title: Mass spectrometric monitoring of interfacial photoelectron transfer and imaging of active crystalline facets of semiconductors.
abstract: Monitoring of interfacial electron transfer (ET) in situ is important to understand the ET mechanism and designing efficient photocatalysts. We describe herein a mass spectrometric approach to investigate the ultrafast transfer of photoelectrons that are generated by ultraviolet irradiation on surfaces of semiconductor nanoparticles or crystalline facets. The mass spectrometric approach can not only untargetedly detect various intermediates but also monitor their reactivity through associative or dissociative photoelectron capture dissociation, as well as electron detachment dissociation of adsorbed molecules. Proton-coupled electron transfer and proton-uncoupled electron transfer with radical initiated polymerization or hydroxyl radical abstraction have been unambiguously demonstrated with the mass spectrometric approach. Active crystalline facets of titanium dioxide for photocatalytic degradation of juglone and organochlorine dichlorodiphenyltrichloroethane are visualized with mass spectrometry imaging based on ion scanning and spectral reconstruction. This work provides a new technique for studying photo-electric properties of various materials.
authors.affiliation: Mass Spectrometry Center for Structural Identification of Biological Molecules and Precision Medicine, Institute of Public Health and Molecular Medicine Analysis, Key Laboratory of Pesticides and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, China.
authors.forename: Hongying
authors.identifier: 0000-0003-2733-7909
authors.initials: H
authors.lastname: Zhong
authors.affiliation: Mass Spectrometry Center for Structural Identification of Biological Molecules and Precision Medicine, Institute of Public Health and Molecular Medicine Analysis, Key Laboratory of Pesticides and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, China.
authors.forename: Juan
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Mass Spectrometry Center for Structural Identification of Biological Molecules and Precision Medicine, Institute of Public Health and Molecular Medicine Analysis, Key Laboratory of Pesticides and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, China.
authors.forename: Xuemei
authors.initials: X
authors.lastname: Tang
authors.affiliation: Mass Spectrometry Center for Structural Identification of Biological Molecules and Precision Medicine, Institute of Public Health and Molecular Medicine Analysis, Key Laboratory of Pesticides and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, China.
authors.forename: Wenyang
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Mass Spectrometry Center for Structural Identification of Biological Molecules and Precision Medicine, Institute of Public Health and Molecular Medicine Analysis, Key Laboratory of Pesticides and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, China.
authors.forename: Ruowei
authors.initials: R
authors.lastname: Jiang
authors.affiliation: Mass Spectrometry Center for Structural Identification of Biological Molecules and Precision Medicine, Institute of Public Health and Molecular Medicine Analysis, Key Laboratory of Pesticides and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Li
authors.affiliation: Mass Spectrometry Center for Structural Identification of Biological Molecules and Precision Medicine, Institute of Public Health and Molecular Medicine Analysis, Key Laboratory of Pesticides and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, China.
authors.forename: Disong
authors.initials: D
authors.lastname: Chen
authors.affiliation: Mass Spectrometry Center for Structural Identification of Biological Molecules and Precision Medicine, Institute of Public Health and Molecular Medicine Analysis, Key Laboratory of Pesticides and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
authors.affiliation: Mass Spectrometry Center for Structural Identification of Biological Molecules and Precision Medicine, Institute of Public Health and Molecular Medicine Analysis, Key Laboratory of Pesticides and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, China.
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Yuan