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Plasma modification of vanadium oxynitride surfaces: Characterization by in situ XPS experiments and DFT calculations (open access)

Plasma modification of vanadium oxynitride surfaces: Characterization by in situ XPS experiments and DFT calculations

Article reports XPS and DFT findings regarding the O₂ plasma, NH₃ plasma, and NH₃+O₂ plasma treatment of sputter deposited vanadium oxynitride films.
Date: October 13, 2020
Creator: Osonkie, A.; Lee, V.; Chukwunenye, P.; Cundari, Thomas R., 1964- & Kelber, Jeffry A.
System: The UNT Digital Library
Aggregation-induced phosphorescence sensitization in two heptanuclear and decanuclear gold–silver sandwich clusters (open access)

Aggregation-induced phosphorescence sensitization in two heptanuclear and decanuclear gold–silver sandwich clusters

This article obtains two few-atom heterometallic gold–silver hepta-/decanuclear clusters, denoted Au₆Ag and Au₉Ag, and determines their structures by X-ray diffraction and mass spectrometry.
Date: October 30, 2020
Creator: Lu, Zhou; Yang, Yu-Jie; Ni, Wen-Xiu; Li, Mian; Zhao, Yifang; Huang, Yong-Liang et al.
System: The UNT Digital Library
Substrate Specificity of LACCASE8 Facilitates Polymerization of Caffeyl Alcohol for C-Lignin Biosynthesis in the Seed Coat of Cleome hassleriana (open access)

Substrate Specificity of LACCASE8 Facilitates Polymerization of Caffeyl Alcohol for C-Lignin Biosynthesis in the Seed Coat of Cleome hassleriana

This article finds that the transcript profile of the laccase gene ChLAC8 parallels the accumulation of C-lignin during seed coat development. Recombinant ChLAC8 oxidizes caffeyl and sinapyl alcohols, generating their corresponding dimers or trimers in vitro, but cannot oxidize coniferyl alcohol. The authors propose a basis for this substrate preference based on molecular modeling/docking experiments. Suppression of ChLAC8 expression led to significantly reduced C-lignin content in the seed coats of transgenic Cleome plants. Feeding of 13C-caffeyl alcohol to the Arabidopsis (Arabidopsis thaliana) caffeic acid o-methyltransferase mutant resulted in no incorporation of 13C into C-lignin, but expressing ChLAC8 in this genetic background led to appearance of C-lignin with >40% label incorporation. These results indicate that ChLAC8 is required for C-lignin polymerization and determines lignin composition when caffeyl alcohol is available.
Date: October 9, 2020
Creator: Wang, Xin; Zhuo, Chunliu; Xiao, Xirong; Wang, Xiaoqiang; Docampo-Palacios, Maite; Chen, Fang et al.
System: The UNT Digital Library
Efficient separation of xylene isomers by a guest-responsive metal–organic framework with rotational anionic sites (open access)

Efficient separation of xylene isomers by a guest-responsive metal–organic framework with rotational anionic sites

Article demonstrating the adaptively molecular discrimination of xylene isomers by employing a NbOF52−-pillared metal–organic framework (NbOFFIVE-bpy-Ni, also referred to as ZU-61) with rotational anionic sites.
Date: October 28, 2020
Creator: Cui, Xili; Niu, Zheng; Shan, Chuan; Yang, Lifeng; Hu, Jianbo; Wang, Qingju et al.
System: The UNT Digital Library