Palladium-directed self-assembly of multi-titanium(IV)-porphyrin arrays on the substrate surface as sensitive ultrathin films for hydrogen peroxide sensing, photocurrent generation, and photochromism of viologen

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	Palladium-directed self-assembly of multi-titanium(IV)-porphyrin arrays on the substrate surface as sensitive ultrathin films for hydrogen peroxide sensing, photocurrent generation, and photochromism of viologen
	He, Wen-Li 1; Fang, Fang 1; Ma, Dong-Mei 1; Chen, Meng 1; Qian, Dong-Jin 1; Liu, Minghua 2
刊名	APPLIED SURFACE SCIENCE
	2018
卷号	427 页码:1003-1010
关键词	Multiporphyrin Arrays Layer-by-layer Assembly Hydrogen Peroxide Sensing Photocurrent Generation Photochromism
英文摘要	Multiporphyrin arrays are large, pi-conjugated chromophores with high absorption efficiency and strong chemical stability that play an important role in supramolecular and advanced material sciences. Palladium-directed self-assembly of multiporphyrin array ultrathin films was achieved on substrate surfaces using oxo[5,10,15,20-tetra(4-pyridyl) porphyrinato] titanium (IV) complex [TiO(TPyP)] as a linker and sodium tetrachloropalladate (Na2PdCl4) as a connector. The Pd-TiOTPyP films as prepared were characterized by using UV-vis absorption and X-ray photoelectron spectroscopy, as well as by atomic force and scanning electron microscopy. The Soret absorption band of TiOTPyP was observed to red shift by 6 nm when the Pd-TiOTPyP multilayer-modified quartz substrate was immersed in an aqueous solution containing hydrogen peroxide. This was attributed to the formation of a TiO2TPyP monoperoxo complex. This oxidation reaction could be accelerated in an acidic solution. Furthermore, the immobilized Pd-TiOTPyP multilayers could act as light-harvesting units for photocurrent generation and photochromism of viologens, with strong stability, reproducibility, and recyclability. The photocurrent density could be enhanced in electrolyte solutions containing electron donors such as triethanolamine, or electron acceptors such as viologens. Finally, photoinduced reduction (photochromism) of viologens was investigated using the Pd-TiOTPyP multilayers as light sensitizers and EDTA as the electron donors. (C) 2017 Elsevier B.V. All rights reserved.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/38889]
专题	化学研究所_其它
作者单位	1.Fudan Univ, Dept Chem, 220 Handan Rd, Shanghai 200433, Peoples R China 2.Chinese Acad Sci, Inst Chem, CAS Key Lab Colloid Interface & Chem Thermodynam, Beijing Natl Lab Mol Sci, 2 Zhongguancun Beiyijie, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	He, Wen-Li,Fang, Fang,Ma, Dong-Mei,et al. Palladium-directed self-assembly of multi-titanium(IV)-porphyrin arrays on the substrate surface as sensitive ultrathin films for hydrogen peroxide sensing, photocurrent generation, and photochromism of viologen[J]. APPLIED SURFACE SCIENCE,2018,427:1003-1010.
APA	He, Wen-Li,Fang, Fang,Ma, Dong-Mei,Chen, Meng,Qian, Dong-Jin,&Liu, Minghua.(2018).Palladium-directed self-assembly of multi-titanium(IV)-porphyrin arrays on the substrate surface as sensitive ultrathin films for hydrogen peroxide sensing, photocurrent generation, and photochromism of viologen.APPLIED SURFACE SCIENCE,427,1003-1010.
MLA	He, Wen-Li,et al."Palladium-directed self-assembly of multi-titanium(IV)-porphyrin arrays on the substrate surface as sensitive ultrathin films for hydrogen peroxide sensing, photocurrent generation, and photochromism of viologen".APPLIED SURFACE SCIENCE 427(2018):1003-1010.