Luminescence 3d-4f Heterometallic Helicates as Effective Catalysts for the Cycloaddition of Carbon Dioxide to Epoxides
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- 英文论文题名：Luminescence 3d-4f Heterometallic Helicates as Effective Catalysts for the Cycloaddition of Carbon Dioxide to Epoxides
- 论文作者：Li Wang ; Rui-Lian Zhang ; Weisheng Liu
- 英文论文作者：Li Wang ; Rui-Lian Zhang ; Weisheng Liu ; Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province ; College of Chemistry and Chemical Engineering ; Lanzhou University
- 年：2016
- 作者机构：Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province,College of Chemistry and Chemical Engineering,Lanzhou University;
- 英文论文关键词：Lanthanide ; Heterometallic ; Helicates ; Luminescence ; Catalytic
- 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-第十六分会：晶体工程
- 语种：英文
- 分类号：O643.36
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第十六分会 ; 晶体工程
- 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：234k
- 原文格式：D
- 会议级别：全国
摘要
Reasonable ligand design to selective introduction of metal ions in the multidentate ligand pockets can be achieved to furnish 3d-4f heterometalhc that would be of great use in luminescent and catalysis application~([1-2]).Three 3d-4f heterometalhc helicates was successfully constructed via a self-assembly reaction involving the asymmetric salen ligand and Zn~Ⅱ,Ln~Ⅲ(Tb,Er,Yb) ions.These helicates not only display strong characteristic Ln-centered emission in the visible and NIR regions,which suggests that Ln~Ⅲ-based luminescence is sensitized by the effective energy transfer from the ligand to the metals,but also show excellent catalytic activity toward the cycloaddition of carbon dioxide to epoxides to produce cyclic carbonates,with an initial turnover frequency as high as 1,100 per mole of catalyst per hour and wide substrate scopes.The catalytic activity of the 3d-4f helicates is superior to its pure transition metal or lanthanide complex and efficient suitable for internal epoxides,which verified that heterometalhc cooperativity is a promising means to improve catalyst reactivity and selectivity.Moreover,the catalyst could be reused more than 3 times without a significant decrease both in catalytic performance and lanthanide luminescence,implying that the 3d-4f helicates structure is relatively robust.
Reasonable ligand design to selective introduction of metal ions in the multidentate ligand pockets can be achieved to furnish 3d-4f heterometalhc that would be of great use in luminescent and catalysis application~([1-2]).Three 3d-4f heterometalhc helicates was successfully constructed via a self-assembly reaction involving the asymmetric salen ligand and Zn~Ⅱ,Ln~Ⅲ(Tb,Er,Yb) ions.These helicates not only display strong characteristic Ln-centered emission in the visible and NIR regions,which suggests that Ln~Ⅲ-based luminescence is sensitized by the effective energy transfer from the ligand to the metals,but also show excellent catalytic activity toward the cycloaddition of carbon dioxide to epoxides to produce cyclic carbonates,with an initial turnover frequency as high as 1,100 per mole of catalyst per hour and wide substrate scopes.The catalytic activity of the 3d-4f helicates is superior to its pure transition metal or lanthanide complex and efficient suitable for internal epoxides,which verified that heterometalhc cooperativity is a promising means to improve catalyst reactivity and selectivity.Moreover,the catalyst could be reused more than 3 times without a significant decrease both in catalytic performance and lanthanide luminescence,implying that the 3d-4f helicates structure is relatively robust.
Reasonable ligand design to selective introduction of metal ions in the multidentate ligand pockets can be achieved to furnish 3d-4f heterometalhc that would be of great use in luminescent and catalysis application~([1-2]).Three 3d-4f heterometalhc helicates was successfully constructed via a self-assembly reaction involving the asymmetric salen ligand and Zn~Ⅱ,Ln~Ⅲ(Tb,Er,Yb) ions.These helicates not only display strong characteristic Ln-centered emission in the visible and NIR regions,which suggests that Ln~Ⅲ-based luminescence is sensitized by the effective energy transfer from the ligand to the metals,but also show excellent catalytic activity toward the cycloaddition of carbon dioxide to epoxides to produce cyclic carbonates,with an initial turnover frequency as high as 1,100 per mole of catalyst per hour and wide substrate scopes.The catalytic activity of the 3d-4f helicates is superior to its pure transition metal or lanthanide complex and efficient suitable for internal epoxides,which verified that heterometalhc cooperativity is a promising means to improve catalyst reactivity and selectivity.Moreover,the catalyst could be reused more than 3 times without a significant decrease both in catalytic performance and lanthanide luminescence,implying that the 3d-4f helicates structure is relatively robust.
引文
[1]Garden J A.;Saini P K.;Williams C K.J.Am.Chem.Soc.2015,137(48):15078.
[2]Matsunaga S,Shibasaki M.Chem Commun,2014,50(9):1044.
[2]Matsunaga S,Shibasaki M.Chem Commun,2014,50(9):1044.