastewater, achieving satisfactory results. It is expected to become a new routine detection method for 1-NAP and 2-NAP.
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Journal of Bioresources and Bioproducts
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2026
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IF 13
Huali Zeng,Linlin Liang,Liuli Zhu,Xianting Zeng,Yanling Bin,Renman Wu,Baojie Liu,Chengrong Qin,Shuangfei Wang,Shuangquan Yao
Hydroxyl functionalized additives (Ga-OHs) that can inhibit lignin re-polymerization have demonstrated significant potential in biomass resource conversion and utilization. However, the molecular mechanisms underlying this inhibitory effect remain poorly understood. This study systematically compares the lignin condensation inhibition capabilities of four hydroxyl functionalized additives with distinct functional group effects: salicylic acid, mannitol, 2-naphthol, and glycolic acid. Results indicate that lignin condensation inhibition is primarily associated with hydrogen bonding interactions formed between hydroxyl functionalized additives and oxygen containing functionalities on lignin side chains, while van der Waals interactions contribute as non-specific stabilizing contacts at the early stages. Rapid electron flow in short-chain compounds molecules stabilized the lignin structure. The strong hydrogen bond interaction between mannitol and oxygen groups in lignin branches (–80.38 kJ/mol) enhanced the stability of a separated lignin in a strong acidic environment, which resulted in a high β -O-4 content (up to 47.12 per 100 aromatic units). Here, we comparatively screened hydroxyl functionalized additives with different structures under dilute acid pretreatment and linked the quantitative outcomes of lignin condensation inhibition to density functional theory (DFT) validated noncovalent interactions. This work provides insight into the separation of low condensation lignin and informs the screening of additives with lignin condensation inhibition potential.
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JOURNAL OF HAZARDOUS MATERIALS
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2026
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IF 10.6
Ruomu Chen,Yumeng Niu,Nan Li,Jingrui Peng,Ziqian Xia,Chenyang Wang,Jiandong Jiang,Kai Chen
Nitro-polycyclic aromatic hydrocarbons (nitro-PAHs) are toxic and persistent environmental contaminants of increasing concern because of their widespread occurrence and ecological risks. Nitronaphthalene, a representative nitro-PAH, occurs as positional isomers, yet microbial degradation studies have mainly focused on 1-nitronaphthalene (1-NN), leaving the basis for biodegradation of 2-nitronaphthalene (2-NN) largely unresolved. In this study, Burkholderia pseudomultivorans M3 was isolated from river sediment in Anhui Province, China, and was found to efficiently degrade both 1-NN and 2-NN, indicating an expanded degradation range for nitronaphthalene isomers. Genome analysis identified a novel nitronaphthalene degradation gene cluster ( nnd ) that is phylogenetically related to reported nin - and nag -type gene clusters but differs functionally from both. Gene knockout and complementation experiments demonstrated that nndAc , encoding the catalytic α-subunit of a Rieske-type dioxygenase, is essential for degradation of both isomers. Heterologous expression and metabolite identification further showed that the NndAB system transforms 1-NN and 2-NN into 1,2-dihydroxynaphthalene via the corresponding nitro-dihydrodiol intermediates, with concomitant nitrite release. Site-directed mutagenesis revealed that the ability of NndAc depends on the coordinated effects of multiple active-site residues, with F200 being particularly important for 2-NN transformation. Moreover, strain M3 maintained substantial removal efficiency in synthetic wastewater containing mixed nitro-, carboxyl-, and hydroxyl-substituted naphthalene compounds, supporting its applicability in complex contaminated matrices. These findings reveal the molecular basis underlying the broadened substrate range of nitronaphthalene degradation and highlight the potential of strain M3 for remediation of wastewater containing mixed substituted naphthalene pollutants.
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BIOMASS & BIOENERGY
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2026
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IF 7
Jinlei Guo,Sheng Su,Song Guo,Xiaoyang Zhang,Juan Wang
This work examines how phosphoric acid–hydrogen peroxide (PHP) pretreatment influences the pyrolysis behavior of pine biomass and the characteristics of the resulting products. The results indicate substantial removal of hemicellulose and lignin from the biomass following PHP pretreatment, resulting in a looser biomass structure, decreased surface oxygen-containing functionalities, and a reduced apparent activation energy during pyrolysis. After pretreatment, the bio-oil yield increases from 15.16% to over 30%, and the bio-oil yield of the sample pretreated with a concentrated phosphoric acid–hydrogen peroxide mixture at a concentration ratio of 50.0–10.0 wt% reaches 34.64%. Meanwhile, acid and carbonyl contents are substantially decreased, while phenolic species become more prevalent, reflecting a pronounced enhancement in fuel quality. In situ FTIR analysis reveals that PHP pretreatment accelerates the cleavage and transformation of hydroxyl and carbonyl groups, promoting the formation of oxygenated intermediates. Regarding biochar, PHP pretreatment enhances the specific surface area and microporous structure, enriches active functional groups, including hydroxyl, carboxyl, and thus increases the adsorption capacity for 2-naphthol by 18.66 times.
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JOURNAL OF POLYMER RESEARCH
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2022
·Vol. 30
·期 1
·1-8
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IF 3.061
Qu Shuzhang,Li Haokun,Song Jianhui,Wang Wei
A series of half-metallocenes of the type Cp’TiCl 2 (L) [Cp’ = Cp, L = naphthalen-1-yloxy ( 1a ), (2,4-dichloronaphthalen-1-yl)oxy ( 1b ), naphthalen-2-yloxy ( 1c ); Cp’ = C 5 Me 5 (Cp*), L = naphthalen-1-yloxy ( 2a )] are synthesized and well characterized. Using these complexes as catalysts for the polymerization of styrene in the presence of methylaluminoxane (MAO) cocatalyst, highly syndiotactic polystyrene can be obtained. The effects of anionic ligands, cyclopentadienyl, and polymerization conditions, such as Al/Ti molar ratio and polymerization temperature, on both the catalytic activity and the molecular weights of the resulted polymer are discussed. Higher polymerization temperature gives higher activity, but the obtained polymer has lower molecular weight. The higher Al/Ti ratio gives higher activity, while the molecular weight of the polymer increases with the increase of MAO amount in a certain range. This may indicate that the transfer to aluminum is not the main chain transfer mode of this polymerization. The activity of Cp* catalyst is higher than that of Cp catalyst, which indicates that the substituted methyls provides the stability of active center. Moreover, the molecular weight of the polymer obtained by the former is significantly higher than that of the latter, which indicates that the chain transfer reaction is inhibited by methyls on Cp ligand. Naphthyloxy ligands with different structures have no significant difference in polymerization activity and molecular weight of polymers.
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Nanomaterials
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2022
·Vol. 12
·期 20
·3636
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IF 5.719
Jianchao Gong,Tingting Wang,Wei Zhang,Lin Han,Mingxiao Gao,Tianen Chen,Tao Shen,Yaxiong Ji
To explore the effect of spacer structure on the adsorption capability of organo-vermiculites (organo-Vts), a series of aza-containing gemini surfactants (5N, 7N and 8N) are applied to modify Na-vermiculite (Na-Vt). Large interlayer spacing, strong binding strength and high modifier availability are observed in organo-Vts, which endow them with superiority for the adsorption of 2-naphthol (2-NP) and bromophenol blue (BPB). The maximum adsorption capacities of 5N-Vt, 7N-Vt and 8N-Vt toward 2-NP/BPB are 142.08/364.49, 156.61/372.65 and 146.50/287.90 mg/g, respectively, with the adsorption processes well fit by the PSO model and Freundlich isotherm. The quicker adsorption equilibrium of 2-NP than BPB is due to the easier diffusion of smaller 2-NP molecules into the interlayer space of organo-Vts. Moreover, stable regeneration of 7N-Vt is verified, with feasibility in the binary-component system that is demonstrated. A combination of theoretical simulation and characterization is conducted to reveal the adsorption mechanism; the adsorption processes are mainly through partition processes, electrostatic interaction and functional interactions, in which the spacer structure affects the interlayer environment and adsorptive site distribution, whereas the adsorbate structure plays a role in the diffusion process and secondary intermolecular interactions. The results of this study demonstrate the versatile applicability of aza-based organo-Vts targeted at the removal of phenols and dyes as well as provide theoretical guidance for the structural optimization and mechanistic exploration of organo-Vt adsorbents.Keywords:organo-vermiculite;aza-containing gemini surfactant;2-Naphthol;bromophenol blue;adsorption
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ACS Applied Materials & Interfaces
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2021
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IF 9.229
Xin-Qiao He,Yuan-Yuan Cui,Cheng-Xiong Yang
The lack of functional groups or binding sites largely hindered the broad application of microporous organic networks (MONs). Herein, we report the fabrication of the sulfonate group-enriched magnetic MON composite (MMON-SO3H@SO3Na) via the combination of the sulfonic acid group containing the monomer and thiol–yne click postmodification for efficient magnetic solid-phase extraction (MSPE) of benzimidazole fungicides (BZDs) from complex sample matrices. The well-defined core–shell-structured MMON-SO3H@SO3Na was obtained and served as an advanced adsorbent for MSPE for concentrating and monitoring trace BZDs. The MMON-SO3H@SO3Na with numerous sulfonate groups provides plenty of ion-exchange, hydrogen-bonding, and π–π sites, leading to the favorable affinity to BZDs via multiple interaction mechanisms. The MMON-SO3H@SO3Na-based MSPE–high-performance liquid chromatography method afforded a wide linear range, low limits of detection, large enrichment factors, good precisions, and reusability for BZDs. Trace BZDs in complex vegetables and fruit samples were successfully detected by the established method. The MMON-SO3H@SO3Na also exhibited good selectivity toward multiple types of polar contaminants containing hydrogen-bonding sites and aromatic structures. This work provided a new postsynthesis strategy for constructing novel and multifunctioned magnetic MONs for preconcentration of trace analytes in a complex matrix.
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ANALYTICAL CHEMISTRY
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2021
·
IF 6.986
Shiqi Huang,Limin Zhang,Liyi Dai,Yuanyuan Wang,Yang Tian
There is still an urgent need to develop reliable analytical methods of O2•– in vivo for deeply elucidating the roles of O2•– playing in the brain. Herein, a nonenzymatic electrochemical sensor with ratiometric signal output was developed for an in vivo analysis of O2•– in the rat brain. Diphenylphosphonate-2-naphthol ester (ND) was designed and synthesized as a specific recognition molecule for the selective determination of O2•–. An anodic peak ascribed to the oxidation of 2-naphthol was generated via the nucleophilic substitution between ND and O2•– and was increased with the increasing concentration of O2•–. Meanwhile, the inner reference of methylene blue (MB) was co-assembled at the electrode surface to enhance the determination accuracy of O2•–. The anodic peak current ratio between 2-naphthol and MB exhibited a good linear relationship with the concentration of O2•– from 2 to 200 μM. Because of the stable molecule character of ND and its specific reaction with O2•–, the developed electrochemical sensor demonstrated excellent selectivity toward various potential interferences in the brain and good stability even after storage for 7 days. Accordingly, the present electrochemical sensor with high selectivity, high stability, and high accuracy was successfully exploited in monitoring the levels of O2•– in the rat brain and that of the diabetic model followed by cerebral ischemia.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
·
IF 8.128
Ying Liu,Runxia Wang,Haiyan Wang,Xijuan Yu,Xien Liu,Peng He,Xilin She,Tianrong Zhan
It is established that ultrathin layered double hydroxide nanosheets (LDHNS) and zeolitic imidazole frameworks (ZIF) are desirable electrochemical sensing modifiers owing to their large surface area and abundant catalytic sites. Integration of them is thus an effective solution to maximize their electrocatalytic activity . Herein, a novel reaction–diffusion framework (RDF) technique is applied for the in situ growth of ZIF-67 on ultrathin CoAl-LDHNS (CoAl-LDHNS@ZIF-67). In a confined space of the agar gel matrix of RDF, the coordination reaction between organic ligands and CoAl-LDHNS without an additional Co 2+ source achieves the controllable growth of ZIF-67 crystals through a long vertical diffusion . The prepared composite comprises both CoAl-LDHNS and ZIF-67 components with a certain ratio and provides a large surface area and amply catalytic sites, thus realizing a rapid transfer of electron and mass. The CoAl-LDHNS@ZIF-67 modified electrode is employed for the simultaneous detection of naphthol isomers by differential pulse voltammetry . Naphthol isomers display anodic reactions with a wide peak potential difference, allowing their simultaneous detection feasible. Voltammetric responses of α-naphthol and β-naphthol follow good linearity against the concentration in a wide range from 0.3 to 150 μM with limits of detection of 54 and 82 nM, respectively. The proposed sensor also demonstrates excellent selectivity , stability, reproducibility, and practicability for the simultaneous detection of naphthol isomers.
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TALANTA
·
2021
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IF 6.057
Xin-Qiao He,Yuan-Yuan Cui,Xiao-Hui Lin,Cheng-Xiong Yang
Development of novel functionalized adsorbents for efficient magnetic solid phase extraction (MSPE) is essential for promoting their versatile applications in sample pretreatment. Herein, we report the fabrication of a new polyethyleneimine-600 decorated magnetic microporous organic network nanosphere (Fe 3 O 4 @MON-PEI 600 ) for effective MSPE of trace non-steroidal anti-inflammatory drugs (NSAIDs) from different water samples. The core-shelled Fe 3 O 4 @MON-PEI 600 integrates the synergistic effects of Fe 3 O 4 , MON and PEI 600 , providing facile and effective extraction to NSAIDs via multiple hydrogen bonding , π-π and hydrophobic interactions. The inner MON shell employs π-π and hydrophobic interaction sites and the outer PEI-600 coat acts as the hydrogen bonding doner/receptor, which affords good extraction performance for NSAIDs. Under optimal conditions, the Fe 3 O 4 @MON-PEI 600 -MSPE-HPLC-UV method gives wide linear range (0.14–400 μg L −1 ), low limits of detection (0.042–0.149 μg L −1 ), good precisions (intra-day and inter-day RSDs < 4.5%, n = 6), and large enrichment factors (97.0–98.2). Extraction mechanisms and selectivity of Fe 3 O 4 @MON-PEI 600 are evaluated in detail. Moreover, Fe 3 O 4 @MON-PEI 600 is successfully applied to enrich the trace NSAIDs in different water samples with the concentrations of 0.7 and 0.8 μg L −1 for 1-naphthylacetic acid, 0.5 and 0.1 μg L −1 for naproxen as well as 0.7 μg L −1 for ibuprofen , respectively. The developed method not only affords a novel and efficient magnetic adsorbent for NSAIDs in aqueous media at trace level, but also provides a new strategy for the rational design and synthesis of multiple functionalized MON composites in sample pretreatment.
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Journal of the Iranian Chemical Society
·
2020
·Vol. 17
·期 8
·2095-2103
·
IF 1.552
Cao Jiangping,Xie Qilong,Liang Yongfeng,Di Hongwei,Yi Zonghui,Ma Gui,Zhang Ping
Abstract A rapid and simultaneous method for the determination of naphthol isomers in human urine has been developed and validated by using molecular complex-based dispersive liquid–liquid microextraction followed by high-performance liquid chromatography. This method worked by the formation of hydrogen bond interaction between the extractant (1-octanol, Lewis base) and the analytes (naphthols, Lewis acid). Experimental parameters, including the type and volume of the extractant and disperser, pH, addition of salt, extraction time, were examined and optimized. Additionally, the proposed method was applied to human urine samples collected from six volunteer donors of the chemical laboratory. Under the optimum conditions, average recovery rates for the real samples varied from 78.5 to 98.2%, with the relative standard deviations less than 7.6%. The method offered excellent linearity over a range of 5–5000 ng/mL with correlation coefficient ( r < 0.999). The detection limit ( S / N = 3) was 0.61–0.69 ng/mL. The developed method was successfully applied to the determination of naphthol isomers in human urine. Compared with the previous DLLME methods, the feature of the new procedure lies in simpler sample preparation, higher sensitivity and lower cost of the extraction device. Also, theoretical calculations were conducted to understand the molecular interaction mechanism between 1-octanol and naphthols. Graphic abstract
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Huanfang Zhou,Limin Chen,Shuting Li,Songqing Huang,Yingying Sun,Yanhong Chen,Zhao Wang,Wei Liu,Xinchun Li
A facile and green method for preparation of gold/palladium (Au/Pd) bimetallic nanoparticles interleaved reduced graphene oxide (rGO) composite was presented. One-step electroreduction of Au/Pd precursors and graphene oxide synergistically produced a multilayered and well-structured nanohybrid on glassy carbon electrode, which was explored as a highly efficient electrocatalyst . This operation is easy and controllable, as compared with time-consuming and procedure-tedious hydrothermal synthesis . The morphology and chemical constituents were meticulously characterized. The remarkable electrocatalytic performance of the prepared nanohybrid was demonstrated by detection of a high-risk carcinogen pollutant, hydrazine. By optimizing the preparation condition and investigating the electrochemical behavior, we achieved the sensitive analysis of hydrazine with ultralow oxidation overpotential. Amperometry was employed for constructing the quantitative calibration curve ; the steady-state current originating from hydrazine oxidation was proportional to the analytical concentration ranging from 0.1 μM to 200 μM, with the detection limit of 16 nM. Moreover, the nanohybrid displayed considerable anti-interfering ability with respect to hydrazine detection, as a variety of potentially coexisting substances produced negligible electrochemical response in the given analytical condition. Advantages including easy-to-preparation, high sensitivity and favorable selectivity , as well as broad linear response make the present method feasible for monitoring of hydrazine in water environment.
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