LiaochengUniversity

Liaocheng, China

LiaochengUniversity

Liaocheng, China

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Liu J.,LiaochengUniversity | Zhuang Y.,LiaochengUniversity | Li Y.,Liaocheng University | Chen L.,Liaocheng University | And 3 more authors.
Energy | Year: 2013

Microwave-assisted direct liquefaction (MADL) of Ulva prolifera was performed in ethylene glycol (EG) using sulfuric acid (H2SO4) as a catalyst. Response Surface Methodology (RSM) based on central composite rotatable design (CCRD) was employed to optimize the conditions of three independent variables (catalyst content, solvent-to-feedstock ratio and temperature) for the liquefaction yield. And the bio-oil was analyzed by elementary analysis, Fourier transform infrared spectroscopic analysis (FT-IR) and gas chromatography-mass spectrometry (GC-MS). The maximum liquefaction yield was 93.17%, which was obtained under a microwave power of 600W for 30min at 165°C with a solvent-to-feedstock ratio of 18.87:1 and 4.93% sulfuric acid. The bio-oil was mainly composed of phthalic acid esters, alkenes and a fatty acid methyl ester with a long chain from C16 to C20. © 2013 Elsevier Ltd.


Wang Q.,LiaochengUniversity | Wang Q.,Shandong Provinical Key Laboratory of Optical Communication Science and Technology | Shi Q.,LiaochengUniversity | Shi Q.,Shandong Provinical Key Laboratory of Optical Communication Science and Technology | And 6 more authors.
Journal of Luminescence | Year: 2015

The luminescence properties of Eu(TTFA)3 complex in presence of silver nanoparticles were investigated at three excitation wavelengths of 350 nm, 383 nm and 463 nm, respectively. Luminescence quenching and enhancement were both observed at three different excitation and emission wavelengths. Luminescence at 612 nm, 578 nm, 590 nm and 650 nm were enhanced at excitation wavelength of 350 nm, and quenched at excitation wavelength of 383 nm. The enhancement factor reached to 1.6 and the quench factor was about 0.65. For 463 nm excitation, the luminescence at 612 nm was quenched, and the quench factor reached to 0.85. Luminescence at other three emission wavelengths (578 nm, 590 nm, and 650 nm) was enhanced, with the greatest enhancement factor of ~5.


Jin S.,Zhejiang Agriculture And forestry University | Dong Q.,Zhejiang Agriculture And forestry University | Wang D.,LiaochengUniversity | Zhou W.,Zhejiang Agriculture And forestry University
Journal of Molecular Structure | Year: 2012

Studies concentrating on hydrogen bonding between the base of exobidentate bis(imidazole) derivatives, and 2-aminoheterocyclic compounds, and (±)-1,10-binaphthalene-2,2′-diol have led to an increased understanding of the role the aromatic N-containing compounds have in binding with (±)-1,10-binaphthalene-2,2′-diol. Here anhydrous multicomponent adducts of N-containing aromatic bases such as 1,4-bis(N-imidazolyl)butane (L1), 1,3-bis(N-benzimidazolyl)propane (L2), 1,4-bis(N-benzimidazolyl)butane (L3), 1,5-bis(N-benzimidazolyl)-3-oxapentane (L4), 2-amino-4-phenylthiazole (L5), and 2-amino-5,7-dimethyl-1,8-naphthyridine (L6) have been prepared with (±)-1,10-binaphthalene-2,2′-diol (binol). The six crystalline forms reported are cocrystals of which the crystals and complexes were characterized by X-ray diffraction analysis, IR, mp, and elemental analysis. The inter-ring angles (naphthol/naphthol) in the same binol of the six cocrystals ranged from 70.71°to 104.2°as the organic bases varied. In the six cocrystals, the binols exist either as both of the enantiomers of rac-binol or as only of its single enantiomer. All supramolecular architectures of cocrystals 1-6 are stabilized by O-H⋯N hydrogen bonds. In addition other non-conventional interactions (CH-π, CH 3-π, NH-π, S-π, and π-π interactions) play an important role in the solid-state packing of co-crystallization as well. These weak interactions combined, all of the six complexes displayed 3D network structure. © 2012 Elsevier B.V. All rights reserved.


Jin S.,Zhejiang Agriculture And forestry University | Yan P.,Zhejiang Agriculture And forestry University | Wang D.,LiaochengUniversity | Xu Y.,Zhejiang Agriculture And forestry University | And 2 more authors.
Journal of Molecular Structure | Year: 2012

Studies concentrating on non-covalent interactions between the organic base of 6-bromobenzo[d]thiazol-2-amine, and carboxylic acid derivatives have led to an increased understanding of the role 6-bromobenzo[d]thiazol-2-amine has in binding with carboxylic acid derivatives. Here anhydrous and hydrated multicomponent organic acid-base adducts of 6-bromobenzo[d]thiazol-2-amine have been prepared with the carboxylic acids as p-nitrobenzoic acid, fumaric acid, l-tartaric acid, and terephthalic acid. The four crystalline compounds were characterized by X-ray diffraction analysis, infrared (IR), melting point (mp), and elemental analysis. All structures adopted hetero R22(8) supramolecular synthons except the salt 3. Analysis of crystal packing of the compounds under study suggests that there are NH⋯O, OH⋯N, and OH⋯O hydrogen bonds (charge assisted or neutral) between acid and base components in the supramolecular assemblies. © 2012 Elsevier B.V. All rights reserved.

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