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Synthesis of Bio-based Epoxy Containing phosphine oxide as a Reactive Additive Toward Highly Toughened and Fire-retarded Epoxy Resins

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Chinese Journal of Polymer Science 2023年第11期41卷 1733-1746,I0007页

作者： Chunxiang Wei Tianyu Gao Yu Xu Wenjie Yang Guangjian Dai Ruiting Li SanE Zhu Richard K.K.Yuen Wei Yang Hongdian Lu School of Energy Materials and Chemical EngineeringHefei UniversityHefei 230601China Yusuf Hamied Department of Chemistry University of CambridgeCambridge CB21EWU.K. Department of Architecture and Civil Engineering City University of Hong KongHong Kong 999077China

The integration of high mechanical toughness,impact strength as well as excellent flame-retardant properties toward epoxy resins(EPs)have always been a *** inadequate overall performance of EPs severely restricts their sustainable utilization in engineering aspects over ***,a new bio-based agent(diglycidyl ether of magnolol phosphine oxide,referred as DGEMP)derived from magnolol(classified as lignan),extracted from natural plants Magnolia officinalis,was successfully synthesized and further employed as a flameretardant reactive additive to diglycidyl ether of bisphenol A(DGEBA).As demonstration,the composite resin,DGEBA/15DGEMP(15 wt%DGEMP),achieved an Underwriters Laboratories-94 V-0 rating with a high limiting oxygen index(LOI)value(41.5%).In cone calorimeter tests,it showed that heat release and smoke production were effectively inhibited during combustion,wherein the peak heat release rate(PHRR)value of DGEBA/15DGEMP was reduced by 50%compared to neat ***,it exhibited a superior tensile strength(82.8 MPa),toughness(5.11MJ/m^(3))and impact strength(36.5 k J/m^(2)),much higher than that of neat DGEBA(49.7 MPa,2.05 MJ/m^(3)and 20.9 k J/m^(2)).Thus,it is highly anticipated that DGEMP imparts significantly improved mechanical and fire-retarded properties to conventional EPs,which holds a great potential to address the pressing challenges in EP thermosets industry.

关键词： Epoxy resin Magnolol phosphine oxide Toughness Flame retardant

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Inclusion property and Diels-Alder reaction of bis (diphenylphosphine oxide) butadiyne

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Chinese Journal of Chemistry 2000年第3期18卷 373-376页

作者：李明霞李金亮王永梅孟继本 Department of Chemistry Nankai University Tianjin 300071 China

The host molecule, bis (diphenylphosphine oxide) butadiyne (2), includes a variety of guests to form five complexes (2a—2e). In addition, the Diels-Alder reaction between 2 and anthracene gives 9, 9′, 10, 10′-tetrahedron-9, 9′, 10, 10′-bi-ethenoantracene-11, 11′-bis (diphenylphosphine oxide) (3) which is a potential di-π-methane reactant and can undergo photorearrangement.

关键词： Inclusion Diels-Alder reaction phosphine oxide solid-state reaction

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Development of a more efficient catalyst for the redox-neutral organocatalytic mitsunobu reaction by DFT-guided catalyst design

Green Synthesis and Catalysis

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Green Synthesis and Catalysis 2024年第4期5卷 290-296页

作者： Dingguo Song Changjun Zhang Yuqi Cheng Linlin Chen Jie Lin Changdi Zheng Ting Liu Yuxin Ding Fei Ling Weihui Zhong College of Pharmaceutical Sciences Zhejiang University of TechnologyHangzhou 310014China

The study of a Mitsunobu reaction is an important *** and co-workers first reported a novel(2-hydroxybenzyl)diphenylphosphine oxide for realizing the catalytic Mitsunobu reaction via a five-membered phosphonium ***,it is still worth investigating how to improve catalysts with higher *** by computational and experimental studies,we designed a new type of biphenyl-based phosphine oxide that would form a six-membered phosphonium species as a key intermediate to trigger the catalytic Mitsunobu reaction with a lower barrier of the rate-determining step(30.3 kcal/mol).DFT calculations revealed that only trans dehydration was participated in our catalytic progress and a strongπ-πinteraction and small spatial constraint of TS-V were crucial for high *** readily accessible,highly stable,easily recyclable and efficient catalyst would boost the catalytic Mitsunobu reaction.

关键词： phosphine oxide Mitsunobu reaction Late-sFtage diversification Drug discovery process

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