合成并表征了一系列不同的共轭长度的扭曲和多稠合的芳族四苯并并苯衍生物。X射线衍射揭示了扭曲的分子形状以及这些分子的堆积排列。因此,取决于它们的共轭长度,未取代的四苯并并并苯显示出偏移的或完美的面对面π堆积。这些四苯并并苯并呋喃的单晶用作制造场效应晶体管(SCFET)的导电通道。四苯并四苯(TBT)表现出最高的迁移率,接近0.81 cm 2 V -1 s -1(平均0.64 cm 2 V -1 s -1)在这些分子中。相比之下,理论计算表明四苯并辛并茂(TBO)晶体具有大面积,面对面π堆积,并且在该系列中具有最高的分子间偶联。观察到的较低的电荷迁移率(平均0.32 cm 2 V -1 s -1,最高0.55 cm 2 V -1 s -1)被合理化,这是由于在TBO中存在可比的电子耦合和重组能而导致了离域极化子形成的可能。,得到了蒙特卡洛模拟的支持,并考虑了这种离域效应。
合成并表征了一系列不同的共轭长度的扭曲和多稠合的芳族四苯并并苯衍生物。X射线衍射揭示了扭曲的分子形状以及这些分子的堆积排列。因此,取决于它们的共轭长度,未取代的四苯并并并苯显示出偏移的或完美的面对面π堆积。这些四苯并并苯并呋喃的单晶用作制造场效应晶体管(SCFET)的导电通道。四苯并四苯(TBT)表现出最高的迁移率,接近0.81 cm 2 V -1 s -1(平均0.64 cm 2 V -1 s -1)在这些分子中。相比之下,理论计算表明四苯并辛并茂(TBO)晶体具有大面积,面对面π堆积,并且在该系列中具有最高的分子间偶联。观察到的较低的电荷迁移率(平均0.32 cm 2 V -1 s -1,最高0.55 cm 2 V -1 s -1)被合理化,这是由于在TBO中存在可比的电子耦合和重组能而导致了离域极化子形成的可能。,得到了蒙特卡洛模拟的支持,并考虑了这种离域效应。
NOVEL ORGANOMETALLIC COMPLEXES WHICH EMIT IN THE RED TO GREEN SPECTRAL REGION AND THEIR USE IN OLEDS
申请人:BASF SE
公开号:US20130231489A1
公开(公告)日:2013-09-05
Organometallic complexes which bear at least one ligand which has a unit having a triplet energy of at least 22 000 cm
−1
, a process for preparing the organometallic complexes, a mixture comprising at least one inventive organometallic complex, the use of the organometallic complexes or of the mixture in organic light-emitting diodes, the organometallic complexes preferably being used as emitter materials, and specific nitrogen- or phosphorus-substituted triphenylene derivatives and a process for their preparation.
A method for preventing deposition of polymer scale and a coating agent therefor
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:EP0126991A1
公开(公告)日:1984-12-05
The invention provides a method for preventing deposition of polymer scale on the reactor walls in the polymerization of an ethylenically unsaturated monomer, in particular, by emulsion polymerization. The method comprises coating the reactor walls with a coating composition containing, as the essential components, (A) an organic compound having at least 5 conjugated π bonds in a molecule, (B) a chelating agent and (C) a metal compound capable of producing metal ions having a coordination number of at leas 2 which presumably forms a metallic chelate compound with the chelating agent contributing to the formation of a strongly adsorbed layer on the reactor walls. The coating composition may be further admixed with a silicic acid compound such as a colloidal silica.
Plieninger,H. et al., Chemische Berichte, 1963, vol. 96, p. 1610 - 1617
作者:Plieninger,H. et al.
DOI:——
日期:——
METHOD FOR IDENTIFYING MOLECULAR STRUCTURE
申请人:THE UNIVERSITY OF TOKYO
公开号:US20200096461A1
公开(公告)日:2020-03-26
The present invention provides a novel method for identifying a molecular structure by single crystal X-ray analysis. A single crystal that gives an X-ray diffraction spectrum sufficient for determining the structure of the molecule can be efficiently obtained by including a test molecule in a metal complex and then crystallizing the test-molecule-including metal complex. By analyzing this single crystal by X-ray analysis, it is possible to determine the structure of the test molecule without obtaining a single crystal of the test molecule. With the method according to the present invention, the structure of a test molecule in a trace amount of sample can also be determined.