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Guo L.,Institute of Chemistry Henan Academy of science | Liu P.,Institute of Chemistry Henan Academy of science | Gao L.,Zhengzhou Environmental Monitoring Detachment
Speciality Petrochemicals | Year: 2014

9,9-Dioctylfluor-ene-2,7-bis-(trimethylene boronate) and 9 , 9-dihexylfluor-ene-2 , 7-bis-(tri-methylene boronate) was synthesized by one-pot reaction using 2 , 7-dibromo-9 ,9-dioctylfluorene, 2,7-dibromo-9, 9-dihexylfluorene and trimethylene borate as materials with the yield of 80. 5% and 78. 4%. In addition, the other aryl boronic acid propanediol cyclic esters were synthesized successfully with the yield of 80%- 91% by the same method using aryl halides and trimethylene borate as materials.


Hongsong Z.,Institute of Chemistry Henan Academy of science | Hongsong Z.,Henan Institute of Engineering | Lei S.,Zhengzhou Railway Vocation Technical College | Yongde Z.,Institute of Chemistry Henan Academy of science | And 2 more authors.
Journal of Materials Engineering and Performance | Year: 2015

The (Sm0.5Gd0.5)2(Ce1−xZrx)2O7 oxides were prepared by solid-state reaction, and their phase compositions, microstructures, and thermophysical properties were investigated. Results of x-ray diffraction reveal that pure (Sm0.5Gd0.5)2(Ce1−xZrx)2O7 oxides with fluorite structure are successfully synthesized in the current study. The thermal expansion coefficient decreases with increasing content of ZrO2, which is higher than that of 7 wt.% yttria-stabilized zirconia (YSZ). The substitution of Zr4+ for Ce4+ reduces the thermal conductivity of Sm2Ce2O7 oxide. The thermal conductivity decreases from 1.69 W/m K (x = 0) to 1.22 W/m K (x = 0.3) at 1000 °C. The composition with x = 0.3 exhibits the lowest thermal conductivity at all temperatures, and the thermal conductivity of (Sm0.5Gd0.5)2 (Ce1−xZrx)2O7 ceramics was obviously lower than those of fully dense 7 wt.% YSZ. These results suggested promising potential applications of the (Sm0.5Gd0.5)2 (Ce1−xZrx)2O7 ceramics for high-temperature thermal barrier coatings. © 2015, The Author(s).


Li Z.,HIGH-TECH | Wang J.,HIGH-TECH | Zhao J.,Institute of Chemistry Henan Academy of science | Zhao C.,U.S. Center for Disease Control and Prevention | And 2 more authors.
Chinese Journal of Organic Chemistry | Year: 2014

Triarylmethanes (TRAMs) constitute an important class of compounds that are ubiquitous in material, medicals, and dyes. Numerous methods have been developed for the synthesis of TRAMs. This minireview critically presents the synthesis of TRAMs to encourage further research activities in this promising area of the TRAMs. © 2014 Chinese Chemical Society & SIOC, CAS.


Guo L.,Henan Normal University | Guo L.,Institute of Chemistry Henan Academy of science | Zhang S.,Henan Normal University
Zeitschrift fur Kristallographie - New Crystal Structures | Year: 2014

C28H26N2NiO10, monoclinic, P21/n (no. 14), a = 9.4921(9) Å, b = 24.194(2) Å, c = 11.526(1) Å,β = 98.607(1)°, V = 2617.1 Å3, Z = 4, Rgt(F) = 0.0308, wRref(F2) = 0.0822, T = 296 K. © 2014 by Walter de Gruyter Berlin/Boston.


Xiaoge C.,Henan Institute of Engineering | An T.,Henan Institute of Engineering | Hongsong Z.,Henan Institute of Engineering | Yanxu L.,Henan Institute of Engineering | And 2 more authors.
Ceramics International | Year: 2016

Two kinds of novel Ln2LaTaO7 (Ln=Er and Yb) ceramics were prepared via high-temperature solid reaction method. The phase composition, micro-morphology and thermophysical properties were investigated. Results indicate that pure Ln2LaTaO7 ceramics with single fluorite-type structure are synthesized successfully. The thermal conductivities of Er2LaTaO7 and Yb2LaTaO7 are in the range of 1.22-1.43W/mK and 1.17-1.51W/mK, respectively, which are much lower than that of YSZ. The lower thermal conductivity can be attributed to the phonon scattering caused by oxygen vacancies and the substituting atoms. The average thermal expansion coefficients of Yb2LaTaO7 and Er2LaTaO7 are 9.94×10-6/K and 9.63×10-6/K, respectively. As compared with Yb2LaTaO7, the higher thermal expansion coefficient of Er2LaTaO7 can be ascribed to its lower ionic-bond strength between cations at sites A and B. © 2016.


Qiu Z.M.,Henan Quality Polytechnic | Xi H.P.,Henan Quality Polytechnic | Zhang S.S.,Henan Quality Polytechnic | Li X.D.,Henan Quality Polytechnic | Hou D.N.,Institute of Chemistry Henan Academy of science
Structural Chemistry | Year: 2015

The 5-fluorocytosine (5-FC) is a fluorinated cytosine analog that is used as an antifungal agent. In this work, we present the hydrogen-bonding base pairs involving 5-FC bound to the four bases in DNA: adenine (A), cytosine (C), guanine (G), and thymine (T). Full geometry optimizations have been performed for the studied complexes by MP2 method. The interaction energies were corrected for the basis set superposition error, using the full Boys–Bernardi counterpoise correction scheme. Hydrogen-bonding patterns of these base pairs were characterized using NBO analysis and AIM analysis. According to the calculated binding energies and structural parameters, the stability of the base pairs decreases in the following order: 5-FC:G > 5-FC:C > 5-FC:A > 5-FC:T. © 2015 Springer Science+Business Media New York


Qiu Z.M.,Henan Quality Polytechnic | Wang G.L.,Bengbu College | Wang H.L.,Henan Quality Polytechnic | Xi H.P.,Henan Quality Polytechnic | Hou D.,Institute of Chemistry Henan Academy of science
Structural Chemistry | Year: 2014

The 5-fluorouracil is a pyrimidine analog effective in the treatment of cancer. In this work, we present the hydrogen-bonding base pairs involving 5-FU bound to the four bases in DNA: adenine, cytosine, guanine, and thymine. Full geometry optimizations have been performed for the studied complexes by MP2 method. The interaction energies were corrected for the basis-set superposition error, using the full Boys-Bernardi counterpoise correction scheme. Hydrogen-bonding patterns of these base pairs were characterized using NBO analysis and AIM analysis. According to the calculated binding energies and structural parameters, the stability of the base pairs decrease in the following order: 5-FU:A > 5-FU:G > 5-FU:T > 5-FU:C. © Springer Science+Business Media 2014.

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