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Abnormal effect of hydroxyl on the longest wavelength maximum in ultraviolet absorption spectra for bis‐aryl Schiff bases

机译：羟基对双芳基席基底座紫外线吸收光谱最长波长最大值的异常影响

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Abstract > Two sets of bis‐aryl Schiff bases that contain 4(or 4′)‐OH and 2(or 2′)‐OH were synthesized. The first set consists of 4‐HOArCH=NArY and XArCH=NArOH‐4′, and the second set consists of 2‐HOArCH=NArY and XArCH=NArOH‐2′. Their ultraviolet absorption spectra were measured and investigated. A very interesting phenomenon was observed by analyzing their wave number ν <sub>max</sub> (cm ?1 ) of longest wavelength maximum λ <sub>max</sub> (nm) of ultraviolet. Compared with the change regularity of the ν <sub>max</sub> of XArCH=NArY (where the X and Y excluded OH), the 4′‐position hydroxyl (4′‐OH) and 2′‐position hydroxyl (2′‐OH) have abnormal performance. The details are the following: the 4′‐OH contributes an additional red shift to the ν <sub>max</sub> of XArCH=NArOH‐4′ (λ <sub>max</sub> increase), whereas the 2′‐OH contributes an additional blue shift to the ν <sub>max</sub> of XArCH=NArOH‐2′ (λ <sub>max</sub> decrease). In addition, there are ortho steric effects of all 2‐OH and 2′‐OH on the ν <sub>max</sub> for 2‐HOArCH=NArY and XArCH=NArOH‐2′, and the ortho steric effect contributes a red shift to their ν <sub>max</sub> . These experimental facts can provide an important theoretical reference for us using aryl Schiff base compounds as optical materials and performing the molecular design. </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”> <标题类型=“main”>抽象</ title> >两组包含4（或4'） - OH和2（或2'） - 哦，合成。第一个组由4-hoarch = nary和xarch = naroh-4'组成，第二组由2-hoarch = nary和xarch = naroh-2'组成。测量并研究其紫外线吸收光谱。通过分析它们的波长最大λ<sum>最大值<sum>最大值<sub> max </ sub>（nm）的波数ν<sum> max </ sum>（cm Δ1/ sup>）来观察非常有趣的现象。紫外线。与XARCH = NARY的χ<亚> MAX </ sub>的变化规律相比（其中x和y排除OH），4'-位置羟基（4'-OH）和2'-位置羟基（2 '-OH）具有异常表现。细节如下：4'-OH为XARCH = NAROH-4'的ν<子> MAX </ SUB>贡献额外的红色移位（λ<sub> max </ sub>增加），而2 '-OH为XARCH = NAROH-2'的ν<子> MAX </ sum>额外的蓝色移位贡献（λ<sub> max </ sub>减少）。另外，在2-Hoarch = Nary和XARCH = NAROH-2'的χ<sum> MAX </ sub>上存在正交效果。红色转移到它们的ν<sub> max </ sub>。这些实验事实可以使用芳基Shiff基础化合物作为光学材料来为我们提供重要的理论参考，并进行分子设计。 </ p> </ abstract> </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-35546/'>《Journal of Physical Organic Chemistry》</a> <b style="margin: 0 2px;">|</b><span>2017年第10期</span><b style="margin: 0 2px;">|</b><span>共8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=Cao Chao‐Tun&option=202" target="_blank" rel="nofollow">Cao Chao‐Tun;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Zhou Wei&option=202" target="_blank" rel="nofollow">Zhou Wei;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Cao Chenzhong&option=202" target="_blank" rel="nofollow">Cao Chenzhong;</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>Key Laboratory of Theoretical Organic Chemistry and Function Molecule Ministry of Education Hunan Provincial University Key Laboratory of QSAR/QSPR School of Chemistry and Chemical EngineeringHunan University of Science and TechnologyXiangtan 411201 Hu;</p> <p>Key Laboratory of Theoretical Organic Chemistry and Function Molecule Ministry of Education Hunan Provincial University Key Laboratory of QSAR/QSPR School of Chemistry and Chemical EngineeringHunan University of Science and TechnologyXiangtan 411201 Hu;</p> <p>Key Laboratory of Theoretical Organic Chemistry and Function Molecule Ministry of Education Hunan Provincial University Key Laboratory of QSAR/QSPR School of Chemistry and Chemical EngineeringHunan University of Science and TechnologyXiangtan 411201 Hu;</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/4796.html" title="有机化学一般性问题">有机化学一般性问题;</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=hydroxyl&option=203" rel="nofollow">hydroxyl;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=ortho steric effect&option=203" rel="nofollow">ortho steric effect;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Schiff base&option=203" rel="nofollow">Schiff base;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=substituent effect&option=203" rel="nofollow">substituent effect;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=ultraviolet absorption spectra&option=203" rel="nofollow">ultraviolet absorption spectra;</a> </p> <div class="translation"> 机译：羟基;邻近效果;席克夫碱;取代基效应;紫外线吸收光谱; </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 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