2,6-Diisopropylaniline reacts with an open-cage fullerene derivative with a 11-membered orifice and forms an open-cage derivative containing one imino group on the rim of the expanded orifice.Further treatment with Le...2,6-Diisopropylaniline reacts with an open-cage fullerene derivative with a 11-membered orifice and forms an open-cage derivative containing one imino group on the rim of the expanded orifice.Further treatment with Lewis acids leads to open-cage fullerenes with an 18-membered orifice.Instead of the direct addition process observed before for less bulky anilines,an electron transfer process takes place in the initial step in the present reaction with bulky 2,6-diisopropylaniline.As a result,the chemo-selectivity is completely different affording the mono imino open-cage derivative selectively.展开更多
Corona virus disease 2019(COVID-19)is one of the worst infectious disease pandemics in the world since the 20th century.On 11 March 2020,the World Health Organization declared that the COVID-19 outbreak constituted a&...Corona virus disease 2019(COVID-19)is one of the worst infectious disease pandemics in the world since the 20th century.On 11 March 2020,the World Health Organization declared that the COVID-19 outbreak constituted a"global pandemic."Finally,it was not until May 2023 that the global emergency was declared over.Initially,non-drug interventions by countries,such as restricting inter-regional movement,reducing gatherings,and wearing masks,were effective in slowing the spread of COVID-19,while also decreasing influenza activity.展开更多
In order to study of adhesive which is applicable to the production of high strength four layer composite corrugated board,the composite corrugated medium was respectively coated with cassava starch adhesive,environme...In order to study of adhesive which is applicable to the production of high strength four layer composite corrugated board,the composite corrugated medium was respectively coated with cassava starch adhesive,environmental-friendly modified water glass binder,CP-88 starch adhesive,polyvinyl alcohol adhesive and polyvinyl acetate adhesive,then the edgewise crush resistance and flat crush resistance contrast experiment on produced corrugated board samples was tested.The experiment results demonstrated that the produced corrugated board with environmental-friendly modified water glass binder had high edgewise crush resistance,general flat crush resistance and more economic,so the environmental-friendly modified water glass binder can be used for the production of high strength four layer composite corrugated board.展开更多
基金supported by Beijing National Laboratory for Molecular Sciences(No.BNLMS-CXXM-201904)National Natural Science Foundation of China(NSFC,Nos.22171009,and 22261039)。
文摘2,6-Diisopropylaniline reacts with an open-cage fullerene derivative with a 11-membered orifice and forms an open-cage derivative containing one imino group on the rim of the expanded orifice.Further treatment with Lewis acids leads to open-cage fullerenes with an 18-membered orifice.Instead of the direct addition process observed before for less bulky anilines,an electron transfer process takes place in the initial step in the present reaction with bulky 2,6-diisopropylaniline.As a result,the chemo-selectivity is completely different affording the mono imino open-cage derivative selectively.
基金funded by the National Natural Science Foundation of China(No:82274576)Shanghai Science and Technology Commission(No:22Y21920400).
文摘Corona virus disease 2019(COVID-19)is one of the worst infectious disease pandemics in the world since the 20th century.On 11 March 2020,the World Health Organization declared that the COVID-19 outbreak constituted a"global pandemic."Finally,it was not until May 2023 that the global emergency was declared over.Initially,non-drug interventions by countries,such as restricting inter-regional movement,reducing gatherings,and wearing masks,were effective in slowing the spread of COVID-19,while also decreasing influenza activity.
文摘In order to study of adhesive which is applicable to the production of high strength four layer composite corrugated board,the composite corrugated medium was respectively coated with cassava starch adhesive,environmental-friendly modified water glass binder,CP-88 starch adhesive,polyvinyl alcohol adhesive and polyvinyl acetate adhesive,then the edgewise crush resistance and flat crush resistance contrast experiment on produced corrugated board samples was tested.The experiment results demonstrated that the produced corrugated board with environmental-friendly modified water glass binder had high edgewise crush resistance,general flat crush resistance and more economic,so the environmental-friendly modified water glass binder can be used for the production of high strength four layer composite corrugated board.
