http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Synthesis and Curing of AUT-PNIMMO with Three Functional Groups
Xiaochuan Wang,Ping Li,Xianming Lu,Hongchang Mo,Minghui Xu,Ning Liu,Yuanjie Shu 한국고분자학회 2019 폴리머 Vol.43 No.4
T-PNIMMO with three functional groups was synthesized by cationic ring opening polymerization of NIMMO (3-nitratomethyl-3-methyloxetane) in the presence of TMP (trimethylolpropane) catalyzed by BF3·OEt2. Then AUTPNIMMO was synthesized by T-PNIMMO and allyl isocyanate. The polymers were characterized by FTIR, 1H NMR, 13C NMR, and their thermal stability was estimated by DSC. Moreover, tensile testing was used to evaluate the mechanical properties of polyurethane elastomer based on T-PNIMMO and toluene-2,4-diisocyanate (TDI), and isoxazoline elastomer based on AUT-PNIMMO and tetramethyl-terephthalobisnitrile oxide (TTNO). This showed an increase of tensile strength from 2.0 to 4.0 MPa and elongation at break from 150% to 500%, respectively. These results indicated that AUTPNIMMO exhibited a good thermal stability, had satisfactory mechanical properties and was expected to be used in the composite solid propellant and polymer bonded explosives.
Synthesis and Optical Properties of (A)n-π-(Ph)3N Type Dyes
Li, Xiaochuan,Kim, Sung-Hoon,Kun, Jun,Son, Young-A TaylorFrancis 2009 Molecular Crystals and Liquid Crystals Vol.504 No.1
<P>Two new (A)n-pi-(Ph)(3)N type dyes were designed, synthesized and characterized. The optical properties and structures of them were studied, including UV-visible spectroscopy, photo-luminescence spectroscopy. The geometric structures of them were calculated theoretically based on the DFT level using BLYP/GGA basis set, the HOMO/LOMO levels were also measured and calculated.</P>
Li, Xiaochuan,Shan, Dandan,Kim, Changkyeom,Son, Young-A Informa UK (TaylorFrancis) 2016 Molecular Crystals and Liquid Crystals Vol.635 No.1
<P>In this contribution, a dye (THBT) with 2,5-dimethylthiophene substituted to 2-(2-hydroxyphenyl)benzothiazole was synthesized and characterized by NMR and mass spectroscopic techniques. Its emission behavior in various solvents was investigated and obvious negative solvatochromism was observed. The emission maximum of THBT varied from deep blue (425nm) in DMSO to orange (550nm) in chloroform. It is also highly emissive in polycarbonate film and solid powder with the emission peaks 546 and 554nm, respectively. The ESIPT effect, together with the relaxation of free rotation of thiophene in the excited states, shifted the solid emission 34nm toward longer wavelength furtherly, with respect the 520nm (green) emission of HBT. Quantum calculation of frontier molecular orbitals uncovers the underlying mechanism of negative solvatochromism.</P>
A BODIPY based highly selective fluorescence turn-on sensor toward VIB and IIB metal ions
Li, Xiaochuan,Ji, Guangqian,Jung, Jae-Myung,Son, Young-A Informa UK (TaylorFrancis) 2016 Molecular Crystals and Liquid Crystals Vol.636 No.1
<P>A probe for recognition of IIB (Zn2+, Cd2+, and Hg2+) and VIB (Cr3+) was developed based on the framework of BODIPY. The probe was synthesized by attaching DPA to 4-position of BODIPY. It exhibited excellent sensitivity and selectivity function for the IIB and VIB metal ions with 1:1 stoichiometry in acetonitrile solution. The limit of detection of Zn2+, Cd2+, Hg2+, and Cr3+ were obtained by fluorescence turn-on and ranged from 20.6 to 23.1nM. Other metal cations did not interfere with the emission sensing of Zn2+, Cd2+, Hg2+, and Cr3+. The underlying mechanism of fluorescence turn-on is based on the intramolecular PET, which controlled the fluorescence on or off.</P>
A bright yellow emissive dye configured by attaching triarylamine to naphthalimide with ‒NHN˭ bridge
Li, Xiaochuan,Shan, Dandan,Oh, Wooram,Son, Young-A Informa UK (TaylorFrancis) 2016 Molecular Crystals and Liquid Crystals Vol.635 No.1
<P>In this contribution, a dye (TPN) with 1,8-naphthalimide and triphenylamine incorporated together was linked by NHN bridge. It was fully characterized by NMR and HRMS spectroscopic techniques. Highly emissive character was observed in weak and medium polar solvent. The emission maximum varied from 494 (green) to 564nm (orange). In polycarbonate film, TPN is also highly emissive with 550nm emission peak. While in solid, the emission peak was shifted to red region due to the tightly molecular packing. The propeller like configuration of triphenylamine avoids regular packing and leads to the emission character in solid. Calculation of frontier molecular orbitals uncovers the underlying mechanism of solvatochromism.</P>
Li, Xiaochuan,Kim, Young-Sung,Kim, Sung-Hoon,Jun, Kun,Son, Young-A 한국섬유공학회 2009 FIBERS AND POLYMERS Vol.10 No.6
In this contribution, three triphenylamine derivatives were synthesized and their spectral properties were investigated. Knoevenagel condensation of mono-, di-, and tri-aldehydes of triphenylamine with 1,3-indanedione yields D-$\pi$-A type dyes with push-pull chromophores. The absorption and luminescence properties of the dyes were discussed in terms of their electronic structures. The results of molecular orbital computer simulations, based on Material Studio, were found to provide a reasonable explanation for the observed spectral properties related to the push-pull features causing dramatic changes in UV-Vis absorption as well as in photoluminescence.
Effect of cathode thickness on the performance of planar Na-NiCl<sub>2</sub> battery
Lu, Xiaochuan,Chang, Hee Jung,Bonnett, Jeff F.,Canfield, Nathan L.,Jung, Keeyoung,Sprenkle, Vincent L.,Li, Guosheng Elsevier 2017 Journal of Power Sources Vol.365 No.-
<P><B>Abstract</B></P> <P>Na-beta alumina batteries (NBBs) are one of the most promising technologies for renewable energy storage and grid applications. Commercial NBBs are typically constructed in tubular designs, primarily because of their ease of sealing. However, planar designs are considered superior to tubular counterparts in terms of power output, cell packing, ease of assembly, and thermal management. In this paper, the performance of planar NBBs has been evaluated at an intermediate temperature. In particular, planar Na-NiCl<SUB>2</SUB> cells with different cathode loadings and thicknesses have been studied at 190 °C. The effects of the cathode thickness, charging current, and discharging power output on the cell capacity and resistance have been investigated. More than 60% of theoretical cell capacity was retained with constant discharging power levels of 200, 175, and 100 mW/cm<SUP>2</SUP> for 1x, 2x, and 3x cathode loadings, respectively. The cell resistance with 1x and 2x cathode loadings was dominated by ohmic resistance with discharging currents up to 105 mA/cm<SUP>2</SUP>, while for 3x cathode loading, it was primarily dominated by ohmic resistance with currents less than 66.67 mA/cm<SUP>2</SUP> and by polarization resistance above 66.67 mA/cm<SUP>2</SUP>.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Performance of planar Na-NiCl<SUB>2</SUB> cells was primarily limited by the charging current. </LI> <LI> Cells with 1x and 2x cathodes were dominated by ohmic resistance up to 105 mA/cm<SUP>2</SUP>. </LI> <LI> The cell with 3x cathode retained 27% of the capacity at a power output of 200 mW/cm<SUP>2</SUP>. </LI> </UL> </P>