分级结构苯并噻二唑聚合物应用于可见光诱导硫醚选择性氧化
Visible-light induced selective oxidation of sulfides by hierarchical benzothiadiazolebased polymers
查看参考文献21篇
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文摘
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以4,7-二溴-2,1,3-苯并噻二唑为光活性基团,将其与1,3,5-三乙炔苯通过Sonogashira偶联反应合成出苯并噻二唑功能化的CMP-3-BT共轭微孔聚合物。所合成的CMP-3-BT由微球和弯曲丝状纳米带组成,呈现出复杂的分级结构,且具有半导体性质,其禁带宽度为2.24 eV。以蓝光LED灯(425 nm,3W)为光源,以过氧化氢为辅助剂,在室温和氧气氛围下,CMP-3-BT可将各种取代苯甲硫醚高效、高选择地氧化成相应的甲基苯基亚砜。电子顺磁共振谱表明上述光催化过程产生的~1O_2和O_2~(·-)是氧化苯甲硫醚的主要活性物种。CMP-3-BT经过6次循环使用后催化性能未发生改变,表明CMP-3-BT是一种结构稳定、性能优异、可循环利用的绿色催化剂。 |
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其他语种文摘
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By using 4,7-dibromo-2,1,3-benzothiadiazole as photoactive group,the Sonogashira coupling between 4,7-dibromo-2,1,3-benzothiadiazole and 1,3,5-triethynylbenzene results in benzothiadiazole functionalized conjugated microporous polymer(CMP),named CMP-3-BT.The obtained CMP-3-BT shows hierarchical structures,which consists of microspheres and curved nanobelts.Moreover,CMP-3-BT is semiconductive porous materials with band gap of 2.24 eV.By using 425 nm LED(3W)as light source,assisted by H_2O_2,CMP-3-BT enables the oxidation of thioanisole bearing various substituents to their corresponding sulfoxides under O_2 atmospheres at room temperature with high efficiency and excellent selectivity.EPR spectra indicate that the ~1O_2 and O_2~(·-) are the active oxygen species for the photo-oxidation of thioanisole.Importantly,the catalytic activity of CMP-3-BT remains unchanged after 6 cycles,indicating the excellent structural stability and catalytic activity of CMP-3-BT serving as a reusable green catalyst. |
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来源
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材料工程
,2021,49(7):64-70 【核心库】
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DOI
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10.11868/j.issn.1001-4381.2020.001202
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关键词
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共轭微孔聚合物
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可见光催化
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苯并噻二唑
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Sonogashira偶联反应
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硫醚氧化
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地址
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贵州师范大学化学与材料科学学院, 贵州省功能材料化学重点实验室, 贵阳, 550001
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-4381 |
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学科
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化学 |
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基金
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国家自然科学基金
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贵州省项目
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文献收藏号
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CSCD:7010948
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