查找使用阿拉丁产品的科研文献

Base-assisted activation of phenols in TiO2 surface complex under visible light irradiation

Jinping Zhang,Haijun Chen,Meijiang Liu,Tianliang Lu,Beibei Gao,Xiaomei Yang,Lipeng Zhou,Hongji Li,Yunlai Su

Surface charge-transfer complex formed by TiO 2 and phenols has showed a great potential in visible-light photocatalysis. However, back electron transfer limits the charge transfer efficiency and the activation of phenols in surface complex. Herein, we disclosed the efficient activation of phenols in surface complex by introducing the base. Both homocoupling reactions and butylated hydroxytoluene-trapped experiments clearly demonstrated the generation of phenolic radicals from various lignin-derived substrates. The addition of base caused the blue-shifted absorption of surface complex, while increased the visible light-induced electron excitation from substrate to TiO 2 . Vibrational spectra suggested that the interaction between phenolate and TiO 2 was stronger than the interaction between neutral phenol and TiO 2 . This base-triggered strategy may be conducive to useful transformations or degradation of phenols via surface complex.