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裴坚, Teck-Peng Loh, * Jian Pei, Kevin Siong-Ve Koh, Guo-Qiang Cao and Xu-Ran Li
Received in UK 18 March 1997; accepted 26 March 1997, 3465-3468,-0001,():
-1年11月30日
Studies on the effects of water and the binding characteristic of InCl3 in the Mukaiyama-aldol reaction with an in depth mechanistic probe on the probable internal pressure and aggregation effects exerted in this media.
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【期刊论文】Exploiting an Imidazole-Functionalized Polyfluorene Derivative as a Chemosensory Material
裴坚, Xing-Hua Zhou, Ji-Chao Yan, and Jian Pei*
Macromolecules 2004, 37, 7078-7080,-0001,():
-1年11月30日
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裴坚, Wang-Lin Yua), Yong Cao, Jian Peia) and Wei Huangb), Alan J. Heegerc),
Appl. Phys. Lett., Vol. 75, No.21, 22 November 1999, 3270-3272,-0001,():
-1年11月30日
Deep blue photoluminescence and electroluminescence are demonstrated from a soluble conjugated polymer, poly (9,9-dihexylfluorene-alt-co-2,5-didecyloxy-para-phenylene). The PL quantum efficiency is approximately 40%. Cyclic voltammetry measurements indicate that the highest occupied molecular orbital and lowest unoccupied molecular orbital energies are 5.66 and 2.62 eV below vacuum, respectively. Single-layer and multilayer light-emitting diodes emit deep blue light (peak at; 420nm).
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裴坚, Wei Huang, *, Hong Meng, Wang-Lin Yu, Jian Pei, Zhi-Kuan Chen, and Yee-Hing Lai†
Macromolecules 1999, 32, 118-126,-0001,():
-1年11月30日
A new series of p-n diblock conjugated copolymers consisting of alternate 1,4-bis- (oxadiazolyl)-2,5-dialkyloxybenzene and oligothiophenes with one to three thiophene rings (P1-P3) have been synthesized. The polymers have well-defined structures and exhibit good thermal stability with the onset decomposition temperatures in nitrogen at around 300℃. The glass transition temperature (Tg) of the polymers decreases with increasing the length of oligothiophene blocks. Both the absorption spectra and photoluminescence spectra shift to longer wavelength with increase in the length of oligothiophene blocks. The emissive color of the polymers could be tuned from blue to green to orange just by increasing the number of thiophene rings in the oilgothiophene blocks from one to three. No obvious change in reduction potential is found for the polymers with variation in the length of oligothiophene blocks. The reduction potential E1/2 of the polymers is measured by cyclic voltammetry to be around -1.7V vs SCE, comparable to those of poly(cyanoterephthalyidene) (CN-PPV) and other good electron-transporting materials. The oxidation potential of the polymers can be reduced remarkably by increasing the length of oligothiophene blocks. The oxidation potential E1/2 of P3 is measured to be 1.25V with the onset potential at 1.0V vs SCE. These values are comparable to those of some hole-injection favorable electroluminescent polymers. The results prove that the p-n diblock structure may be a promising molecular design for synthetically tuning the HOMO and LUMO of conjugated polymers.
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【期刊论文】A Novel Improved Procedure for the Synthesis of Oxazoles
裴坚, Wei Huang, a, b, *, Jian Pei, Bingzi Chen, Weiwei Pei*, and Xiulin Yea
Received in China 21 March 1996; revised 23 April 1996; accepted 24 May 1996, 10131-10136,-0001,():
-1年11月30日
In the present work a novel improved and convenient procedure for the synthesis of oxazoles has been developed. Acetamide, instead of ammonium acetate, was used to react with phenacyl benzoates in boiling xylene in the presence of BF3/Et2O as the catalyst. According to this new synthetic route, nine oxazole compounds were readily prepared as single products in reasonably high yields. On the basis of the experimental results, a plausible mechanism of this reaction is proposed. Copyright
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