Axially Chiral TADF‐Active Enantiomers Designed for Efficient Blue Circularly Polarized Electroluminescence

Li Meng; Wang Yin‐Feng; Zhang Dongdong; Duan Lian; Chen Chuan‐Feng

摘要

Abstract > The use of a chiral, emitting skeleton for axially chiral enantiomers showing activity in thermally activated delayed fluorescence (TADF) with circularly polarized electroluminescence (CPEL) is proposed. A pair of chiral stable enantiomers, (?)‐( S )‐Cz‐Ax‐CN and (+)‐( R )‐Cz‐Ax‐CN, was designed and synthesized. The enantiomers, both exhibiting intramolecular π‐conjugated charge transfer (CT) and spatial CT, show TADF activities with a small singlet–triplet energy difference (Δ E <sub>ST</sub> ) of 0.029?eV and mirror‐image circularly polarized luminescence (CPL) activities with large g <sub>lum</sub> values. Notably, CP‐OLEDs based on the enantiomers feature blue electroluminescence centered at 468?nm with external quantum efficiencies (EQEs) of 12.5 and 12.7?%, and also show intense CPEL with g <sub>EL</sub> values of ?1.2×10 ?2 and +1.4×10 ?2 , respectively. These are the first CP‐OLEDs based on TADF‐active enantiomers with efficient blue CPEL. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“Main”XML：Lang =“en”> <标题类型=“main”>抽象</ title> > 提出使用手性，发射骨骼的轴向手性对映体，显示出在具有圆偏振电致发光（CPEL）的热活化延迟荧光（TADF）中的活性。一对手性稳定对映体，（？） - （ s </ i> ）-cz-ax-cn和（+） - （ R </ I> ）-CZ-AX-CN，设计和合成。对映体，两者都表现出分子内π-缀合的电荷转移（CT）和空间CT，显示出具有小单身三联能能量差的TADF活性（δ e </ i> st </ sub> 0.029的EV和镜像圆极化发光（CPL）的圆形偏振发光（CPL）活动 g </ i> <sub> lum </ sub> 价值观。值得注意的是，基于对映体的CP-OLED具有以468Ω·NM为中心的蓝色电致发光，其外部量子效率（EQES）为12.5和12.7？％，并且还显示强烈的CPEL g </ i> <sub> el </ sub> 值？1.2×10 ？2 </ sup> 和+ 1.4×10 ？2 </ sup> ，分别。这些是基于TADF活性对映异构体的第一种CP-OLED，其具有有效的蓝色CPEL。 </ p> </摘要> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-19011/'>《Angewandte Chemie》</a> <b style="margin: 0 2px;">|</b><span>2020年第9期</span><b style="margin: 0 2px;">|</b><span>共5页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Li Meng&option=202" target="_blank" rel="nofollow">Li Meng;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Wang Yin‐Feng&option=202" target="_blank" rel="nofollow">Wang Yin‐Feng;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Zhang Dongdong&option=202" target="_blank" rel="nofollow">Zhang Dongdong;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Duan Lian&option=202" target="_blank" rel="nofollow">Duan Lian;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Chen Chuan‐Feng&option=202" target="_blank" rel="nofollow">Chen Chuan‐Feng;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>CAS Key Laboratory of Molecular Recognition and FunctionChinese Academy of SciencesBeijing 100190 China;</p> <p>CAS Key Laboratory of Molecular Recognition and FunctionChinese Academy of SciencesBeijing 100190 China;</p> <p>Department of ChemistryTsinghua UniversityBeijing 100084 China;</p> <p>Department of ChemistryTsinghua UniversityBeijing 100084 China;</p> <p>CAS Key Laboratory of Molecular Recognition and FunctionChinese Academy of SciencesBeijing 100190 China;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/1188.html" title="应用化学">应用化学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=axially chiral enantiomers&option=203" rel="nofollow">axially chiral enantiomers;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=electroluminescence&option=203" rel="nofollow">electroluminescence;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=circularly polarized light&option=203" rel="nofollow">circularly polarized light;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=organic light-emitting diodes&option=203" rel="nofollow">organic light-emitting diodes;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=thermally activated delayed fluorescence&option=203" rel="nofollow">thermally activated delayed fluorescence;</a> </p> <div class="translation"> 机译：轴向手性对映体;电致发光;圆偏振光;有机发光二极管;热活化的延迟荧光; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704028162043.html">Axially Chiral TADF‐Active Enantiomers Designed for Efficient Blue Circularly Polarized 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