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2006年07月26日

【期刊论文】Star-Shaped Polycyclic Aromatics Based on Oligothiophene-Functionalized Truxene: Synthesis, Properties, and Facile Emissive Wavelength Tuning

裴坚, Jian Pei, * Jin-Liang Wang, Xiao-Yu Cao, Xing-Hua Zhou, and Wen-Bin Zhang

J. AM. CHEM. SOC. 2003, 125, 9944-9945,-0001,():

-1年11月30日

摘要

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2006年07月26日

【期刊论文】Single-Molecule Nanosized Polycyclic Aromatics with Alternant Five- and Six-Membered Rings: Synthesis and Optical Properties

裴坚, Wei Zhang, Xiao-Yu Cao, Hong Zi, and Jian Pei*

Org. Lett., Vol. 7, No.6, 2005, 959-962,-0001,():

-1年11月30日

摘要

A synthetic protocol for a novel family of symmetric polycyclic aromatics with a benzene or cyclooctatetraene (COT) ring as the core and alternant fused benzene and cyclopentadiene rings as branches has been developed. The TiCl4-promoted cyclizations construct both planar trimers and tubelike tetramers via the "in situ" generation of the benzene or COT skeleton. The structures of 6b, 7a, 7b, and 10 have been characterized by 1H and 13C NMR spectra and MALDI-TOF mass spectroscopy. These polycyclic aromatics also exhibit interesting optical properties.

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2006年07月26日

【期刊论文】Novel Blue-Light-Emitting Truxene-Containing Hyperbranched and Zigzag Type Copolymers: Synthesis, Optical Properties, and Investigation of Thermal Spectral Stability

裴坚, Xiao-Yu Cao, Xing-Hua Zhou, Hong Zi, and Jian Pei*

Macromolecules 2004, 37, 8874-8882,-0001,():

-1年11月30日

摘要

Two series of novel alternating polyfluorene copolymers containing 10,15-dihydro-5Hdiindeno[ 1,2-R;1

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2006年07月27日

【期刊论文】New Series of Blue-Light-Emitting Polymers Constituted of 3-Alkylthiophenes and 1,4-Di(1,3,4-oxadiazolyl)phenylene

裴坚, Wei Huang, * Wang-Lin Yu, Hong Meng, Jian Pei, and Sam Fong Yau Li

Chem. Mater. 1998, 10, 3340-3345,-0001,():

-1年11月30日

摘要

A new series of conjugated polymers constituted of 3-alkylthiophenes and 1,4-di(1,3,4-oxadiazolyl)phenylene are synthesized through precursor polymers of polyhydrazides. The solubility of the precursor polymers and the corresponding target polymers is improved by increasing the length of side chains on thiophene rings, which results in a higher degree of the conversion from the precursors to the final polymers and thus results in longer effective conjugated length in the polymers bearing longer side chains. The thermal stability and electrochemical properties of the polymers are studied. The polymers emit blue light under the irradiation of UV light in their film states. The relative fluorescence yield in solutions increases with the increase in length of side chains on thiophene rings in the polymers and reaches up to 79% for the polymer bearing octyl side chains. The possibility of polymers being used as electroluminescent material in polymer light-emitting diodes (PLEDs) is demonstrated by the successful fabrication of a single-layer device of indium tin oxide (ITO)/polymer/Ca, which emits visible blue light above 8 V of forward bias.

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2006年07月27日

【期刊论文】New efficient blue light emitting polymer for light emitting diodes

裴坚, Wang-Lin Yu, ab, Jian Pei, Yong Cao, bc, Wei Huang*a, and Alan J. Heeger*bc

Chem. Commun., 1999, 1837-1838,-0001,():

-1年11月30日

摘要

The synthesis, by the Suzuki coupling reaction, of a novel soluble blue light emitting polymer, poly{(9,9-dihexyl-2,7-fluorene-alt-co-[2,5-bis(decyloxy)-1,4-phenylene]}(PDHFDDOP) is reported. PDHFDDOP exhibits photoluminescence (PL quantum efficiency of 40% in neat films) and electroluminescence (EL) with deep blue emission.

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    北京大学,北京

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