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Xu B.,Zhejiang University of Technology | Cao X.,Zhejiang University of Technology | Zhu B.,Zhejiang University of Technology | Zhu B.,Zhejiang Research Institute of Chemical Industry | And 4 more authors.
Applied Surface Science | Year: 2015

A facile synthetic method of oleic acid decorated Cu2O microcrystals has been developed by thermal decomposition of copper formate-octylamine complexes in paraffin using oleic acid as dispersing agent. This new method showed many advantages, which include free-reducing agent, enhancing antioxidant properties of Cu2O and good dispersity in paraffin, etc. The phase structure and morphology were investigated by means of XRD, SEM and TEM. It is found that the reaction time and temperature play the important roles in the crystallite morphology. With the increase of the reaction time, the Cu2O rhombic dodecahedron is gradually transformed into the spherical particle by intraparticle ripening. The shape evolution of Cu2O microcrystals can be accelerated with the increase of temperature. © 2015 Elsevier B.V. All rights reserved.


Jun He R.,Zhejiang University of Technology | Chun Zhu B.,Zhejiang University of Technology | Chun Zhu B.,Zhejiang Research Institute of Chemical Industry | Wang Y.G.,Zhejiang University of Technology
Applied Organometallic Chemistry | Year: 2014

A facile solid-phase synthesis approach was developed for the rapid synthesis of multi-substituted furan-2(5H)-one derivatives libraries. The synthetic strategy included the selenyl bromide resin-induced electrophilic lactonization catalyzed by Lewis base, lithiation, nucleophilic substitution and oxidation-elimination of the selenium resins. The advantages of the new method are good yields, high purity, straightforward operations and high diversity of the products, lack of odor, and good stability of the selenium resins. Copyright © 2014 John Wiley & Sons, Ltd.


Wang Y.-G.,Zhejiang University of Technology | Huang G.-B.,Taizhou University | Zhu B.-C.,Zhejiang University of Technology | Zhu B.-C.,Zhejiang Research Institute of Chemical Industry
Acta Crystallographica Section E: Structure Reports Online | Year: 2010

Two crystallographically independent molecules, A and B, with similar conformations are present in the asymmetric unit of the title compound, C 18H16F2N4O4. In molecule A, the plane of the 1,2,4-triazole ring is tilted relative of the 4-difluoromethoxy- substituted and the 3,4-dimethoxysubstituted benzene rings by 6.5 (2) and 16.4 (1)°, respectively. The -CHF2 group is twisted away from the plane of the benzene ring, with a dihedral angle between the O-C bond of the OCHF2 group and the plane of the adjacent phenyl ring of 38.6 (3)°. The corresponding parameters for molecule B are 7.7 (1), 9.5 (2) and 25.2 (2)°. In both molecules, the conformations are stabilized by intramolecular N-H⋯N and C-H⋯O hydrogen bonds. There are also C-H⋯π contacts between the methyl groups and the benzene rings, and π-π stacking interactions between the benzene rings of adjacent parallel A molecules [centroid-centroid distance = 3.8942 (17) Å]. π-π interactions are also observed between the triazole ring and one of the benzene rings of parallel B molecules [centroid-centroid distance = 3.7055 (16) Å].


Wang Y.,Zhejiang University of Technology | Yu L.,Zhejiang University of Technology | Zhu B.,Zhejiang University of Technology | Zhu B.,Zhejiang Research Institute of Chemical Industry | Yu L.,Yangzhou University
Journal of Materials Chemistry A | Year: 2016

Hexavalent Se? Yes! Selenium on polymers exhibits quite different properties compared to that in small molecules. Hexavalent Se, rare in organoselenium chemistry, was found to be the major species on polymers. The high-valent Se species on recyclable polymer resins could quickly catalyze the oxidation reaction of cyclohexene with H2O2 in water to produce industrially important intermediate trans-1,2-cyclohexanediol in almost quantitative yield. In the catalytic cycle, high valent Se species were reduced to divalent Se, a highly activated species that could be re-oxidized by air so that no excess H2O2 was required for the reaction. The results were superior to those of reactions catalyzed by small molecules, for which excess H2O2, long reaction time or expensive CF3-activated catalysts and environmentally unfriendly MeCN solvent were required. © 2016 The Royal Society of Chemistry.


Wang Y.,Zhejiang University of Technology | Zhu B.,Zhejiang University of Technology | Zhu B.,Zhejiang Research Institute of Chemical Industry | Xu Q.,Yangzhou University | And 2 more authors.
RSC Advances | Year: 2014

Organoseleno polystyrene resin-supported synthesis provided quick access to a series of acylbenzofuran derivatives tethered to isoxazoles, triazoles and isoxazolines as well as benzodifurans. Although this methodology proceeded through multiple steps such as the seleno-induced attachment, nucleophilic substitutions, 1,3-dipolar cycloadditions, and syn-selenoxide eliminations from organoseleno resin, the overall product yields were generally good. The concise and safe procedures, wide application scope, lack of odor, stability and recyclability of the organoseleno resin, and the good yields and high purity of products are the advantages of this work over the more traditional solution-based chemistry. This journal is © the Partner Organisations 2014.


Huang G.,Taizhou University | Zhu B.,Zhejiang Research Institute of Chemical Industry | Shi H.,Zhejiang Pharmaceutical College
Journal of Applied Polymer Science | Year: 2011

A combination effect was observed between organics-modified montmorillonite (OMMT) and a novel intumescent flame retardant, diphenylmethanamine spirocyclic pentaerythritol bisphosphonate (PSPD), in low-density polyethylene (LDPE) nanocomposites. The results from X-ray diffraction and transmission electron microscopy showed that montmorillonite can achieve better dispersion in LDPE/PSPD blend matrix, and exfoliated LDPE/PSPD/OMMT nanocomposites are formed. Thermal stability and flammability properties were investigated by thermogravimetric analysis and cone calorimeter tests. The combination effect of PSPD and montmorillonite improved thermal stability and reduced significantly the flammability (including heat release rate, total heat release, average mass loss rate, etc.). The peak heat release rate of LDPE/PSPD/OMMT is reduced by about 51% compared with pure LDPE. The morphology and composition of residues generated after cone calorimeter tests were investigated by scanning electron microscopy and X-ray photoelectron spectroscopy. The scanning electron microscopy images showed that the compact and dense intumescent char is formed for LDPE/PSPD/OMMT nanocomposite after combustion. The results of X-ray photoelectron spectroscopy confirmed that the carbon content of the char for LDPE/PSPD/OMMT increases obviously by the combination effect of PSPD and montmorillonite. © 2011 Wiley Periodicals, Inc.


PubMed | Zhejiang Research Institute of Chemical Industry and Shaanxi University of Technology
Type: Journal Article | Journal: The journal of physical chemistry. A | Year: 2016

The rate constant for gas-phase reactions of OH radicals with 1H-heptafluorocyclopentene (cyc-CF


Hu M.,Zhejiang University | Yu W.-J.,Zhejiang Research Institute of Chemical Industry | Dong Q.-Q.,Zhejiang University | Lin S.-D.,Zhejiang Research Institute of Chemical Industry | And 2 more authors.
Xiandai Huagong/Modern Chemical Industry | Year: 2015

The purification of 2-chloro-5-(trifluoromethyl) pyridine (2, 5-CTF) by melt crystallization is experimentally studied. The effects of cooling rate, final temperature in the crystallization process, heating rate and final temperature in the sweating process on the yield and purity of the product are investigated. The purity of 2, 5-CTF obtained by one time melt crystalization can reach 99% under the following conditions: 0.071℃/min of the cooling rate, 16-19℃ of the final crystallization temperature, 0.062-0.083℃/min of the heating rate during sweating and 28-30℃ of the final sweating temperature. ©, 2015, China National Chemical Information Center. All right reserved.


Dong Q.,Zhejiang University | Yu W.,Zhejiang Research Institute of Chemical Industry | Hu M.,Zhejiang University | Lin S.,Zhejiang Research Institute of Chemical Industry | And 4 more authors.
Huagong Xuebao/CIESC Journal | Year: 2015

2-Chloro-5-trifluoromethylpyridine and 3-trifluoromethylpyridine are produced by β-picoline reacting with chlorine and hydrogen fluoride in a fluidized-bed reactor. The total yield of 2-chloro-5-trifluoromethylpyridine and 3-trifluoromethylpyridine reaches 66.6% over the CrO-Al catalyst at a space velocity of 288 h-1 and temperature of 300℃. The reactivity of the deactivated catalysts is recovered after regeneration at 350℃ with mixed gas of nitrogen and air at volume ratio of 1:1. The total yield is around 66% with regenerated catalysts under the condition of 288 h-1 and 300℃. According to the reaction result, the mechanism of one-step chlorofluorination reaction is proposed, dehydrochlorination-condensation of intermediate products accounted for coking. The results of BET, TG and NH3-TPD characterizations indicate that the deactivation of the catalysts is caused by the carbonaceous by-products which cover the surface and pores of the catalyst. © All Right Reserved.


Guo M.,Zhejiang Research Institute of Chemical Industry | Yu F.,Zhejiang Research Institute of Chemical Industry | Jia K.,Zhejiang Research Institute of Chemical Industry | Li J.,Zhejiang Research Institute of Chemical Industry | Sun H.,Zhejiang Research Institute of Chemical Industry
Chinese Journal of Chromatography (Se Pu) | Year: 2016

A method has been developed for the simultaneous determination of tetracycline antibiotics in environmental water by magnetic solid phase extraction and high performance liquid chromatography-tandem mass spectrometry. Several important parameters affecting the magnetic solid phase extraction procedure have been optimized for the best recovery. The eluate was analyzed by high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) under multiple reaction monitoring (MRM) mode with a ZORBAX Eclipse Plus C18 column. Under the optimized conditions, the six tetracycline antibiotics (4-epitetracycline, oxytetracycline, tetracycline, demclocycline, chlortetracycline, anhydrotetracycline) showed good linearities in the range of 1-100 μg/L with the correlation coefficients of 0.9967-0.9993. The limits of detection (LODs) were in the range of 2.44 ng/L to 25.21 ng/L. The spiked recoveries were 80.6%-90.0%. The intra-day relative standard deviations (RSDs) were 0.6%-2.5%, while the inter-day RSDs were 1.1%-7.1%. The method has low background and high sensitivity. It was successfully applied to the simultaneous determination of the six trace tetracycline antibiotics in environmental water.

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