权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

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型有机导体和超导体，这种新的分子设计是稳定分子金属的不稳定，如TTP（四硫富瓦伦）和TTP（四硫五烯）导体中所见。为此，设计并合成了新的π电子供体，其π电子系统与之前的TTF和TTP供体相比有所减少。研究人员对由此类π还原电子供体制备的导电自由基盐的结构和物理性质进行了研究，并发现了一种新的超导体，(DODHT)_2BF_4·H_2O。通过X射线衍射和磁化率测量研究了压力诱导超导体(DODHT)_2PF_6在环境压力下的绝缘相，绝缘体相是具有条带型电荷图案的电荷有序状态。此外，更精确地测量这种材料在压力下的输运特性，特别是在超导相和绝缘体相之间的边界周围，可以得到压力-温度相图；在相图中，超导状态和常阻状态在13 kbar压力以上共存，并且绝缘体相存在于13.2至15.1 kbar之间的超导相的正上方。由于在高达 8 kbar 的输运测量中观察到清晰的绝缘体转变，因此电荷排序绝缘体可能会分布在至少 8 kbar 的高压区域。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。通过研究分子导体，开发了多功能超分子材料及其在有机器件中的应用。对于此类材料，新制备了供体-受体连接分子，例如C_ 60 -TTF二联体，并且观察到与先前报道的C_ 60 -TTF系统不同的明显的分子内电荷转移相互作用。通过激发态的光物理研究发现C_ 60 -TTF二元组的光致电荷分离态的寿命极短，这对于诸如有机太阳能电池的有机器件是不利的。为了克服这种情况，制备了C_ 60 -TTF树枝状聚合物，尽管效率较低，但仍观察到了太阳能电池的性能。较少的

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）

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

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.

Photophysical Study of New Methanofullerene-TTF Dyads : An Obvious Intramolecular Charge Transfer in the Ground States.

新型亚甲基富勒烯-TTF 二元组的光物理研究：基态下明显的分子内电荷转移。

DOI：
发表时间：
2004
期刊：
J.Phys.Chem. A108(11)
影响因子：
0
作者：
H.Nishikawa;Y.Sato;K.Kikuchi;T.Kodama;I.Ikemoto;J.Yamada;H.Oshio;R.Kondo;S.Kagoshima;J.Yamada;J.Yamada;T.Mori;J.Yamada;J.Yamada;E.S.Choi;H.Imai;Y.Oshima;H.Nishikawa
通讯作者：
H.Nishikawa

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