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1973年,Walatka,Labes和Perlstein发现聚合的(SN)_x晶体是金属性的材料,而不是如先前确信的半导体。从此,又激起了导电聚合物复兴的热潮。1975年,当着发现(SN)_x在低于0.3K表现出超导性时,化学家就尝试用各种合成路线来得到类似的化合物。遗憾地是,他们的努力没有赢得成功的结果,(SN)_x仍然是仅有的本征金属性的合成聚合物。但到1977年发现了各种卤素,特别是Br_2可以进入(SN)_x晶格并引起它的室温电导率增加一个数量级,而不改变其超导转折点。同年晚些时候,
In 1973, Walatka, Labes and Perlstein found that polymerized (SN) _x crystals are metallic materials rather than semiconductors as previously believed. Since then, it has aroused the revival of conductive polymer craze. In 1975, when it was discovered that (SN) _x showed superconductivity below 0.3K, chemists tried various synthetic routes to obtain similar compounds. Unfortunately, none of their efforts resulted in a successful outcome, and (SN) _x remains the only intrinsic metallic synthetic polymer. However, a variety of halogens were discovered in 1977, and in particular, Br 2 can enter the (SN) _x lattice and cause its room temperature conductivity to increase an order of magnitude without changing its superconducting turning point. Later that same year,