Science in China Series B: Chemistry
Công bố khoa học tiêu biểu
* Dữ liệu chỉ mang tính chất tham khảo
Sắp xếp:
A reaction-and-assembly approach using monoamine zinc porphyrin for highly stable large-area perovskite solar cells
Science in China Series B: Chemistry - Tập 63 - Trang 777-784 - 2020
Inhibiting the irreversible escape of organic cations and iodide species in perovskite films is crucial for the fabrication of efficient and stable perovskite solar cells (PSCs). Here, we develop a reaction-and-assembly approach using monoamine zinc porphyrin (ZnP) to modify methylammonium (MA+) lead iodide perovskite film. The amine group in ZnP reacts with MA+ and I− ions to yield monoammonium z......
Trisubstituted alkenes featuring aryl groups: stereoselective synthetic strategies and applications
Science in China Series B: Chemistry - Tập 66 - Trang 1261-1287 - 2023
In recent years, the synthesis and application of alkenes have attracted increased attention. Triphenylethenes (TriPEs) have lower molecular torsion than tetraphenylethenes (TPEs), which helps to balance the degree of conjugation and the aggregation-induced emission (AIE) effect. The geometry of double bonds has a significant impact on luminescence. Therefore, it is essential to provide a comprehe......
Radical cascade reactions of unsaturated C-C bonds involving migration
Science in China Series B: Chemistry - Tập 62 - Trang 1476-1491 - 2019
During the past few years, with the rapid development of mild methods for the generation of radical species, great progress in radical cascade reactions of unsaturated C-C bonds has been made. Many radical cascade reactions involve functional groups migration, which leads structurally much more diverse, complex and valuable compounds not easily obtained through other methods. In this review, the r......
A theoretical study of hydrothermal stability of P-modified ZSM-5 zeolites
Science in China Series B: Chemistry - - 2009
Density functional theory was employed to study the hydrothermal stability of P-modified ZSM-5 zeolites using cluster models. The calculations of hydrolysis energies indicated that the introduction of phosphorus increases the hydrothermal stability of ZSM-5 zeolites. The initial paths of dealumination were studied with explicit water molecules. It was found that the framework Al-O coordination bon......
Theoretical study of highly vibrational states of nonlinear triatomic molecules using Lie algebraic approach
Science in China Series B: Chemistry - Tập 43 Số 1 - Trang 99-104 - 2000
The vibrational excitations of bent triatomic molecules are studied by using Lie algebra. The RMS error of fitting 30 spectroscopic data is 1.66 cm−1 for SO2. The results show that the expansion of a molecular algebraic Hamiltonian can well describe the experimental data. And the total vibrational levels can be calculated using this Hamiltonian. At the same time, the potential energy surface can a......
Synthesis of (S)-(+)-tylophorine and its seco analogues using free radical reaction
Science in China Series B: Chemistry - - 2009
Theoretical prediction on a special bridging metal–Xe–metal bond with remarkable stability in Re2Cp2(PF3)4Xe
Science in China Series B: Chemistry - Tập 59 Số 6 - Trang 760-764 - 2016
The bridging Re–Xe–Re bond with a remarkable stability is firstly predicted. The average binding energies for Re–Xe bond in Re2Cp2(PF3)4Xe with bridging Xe are calculated to be higher than that in ReCp(CO)2Xe, ReCp(CO)(PF3)Xe and ReCp(PF3)2Xe with terminal Xe. The interaction between two ReCp(PF3)2 fragments provides an additional contribution for the stability of bridging Re–Xe–Re bond. Besides, ......
Preparation and properties of physically and chemically cross-linked hybrid hydrophobic association hydrogels with good mechanical strength
Science in China Series B: Chemistry - Tập 59 - Trang 282-292 - 2015
To correct the defects of hydrophobic association hydrogels (HA-gels), new physically and chemically cross-linked hybrid hydrophobic association hydrogels (hybrid HA-gels) were prepared by radical copolymerization of acrylamide (AM), octylphenol polyoxyethylene (n) acrylate (OPnAC, n stands for the number of ethoxy group, and is 10 and 21) and N,N′-methylenebisacrylamide (MBA). On the basis of the......
Reversal of diastereoselectivity in palladium-arene interaction directed hydrogenative desymmetrization of 1,3-diketones
Science in China Series B: Chemistry - Tập 63 - Trang 215-221 - 2019
For the metal-catalyzed asymmetric hydrogenation of α-substituted ketones, cis reductive products are generally obtained due to steric hindrance of substituents. Herein, an unprecedented trans reductive products were observed in palladium-catalyzed hydrogenative desymmetrization of cyclic and acyclic 1,3-diketones, providing the chiral trans β-hydroxy ketones with two adjacent stereocenters includ......
Diamond nanospherulite: A novel material produced at carbon-water interface by pulsed-laser ablation
Science in China Series B: Chemistry - Tập 40 - Trang 608-615 - 1997
Formation of carbon nanoparticles with perfectly spherical shape and diamond structure (diamond nanospherulite) by laser-ablating a variety of carbon samples in water is reported for the first time. The studies reveal that molten carbon nanoparticles generated by laser ablation are quenched directly by water and end up as diamond nanospherulites, possibly due to the high pressure arising from surf......
Tổng số: 3,565
- 1
- 2
- 3
- 4
- 5
- 6
- 10