Development of organic superconductors and multifunctional supramolecules based on new π-elecfron systems

基于新型π电子体系的有机超导体和多功能超分子的发展

基本信息

批准号：
15550127
负责人：
NISHIKAWA Hiroyuki
金额：
$ 2.24万
依托单位：
University of Tsukuba (2004)Tokyo Metropolitan University (2003)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

In this research project, development of new organic conductors and superconductors based on new molecular design that is destabilization of stable molecular metals as seen in TTP(tetrathiafulvalen) and TTP(tetrathiapentalene) conductors has been conducted. For this purpose, new π-electron donors whose π-electron systems are reduce compared with those of the previous TTF and TTP donors have been designed and synthesized. Structures and physical properties of the conducting radical salts prepared from such π-reduced electron donors have been investigated and a new superconductor, (DODHT)_2BF_4・H_2O, was discovered. By investigating the insulating phase at ambient pressure of the pressure-induced superconductor, (DODHT)_2PF_6, by X-ray diffraction and magnetic susceptibility measurements, the insulator phase was a charge ordering state with stripe type charge pattern. Furthermore, measurement of the transport properties of this material under pressure more precisely, particularly around … More the boundary between superconducting and insulator phases, leads to the pressure-temperature phase diagram ; In the phase diagram, the superconducting and normal resistive states coexists above the pressure of 13 kbar, and the insulator phase exists immediately above the superconducting phase between 13.2 and 15.1 kbar. Because the clear insulator transition was observed in the transport measurement up to 8 kbar, the charge ordering insulator might spread over high pressure region at least 8 kbar. These results suggested that the charge fluctuation might be crucial to the superconductivity in this material and the present material will seive as a simple tool for the investigation of the universality of the interplay between superconductivity and charge fluctuation.With studying the molecular conductors, development of multifunctional supuramolecular materials and their application to the organic devices have been carried out. For such materials, donor-acceptor linked molecules, such as C_<60>-TTF dyads, were newly prepared and an obvious intramolecular charge transfer interaction was observed unlike the previously reported C_<60>-TTF systems. The life time of the photo-induced charge separated state of the C_<60>-TTF dyad was revealed to be extremely short by the photo-physical study of the excited states, which is disadvantageous for the organic devices such as an organic solar cell. In order to overcome this situation, C_<60>-TTF dendrimers were prepared and the solar cell property was observed in spite of the low efficiency. Less

在这个研究项目中，基于新的分子设计开发了新的有机导体和超导体，这种设计使稳定的分子金属不稳定，如 TTP（四硫富瓦烯）和 TTP（四硫五烯）导体。为此，已经进行了新的 π 电子供体。设计并合成了由其制备的导电自由基盐的结构和物理性质。通过X射线衍射和磁力研究压力诱导超导体(DODHT)_2PF_6在环境压力下的绝缘相，研究了π还原电子供体并发现了一种新的超导体(DODHT)_2BF_4・H_2O。磁化率测量中，绝缘体相呈带状电荷模式的电荷有序状态。此外，更精确地测量了该材料在压力下的输运特性。围绕超导相和绝缘体相之间的边界，得出压力-温度相图；在相图中，在13 kbar压力以上，超导态和常阻态同时存在，绝缘体相紧邻超导相之间的上方。 13.2 和 15.1 kbar 由于在高达 8 kbar 的传输测量中观察到明显的绝缘体转变，因此电荷排序绝缘体可能会扩散到高压区域。这些结果表明，电荷波动可能对该材料的超导性至关重要，并且本材料将作为研究超导性和电荷波动之间相互作用的普遍性的简单工具。导体，多功能超分子材料的开发及其在有机器件中的应用已经进行。对于此类材料，新制备了诸如C_ 60 -TTF二元组的供体-受体连接分子。与之前报道的C_ 60 -TTF系统不同，观察到明显的分子内电荷转移相互作用。光诱导的C_ 60 -TTF二元组的光致电荷分离状态的寿命被揭示为极短。为了克服这种情况，制备了C_ 60 -TTF树枝状聚合物，并观察了太阳能电池的性能，尽管其性能较低。效率.更少

项目成果

期刊论文数量（64）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Structure and properties of radical salts of DODHT derivatives

DODHT衍生物自由基盐的结构和性质

DOI：
发表时间：
2003
期刊：
Synthetic Metals 137
影响因子：
0
作者：
J.Yamada;H.Akutsu;H.Nishikawa;K.Kikuchi;H.Nishikawa et al.;M.Umemiya et al.;J.Yamada et al.;T.Kodama et al.;H.Nishikawa et al.;H.Nishikawa et al.;H.Nishikawa et al.
通讯作者：
H.Nishikawa et al.

Crystal structures and physical properties of new Ni complexes with dihydro-TTF dithiolate

新型镍与二氢-TTF二硫醇配合物的晶体结构和物理性质

DOI：
发表时间：
2003
期刊：
Synth.Met. 135-136
影响因子：
0
作者：
K.Yokoyama;H.Nishikawa;K.Kikuchi;T.Kodama;I.Ikemoto;J.Yamada
通讯作者：
J.Yamada

Crystal structure and physical properite of (DODHT)_2FeCl_4

(DODHT)_2FeCl_4的晶体结构和物理性质

DOI：
发表时间：
期刊：
Polyhedron (in press)
影响因子：
0
作者：
H.Yoshino;K.Murata;K.Saito;H.Nishikawa;K.Kikuchi;I.Ikemoto;K.Masunaga et al.;H.Nishikawa et al.
通讯作者：
H.Nishikawa et al.

A new organic superconductor, β(BDA-TTP)_2GaCl_4 [BDA-TTP=2,5-(1,3-dithian-2-ylidene)-1,3,4,6-tetrathiapentalene]

一种新型有机超导体β(BDA-TTP)_2GaCl_4 [BDA-TTP=2,5-(1,3-二硫基-2-亚基)-1,3,4,6-四硫五环烯]

DOI：
发表时间：
2003
期刊：
Chem.Commun.
影响因子：
0
作者：
J.Yamada;T.Toita;H.Akutsu;S.Nakatsuji;H.Nishikawa;I.Ikemoto;K.Kikuchi;E.S.Choi;D.Graf;J.S.Brooks
通讯作者：
J.S.Brooks

New organic conductor (DMET)_2CuCl_2 : Synthesis, structure and physical properties

新型有机导体(DMET)_2CuCl_2：合成、结构和物理性质