Unit2卷面满分为70分,考试时间为1小时30分钟;在AS阶段占比为50%,在整个Alevel阶段占比为20%; 【学习目标】 深刻理解化学概念: 学生应该能够深入理解原子结构、化学键、反应动力学、平衡、酸碱性等化学概念的原理和应用。 掌握实验技能: 学生需要掌握安全的实验室操作技能,能够进行各种类型的化学实验,理解实验设计和...
β-Cyclodextrin-conjugated zinc(II) phthalocyanines form stable host–guest complexes with a tetrasulfonated porphyrin and sodium 2-anthraquinonesulfonate (AQ) in water. Upon excitation of the porphyrin unit, they undergo excitation energy transfer followed by electron transfer as shown by various spectro...
The solid-phase chemistry literature from the 1960s to 1997 has been reviewed with an emphasis on organic chemistry. Reactions have been classified according to the products formed on the solid phase, the types of chemistry performed, names of chemical reactions, asymmetric reactions and transition ...
Helium is generally understood to be chemically inert and this is due to its extremely stable closed-shell electronic configuration, zero electron affinity and an unsurpassed ionization potential. It is not known to form thermodynamically stable compounds, except a few inclusion compounds. Here, using...
Chen, Y., Spiering, A., Karthikeyan, S. et al. Mechanically induced chemiluminescence from polymers incorporating a 1,2-dioxetane unit in the main chain. Nature Chem 4, 559–562 (2012). https://doi.org/10.1038/nchem.1358 Download citation Received16 January 2012 Accepted20 April 2012 Pub...
a focus of attention for the macro-submicro interplay problem is put in the relations between observations and inferences; we examine such relations with the aid of ideas from the philosophy of science and the specific philosophy of chemistry. We propose a model-based approach that recognises the...
We report here a new family of RE-MOFs featuring the novel inorganic building unit, RE4(μ3-O)2 (RE: Y3+, Tb3+, Dy3+, Ho3+, Er3+, and Yb3+), with planar D2h symmetry. The rigid 4-c linker, H4L, directs the in situ assembly of the unique 8-c RE4(μ3-O)2(COO)8 ...
Paper 4 Paper 5 Legacy A-levels in the UK AQA Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 OCR Unit 1 Unit 2 Unit 4 Unit 5 WJEC Unit 1 Unit 2 Unit 4 Unit 5 Read MoreHow to name organic compounds in ALevel Chemistry | PMT EducationGCSE exam dates 2025: Everything you need- to...
The organometallic product of these reactions was identified as a dimeric material [(Ar''O)2Ti(mu-PhCN)2Ti(OAr'')2] (8) containing two bridging benzonitrile ligands. The solid state structure of 8 showed the bridging PhCN unit to be highly reduced and strongly bound to the titanium metal...
If other units are mentioned within your article, you should provide the equivalent unit in SI. Tables Tables must be submitted as editable text, not as images. Some guidelines: Place tables next to the relevant text or on a separate page(s) at the end of your article. Cite all tables ...