Objective To reduce the risk of choosing API starting materials incorrectly since the rationality of its selection and the scientific justification of quality research have a significant impact on the quality control ...Objective To reduce the risk of choosing API starting materials incorrectly since the rationality of its selection and the scientific justification of quality research have a significant impact on the quality control of API.Methods Failure mode and effects analysis(FMEA)strategy was used to do the risk management of API starting materials of D company.Results and Conclusion The FMEA method can improve the risk management of the research of API starting materials for D company,which is still effective to apply the method to C company and R company.展开更多
Synthesis technology and properties of cordierite from solid waste resources/Tan Qitong,Zhao Huizhong,Yu Jun,Zhang Han,Tan Liqiang//Naihuo Cailiao.-2024,58(3):185 Abstract:To effectively utilize solid waste resources ...Synthesis technology and properties of cordierite from solid waste resources/Tan Qitong,Zhao Huizhong,Yu Jun,Zhang Han,Tan Liqiang//Naihuo Cailiao.-2024,58(3):185 Abstract:To effectively utilize solid waste resources and relieve resource constraints,cordierite refractory raw materials were prepared according to the chemical composition of cordierite,using 12 mass%fused magnesia dust powder,40 mass%fused corundum dust powder and 48 mass%quartz tailings as starting materials.展开更多
In this paper,the synthesis of gold(I)-calix[8]arene complexes from benzyloxycalix[8]arene used as a starting material is reported.8 or 16 trimethylphosphine-gold(I)are grafted to the calix[8]arene via a C_(4)alkane c...In this paper,the synthesis of gold(I)-calix[8]arene complexes from benzyloxycalix[8]arene used as a starting material is reported.8 or 16 trimethylphosphine-gold(I)are grafted to the calix[8]arene via a C_(4)alkane chain linker and a thiolate group.The formed gold(I)-complexes are studied by NMR spectroscopy.It is also shown that these complexes can act as both source of metal and stabilizing agent for the formation of gold nanoparticles as the radiolytic reduction of these complexes produces small monodisperse nanoparticles.展开更多
In this work,we report the preparation,isolation,and characterization of a family of double-decker silses-quioxane architectures starting from the previously reported DDSQ-Me_(2)H_(2)precursor,a mixture of cis and tra...In this work,we report the preparation,isolation,and characterization of a family of double-decker silses-quioxane architectures starting from the previously reported DDSQ-Me_(2)H_(2)precursor,a mixture of cis and trans isomers.Using such a starting material results in a subsequent mixture of isomers when hydrosilyl-ation reactions using DDSQ-Me_(2)H_(2)and hydroxyalkyl-substituted alkenes catalyzed by Karstedt catalyst are performed.We describe a procedure to sequentially crystallize the two isomers from one another,affording a protocol potentially applicable to other closely related derivatives.The ability to access pure cis and trans isomers of double-decker silsesquioxanes may result in the preparation of new materials and polymers with well-defined properties.All resulting silsesquioxanes were characterized by multinuclear(^(1)H,^(13)C,and^(29)Si)NMR spectroscopy,FT-IR,and HR-MS.Additionally,we report five crystal structures of geometrical isomers,including two cis forms described in the literature for the first time.This is a break-through in itself and sets a new strategy for obtaining such exiting organosilicon-based systems.展开更多
Organic-inorganic lead halide perovskites represent a group of materials with diverse structures and promising optical/optoelectronic properties.The performance of perovskite based solar cells relies tremendously on t...Organic-inorganic lead halide perovskites represent a group of materials with diverse structures and promising optical/optoelectronic properties.The performance of perovskite based solar cells relies tremendously on the structure/properties of the absorber.The physicochemical properties of the perovskite active layer depend on the substrate,preparation methods,environments and the starting materials.In this study,we investigated the effects of starting materials in the precursor solution on the physicochemical properties of the resulting one-step spin coated MA_(0.8)FA_(0.2)PbI_(3-y)Br_(y) film and the photovoltaic performance of the corresponding inverted(p-i-n)perovskite solar cells.Two precursor solutions containing exactly the same atom stoichiometry were prepared from two different groups of starting materials(Group A:CH_(3)NH_(3)I,CH(NH_(2))_(2)I,CH_(3)NH_(3)Br,and PbI_(2);Group B:CH_(3)NH_(3)I,CH(NH_(2))_(2)I,PbI_(2) and PbBr_(2)).The MA_(0.8)FA_(0.2)PbI_(3-y)Br_(y) films(A1 and A2)prepared from the A precursor solution had better photovoltaic performances compared to those(B1 and B2)obtained from the B precursor solution for the same y values.The stoichiometry of the film to achieve the best photovoltaic performance(the corresponding cell has the highest efficiency)is not the same for the A-group(prepared from the A precursor solution)and B-group films(prepared from the B precursor solution).The photovoltaic performance of the perovskite film is directly correlated to the crystallinity,morphology and defect sites of the film as evidenced by GIXRD,scanning electron microscopy(SEM)and transient photoluminescence(TRPL)data.The morphology of the mixed-halide perovskite films depends on the homogeneity of the halide stoichiometries.The A-group films with more possible halide stoichiometries have better crystallinity and continuity compared to those of the B-group films,probably due to the difference in the crystallization rates for the two group perovskite films.Therefore,for preparing mixed-halide perovskites with the same average halide stoichiometry,starting materials that can produce perovskite films with more halide stoichiometries are a better choice.展开更多
文摘Objective To reduce the risk of choosing API starting materials incorrectly since the rationality of its selection and the scientific justification of quality research have a significant impact on the quality control of API.Methods Failure mode and effects analysis(FMEA)strategy was used to do the risk management of API starting materials of D company.Results and Conclusion The FMEA method can improve the risk management of the research of API starting materials for D company,which is still effective to apply the method to C company and R company.
文摘Synthesis technology and properties of cordierite from solid waste resources/Tan Qitong,Zhao Huizhong,Yu Jun,Zhang Han,Tan Liqiang//Naihuo Cailiao.-2024,58(3):185 Abstract:To effectively utilize solid waste resources and relieve resource constraints,cordierite refractory raw materials were prepared according to the chemical composition of cordierite,using 12 mass%fused magnesia dust powder,40 mass%fused corundum dust powder and 48 mass%quartz tailings as starting materials.
基金D.Dragoe(ICMMO,UniversitéParis-Sud)for XPS measurements.The authors also wish to thank Charmmmat ANR-11-LABX-0039,grant to I.A.
文摘In this paper,the synthesis of gold(I)-calix[8]arene complexes from benzyloxycalix[8]arene used as a starting material is reported.8 or 16 trimethylphosphine-gold(I)are grafted to the calix[8]arene via a C_(4)alkane chain linker and a thiolate group.The formed gold(I)-complexes are studied by NMR spectroscopy.It is also shown that these complexes can act as both source of metal and stabilizing agent for the formation of gold nanoparticles as the radiolytic reduction of these complexes produces small monodisperse nanoparticles.
基金supported by the National Science Centre,Poland(Grant No.2020/39/B/ST4/00910).
文摘In this work,we report the preparation,isolation,and characterization of a family of double-decker silses-quioxane architectures starting from the previously reported DDSQ-Me_(2)H_(2)precursor,a mixture of cis and trans isomers.Using such a starting material results in a subsequent mixture of isomers when hydrosilyl-ation reactions using DDSQ-Me_(2)H_(2)and hydroxyalkyl-substituted alkenes catalyzed by Karstedt catalyst are performed.We describe a procedure to sequentially crystallize the two isomers from one another,affording a protocol potentially applicable to other closely related derivatives.The ability to access pure cis and trans isomers of double-decker silsesquioxanes may result in the preparation of new materials and polymers with well-defined properties.All resulting silsesquioxanes were characterized by multinuclear(^(1)H,^(13)C,and^(29)Si)NMR spectroscopy,FT-IR,and HR-MS.Additionally,we report five crystal structures of geometrical isomers,including two cis forms described in the literature for the first time.This is a break-through in itself and sets a new strategy for obtaining such exiting organosilicon-based systems.
文摘Organic-inorganic lead halide perovskites represent a group of materials with diverse structures and promising optical/optoelectronic properties.The performance of perovskite based solar cells relies tremendously on the structure/properties of the absorber.The physicochemical properties of the perovskite active layer depend on the substrate,preparation methods,environments and the starting materials.In this study,we investigated the effects of starting materials in the precursor solution on the physicochemical properties of the resulting one-step spin coated MA_(0.8)FA_(0.2)PbI_(3-y)Br_(y) film and the photovoltaic performance of the corresponding inverted(p-i-n)perovskite solar cells.Two precursor solutions containing exactly the same atom stoichiometry were prepared from two different groups of starting materials(Group A:CH_(3)NH_(3)I,CH(NH_(2))_(2)I,CH_(3)NH_(3)Br,and PbI_(2);Group B:CH_(3)NH_(3)I,CH(NH_(2))_(2)I,PbI_(2) and PbBr_(2)).The MA_(0.8)FA_(0.2)PbI_(3-y)Br_(y) films(A1 and A2)prepared from the A precursor solution had better photovoltaic performances compared to those(B1 and B2)obtained from the B precursor solution for the same y values.The stoichiometry of the film to achieve the best photovoltaic performance(the corresponding cell has the highest efficiency)is not the same for the A-group(prepared from the A precursor solution)and B-group films(prepared from the B precursor solution).The photovoltaic performance of the perovskite film is directly correlated to the crystallinity,morphology and defect sites of the film as evidenced by GIXRD,scanning electron microscopy(SEM)and transient photoluminescence(TRPL)data.The morphology of the mixed-halide perovskite films depends on the homogeneity of the halide stoichiometries.The A-group films with more possible halide stoichiometries have better crystallinity and continuity compared to those of the B-group films,probably due to the difference in the crystallization rates for the two group perovskite films.Therefore,for preparing mixed-halide perovskites with the same average halide stoichiometry,starting materials that can produce perovskite films with more halide stoichiometries are a better choice.
