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7 results on '"Yi-Qi Tian"'

1. Synthesis and characterization of Ag(I) alkynyl nanoclusters utilizing MoVI-anchored thiacalix[4]arene metalloligands: Application in electrocatalytic CO2 reduction

Author

Shang-Qian Li, Liang-Jun Li, Yi-Qi Tian, Wen-Lei Mu, Ru-Xin Meng, Jun Yan, and Chao Liu

Subjects
ag(i) alkynyl nanoclusters, thiacalix[4]arene, metalloligand, electrocatalytic co2 reduction, Inorganic chemistry, QD146-197
Abstract

The utilization of metalloligands as building blocks for assembling heteronuclear metallocages or heterometallic coordination polymers has garnered increasing attention, yet its utilization for assembling Ag(I) alkynyl nanoclusters remains limited. In this study, we present the synthesis of two new Ag(I) alkynyl nanoclusters, namely, Mo2Ag8 and Mo2Ag12, employing a MoVIO2R-anchored (R = O or OEt) thiacalix[4]arene (TC4A) as a metalloligand. Through detailed structural analyses, their distinct sandwich geometries were revealed. Mo2Ag8 features a square Ag4(tBuC≡C)4 core enclosed between two {MoAg2–TC4A} units, with two MoO2(OEt) units suspended on each side. Mo2Ag12 features a hexagonal Ag6(tBuC≡C)6 core sandwiched between two {MoAg3–TC4A} units, with two MO3 units acting as oxygen anion templates, directly interacting with Ag(I) ions. In addition, we demonstrated the electrocatalytic application of Ag–Mo bimetallic clusters for CO2 reduction. The catalytic analysis results show that the binding mode of MO3 units considerably influences the electrochemical CO2 reduction activity and competitive hydrogen evolution reaction activity of the clusters. Notably, Mo2Ag12 achieved an impressive Faradaic efficiency of 60.85% for CO production at a voltage of −0.8 V (vs. RHE).

Published
2024
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3. Ancillary ligand-regulated Ti(<scp>iv</scp>)-based metallocalixarene coordination cages for photocatalytic H2 evolution

Author

Yi-Qi Tian, Yun-Shu Cui, Jia-Hui Zhu, Cong-Qiao Xu, Xiao-Yi Yi, Jun Li, and Chao Liu

Subjects
Materials Chemistry, Metals and Alloys, Ceramics and Composites, General Chemistry, Catalysis, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials
Abstract

The first family of tunable metallocalixarene coordination cages of Ti(iv) with a framework formula [Ti12(iOPr)12(TBC[4])6L6] have been assembled from six {Ti2(iOPr)2(TBC[4])}2+ nodes and six pyridinedicarboxylic ligands through [6+6] condensation.

Published
2022

4. An ultrastable Ti-based metallocalixarene nanocage cluster with photocatalytic amine oxidation activity

Author

Yi-Qi Tian, Yun-Shu Cui, Wei-Dong Yu, Cong-Qiao Xu, Xiao-Yi Yi, Jun Yan, Jun Li, and Chao Liu

Subjects
Materials Chemistry, Metals and Alloys, Ceramics and Composites, General Chemistry, Catalysis, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials
Abstract

The first Ti(iv)-based metallocalixarene nanocage cluster was obtained using t-butylcalix[4]arene as the ligand, which has extraordinary chemical stability and can act as a stable photocatalyst to catalyze the oxidation of ammonia to imine.

Published
2022

6. Cd-Doped Polyoxotitanium Nanoclusters with a Modifiable Organic Shell for Photoelectrochemical Water Splitting

Author

Jun Yan, Xue-Ru Liu, Yi-Qi Tian, Xiao-Yi Yi, Yi-Xin Wu, Guo Chen, and Chao Liu

Subjects
Inorganic Chemistry, Chemistry, Electrospray ionization, Inorganic chemistry, Water splitting, Chemical modification, Physical and Theoretical Chemistry, Isostructural, Nanoclusters, Nanomaterials, Turnover number, Catalysis
Abstract

Incorporating heterometal and chromogenic groups into the titanium oxo cluster (TOC) nanomaterials is one of the effective strategies for the development of new high-performance photoelectrically active materials. In this Article, we report the structures and photoelectrochemical (PEC) performances of a family of TOCs, including pure [Ti12O8(OEt)16L8] ({Me-Ti12}) and six Cd-doped clusters formulated as [H4Cd2Ti10O8(OEt)16(L)8(H2O)2] ({Cd2Ti10}; L = salicylic acid and their derivatives). The six Cd-doped clusters are isostructural, containing the same {Cd2Ti10O8} core, but are protected by salicylic ligands modified with different functional groups. The compositions, structures, and solution stability of these clusters have been studied in detail by single-crystal X-ray diffraction and electrospray ionization mass spectrometry measurements. The embedding of heterometallic Cd(II) and chemical modification of organic protective shells can effectively regulate the PEC water oxidation activity of those clusters, with {F-Cd2Ti10} having the highest turnover number of 518.55 and the highest turnover frequency of 172.85 h-1. Our work highlights the potential of using TOCs that do not contain noble metals as water oxidation catalysts, and their catalytic activity can be regulated by structural modification.

Published
2021

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