可见光作用下的非贵金属催化的汉斯酯及其衍生物芳构化产氢
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- 英文论文题名：Non-noble-Metal-Catalyzed Dehydrogenation Aromatization of Hantzsch Ester and Its Derivatives to Produce Dihydrogen under Visible Light
- 论文作者：王孝菊 ; 刘强
- 英文论文作者：Xiao-Ju Wang ; Qiang Liu ; State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University
- 年：2016
- 作者机构：兰州大学功能有机分子化学国家重点实验室;
- 论文关键词：可见光 ; 钴配合物 ; 汉斯酯 ; 产氢
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第四十五分会：物理有机
- 语种：中文
- 分类号：O643.3;TQ116.2
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第四十五分会 ; 物理有机
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：319k
- 原文格式：D
- 会议级别：全国
摘要
相较于氧化剂参与的脱氢反应,交叉偶联放氢反应(CCHE)~1不但避免了因氧化剂介入而产生的副反应,而且使脱氢反应中的电子和质子结合以放出氢气(H_2)——一种具有很高的燃烧焓的可持续的清洁能源放出。发展可见光催化的放氢反应,对解决迫在眉睫的能源危机和化学污染具有重大的意义。近年来,大部分用来产氢的光催化剂都是利用过渡金属甚至贵金属催化剂,因此,利用非贵金属催化剂来有效的实现这一系列的产氢反应尤为重要。基于此,我们提出了一个利用钴配合物做催化剂催化~2(Figure 1)产氢的策略:使用有机染料与它相结合催化放氢。实验结果表明,这一体系在催化汉斯酯类化合物脱氢芳构化生成吡啶衍生物中应用良好(Scheme 1)。
Compared with dehydrogenation reaction involving external oxidant, cross-coupling hydrogen evolution(CCHE)~1, without the use of any sacrificial oxidants, and only dihydrogen(H_2) is generated as a side product. Development of visible-light-catalyzed hydrogen evolution reaction is of great significance considering the looming energy crisis and chemical pollution.In recent years, mostly used catalyst to drive hydrogen evolution reaction is based on transition metal and even noble transition metal. Therefore, applying non-noble metal catalyst to achieve this transformation is very important. So, we put forward such a strategy that combines cobalt complexes(Figure 1) and organic dye to produce dihydrogen.The experimental results show that the system can effectively catalyze the dehydrogenation aromatization of Hantzsch ester compounds to give pyridine derivatives, concurrently generating dihydrogen(Scheme 1).
Compared with dehydrogenation reaction involving external oxidant, cross-coupling hydrogen evolution(CCHE)~1, without the use of any sacrificial oxidants, and only dihydrogen(H_2) is generated as a side product. Development of visible-light-catalyzed hydrogen evolution reaction is of great significance considering the looming energy crisis and chemical pollution.In recent years, mostly used catalyst to drive hydrogen evolution reaction is based on transition metal and even noble transition metal. Therefore, applying non-noble metal catalyst to achieve this transformation is very important. So, we put forward such a strategy that combines cobalt complexes(Figure 1) and organic dye to produce dihydrogen.The experimental results show that the system can effectively catalyze the dehydrogenation aromatization of Hantzsch ester compounds to give pyridine derivatives, concurrently generating dihydrogen(Scheme 1).
引文
[1]Meng,Q.-Y.;Zhong,J.-J.;Liu,Q.;Gao,X.-W.;Wu,L.-Z.J.Am.Chem.Soc.2013,135,19052.
[2]Mc Namara,W.R.;Han,Z.;Alperin,P.J.;Eisenberg,R.J.Am.Chem.Soc.2011,133,15368.
[2]Mc Namara,W.R.;Han,Z.;Alperin,P.J.;Eisenberg,R.J.Am.Chem.Soc.2011,133,15368.