CHINESE CHEMICAL LETTERS
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2011
·Vol. 22
·期 12
·1497-1500
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IF 0.775
Xiao Zheng Lan,Hai Rong Pei,Chuan Xian Cheng
Phase behavior of binary system of bromobenzene–chlorobenzene (C 6 H 5 Br–C 6 H 5 Cl) confined in SBA-15 and MCM-41 (pore diameter 8 nm, 3.8 nm, respectively) has been investigated by means of differential scanning calorimetry (DSC). Phase diagram of C 6 H 5 Br–C 6 H 5 Cl system confined in SBA-15 is a type of the complete miscible both in liquid and solid state, the same phase behavior as the bulk system. However, the phase diagram comprises only one boundary line, which is shifted down 22–36 K with respect to the bulk system. C 6 H 5 Br, C 6 H 5 Cl or the mixture within nanopores of MCM-41 is nonfreezing. The different phase behavior of the system confined in SBA-15 and MCM-41 is thought mainly due to the relative size of pore to molecule.
研究领域:
物理化学
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材料科学
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纳米科技
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热力学
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DYES AND PIGMENTS
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2026
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IF 3.9
Shen Wang,Wenjie Wei,Yaran Wang,Rui Ma,Yunya Wu,Yunxian Yang,Yuxin Zuo,Zhiqi Liu,Pengfei Cheng
Agricultural films have attracted considerable attention in recent years. Herein, four types of organic-inorganic complex red light conversion agents ( W-2L , W-8L , S-8L , H-8L ) were designed, the S-8L conversion agent exhibits an extremely broad ultraviolet absorption range of 200-400 nm. Contact angle (142.7°) tests confirmed its excellent hydrophobic properties, enabling better compatibility with LLDPE substrates. Meanwhile, its outstanding photothermal stability of S-8L was demonstrated by a long red fluorescence lifetime: 478.14 μs, an exceptional fluorescence quantum yield: 76.77 %, a high initial decomposition temperature and an extended ultraviolet aging resistance period. Furthermore, the S-8L1 conversion film was utilized to assist in the cultivation of Chlorella cells, demonstrating its excellent UV-blocking and red-light conversion capabilities, significantly increasing both biomass and chlorophyll content. This work proposed a potential way to develop highly efficient light conversion agents by regulating the inorganic-organic functional groups.
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Science Advances
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2026
·Vol. 12
·期 8
·
IF 13.9
Lei Yu,Shixiong Zhang,Liang Liu,Di Li,Yongli Cai,Chenxin Wu,Lei Hua,Haiyang Li,Dehui Deng,Ping Chen,Zhenfeng Xi,Jianping Guo,Junnian Wei
Directly converting dinitrogen (N 2 ) into valuable nitrogen-containing compounds remains an enduring challenge in chemical synthesis. Here, we report the direct cyanation of aromatic substrates using N 2 and methane (CH 4 ) at atmospheric pressure facilitated by a custom-built, air-free dielectric barrier discharge (DBD) plasma system. A broad range of aromatic compounds, including benzene, were successfully transformed into their corresponding aromatic nitriles. Both experimental and computational evidence suggested that the reaction proceeds primarily via the in situ generation of •CN radicals from N 2 and CH 4 within the plasma zone. Subsequent radical addition to aromatic rings allowed the one-pot formation of aryl nitriles. This approach represents a major advancement in dinitrogen-based organic methodologies, providing an efficient alternative to conventional cyanation methods that heavily rely on lengthy synthetic routes and hazardous cyanide reagents.
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ACS Catalysis
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2026
·
IF 13.6
Shi Zhanghan,Duan Fangyu,Liu Yafei,Zhang Xianwang,Song Guoquan,Yang Xiaomeng,Ma Qianli,Zhang Zongwu,Wu Dan,Xu Chunbao,Zhang Yongsheng
Cascade catalytic upgrading of biomass-derived furanic compounds to high-value cyclopentanone (CPO) and cyclopentanol (CPL) over metal–acid bifunctional catalysts has attracted considerable attention in sustainable chemistry. However, conventional bifunctional catalysts exhibit insufficient synergistic effects, primarily due to the lack of flexibility in tuning the ratio of acidic to hydrogenative active sites. Herein, we demonstrate that halogen (Br and Cl) modification of supported Cu catalysts significantly enhances both activity and selectivity in the aqueous-phase hydrogenative rearrangement of furfuryl alcohol (FOL), achieving a CPO yield of 94.4% and a CPL yield of 94.6%, respectively. Extensive characterizations reveal that the electronegative Br and Cl adatoms effectively modulate the electronic state of Cu nanoparticles, facilitating the formation of Lewis acidic Cu + sites on the catalyst surface. Mechanistic investigations disclose that Cu + sites mediate the rearrangement of FOL to 4-hydroxy-2-cyclopentenone (4-HCP), while adjacent Cu 0 sites catalyze the hydrogenation of 4-HCP to CPO, followed by its subsequent hydrogenation to CPL. Different binding strengths between Cu and halogens (I > Br > Cl) allow the regulation of the Cu + /Cu 0 ratio on the Cu surface, which in turn provides an effective way to control the reaction pathway. The developed halogen modification strategy not only offers great potential for the upgrading of biomass-derived furanics to cyclopentane derivatives but also presents a versatile strategy for regulating the surface Lewis acidity of metal catalysts, which is crucial for metal–acid bifunctional catalysis.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
·
IF 8.6
Fan Wu,Hao Li,Yang Pan,Yingjia Wang,Yonghui Sun,Jianming Pan
The rapid and accurate recovery of precious metal palladium from waste resources has always been a hot and challenging topic. In addition, from the perspective of energy and environmental protection, the regeneration and rational use of waste are also crucial for a sustainable future. Here, an 8-aminoquinoline-modified core–shell magnetic nano stirring robot (MNSR@PGMA-AQ) towards Pd(Ⅱ) is reported which not only has ultra-high solid–liquid separation efficiency but also can accelerate the mass transfer rate in adsorption through self-stirring. A series of adsorption experiments show that MNSR@PGMA-AQ has fast adsorption kinetics, reaching 10.97 mg g −1 in 20 min, which is 85.87 % of the equilibrium adsorption capacity. And selectivity parameters such as distribution coefficient ( K D ), separation factor ( α ) and concentration factor ( CF ) demonstrate its excellent adsorption selectivity for Pd(Ⅱ). Moreover, it is proved that the adsorption mechanism of MNSR@PGMA-AQ towards Pd(Ⅱ) is ion exchange and chelation, which mainly depends on the functional monomer 8-aminoquinoline. The regeneration and palladium recovery experiments in actual samples further prove the application value of this novel robot. Furthermore, Pd-loaded MNSR@PGMA-AQ was used as a catalyst for the Suzuki-Miyaura cross-coupling reaction and investigated its catalytic performance to pursue the goal of waste regeneration and responsible catalyst manufacture.
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CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Hao Ling,Lei Wang,Qixuan Lin,Quanbo Huang,Xiaoqian Zhang,Junli Ren,Ning Li,Cheng Zhou,Zhiwei Lin,Jingpeng Zhou,Wenguang Wei,Xiaohui Wang
Separating films with both high efficiency and large flux are desperately needed to meet the rising demand for the treatment of oily wastewater, while traditional oil/water separation papers with high separation efficiency usually suffered from low flux due to the unsuitable size of filtration pores. Herein, we report a bio-based porous, superhydrophobic , and antimicrobial hybrid cellulose paper with tunable porous structures for high flux oil/water separation. The size of pores in the hybrid paper can be tuned by both physical supports provided by the chitosan fibers and the chemical shielding supplied by the hydrophobic modification. The hybrid paper with increased porosity (20.73 μm; 35.15 %) and excellent antibacterial properties can efficiently separate a wide range of oil/water mixtures, solely by gravity, with outstanding flux (maximum of 23,692.69 L m −2 h −1 ), tiny oil interception, and high efficiency of over 99 %. This work provides new sights in the development of durable and low-cost functional papers for rapid and efficient oil/water separation.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Xulong Pang,Yong Li,Xiaofu Wu,Bingmiao Zhang,Ming Hao,Yan Zhu,Yi Zhang,Chuanjiang Qin,Hongmei Zhan,Chuanli Qin
It is highly desirable to explore functionalized polymer semiconductor/g-C 3 N 4 heterojunction photocatalysts with the tight interfacial connection for promoting the photogenerated electron-hole pair separation, improving the hydrophilicity , extending the visible light response and achieving the efficient visible light-driven H 2 evolution. Herein, we synthesized novel poly[9,9-bis(3-ethyl phosphate propyl)fluorene- alt -benzothiadiazole] (PPFBT) with a phosphate ester on every repeating unit by the Suzuki polymerization and then fabricated PPFBT/hydroxylated g-C 3 N 4 (PPFBT/CN-OH) heterojunctions via a surface hydroxyl-induced assembly process. The ratio-optimized 5PPFBT/CN-OH shows the hydrogen evolution activity of 2662.4 μmol·g −1 ·h −1 , an 11.1-time enhancement compared to CN-OH. The improved photocatalytic activity is mainly attributed to the enhanced electron-hole pair separation due to the tight interfacial connection by hydrogen bond (P=O…H-O) and N…S interactions between PPFBT and CN-OH. It is verified that abundant phosphate ester groups of PPFBT improve the hydrophilicity and form coordination bonds with platinum (P=O:Pt) as a cocatalyst to facilitate water splitting for H 2 evolution. It is also confirmed that the enhanced electron-hole pair separation is mainly dependent on the excited high-energy level electron transfer from CN-OH to PPFBT. This work provides a rational molecular design strategy for constructing efficient functionalized polymer semiconductor/g-C 3 N 4 heterojunctions for sunlight-driven H 2 evolution.
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JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
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2022
·
IF 3.262
Qiuyu Lin,Luyun Xue,Jiannan Sun,Yuanchao Wang,Heyong Cheng
Suzuki–Miyaura cross-coupling is one of the most powerful strategies for constructing biaryl compounds. However, classic Suzuki–Miyaura coupling suffers from hour-scale reaction time and competitive protodeboronation. To address these problems, a mild nonaqueous potassium trimethylsilanolate (TMSOK)-assisted Suzuki–Miyaura coupling strategy was designed for the microsynthesis of biaryls in paper spray ionization (PSI). Due to the acceleration power facilitated by microdroplet chemistry in reactive PSI, the microsynthesis of biaryls by reactive PSI was accomplished within minutes with comparable yields to the bulk, showing good substrate applicability from 32 Suzuki–Miyaura reactions of aryl bromides and aryl boronic acid/borates bearing different substituents. Based on the above TMSOK-assisted Suzuki–Miyaura coupling strategy, we further developed a high-sensitivity and selective PSI mass spectrometry (MS) method for quantitative analysis of aryl bromides, a class of environmentally persistent organic pollutants that cannot be directly detected by ambient mass spectrometry due to their low ionization efficiency. In situ derivatization of aryl bromides was achieved with aryl borates bearing quaternary ammonium groups in PSI. The proposed PSI-MS method shows good linearity over the 0.01–10 μmol L–1 range with low detection limits of 1.8–4.8 nmol L–1 as well as good applicability to the rapid determination of six aryl bromides in three environmental water samples. The proposed PSI-MS method also shows good applicability to brominated flame retardants (polybrominated diphenyls/diphenyl esters). Overall, this study provides a simple, rapid, low-cost, high-sensitivity, and high-selectivity strategy for trace aryl bromides and other brominated pollutants in real samples with minimal/no sample pretreatment.
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ANALYTICAL SCIENCES
·
2022
·Vol. 38
·期 2
·383-392
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IF 1.967
Han Xingwei,Yu Wenjie,Zhang Lin,Li Hengye,Kong Fenying,Wang Wei
The functionalization of porous aromatic frameworks (PAFs) is essential for task-specific application of these materials as advanced adsorbents in water treatment. In this study, a carboxyl-functionalized PAF was prepared by the post-synthesis modification of a HOCH 2 -tagged PAF, which was synthesized from a precursor-designed method. The synthesized PAFs were comprehensively characterized. The targeted PAF-COOH showed hierarchical porosity with the coexistence of micropores and mesopores. The carboxyl groups were distributed homogeneously across the whole material, and its content was as high as 4.18 meq g −1 . An equilibrium adsorption isotherms study demonstrated that the adsorption of cationic dyes fitted well to the Langmuir model and the maximum adsorption capacities of methylene blue (b-MB) and phenosafranine obtained at pH 10 were 775.19 and 588.24 mg g −1 , respectively. The adsorption kinetics of cationic dyes followed the pseudo-second order kinetic model. Quick kinetics was demonstrated with the k 2 for a 100 mg L −1 b-MB solution as high as 2.83 g mg −1 min −1 and the equilibrium time was just 0.5 min. In addition, the dye-loaded PAF-COOH could be regenerated easily and showed excellent reusability. These significant characters indicated a promising prospect of the PAF-COOH for water treatment. Graphical abstract
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ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 27
·2201035
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IF 19.924
Yaoxia Li,Zehang Cui,Guoqiang Li,Haoyu Bai,Ruyuan Dai,Yingzi Zhou,Yan Jiao,Yuegan Song,Yi Yang,Senyun Liu,Moyuan Cao
Manipulating oil droplets in an aqueous solution offers great opportunities to develop advanced devices in the fields of water remediation, chemical micro-reactor, etc. Although conical structures can achieve a directional oil droplet motion, the continuous and adaptive fluid self-transport in complicated environments is still a challenge. Inspired by the distinctive oil transport capability of fishbone and the anisotropic grooved structure of rice leaves, this work presents a multi-bioinspired grooved conical spine (BGCS) for improved oil manipulation. Benefiting from the cooperative effect of the asymmetric Laplace pressure and the surface capillary force, the BGCS possesses the reliable functions of ultrafast and continuous oil transport under water, in air, and even across the air–water interface. Compared with the original cone, the BGCS demonstrates a nine times faster transporting velocity and a five times larger capacity. It is envisioned that this updated oil-collecting cone with its cooperative structure should find real-world applications.
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ACS Applied Nano Materials
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2022
·
IF 6.14
Lijing Zhang,Jiaqi Han,Yuchao Wang,Wenbo Yang,Shengyang Tao
Achieving a room-temperature Suzuki–Miyaura coupling (SMC) with high efficiency is of great significance to the development of low-carbon organic synthesis. Nevertheless, it is still a great challenge to construct a promising nanocatalyst with high activity for room-temperature SMC reaction. In this paper, a strong alkaline-supported nanocatalyst Pd/Mg(OH)2/MgO–ZrO2 was rationally developed based on MgO–ZrO2 hybrid nanofibers. Physicochemical characterizations present that the in situ conversion of MgO to Mg(OH)2 on the surface of the nanofibers results in a great increase in surface alkalinity of the carrier. The strong alkalinity can greatly accelerate the oxidation addition and transmetalation of the SMC process, resulting in the obvious reduction of activation energy of the reaction (Ea = 9.0 kJmol–1 for Ph–Br). The coupling conversion can reach up to 100% at room temperature within 8 min with a maximum TOF > 6516 h–1. It also shows an excellent performance in substrate applicability and chlorobenzene activation. The rational design of a high-basicity catalyst for room-temperature SMC will be a rewarding attempt for the development of low-carbon green organic synthesis.
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JOURNAL OF MASS SPECTROMETRY
·
2022
·Vol. 57
·期 3
·e4813
·
IF 2.394
Liutian Wu,Keke Qi,Minggao Xu,Chengyuan Liu,Yang Pan
Desorption electrospray ionization/post-photoionization (DESI/PI) is a newly developed ionization method by the combination of DESI and post-photoionization for the simultaneous imaging of polar and nonpolar compounds in biological tissues. Dopants are of great importance in DESI/PI for the enhancement of signal intensities through ion–molecule reactions. In this work, to evaluate the performance of dopants in DESI/PI, an efficient homogenate model was developed, and four kinds of dopants (toluene, chlorobenzene, bromobenzene, and anisole) were tested using homogenate of mouse brain tissue as target sample. The influences of the dopants on the signal enhancements of different compounds were explained reasonably by the ionization mechanism. Then, the dopants with their optimum volume contents were applied to the mass spectrometry imaging (MSI). For a comprehensive imaging of various compounds with different polarities, methanol/toluene/formic acid (7:3:0.1) was chosen as the best choice. Finally, the stronger quantitative ability of DESI/PI with toluene as dopant for a few compounds in mouse brain tissue was demonstrated.
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