The title compound （C19H15NO6） was synthesized via a three-component reaction and characterized by means of IR and 1H NMR. Its crystal and molecular structures were determined by X-ray diffractometry. It belongs to ...The title compound （C19H15NO6） was synthesized via a three-component reaction and characterized by means of IR and 1H NMR. Its crystal and molecular structures were determined by X-ray diffractometry. It belongs to the monoclinic system, space group P21/c with a = 11.670（3）, b = 12.076（3）, c = 11.613（3）, β = 99.490（4）°, V = 1614.2（7）3, Mr = 353.32, Z = 4, Dc = 1.454 g/cm3, λ = 0.71073, μ = 0.110 mm-1, F（000） = 736, the final R = 0.0503 and wR = 0.1311. A total of 8454 reflections were collected, of which 3497 were independent （Rint = 0.0333） and 2102 were observed with I 2σ（I）.展开更多
The title compound（C26H18N4O4） has been synthesized via a three-component reaction and it was characterized by means of IR and 1H NMR.Its crystal and molecular structures were determined by X-ray diffractometry.It b...The title compound（C26H18N4O4） has been synthesized via a three-component reaction and it was characterized by means of IR and 1H NMR.Its crystal and molecular structures were determined by X-ray diffractometry.It belongs to the triclinic system,space group P1 with a = 7.7288（15）,b = 11.168（2）,c = 12.645（3） ,α = 107.02（3）,β = 90.85（3）,γ = 101.93（3）°,V = 1017.9（3） 3,Mr = 450.44,Z = 2,Dc = 1.470 g/cm3,λ = 1.54178 ,μ = 0.836 mm-1,F（000） = 468,the final R = 0.0488 and wR = 0.1180.A total of 11903 reflections were collected,of which 3642 were independent（Rint = 0.0377） and 3025 were observed with I 2σ（I）.展开更多
The title compounds have been synthesized via a three-component reaction and their structures were characterized by IR, ^1H NMR, ^13C NMR and X-ray single-crystal diffraction. The crystal of compound 4a belongs to mon...The title compounds have been synthesized via a three-component reaction and their structures were characterized by IR, ^1H NMR, ^13C NMR and X-ray single-crystal diffraction. The crystal of compound 4a belongs to monoclinic, space group P121/c1 with a = 8.575（3）, b = 9.590（3）, c = 21.431（6）A, β = 91.172（3）°, V = 1762.1（9）A^3, Mr = 393.36, Z = 4, Dc= 1.483 g/cm^3, μ（MoKα） = 0.113 mm^-1, F（000） = 816, the final R = 0.0366 and wR = 0.0941. The crystal of compound 4b is of triclinic, space group P-1 with a = 8.6420（17）, b = 9.761（2）, c = 11.132（2） A, α = 97.51（3）, β = 97.86（3）, γ = 92.85（3）°, V = 920.1（3） A^3, Mr = 393.36, Z = 2, Dc = 1.420 g/cm^3, μ（MoKα） = 0.108 mm^-1, F（000） = 408, the final R = 0.0612 and wR = 0.1781. In each molecular structure, the naphthalene rings and pyran rings are almost coplanar with the latter in an envelope conformation. The rings formed by the N-H…O intramolecular hydrogen bonds are almost planar in these compounds. Their crystal packing is stabilized by intermolecular hydrogen bonds together with C-H…π and π-π stacking interactions.展开更多
The title compound, C18H13N3O2, has been synthesized for the first time by the multicomponent reaction of cyclopentanone, malononitrile and benzo[d][1,3]dioxole-5-carbalde-hyde in the presence of triethylamine. The st...The title compound, C18H13N3O2, has been synthesized for the first time by the multicomponent reaction of cyclopentanone, malononitrile and benzo[d][1,3]dioxole-5-carbalde-hyde in the presence of triethylamine. The structure has been determined by NMR, MS and single-crystal X-ray diffraction. The crystal belongs to the triclinic system, space group P with a = 10.476（5）, b = 10.973（5）, c = 13.825（5）, α = 87.244（5）, β = 73.296（5）, γ = 82.097（5）°, C18H13N3O2, Mr = 303.31, V = 1507.6（11） 3, Z = 4, Dc = 1.336 g/cm3, F（000） = 632, μ = 0.090 mm-1, R = 0.0431 and wR = 0.1051. There exist intermolecular N-H…N hydrogen bonds in the title compound.展开更多
A fully superconducting electron cyclotron resonance （ECR） ion source （SECRAL ID is currently being built in the Institute of Modern Physics, Chinese Academy of Sciences. Its key components are three superconductin...A fully superconducting electron cyclotron resonance （ECR） ion source （SECRAL ID is currently being built in the Institute of Modern Physics, Chinese Academy of Sciences. Its key components are three superconducting solenoids （Nb-Ti/Cu） and six superconducting sextupoles （Nb-Ti/Cu）. Different from the conventional supercon- ducting ECR magnetic structure, the SEC17AL Ⅱ includes three superconducting solenoid coils＇ that are located inside the superconducting sextupoles. The SECRAL Ⅱ can significantly reduce the interaction forces between the sextupole and the solenoids, and the magnets can also be more compact in size. For this multi-component SECRAL Ⅱ generating its self field of -8 T and being often exposed to the high self field, the mechanical analysis has become the main issue to keep their stress at 〈200 MPa on coils. The analytical and experimental results in mechanics are presented in the SECRAL Ⅱ structure. To improve the accuracy and efficiency of analysis, according to the composite rule of micromechanics, the equivalent uniform windings are used to simulate the epoxy-impregnated Nb-Ti/Cu coils. In addition, using low temperature strain gauges and a wireless fast strain acquisition system, a fundamental experiment on the based on our analysis, the stresses and deformations optimized. strains developments of a sextupole is reported. Finally, for its assembly of each SECRAL Ⅱ coil will be further展开更多
This manuscript provides a comparison of the Hypersphere World-Universe Model (WUM) with the prevailing Big Bang Model (BBM) of the Standard Cosmology. The performed analysis of BBM shows that the Four Pillars of the ...This manuscript provides a comparison of the Hypersphere World-Universe Model (WUM) with the prevailing Big Bang Model (BBM) of the Standard Cosmology. The performed analysis of BBM shows that the Four Pillars of the Standard Cosmology are model-dependent and not strong enough to support the model. The angular momentum problem is one of the most critical problems in BBM. Standard Cosmology cannot explain how Galaxies and Extra Solar systems obtained their substantial orbital and rotational angular momenta, and why the orbital momentum of Jupiter is considerably larger than the rotational momentum of the Sun. WUM is the only cosmological model in existence that is consistent with the Law of Conservation of Angular Momentum. To be consistent with this Fundamental Law, WUM discusses in detail the Beginning of the World. The Model introduces Dark Epoch (spanning from the Beginning of the World for 0.4 billion years) when only Dark Matter Particles (DMPs) existed, and Luminous Epoch (ever since for 13.8 billion years). Big Bang discussed in Standard Cosmology is, in our view, transition from Dark Epoch to Luminous Epoch due to Rotational Fission of Overspinning Dark Matter (DM) Supercluster’s Cores. WUM envisions Matter carried from the Universe into the World from the fourth spatial dimension by DMPs. Ordinary Matter is a byproduct of DM annihilation. WUM solves a number of physical problems in contemporary Cosmology and Astrophysics through DMPs and their interactions: Angular Momentum problem in birth and subsequent evolution of Galaxies and Extrasolar systems—how do they obtain it;Fermi Bubbles—two large structures in gamma-rays and X-rays above and below Galactic center;Diversity of Gravitationally-Rounded Objects in Solar system;some problems in Solar and Geophysics [1]. WUM reveals Inter-Connectivity of Primary Cosmological Parameters and calculates their values, which are in good agreement with the latest results of their measurements.展开更多
基金supported by the National Natural Science Foundation of China(No.81071144)Natural Science Foundation of Guangdong Province(No.9451806001002961)
文摘The title compound （C19H15NO6） was synthesized via a three-component reaction and characterized by means of IR and 1H NMR. Its crystal and molecular structures were determined by X-ray diffractometry. It belongs to the monoclinic system, space group P21/c with a = 11.670（3）, b = 12.076（3）, c = 11.613（3）, β = 99.490（4）°, V = 1614.2（7）3, Mr = 353.32, Z = 4, Dc = 1.454 g/cm3, λ = 0.71073, μ = 0.110 mm-1, F（000） = 736, the final R = 0.0503 and wR = 0.1311. A total of 8454 reflections were collected, of which 3497 were independent （Rint = 0.0333） and 2102 were observed with I 2σ（I）.
基金Project supported by the National Natural Science Foundation of China (No. 81071144)Natural Science Foundation of Guangdong Province (No. 9451806001002961)
文摘The title compound（C26H18N4O4） has been synthesized via a three-component reaction and it was characterized by means of IR and 1H NMR.Its crystal and molecular structures were determined by X-ray diffractometry.It belongs to the triclinic system,space group P1 with a = 7.7288（15）,b = 11.168（2）,c = 12.645（3） ,α = 107.02（3）,β = 90.85（3）,γ = 101.93（3）°,V = 1017.9（3） 3,Mr = 450.44,Z = 2,Dc = 1.470 g/cm3,λ = 1.54178 ,μ = 0.836 mm-1,F（000） = 468,the final R = 0.0488 and wR = 0.1180.A total of 11903 reflections were collected,of which 3642 were independent（Rint = 0.0377） and 3025 were observed with I 2σ（I）.
基金supported by the National Natural Science Foundation of China (No. 20672090)Natural Science Foundation of Jiangsu Province (No. BK2006033)Six Kinds of Professional Elite Foundation of Jiangsu Province (No. 06-A-039)
文摘The title compounds have been synthesized via a three-component reaction and their structures were characterized by IR, ^1H NMR, ^13C NMR and X-ray single-crystal diffraction. The crystal of compound 4a belongs to monoclinic, space group P121/c1 with a = 8.575（3）, b = 9.590（3）, c = 21.431（6）A, β = 91.172（3）°, V = 1762.1（9）A^3, Mr = 393.36, Z = 4, Dc= 1.483 g/cm^3, μ（MoKα） = 0.113 mm^-1, F（000） = 816, the final R = 0.0366 and wR = 0.0941. The crystal of compound 4b is of triclinic, space group P-1 with a = 8.6420（17）, b = 9.761（2）, c = 11.132（2） A, α = 97.51（3）, β = 97.86（3）, γ = 92.85（3）°, V = 920.1（3） A^3, Mr = 393.36, Z = 2, Dc = 1.420 g/cm^3, μ（MoKα） = 0.108 mm^-1, F（000） = 408, the final R = 0.0612 and wR = 0.1781. In each molecular structure, the naphthalene rings and pyran rings are almost coplanar with the latter in an envelope conformation. The rings formed by the N-H…O intramolecular hydrogen bonds are almost planar in these compounds. Their crystal packing is stabilized by intermolecular hydrogen bonds together with C-H…π and π-π stacking interactions.
基金supported by the Natural Science Foundation of Shandong Province (No. ZR2010BQ022)
文摘The title compound, C18H13N3O2, has been synthesized for the first time by the multicomponent reaction of cyclopentanone, malononitrile and benzo[d][1,3]dioxole-5-carbalde-hyde in the presence of triethylamine. The structure has been determined by NMR, MS and single-crystal X-ray diffraction. The crystal belongs to the triclinic system, space group P with a = 10.476（5）, b = 10.973（5）, c = 13.825（5）, α = 87.244（5）, β = 73.296（5）, γ = 82.097（5）°, C18H13N3O2, Mr = 303.31, V = 1507.6（11） 3, Z = 4, Dc = 1.336 g/cm3, F（000） = 632, μ = 0.090 mm-1, R = 0.0431 and wR = 0.1051. There exist intermolecular N-H…N hydrogen bonds in the title compound.
基金Supported by the National Natural Science Foundation of China under Grant No 11302225the China Postdoctoral Science Foundation under Grant Nos 2014M560820 and 2015T81071
文摘A fully superconducting electron cyclotron resonance （ECR） ion source （SECRAL ID is currently being built in the Institute of Modern Physics, Chinese Academy of Sciences. Its key components are three superconducting solenoids （Nb-Ti/Cu） and six superconducting sextupoles （Nb-Ti/Cu）. Different from the conventional supercon- ducting ECR magnetic structure, the SEC17AL Ⅱ includes three superconducting solenoid coils＇ that are located inside the superconducting sextupoles. The SECRAL Ⅱ can significantly reduce the interaction forces between the sextupole and the solenoids, and the magnets can also be more compact in size. For this multi-component SECRAL Ⅱ generating its self field of -8 T and being often exposed to the high self field, the mechanical analysis has become the main issue to keep their stress at 〈200 MPa on coils. The analytical and experimental results in mechanics are presented in the SECRAL Ⅱ structure. To improve the accuracy and efficiency of analysis, according to the composite rule of micromechanics, the equivalent uniform windings are used to simulate the epoxy-impregnated Nb-Ti/Cu coils. In addition, using low temperature strain gauges and a wireless fast strain acquisition system, a fundamental experiment on the based on our analysis, the stresses and deformations optimized. strains developments of a sextupole is reported. Finally, for its assembly of each SECRAL Ⅱ coil will be further
文摘This manuscript provides a comparison of the Hypersphere World-Universe Model (WUM) with the prevailing Big Bang Model (BBM) of the Standard Cosmology. The performed analysis of BBM shows that the Four Pillars of the Standard Cosmology are model-dependent and not strong enough to support the model. The angular momentum problem is one of the most critical problems in BBM. Standard Cosmology cannot explain how Galaxies and Extra Solar systems obtained their substantial orbital and rotational angular momenta, and why the orbital momentum of Jupiter is considerably larger than the rotational momentum of the Sun. WUM is the only cosmological model in existence that is consistent with the Law of Conservation of Angular Momentum. To be consistent with this Fundamental Law, WUM discusses in detail the Beginning of the World. The Model introduces Dark Epoch (spanning from the Beginning of the World for 0.4 billion years) when only Dark Matter Particles (DMPs) existed, and Luminous Epoch (ever since for 13.8 billion years). Big Bang discussed in Standard Cosmology is, in our view, transition from Dark Epoch to Luminous Epoch due to Rotational Fission of Overspinning Dark Matter (DM) Supercluster’s Cores. WUM envisions Matter carried from the Universe into the World from the fourth spatial dimension by DMPs. Ordinary Matter is a byproduct of DM annihilation. WUM solves a number of physical problems in contemporary Cosmology and Astrophysics through DMPs and their interactions: Angular Momentum problem in birth and subsequent evolution of Galaxies and Extrasolar systems—how do they obtain it;Fermi Bubbles—two large structures in gamma-rays and X-rays above and below Galactic center;Diversity of Gravitationally-Rounded Objects in Solar system;some problems in Solar and Geophysics [1]. WUM reveals Inter-Connectivity of Primary Cosmological Parameters and calculates their values, which are in good agreement with the latest results of their measurements.
