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Pursuit of Synthesis and Functionality of the Materials Exhibiting Visible Fastener Effect

追求具有可见紧固件效果的材料的合成和功能

基本信息

批准号：
05640651
负责人：
OHTA Kazuchika
金额：
$ 1.34万
依托单位：
Shinshu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05640651/
关键词：
Fastener Effect Discotic Liquid Crystals Glyoximato Metal Complexes ファスナー効果

项目摘要

The author investigated influences of the central metals and the surrounding long chains on mesomorphism and thermochromism of the various long chainsubstituted bis (diphenylglyoximato) metal complexes. It was revealed that these long chain-substituted bis (diphenylglyoximato) metal complexes exhibit not only the mesomorphic properties but also thermochromism caused by "fastener effect". The kinds and numbers of the long chains influence not only mesomorphic structures but also the appearance of thermochromism. It was revealed that the one-dimensional metal stacking structure crucially influences thermochromism. It was found that the value of "apparent pressure" is 0.87GPa for the (C_<12>O) _8-Pt complex at 35ﾟC,and that the fastener effect by the surrounding long chains attains to a saturated plateau for n<greater than or equal>12 in the series of the (C_nO) _8-Pt complexes. The (C_<12>O) _8-Pt complex which has the bulkiest ligand and the smallest metal ion exhibits the most drastic thermochromism among the (C_<12>O) _8-M complexes for M=Ni, Pd, Pt. It was confirmed that this thermochromism is caused by blue-shift of the ndz^2- (n+1) pz band of the M^<2+> ion. Such visible fastener effect is the first examples, so far as we know. This must be the new frontiers of application of liquid crystalline organic metal complexes (metallomesogen). In addition, we can expect to obtain high electronic conductivities by such "fastener effect" at atmospheric pressure even for the compounds exhibiting high conductivities only under high pressure.

研究了中心金属和周围长链对各种长链取代的双（二苯基乙醛肟）金属配合物介晶性和热色性的影响。结果表明，这些长链取代的双（二苯基乙醛酸）金属配合物不仅具有介晶性质，而且还具有由“扣件效应”引起的热致变色性。长链的种类和数目不仅影响液晶的结构，而且影响热致变色的外观。结果表明，一维金属堆叠结构是影响热致变色性的关键。结果表明，（C_<12>nO）_8-Pt配合物在35 ℃时的“表观压力”为0.87GPa，在（C_nO）_8-Pt配合物系列中，当n = 12时，周围长链的扣件效应达到一个饱和平台<greater than or equal>。（C_<12>O）_8-M配合物（M=Ni，Pd，Pt）中，（C_ O）_8-Pt配合物具有最大的配体和最小的金属离子，表现出最强烈的热色性<12>。证实了这种热色性是由M^<2+>离子的ndz^2-（n+1）pz带的蓝移引起的。据我们所知，这种可见的紧固件效应是第一个例子。这将是液晶有机金属配合物（金属介晶）应用的新领域。此外，即使对于仅在高压下表现出高电导率的化合物，我们也可以期望通过这种“紧固件效应”在大气压下获得高的电子电导率。