茚并芴系列的三种双(重氮)化合物,11,12-双(重氮)-11,12-二氢茚并[2,1- a ]芴(1b),10,12-双(重氮)-10,已经制备并通过电化学引发分解了12-二氢茚并[2,1- b ]芴(2b)和6,12-双(重氮)-6,12-二氢茚并[1,2- b ]芴(3b)。链过程在二甲基甲酰胺溶液中进行。如此获得的黑色溶液显示出单线esr光谱,电子吸收光谱扩展到该光谱的近红外区域。(1b)和(2b)在CH 3中电解溶液的原位电化学esr光谱。CN与报道的轻掺杂共轭聚合物的光谱相似。化学证据表明该产品为聚嗪,元素和凝胶渗透色谱分析的结果表明(1b)和ca的聚合度在2–5范围内。对于(2b)和(3b),其结果示于图17中,尽管在后一种情况下,有证据表明该材料具有更大的分子量。从电解溶液中分离出来的黑色固体物质,其中含有支持电解质(Me 4 NBF 4),其比电导率为ca。10 –10(1b),10
Superelectrophilic-Initiated C–H Functionalization at the β-Position of Thiophenes: A One-Pot Synthesis of <i>trans</i>-Stereospecific Saddle-Shaped Cyclic Compounds
Superelectrophilic-initiated direct C–H functionalization of thiophenes at the β-position was developed. A series of trans-stereospecific [2,1-a]-IF-thiophene-fused cyclic compounds (4) with saddle-shaped structure were prepared in 17–30% yields through a one-pot superelectrophilic Friedel–Crafts reaction of dihydroindenofluorene with thiophene derivatives. From the crystal packing analyses of 4a, its
Versatile Direct Cyclization Constructs Spiro‐acridan Derivatives for Highly Efficient TADF emitters
作者:He Liu、Zhiwen Liu、Ganggang Li、Huaina Huang、Changjiang Zhou、Zhiming Wang、Chuluo Yang
DOI:10.1002/anie.202103187
日期:2021.5.25
provide a wide possibility to assemble efficient TADF emitters. As an example, D2T‐TR with high photoluminescent quantum yield and proper TADF character is applied in organic lightemitting diodes (OLEDs) which achieves a maximum external quantum efficiency (EQE) of 27.1 %. This work shows us a bright inspiration on developing excellent organic optoelectronic materials and an effective tool to realize it
Fluor�nac�nes et fluor�naph�nes. Synth�ses dans la s�rie des ind�no-fluor�nes IV. Cis-fluor�nac�ne (ind�no-(2?,1?: 2,3)-fluor�ne) et trans-fluor�naph�ne (ind�no-(1?,2?: 1,2)-fluor�ne)
作者:Louis Chardonnens、Ren� Ritter
DOI:10.1002/hlca.19550380203
日期:——
On décrit de nouvelles synthèses de l'indéno-(2′,1′: 2,3)-fluorène (cisfluorènacène) et de l'indéno-(1′,2′: 1,2)-fluorène (trans-fluorènaphéne).
在décritde nouvellessynthèsesde l'indéno-(2',1':2,3)-fluorène(cisfluorènacène)et de l'indéno-(1',2':1,2)-fluorène(trans-fluorènaphéne) 。
The structure–property relationship study of electron-deficient dihydroindeno[2,1-b]fluorene derivatives for n-type organic field effect transistors
A bridged syn triphenylene derivative functionalized with dicyanovinylene units (2,1-b)-IF(C(CN)2)2 has been synthesized, characterized and successfully used as an active layer in n-channel OFETs. Pseudo CMOS inverters made of n-type (2,1-b)-IF(C(CN)2)2 -based OFETs have been fabricated.