Novel main-chain-conjugated poly(carbazol-alt-squaraine) and poly(dipyridyl-alt-squaraine) were successfully synthesized through direct polycondensation of 9-(2-ethylhexyl)carbazole-bridged or dipyridyl-bridged bispyr...Novel main-chain-conjugated poly(carbazol-alt-squaraine) and poly(dipyridyl-alt-squaraine) were successfully synthesized through direct polycondensation of 9-(2-ethylhexyl)carbazole-bridged or dipyridyl-bridged bispyrrole and squaric acid.The structures and properties of the polymers were characterized using ~1H NMR,FT-IR,UV-vis and cyclic voltammetry.Both polymers exhibit excellent solubility in common organic solvents and good thermal stability.Their UV-vis absorption spectra indicated the polymers have b...展开更多
A model for the size-dependent initial sintering temperature of ultrafine particles was established. The theoretical predictions for the size-dependent sintering temperatures of W, Ni and Ag ultrafine particles are co...A model for the size-dependent initial sintering temperature of ultrafine particles was established. The theoretical predictions for the size-dependent sintering temperatures of W, Ni and Ag ultrafine particles are consistent with available experimental展开更多
基金supported by the key foundation of education ministry of China(No.20070610053)Sichuan Province Foundation for Youths(No.2008JY0050)
文摘Novel main-chain-conjugated poly(carbazol-alt-squaraine) and poly(dipyridyl-alt-squaraine) were successfully synthesized through direct polycondensation of 9-(2-ethylhexyl)carbazole-bridged or dipyridyl-bridged bispyrrole and squaric acid.The structures and properties of the polymers were characterized using ~1H NMR,FT-IR,UV-vis and cyclic voltammetry.Both polymers exhibit excellent solubility in common organic solvents and good thermal stability.Their UV-vis absorption spectra indicated the polymers have b...
文摘A model for the size-dependent initial sintering temperature of ultrafine particles was established. The theoretical predictions for the size-dependent sintering temperatures of W, Ni and Ag ultrafine particles are consistent with available experimental
