核心素养导向下的“配合物理论简介”教学案例

基于对《普通高中化学课程标准(2017年版2020年修订)》、新教材的研究以及对学情的分析,以主题式实验探究的方式建构“配合物理论简介”的教学实践,运用“POE策略”,通过层层递进的问题推进和教学实施,突破理论教学的障碍点,拓展学生的思维,发展学生的化学学科核心素养。     

基于课程标准的化学学习表现性目标设计:理论基础、设计框架与案例解析

“教、学、评”一体化是确保化学学科核心素养课程顺利实施的重要举措。如何基于课程标准进行“教、学、评”一体化目标设计是当前化学教育理论与实践研究所共同关注的课题。引进国际科学教育领域中学习表现性目标理念,基于整合式化学学科核心素养视角,采用结构中心设计原则和证据中心设计原则作为设计方法论,构建了基于课程标准的化学学习表现性目标设计框架。并以“2.2 氧化还原反应”专题为例,阐述该专题下化学学习表现性目标的设计过程以及基于该目标的“教、学、评”一体化的活动设计,以期对基于化学学科核心素养的课堂教学与评价研究和实践提供新视角和思路。     

基于课程标准的科学建模能力试题开发与检验研究

科学建模能力测评是化学学科核心素养评价改革的重要组成部分.如何基于课程标准对学生科学建模能力进行试题开发和评价是目前化学教育研究者和一线教师所共同关注的研究议题.以整体效度理论为理论基础,采用结构中心设计原则和证据中心设计原则作为设计方法论,构建了基于课程标准的科学建模能力试题开发框架,并以“电离与离子反应”主题中具体...     

原始化学问题的内涵与价值

在化学教育中落实化学学科核心素养,是我国当前化学教育教学改革的现实问题。与传统习题不同的是,原始化学问题关注学生在解决“复杂的、不确定的现实问题”时的综合品质,是一种能够考查学生高水平化学学科核心素养的新型问题。对原始化学问题的内涵进行深入解读,厘清原始化学问题与化学习题的关系,发掘原始化学问题的教育价值,有助于落实化学学科核心素养,促进学生系统思维的发展,引导化学教育评价理念的变革。     

有机化学基于师范生核心素养的实践教学能力培养研究

作为落实立德树人这一教育目标的重要精神内核,核心素养为师范生专业课程改革提供了强大的理论支撑并指出了明确的改革方向。师范生核心素养的关键是学科综合素养,只有全面提高师范生的综合素养才能提升他们的核心素养从而增强师范生的教育实力,我国的中小学教育便能在优秀师范生的带动下,彰显出强大的生机和活力。作为中学化学知识的加强与延伸,大学有机化学教学已然成为化学师范生提升专业能力的重要基石。因此,我们要在大学有机化学的师范教育中融入核心素养的理念,在教学过程中使师范生将"所学"内化吸收为"所用",培养师范生自身的核心素养,为他们日后成为优秀教育工作者打下坚实的素质基础。     

2017年版普通高中化学课程标准的重大变化及解析

对2017年版普通高中化学课程标准中化学学科的本质及价值、化学学科核心素养的内涵及结构、化学课程内容体系和“素养为本”化学课堂教学的设计等重大变化进行了解析。     

真实情境与化学学科核心素养的发展——基于《普通高中化学课程标准(2017年版)》的解读

《普通高中化学课程标准（2017年版）》构建了化学学科核心素养的内容体系及其发展水平框架,重视开展“素养为本”的教学,重视真实情境的创设。在分析教学情境的内涵与功能的基础上,解读了新课标中课程内容、实施建议和命题原则中对真实情境创设与应用的要求,讨论了真实情境在发展学生化学学科核心素养中的教育价值。通过对具体教学案例的分析,探讨了基于学生化学学科核心素养发展的教学情境设计的策略。     

人教版高中化学必修教科书的内容呈现方式及特点分析*

高中化学教科书是发展学生化学学科核心素养的重要载体和资源平台。依据《普通高中化学课程标准(2017年版)》编写的人教版普通高中化学必修教科书作为分析文本,着重从栏目系统、图像系统、习题系统角度对其呈现方式进行分析,具体特点表现为:栏目系统强化功能性,图像系统凸显直观性,习题系统体现针对性、情境性、开放性,以期为高中化学教师有效使用教科书、落实化学学科核心素养的培养发挥积极作用。     

高中化学教学应用网络资源的案例及反思

依据新的化学课程标准,学习方法和学习策略的重点,由过去只重视书本知识的学习转向强调信息的收集、加工、处理及知识的建构、应用能力的培养。因此,培养学生的科学探究能力和信息素养是目前中学化学教学中关键的一环。本文着眼于在学科教学中利用网络资源,注意化学学科的特点,运用多种教学模式,对现行条件下网络教学与化学教学的融合,进行了初步探索。     

化学科学思维的内涵及其发展路径*——让学生像化学家一样思考

具备像化学家一样认识、思考和解决问题的化学科学思维被视为化学学科核心素养形成的重要标志。从问题解决思维观的视角下提出了化学科学思维的概念。并通过阐述宏观与微观相联系的化学科学思维方式和证据推理与模型推理的化学科学思维方法明确化学科学思维的内涵。最后,在此基础上提出了化学科学思维的心理机制和培养路径。     

二氧化碳和丙烯直接合成甲基丙烯酸的NiPMo/TiO2催化剂的研究

用溶胶-凝胶法以磷钼酸(MPA)的镍盐溶液水解钛酸四丁酯制备了NiPMo/TiO2催化剂.使用ICP、 XRD、 TG-DTA、 IR、 TPD-MS和微反应技术研究了催化剂的化学组成、热稳定性、化学吸附性质和催化反应性能.杂多钼酸盐与TiO2通过O2-在TiO2表面发生了键合.在623 K下,杂多阴离子仍保持原有的Keggin结构.CO2在Lewis酸位Ni(Ⅱ)和Lewis碱位Ni-O-Mo的桥氧协同作用下生成CO2卧式吸附态Ni(Ⅱ)←O-(CO)←(O--Ni).丙烯有多种吸附态在催化剂上吸附.在563 K、 1 MPa和空速1500 h-1的反应条件下,丙烯的摩尔转化率为3.2%,产物MAA选择性为95%.     

Toward new camptothecins. Part 6: Synthesis of crucial ketones and their use in Friedländer reaction

In the context of the preparation of camptothecin and luotonin A analogs, the synthesis of some key keto-precursors and their use in Friedländer condensation are described. This paper also focuses on the stability of these keto intermediates and emphasizes the major differences between indolizinones and pyrroloquinazolinones series. Noteworthy is also the report of some original structures isolated as by-products of some experiments.     

CoFe2O4自形成磁性液体场致结构化对磁化的影响

The Langevin paramagnetic theory can’t describe the relation between magnetization of ferrofluids and applied magnetic field. The structuralization of ferrofluids, which is considered the main influence factor of the magnetization, is regarded. The part of magnetization works is deposited when the structure is forming. This action influences the magnetization of ferrofluids directly or indirectly. On the base of the “compressing” model, the Langevin function that usually describes the magnetization of ferrofluid is modified, and a well-fitted curve is obtained. An equation of the relation between the equivalent volume fraction after being “compressed” and the intensity of magnetic field is discovered, which approximately describes the process of magnetization. The relation between the approximate initial susceptibility and the volume fraction can be obtained from modified formula.     

Highly regioselective Buchwald–Hartwig amination at C-2 of 2,4-dichloropyridine enabling a novel approach to 2,4-bisanilinopyridine (BAPyd) libraries

The highly regioselective Buchwald–Hartwig amination at C-2 of the cheap and readily accessible reagent, 2,4-dichloropyridine with a range of anilines and heterocyclic amines is described. This new methodology is robust and provides a facile access to 4-chloro-N-phenylpyridin-2-amines on 0.25 mol scale. These intermediates undergo a further Buchwald–Hartwig amination at higher temperature to enable rapid exploration of the chemical space at C-4 and to provide a library of 2,4-bisaminopyridines.     

KMnO4-mediated oxidative CN bond cleavage of tertiary amines: Synthesis of amides and sulfonamides

KMnO₄-mediated oxidative CN bond cleavage of tertiary amines producing secondary amine was introduced, which was trapped by electrophiles (acyl chloride and sulfonyl chloride) to form amides and sulfonamides. The reaction could take place at mild condition, tolerating a wide range of function groups and affording products in moderate to excellent yields.     

Chemistry of heterocyclic compounds at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, over 50 years (Review)

The review contains a concise historical account and information on the most significant researches undertaken by the staff at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences on the Chemistry of Heterocyclic Compounds. Dedicated to Academician of the Russian Academy of Sciences B. A. Trofimov on his 70th jubilee. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1443–1502, October, 2008.     

Sulfur-directed metal-free and regiospecific methyl C(sp3)–H imidation of thioanisoles

Regiospecific and direct imidation of the methyl C(sp³)–H bond of thioanisoles is realized under mild and metal-free conditions with N-fluorobis(benzenesulfonyl)imide as an oxidant and nitrogen source. Proposed mechanism suggests that thionium ion intermediates and a Pummerer-type reaction are involved. The imidation has advantages such as high step-economy, excellent functionality tolerance, and regiospecificity, giving structurally diverse imidation products.     

Selective syntheses of 2H-1,3-oxazines and 1H-pyrrol-3(2H)-ones via temperature-dependent Rh(II)-carbenoid-mediated 2H-azirine-ring expansion

The Rh(II)-catalyzed reaction of 2-carbonyl-substituted 2H-azirines with ethyl 2-cyano-2-diazoacetate or 2-diazo-3,3,3-trifluoropropionate provides an easy access to 2H-1,3-oxazines and 1H-pyrrol-3(2H)-ones. These compounds can be selectively prepared from the same starting material using temperature as the only varied parameter. The 2-azabuta-1,3-diene intermediate, a common precursor for both heterocyclic products, isomerizes into 2H-1,3-oxazine under kinetic control, while 1H-pyrrol-3(2H)-one is the sole product of the reaction at elevated temperatures. According to DFT-calculations a one-atom oxazine ring contraction involving ring-opening to a 2-azabuta-1,3-diene intermediate, followed by a 1,5- and 1,2-prototropic shift leads to the consecutive formation of imidoylketene and azomethine ylide, which then further undergo cyclization to the pyrrole derivative.     

Copper catalyzed/mediated synthetic methodology for ebselen and related isoselenazolones

Scope of the copper catalyzed/mediated selenium-nitrogen coupling reaction has been studied for the synthesis of isoselenazolones. It is noticed that the 2-chloro, 2-bromo-, and 2-iodo-aryl amides substrates can be exploited in the selenium-nitrogen coupling reaction by employing 25-100 mol % of CuI/1,10-phenanthroline (L) and potassium carbonate as a base in DMF. Furthermore, electron rich 2-chloro-arylamides also underwent selenium-nitrogen coupling reaction to give biologically important selenium-nitrogen heterocycles. Also, copper-catalyzed selenium-nitrogen coupling reaction has been meticulously applied for the synthesis of diaryl diselenides having methoxy, amine, and amide functionality from respective aryl iodides in the presence of stoichiometric amount of succinimide as an external Se-N coupling partner.