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Bai Q.-L.,Dalian University of Technology | Bai Q.-L.,Inner Mongglia University for Nationalities | Zhang C.-H.,Inner Mongglia University for Nationalities | Cheng C.-H.,Dalian University of Technology | And 3 more authors.
Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica | Year: 2011

α(β)-tetra-(methoxy-phenoxy)-zinc phthalocyanine are synthesized by employing 3(4)- nitrobenzene-1,2-dicarbonitrile as precursors. They are characterized by spectrum methods and elemental analysis. The UV-Vis spectrum, photoluminescence spectra of spin-coated film and solid pellet are compared. The electroluminescent devices are fabricated by using spin coating. The results indicate that the fluorescence of solid phthalocyanine has a red-shift of more than 145 nm compared to that in solution. The fluorescences are broader in solid state than that in solution. The fluorescence of β-substituted phthalcyanines has a more red-shift than α-substituted phthalcyanines. The electroluminescent spectra around 856 and 862 nm are consisted with the photoluminescence spectra of spin-coated film. The shorter inter-molecule space leads to the large red-shift of the fluorescence. © Editorial office of Acta Physico-Chimica Sinica. Source

Bai Q.,Dalian University of Technology | Zhang C.,Inner Mongglia University for Nationalities | Cheng C.,Dalian University of Technology | Li W.,Jilin University | And 2 more authors.
Chinese Journal of Chemistry | Year: 2012

A new soluble phthalocyaine 1(4),8(11),15(18),22(25)-tetra-(methoxy- phenoxy)phthalocyanine (MPPc) was synthesized and verified by mass spectrum (MS), 1H NMR, IR and elemental analysis. The methoxy-phenoxy groups were introduced in order to enhance the solubility of the phthalocyanine. The photophysical and electroluminescent properties were investigated. The organic light-emitting diodes (OLEDs) with the structure of ITO/PVK:MPPc(40 nm)/BCP(20 nm)/Alq 3(30 nm)/Al were fabricated. Room-temperature near infrared (NIR) electroluminescence (EL) was observed near 891 nm that effectively covered the first optical communication window near 850 nm. © 2012 SIOC, CAS, Shanghai, & WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

Bai Q.,Dalian University of Technology | Bai Q.,Inner Mongglia University for Nationalities | Zhang C.,Inner Mongglia University for Nationalities | Cheng C.,Dalian University of Technology | And 3 more authors.
Acta Chimica Sinica | Year: 2011

With 3-nitrobenzene-1, 2-dicarbonitrile and 4-nitrobenzene-1, 2-dicarbonitrile as raw materials, α- and β-tetrakismethoxyphenoxy phthalocyaninatozinc were synthesized via two-step reaction. The structure of two compounds were characterized by IR, UV-Vis, MS, 1H NMR spectra and elemental analysis, and the results are consistent with the structures of title compounds. Two phthalocyanine compounds have good solubility in organic solvents. The energy band structures and electrochemical processes were studied by cyclic voltammetry. The results indicated the phthalocyanine monomer has higher HOMO energy levels, lower LUMO energy levels and more narrow band gap when the methoxyphenoxy lies on α-site than on β-site, which are favorable for the electron transfer of phthalocyanine molecules. The results showed that the electrochemical processes of two compounds were all quasi-reversible single-electron processes in dichloromethane, and the oxidation-reduction reactions occurred in phthalocyanine ring. Finally, the electrochemical reaction mechanism of two phthalocyanine compounds were put forward. Source

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