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Four novel z-shaped hexanuclear vanadium oxide clusters as efficient heterogeneous catalysts for cycloaddition of CO_(2) and oxidative desulfurization reactions

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Chinese Chemical Letters 2023年第1期34卷 478-482页

作者： Jilei Wang Jiapeng Cao zeyu Du Xiaomei Liu Jianian Li Qingdong Ping Tingting zang Yan Xu College of Chemical Engineering State Key Laboratory of Materials-Oriented Chemical EngineeringNanjing Tech UniversityNanjing 211800China Coordination Chemistry Institute State Key Laboratory of Coordination ChemistryNanjing UniversityNanjing 210093China

Chemical fixation of CO_(2)into C1 source, as a general approach, can effectively alleviate the emission of greenhouse gasses. Whereas, the challenge posed by the need for efficient catalysts with high catalytic active sites still exists. In this work, we reported a series of new hexavanadate clusters, [(C6H6ON)2(C2H8N2)2(CH3O)6VIV6O8](V6–1), [(C6H6ON)2(C3H10N2)2(CH3O)6VIV6O8](V6–2), [(C6H6ON)2(C6H14N2)2(CH3O)6VIV6O8](V6–3) and [(C6H6ON)2(C4H11N2O)2(CH3O)4VIV6O8](V6–4), assembled by 2-aminophenol and four different kinds of Lewis bases(LB), ethanediamine(en), 1,2-diaminopropane, 1,2-cyclohexanediamine and N-(2-hydroxyethyl)ethylenediamine(ben) together. Among them, the basic unit {V6} cluster featured z-shaped configuration represents a brand-new example of hexanuclear vanadium clusters. Remarkably, the catalytic tests demonstrated that V6–1 as catalyst displays high catalytic activity in the cycloaddition for the CO_(2)fixation into cyclic carbonates by virtue of open V sites. As expected, for oxidative desulfurization of sulfides, V6–1 also exhibits satisfied catalytic effectiveness. Furthermore, the recycling test confirmed that catalyst V6–1 may be a bifunctional heterogeneous catalyst with great promise for both CO_(2)cycloaddition and oxidative desulfurization reactions.

关键词： z-shaped Hexavanadate cluster Lewis acid catalyst Cycloaddition of CO_(2) Oxidative desulfurization

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Outcome Assessment of z-shaped Osteotomy in the Management of Humeral Shaft Nonunion Secondary to Failed Plate Osteosynthesis

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Current Medical Science 2019年第3期39卷 426-430页

作者： Dong CHEN Jie LIU Shao-hua LI Department of Orthopedic Surgery Shanghai Tenth People's Hospital Tongji University School of Medicine Shanghai 200072 China

Restoration of fracture alignment by osteotomy is crucial for the management of humeral nonunion. In the present study, we introduced a new way of osteotomy (z-shaped) in treating humeral shaft nonunion secondary to failed plate osteosynthesis. Clinical data of 24 patients with humeral shaft nonunion following implant failure (from 2010 to 2014) were retrospectively evaluated. These patients underwent z-shaped osteotomy in revision surgery after the initial surgery, plate osteosynthesis, was failed. Outcomes were evaluated using visual analogue scale (VAS) and Constant and Murley score. Repeated analysis of variance (ANOVA) was used for statistical analysis. Patients were followed up for a minimum of 24 months (26.83±4.33 months). The operative time was 102.33±10.16 min, and hospital stay averaged 9.75±2.13 days. All patients achieved clinical union at the latest follow-up. Complications included radial palsy (n=1) and superficial wound infection (n=1). The postoperative VAS scores decreased significantly compared to preoperative score (F=257.99, Pz-shaped osteotomy was easy to perform, and it provided additional medial support with more bone contact areas. Revision surgery using locking plate and z-shaped osteotomy achieved high union rate and improved functional outcome. It was a reasonable and safe option for treating humeral nonunion following implant failure.

关键词： z-shaped osteotomy humeral shaft nonunion implant failure

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