Photocatalytic deoxygenation of sulfoxides to sulfides over titanium(IV) oxide at room temperature without use of metal co-catalysts

Photocatalytic deoxygenation of sulfoxides to sulfides over titanium(IV) oxide at room temperature without use of metal co-catalysts
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室温下,不使用金属助催化剂,在氧化钛(IV)上光催化将亚砜脱氧为硫化物

DOI:
10.1016/j.catcom.2014.05.028
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发表时间:
2014
期刊:
Catal. Commun.
影响因子:
--
通讯作者:
K. Hashimoto
K. Hashimoto
中科院分区:
--
文献类型:
--
作者:
H. Kominami;K. Nakanishi;S. Yamamoto;K. Imamura;K. Hashimoto

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在室温下,在紫外光照射下,研究了亚砜在无金属钛(IV)氧化物(TiO 2)的乙腈悬浮液中的脱氧作用。实验结果表明,TiO2光催化剂具有明显的除氧作用,甲酸、草酸等有机酸适合作为光催化反应中的空穴清除剂。二苯亚砜被成功地还原为二苯硫醚,产率高,TiO2光催化剂可以重复使用脱氧没有损失的活性。该光催化方法可用于各种亚砜的脱氧反应,使苯基乙烯基亚砜在不发生C双键加氢的情况下,化学选择性地还原为苯基乙烯基硫醚。
Deoxygenation of sulfoxides was examined in acetonitrile suspensions of metal-free titanium(IV) oxide (TiO2) under irradiation of UV light at room temperature. Experimental results indicate that deoxygenation was induced by the TiO2photocatalyst and that organic acids such as formic acid and oxalic acid are appropriate as hole scavengers in the photocatalytic reaction. Diphenyl sulfoxide was successfully deoxygenated to diphenyl sulfide with high yields, and the TiO2photocatalyst could be repeatedly used for deoxygenation without loss of activity. The present photocatalytic method could be applied for deoxygenation of various sulfoxides to corresponding sulfides, and phenyl vinyl sulfoxide was chemoselectively reduced to phenyl vinyl sulfide without hydrogenation of a Cdouble bondC double bond.
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发表时间: 1980
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