Chun-Xue Yuan

Shandong University, Chi-nan-shih, Shandong Sheng, China

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Publications (9)29.5 Total impact

  • He Xi · Chun-Xue Yuan · Ye-Xin Li · Yang Liu · Xu-Tang Tao
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    ABSTRACT: Two Λ-shaped BODIPY dyes based on Tröger's base, 2,8-(6H,12H-5,11-methanodibenzo[b,f]diazocineylene)-di(4,4-difluoro-1,3,5,7-tetramethyl-4-bora-3a,4a-diaza-s-indacene) (DFTMB) and 2,8-(6H,12H-5,11-methanodibenzo[b,f]diazocineylene)-di(4,4-difluoro-2,6-diethyl-1,3,5,7-tetramethyl-4-bora-3a,4a-diaza-s-indacene) (DFDEB), were designed and synthesized. Both compounds exhibit intense fluorescence in dilute solution and polycrystalline powder form. From the crystal structure, the impact of the substitutions at the BODIPY core on the crystal packing mode, intermolecular π–π interactions and optical behavior is compared and discussed. The results indicate that the close π–π stacking in the crystalline state has been effectively inhibited by the twisted Λ-shaped Tröger's base.
    No preview · Article · Feb 2012 · CrystEngComm
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    Chun-Xue Yuan
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    ABSTRACT: In the title compound, C(51)H(56)B(2)N(2), a substituted Tröger's base, the dihedral angle between the two benzene rings constituting the Tröger's base framework is 104.42 (6)°. The crystal structure is stabilized by C-H⋯π and weak C-H⋯N inter-actions.
    Preview · Article · Jan 2012 · Acta Crystallographica Section E Structure Reports Online
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    ABSTRACT: Two X-shaped compounds (7 and 9) based on pyrene have been synthesized and well characterized. These compounds exhibit good thermal stabilities and high fluorescence yields. In addition, an interesting phenomenon is discovered that the fluorescence of compound 9 can be reversibly converted from red to orange in the solid state. Organic light-emitting diodes have been fabricated using the X-shaped compounds as the host emitter with low turn-on voltage up to 2.35 V. The device based on compound 7 exhibits orange-red electroluminescence (CIE: 0.58, 0.42) with a maximum luminance of 4798.4 cd/m2, a maximum current efficiency 1.26 cd/A, and a power efficiency of 1.06 l m/W.Highlights► Two X-shaped compounds based on pyrene are designed, synthesized, and characterized. ► Balancing the relationship between fluorescent enhancement and charge carrier. ► The fluorescence of compound 9 can be reversibly converted from red to orange. ► The device based on compound 7 exhibits better EL performances.
    No preview · Article · Aug 2011 · Synthetic Metals
  • Ye-Xin Li · Zuo-Qin Liang · He Xi · Lu-Lu Ma · Tao He · Chun-Xue Yuan · Xu-Tang Tao
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    ABSTRACT: Research on structure-property relationships in distyrylarylene derivatives is far behind their wide applications in optoelectronic devices due to the absence of crystal structure information. Herein, the single crystals of 4,4'-bis(2-thienylvinyl)biphenyl (1) and 4,4'-bis(2-thieno[3,2-b]thienylvinyl)biphenyl (2) were successfully grown by the vapor transport method. Both molecules adopt the typical herringbone packing motif. However, the intermolecular C-H⋅⋅⋅π interaction in compound 2 is much stronger than that in compound 1. The correlations of interchain interaction with film morphology, optical and electronic properties were studied. Compound 2 formed higher crystalline films with (001) and (111) orientations. The organic field-effect transistor properties of both materials were investigated. Compound 2 showed better performance with a hole mobility higher than 0.01 cm(2)  V(-1)  s(-1) and an on/off current ratio over 10(6) . These results reveal that the intensity of C-H⋅⋅⋅π interactions can exert dramatic influences on the optical and electronic properties of distyrylarylene-based materials.
    No preview · Article · Feb 2011 · ChemPhysChem
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    ABSTRACT: A new two-photon absorption compound, 2-{4-[(dicyanomethylidene-5,5-dimethylcyclohexl)vinyl]phenyl}imidazo[4,5-f][1,10]phenanthroline (DDVPIP), was synthesized and characterized. Its two-photon absorption (TPA) cross-section is obtained as 62GM (1GM=1×10−50cm4photon−1molecule−1) with 200fs laser pulses at 800nm. The one-photon excited fluorescence (OPEF) and two-photon excited fluorescence (TPEF) of DDVPIP are sensitive to the acid/base of the solution, which are enhanced in the basic solution but weakened in acidic solution. Charge-transfer (CT) states of DDVPIP were calculated through theory methods to explain its acid–base-sensitive fluorescent properties.
    No preview · Article · Feb 2011 · Synthetic Metals
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    ABSTRACT: Two luminescent materials based on indolo[3,2-b]carbazole have been designed and synthesized. They were highly fluorescent both in solution and in the solid state. High-performance electroluminescent devices with indolo[3,2-b]carbazole luminescent derivatives as the emissive materials were fabricated for the first time with low turn-on voltage of 2.65V, high luminescence efficiency of 7.92lmW−1, and high brightness of 68729cdm−2. The results demonstrated that indolo[3,2-b]carbazole has great potentials as promising building block for highly efficient electroluminescent materials.
    No preview · Article · Aug 2009 · Organic Electronics
  • Chun-Xue Yuan · Xu-Tang Tao · Lei Wang · Jia-Xiang Yang · Min-Hua Jiang
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    ABSTRACT: The lambda (Λ)-shaped pyridinium salts 2,8-(6H,12H-5,11-methanodibenzo[b,f]diazocineylene)-di(p-ethenyl-N-methylpyridinium) ditosylate (DMDPS), 2,8-(6H,12H-5,11-methanodibenzo[b,f]diazocineylene)-di(p-ethenyl-N-methylpyridinium) diiodide (DMDPI), and 2,8-(6H,12H-5,11-methanodibenzo[b,f]diazocineylene)-di(p-ethenyl-N-methylpyridinium) dinitrate (DMDPN) based on Tröger’s base exhibit a typical aggregation-induced emission (AIE) behavior that it is virtually nonemissive in solution but highly luminescent in the aggregate state. The possibility of utilizing the AIE effect for protein detection and quantification is explored by using bovine serum albumin (BSA) as a model protein. These bioprobes undergo a large spectral change upon binding to BSA, which can be determined by fluorometry. Furthermore, the plots of photoluminescence intensity versus BSA concentration (0−70 μg/mL) display a good linear relationship, indicating quantitative fluorimetric protein detection may be achieved.
    No preview · Article · Apr 2009 · The Journal of Physical Chemistry C
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    ABSTRACT: Three new compounds based on indolo[3,2-b]carbazole,2,8-bis(4-diphenylaminophenyl)-5,11-di-n-octylindolo[3,2-b]carbazole (BTOICZ), 2,8-bis(9,9′-di-n-butylfluorenyl)-5,11-di-n-octylindolo[3,2-b]carbazole (BFOICZ) and 2,8-bis[N-(n-butyl)carbazolyl]-5,11-di-n-octylindolo[3,2-b]carbazole (BCOICZ), as hole-transporting materials have been synthesized by Suzuki coupling reaction. The effects of substituents on the optical, thermal and electrochemical properties of indolo[3,2-b]carbazole derivatives have been studied carefully. Electroluminescent (EL) devices using these compounds as hole-transporting layer in combination with Alq3 as electron-transporting and emitting layer have been fabricated and characterized. The devices based on BTOICZ or BFOICZ showed green emission at 526nm, while the device based on BCOICZ emitted very weak light. The turn-on voltages are 4.1 and 5.4V for BTOICZ and BFOICZ, respectively. The maximal luminance efficiencies are 0.738 and 0.767lm/W for BTOICZ and BFOICZ, respectively. The difference of the EL performances of these compounds reveals that the substituent effects have great effect on the hole-transporting performance of the indolo[3,2-b]carbazole-based compounds.
    No preview · Article · Dec 2007 · Organic Electronics
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    ABSTRACT: A novel Λ-shaped pyridinium salt 2,8-(6H,12H-5,11-methanodibenzo[b,f]diazocineylene)-di(p-ethenyl-N-methyl-pyridinium) ditosylate (abbreviated as DMDPS) based on Tröger's base was designed, synthesized and characterized. DMDPS exhibits a typical aggregation-induced emission (AIE) behavior that is virtually nonemissive in solution but highly luminescent in solid state. The difference between the structure and the optical properties of DMDPS and 1,4-phenyl-di(p-ethenyl-N-methyl-pyridinium) ditosylate (abbreviated as DPPS) are analyzed and compared. It is concluded that the loose stacking caused by twisted molecular configuration could reduce the distance-dependent intermolecular quenching effect to produce intense fluorescence in the aggregation state while the enantiomerization and/or the intramolecular vibrational motion which induce the nonradiative deactivation process could cause fluorescence quenching in the solution. As a water-soluble AIE-active material, DMDPS would have potential application in the area of optical and biological research.
    No preview · Article · Aug 2007 · The Journal of Physical Chemistry C