Time filter

Source Type

Chen P.,Shaanxi Normal University | Xu Y.,Shaanxi Normal University | Du W.,Xian Caijing Opto Electrical Science and Technology Co. | Zhang G.,Xian Caijing Opto Electrical Science and Technology Co. | And 3 more authors.
Molecular Crystals and Liquid Crystals | Year: 2014

A series of novel mesogenic 2-(4-alkoxyphenyl-1-yl)-benzoxazole derivatives bearing different substituents (H, NO2, CH3, Cl, coded as nPB-H, nPB-N, nPB-M, and nPB-C, respectively) at the 5-position were prepared and characterized. nPB-N, nPB-M, and nPB-C exhibited enantiotropic smectic mesophases with the mesophase ranges 3 °C-32 °C and 3 °C-82 °C on heating and cooling processes, whereas nPB-H showed no mesophases. The substituents with the stronger electron withdrawing effect let to the wider mesomorphic temperature domain. The nPB-M, nPB-C, and nPB-H displayed intense emission in CH2Cl2 solutions with λmax peaks of the photoluminescence spectra at 350-355 nm when excited at their absorption maxima. Copyright © Taylor & Francis Group, LLC.


Gan N.,Xian Caijing Opto Electrical Science and Technology Co. | Li N.,Xian Caijing Opto Electrical Science and Technology Co. | Mo H.-C.,Xian Caijing Opto Electrical Science and Technology Co. | Lu X.-M.,Xian Caijing Opto Electrical Science and Technology Co. | Zhang W.-C.,Xian Caijing Opto Electrical Science and Technology Co.
Guti Huojian Jishu/Journal of Solid Rocket Technology | Year: 2014

Bis-propargyl-succinate(BPS)were synthesized from succinic acid and propargyl alcohol. Azide binders ATP were successfully cured with bis-propargyl-succinate(BPS)via 1, 3 dipolar cycloaddition reaction between the azido groups of ATP and the triple bonds of the propargyl esters. As a result of introducing isocyanurate group, the mechanical properties of ATP/BPS crosslinked polymers were better than GAP. Within the range of the researchr, the tensile strength/elongation at room temperature were 0.792-2.05 MPa/90%-70%, in which, 90.27%ATP/9.73%BPS had the better comprehensive properties. ©, 2014, Journal of Solid Rocket Technology. All right reserved.


Liu H.-N.,Xi'an Modern Chemistry Research Institute | Zhang G.,Xi'an Modern Chemistry Research Institute | Hu L.,Xi'an Modern Chemistry Research Institute | Su P.-F.,Xi'an Modern Chemistry Research Institute | Li Y.-F.,Xian Caijing Opto Electrical Science and Technology Co.
Acta Crystallographica Section E: Structure Reports Online | Year: 2011

The title molecule, C40H30, lies on an inversion center. The two unique phenyl rings form dihedral angles of 51.98 (8) and 67.58 (8)° with the essentially planar biphenyl unit [maximum deviation = 0.0360 (14) Å].


Zhang Y.-G.,Xi'an Modern Chemistry Research Institute | Wang B.-Z.,Xi'an Modern Chemistry Research Institute | Hu Y.-H.,Xian Caijing Opto Electrical Science and Technology Co. | Li W.-J.,Xi'an Modern Chemistry Research Institute | And 4 more authors.
Huozhayao Xuebao/Chinese Journal of Explosives and Propellants | Year: 2011

Starting from diaminofurazan(DAF), 5,5'-[methanedinitramino-bis(1,2,5-oxadiazol-4,3-diyl)] bis[1H-[1,2,3]triazolo[4,5-c]-[1,2,5]oxadiazolium] -bis(innersalt)(MNOTO) was synthesized by oxidation with Caro's acid, reduction with Zn dust, cyclization, condensation reaction and nitration with condense nitrate acid/acetic anhydride in 32.7% yield. The structures of intermediates and MNOTO were characterized by elemental analyses, IR and NMR.Condense nitrate acid with acetic anhydride was employed in the nitration of 5,5'-[Methanediamino-bis(1,2,5-oxadiazol-4,3-diyl)] bis[1H-[1,2,3]triazolo[4,5-c][1,2,5]oxadiazolium] -bis(innersalt)(MAOTO).The effects of reaction temperature, reaction time and molar ratio of condense nitrate acid to acetic anhydride on the conversion of MAOTO to MNOTO were studied. The optimal reaction conditions obtained were: reaction temperature, 15-20°C; reaction time, 5h; the molar ratio of condense nitrate acid to acetic anhydride, 1.5:1.


Gao A.-A.,Xi'an Caijing Opto Electrical Science and Technology Co. | Zhang G.-P.,Xi'an Caijing Opto Electrical Science and Technology Co. | Bie G.-J.,Xi'an Caijing Opto Electrical Science and Technology Co. | Song K.-G.,Xi'an Caijing Opto Electrical Science and Technology Co. | Zheng Y.-Y.,Xi'an Caijing Opto Electrical Science and Technology Co.
Chinese Journal of Liquid Crystals and Displays | Year: 2016

The paper introduces the structure factors of the formation of large birefringence liquid crystal compounds and acetylenic large birefringence liquid crystal compounds. The study found that, two aryl substituted acetylene (PTP) liquid crystalline birefringence is in the range of 0.25 ~ 0.49; double alkyl diphenyl acetylene (PPTP) liquid crystal Δn in the range of 0.32 ~ 0.5; bis two acetylene (PTTP, PTDTP, PTPTP) liquid crystalline birefringence in the range of 0.35 ~ 0.67; terphenyl acetylene benzene liquid crystal compound delta n value is about 0.54; cyano or isothiocyanate benzene alkyne liquid crystalline birefringence is in the range of 0.25 ~ 0.79; condensed ring group phenylacetylene liquid crystal birefringence in 0.36 ~ 0.79.Liquid crystal materials containing acetylenic benzene have large birefringence and practice value. © 2015, Science Press. All rights reserved.

Loading Xian Caijing Opto Electrical Science and Technology Co. collaborators
Loading Xian Caijing Opto Electrical Science and Technology Co. collaborators