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关键词： adamantane   multivalency   dendrimers   C-3 symmetry   diamandoids  

摘要： Due to its rigid cage structure, adamantane has received considerable interest as a scaffold with a defined tetrahedral geometry. In this paper we describe orthogonally functionalized tetrasubstituted adamantane derivatives. These compounds may be conjugated to other functional molecules by standard techniques such as amide formation or click chemistry and are thus useful (3 + 1) scaffolds for medicinal and material chemistry.

关键词： ORGANOZINC compounds   CARBOXYLATES   CRYSTAL structure   THIN films   CHEMICAL vapor deposition   LOW pressure (Science)   SOLID state chemistry   SYNTHESIS (Chemistry)  

摘要： The organozinc fluorocarboxylates RZnO2CRf and RZnO2CRf center dot TMEDA, along with Zn(O2CRf)(2)center dot TMEDA (R = Me, Et;R-f = C2F5, C3F7) have been synthesized. The structures of EtZnO2C2F5 (5), EtZnO2C3F7 (7), EtZnO2C2F5 center dot TMEDA (11), Zn(O2C2F5)(2)center dot TMEDA (13), along with products from the adventitious reaction with either O-2 or H2O, Zn10Me4(OMe)(4)(O2CC2F5)(12) (2), Zn9Et2(O2CC2F5)(12)(O)(2) (6), Zn8Et4(OEt)(4)(O2CC3F7)(6)(O) (8), [Zn(O2CC3F7)(2)center dot TMEDA](2)center dot H2O (15) have been determined. Thin films of oriented ZnO have been deposited on glass substrates by low-pressure chemical vapor deposition (LPCVD) using 3 and 10 as precursors, though no fluorine incorporation in the films was noted. LPCVD using 13 as precursor also yielded fluorine-free ZnO, but lacking the oriented growth observed using 3, 10. However, 5, which exhibits short intermolecular Zn center dot center dot center dot F contacts in the solid state, thermally decomposes to bulk ZnF2.

关键词： 三氟甲基化   中国科学院上海有机化学研究所   碘化反应   苯炔   烃类化合物   银   原位生成   材料化学  

摘要： 含三氟甲基的芳烃类化合物由于其特殊的稳定性和亲脂性在医药、农药、材料化学等领域都有着广泛的应用.中国科学院上海有机化学研究所胡金波课题组利用三氟甲基银对原位生成的苯炔进行三氟甲基化，所得的芳基银中间体被温和的亲电试剂淬灭得到了邻三氟甲基碘苯类化合物．

关键词： 大学化学实验   化学实验课程   教学效果   考核制度   操作技能   材料化学   专业门类   教学质量   大学课堂   学  

摘要： 结合教学实践,介绍作者在长期从事大学化学实验教学实践的基础上,对该课程教学内容,教学方法及考核方式进行有效的改革尝试,结果表明教学体系和方法的改革,及考核制度的更新,大大提高了学生的操作技能和创新意识及能力。

关键词： 材料化学   专业实验   科研结合  

摘要： 本文介绍了黑龙江大学材料化学专业实验课程的一些新举措。依托绝大部分实验指导教师为科研骨干这一事实,材料化学专业实验与科研相结合,在注重基本实验技能的基础上加强探索性实验,极大的提高了学生的学习积极性,并激发了学生的创造热情和求知欲,更加有利于符合新世纪发展需要的培养创新型人才。

关键词： C—PVDF复合材料   化学镀铜   敏化   活化  

摘要： 以C-PVDF复合材料为基材,敏化液为质量浓度10 g/L二氯化锡的盐酸溶液,盐酸的体积浓度为50 mL/L,敏化8 min;活化液为质量浓度10 g/L硝酸银的无水乙醇溶液,无水乙醇的体积浓度为950 mL/L,活化12 min;施镀温度30℃,施镀时间30 min,在C-PVDF复合材料上得到了一层均匀光亮的结合力较好的铜镀层。

关键词： chemical manganese dioxide (CMD)   Na2S2O8   oxidative precipitation   lithium ion battery ternary cathodic material  

摘要： We have conducted studies to produce chemical manganese dioxides (CMDs) from ternary cathodic materials by oxidative precipitation. In this study, a cathodic material was concentrated by pretreatment and leached with sulfuric acid to recover 1 L of a leachate containing 22.0 g/dm(3) of Co, 21.6 g/dm(3) of Mn, 24.2 g/dm(3) of Ni, 9.5 g/dm(3) of Li and 8 mg/dm(3) of Al as valuable metals. For selective oxidative precipitation of Mn (II) the leachate was reacted with 1 equivalent of Na2S2O8 based on the Mn concentration with stirring at 500 rpm at a temperature of 363 K for 18000 s. As a result of the reaction, it was confirmed that the majority of Mn was precipitated from the solution. XRD, PSA, TG-DTA, LECO and ICP analyses were performed to characterize the precipitate. The analytical results revealed the production of a chemical manganese dioxide (CMD) having a chemical composition of 84.60% MnO, 1.40% Co3O4, 0.11% Li2O, 0.25% NiO, 0.02% Al2O3, 0.06% S and 0.52% Na2O, an average particle diameter of 10.7 mu m, a crystal form of gamma-MnO2, and a purity of at least 98%.

关键词： 多元智能理论   网络   设计  

摘要： 本文以优化高等教育传统课堂教授模式为目的,以高分子材料类专业基础课程《功能高分子材料化学》为例,说明用多元智能理论来指导高校网络课程开发的意义。通过采用多元化的评价方式,可以扭转传统教学中仅强调学生语言智能和逻辑数学智能,而忽略其它智能的开发和利用这一问题的现状,使学生通过对网络课程的学习,自主选择相关学习内容,发现并开发自己的智能强项。

关键词： 《大学化学》课程   材料化学专业   教学质量   实践   探索  

摘要： 《大学化学》课程是材料化学专业的第一门专业基础课程。《大学化学》课程的教学质量将直接影响到本专业合格人才的培养。本文从《大学化学》课程教学资源有效效合理的配置、教学实践、课程管理与创新人才培养等方面探讨了提高《大学化学》课程教学质量的有效途径。

关键词： 化学镀镍   工艺配方   正交实验   沉积速率  

摘要： 采用正交实验的方法,研究了碳纤维增强环氧树脂复合材料化学镀Ni-P合金的工艺。通过对镀层结合力、金相组织、沉积速率、硬度等性能的比较,选出最优镀液配方,并对所得最优组镀件进行SEM和EDS分析及耐腐蚀性能测试。通过正交实验得出最佳镀液配方为:硫酸镍30g/L,次磷酸钠25g/L,乳酸20mL/L,乙酸钠15g/L。所得镀层中磷的质量分数为11.88%,是高磷镀层;经耐腐蚀性能检测,该镀层具有良好的耐蚀性。