Bis(ethylenedioxy)tetrathiafulvalene: the first oxygen-substituted tetrathiafulvalene
Bis(ethylenedioxy)tetrathiafulvalene: the first oxygen-substituted tetrathiafulvalene
复制标题
双(乙撑二氧基)四硫富瓦烯：第一个氧取代的四硫富瓦烯
DOI：
10.1021/ja00190a079
复制
发表时间：
1989
影响因子：
15
通讯作者：
F. Wudl
中科院分区：
文献类型：
--
作者：
T. Suzuki;H. Yamochi;G. Srdanov;K. Hinkelmann;F. Wudl
1-四硫富瓦烯（TTF）及其衍生物由于其氯化物盐的高导电性而成为制备有机金属和超导体的重要供体。在TTF家族中，有机金属态可以用未取代的和各种取代的硫、S 'enium和碲杂环来实现，但到目前为止，超导体只能用类似于四甲基四硒富瓦烯和双（亚乙基二硫代）四硫富瓦烯（BEDT-TTF，又名“ET”）的衍生物来实现。2有机超导体的最高记录超导转变温度是（BEDT-TTF-1/8）2Cu（NCS）2的rc= 11.2 K 3，Saito的小组4预先报道质子样品的Tc= 10.4 K。虽然这些温度大大低于无机陶瓷、氧化铜基超导体的温度（125 K），5但有机超导体转变温度随时间上升的速率仍然相当可观[（TMTSF）2 PF 6，1980年为0.9 K/25 kbar 6（BEDT-TTF-< f8）2Cu（SCN）2，11.2 K/1 bar，19883· 4]。氧化铜超导体的发现引发了固态科学出版物的爆发，激发了许多理论家提出，在这些固体中负责混合价态的化学物质不是铜对（Cu'VCu 111），而是基本上是氧自由基阳离子（“氧上的空穴”）。8有些人甚至认为，
Since the discovery of the highconductivity of its chloride salt, 1 tetrathiafulvalene (TTF) and all itsderivatives have become the most investigated donors for the generation of organic metals and superconductors. In the TTFfamily, the organic metallic state can be achieved with the unsubstituted and variously substituted sulfur, S'enium, and tellurium heterocycles but the supercon-ducting ate can, so far, be achieved only with derivatives akin to tetramethyltetraselenafulvalene and bis (ethylenedithio) tetrathiafulvalene (BEDT-TTF, aka “ET”). 2 The highest recorded superconducting transition temperature for an organic super-conductor is rc= 11.2 K3 for (BEDT-TTF-í/8) 2Cu (NCS) 2, pre-viously reported by Saito’s group4 as Tc= 10.4 K for the protio sample. While these temperatures are considerably lower than those of the inorganic ceramic, copper oxide based, supercon-ductors (125 K), 5 the rate at which the organic superconductor transition temperatures have been rising with time is still quite impressive [(TMTSF) 2PF6, 0.9 K/25 kbar in 19806 (BEDT-TTF-< f8) 2Cu (SCN) 2, 11.2 K/1 bar in 19883· 4]. The eruption in solid statescience publications caused by the discovery of the copper oxide superconductors7 has inspired a number of theorists to suggest that the chemical species responsible for the mixed valence in these solids is not the copper couple (Cu'VCu111) but essentially oxygenradical cations (“holes on oxygen”). 8 Some have gone as far as suggesting that results of