已为您找到该学者20条结果 成果回收站
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
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.
-
89浏览
-
0点赞
-
0收藏
-
0分享
-
120下载
-
0
-
引用
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.
-
27浏览
-
0点赞
-
0收藏
-
0分享
-
36下载
-
0
-
引用
裴坚, A.-L. Dinga, J. Peib, Z.-K. Chenb, Y.-H. Laia, , W. Huangb, *
Thin Solid Films 363(2000)114-117,-0001,():
-1年11月30日
A novel conjugated polymer (PBBPTDEHP), which has a regioregular structure, was successfully synthesized in chloroform using FeCl3 as the oxidizing reagent. The polymer shows good thermal stability and can be easily dissolved in xylene, chloroform, tetrahydrofuran (THF) and other common organic solvents. Due to the symmetry of the monomer, the polymer formed contains no head-head conrgurational isomers and has high regioregular structure. The structure and the purity of the polymer were characterized by FTIR, 1H NMR, 13C NMR, MS, and elemental analysis. The absorption edge of the UV
Polymer light-emitting diodes, Photoluminescence, Polythiophene, Poly(, p-phenylene),
-
34浏览
-
0点赞
-
0收藏
-
0分享
-
106下载
-
0
-
引用
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
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.
-
40浏览
-
0点赞
-
0收藏
-
0分享
-
59下载
-
0
-
引用
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
Two series of novel alternating polyfluorene copolymers containing 10,15-dihydro-5Hdiindeno[ 1,2-R;1
-
62浏览
-
0点赞
-
0收藏
-
0分享
-
97下载
-
0
-
引用