国内外为了生产结晶度更高的聚丙烯,大家都在研究合成使用效果更好的外给电子体.试验制备合成了异丁基环己基二甲氧基硅烷,正丙基三甲氧基硅烷和正丙基三乙氧基硅烷三种外给电子体,通过测定最佳反应时间,最适宜的反应温度和最佳的pH值,来测定合成产率最高的三种外给电子体的最优试验条件.

我校作为国家第三批现代学徒制试点院校,与万华集团合作进行在精细化工专业现代学徒制试点招生."精细化学品分析"课程作为精细化工专业的专业核心课,是本次学徒制人才培养模式下重点改革课程.在目前精细化学品分析课程理实一体化授课方式的基础上,以现代学徒制培养模式为基础,对本课程进行模块化教学改革.采用"模块化"课程体系有利于校企协同育人的落地,有利于课程内容的动态更新,有利于发展学生的职业生涯.

外给电子体是合成聚丙烯的重要的成分之一,选用合适的外给电子体,可以生产等规度更高,作用效果更好的聚丙烯.目前,中国外给电子体种类很多,业界希望能研究出一种效率更高,效果更好的外给电子体.为此,本试验进行了三种外给电子体的合成,试验出产率最高的温度和时间.

合成了有机荧光探针分子INDOLE,通过荧光测试表明,该化合物可以在无水乙醇溶剂中有效地选择性识别铜离子,其它一些金属离子包括K+,Na+,Ca2+,Cr3+,Mg2+,Zn2+,Al3+和Fe3+对Cu2+测定的干扰较小,实验证明INDOLE对铜离子具有荧光选择性,并且随着铜离子浓度的增加荧光强度逐渐减弱.通过Benesi-Hildebrand方程可知INDOLE与铜离子形成了1:1型配合物,络合常数K=3.34×105 M.

Higher vocational textbook should reflect the charac-teristics of higher vocational education, should insist on appropriate theory, application of systematic, practice guidance, nature of the content. According to the research and practice in higher vocational teaching material construction, to the development of Fine Chemical Production Technology teaching material as an example, describes the status of teaching, the editing thoughts and practice effect, has the certain reference significance for higher vocational textbook compilation.

AbstractThe new fluorescent sensor (I) exhibits good selectivity for Cu2+ ion in the 10‐7 to 10‐5 M range over other cations such as K+, Na+, Ca2+, Cr2+, Mg2+, Zn2+, Al3+, and Fe3+ in ethanol.

A new fluorescent sensor 1 was designed and synthesized through the condensation of indole-3-aldehyde and N-(2-hydroxyethyl)ethylenediamine. It exhibits good sensitivity and selectivity for the copper cation over other cations such as K+, Na+, Ca2+, Cr2+, Mg2+, Zn2+, Al3+ and Fe3+. The fluorescence intensity of the sensor was decreased with increasing the concentration of Cu2+. The analysis of the Benesi-Hildebrand equation indicated the formation 1: 1 complex of 1 and Cu2+ with association constant K-ass = 3.34 x 10(5) M.

In this work, quinoline group modified multifunctional silica nanoparticles having high magnetization and excellent Zn2+ selectivity have been successfully prepared. These multifunctional nanoparticles were characterized by high resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy (FT-IR), thermal gravimetric analysis (TGA), X-ray powder diffraction (XRD) and vibrating sample magnetometer (VSM). The characterization data indicated that the organic ligand was successfully grafted on the surface of the magnetic silica nanoparticles. The fluorescent properties of the nanosensor were characterized and employed to detect Zn2+ with excellent selectivity and sensitivity (0.1μM) toward Zn2+ over other cations even in trace amount.

In this study, highly ordered mesoporous silica material (SBA-15) functionalized with N-(quinoline-8-yl)-2-(3-triethoxysilyl-propylamino)-acetamide (QTPA) as zinc probe has been reported. The anchoring to the surface of the SBA-15 was carried out by the reaction between the precursor and the hydroxyl groups available on the inner surface of the support. The primary ordered mesoporous structure of SBA-15 was well preserved after the grafting procedure. Fluorescence characterization showed that the obtained organic–inorganic hybrid composite displayed highly selective and sensitive to Zn2+ ion over other cations such as Cd2+, Pb2+, Ni2+ and Co2+. And the hybrid material has ideal chemical and spectroscopic properties for further biological and environmental applications.

A carbon nanotube-based fluorescent chemosensor MWNTs-glycine-N-8-quinolylamide (MWNTs-GNQ) has been designed and synthesized. Steady-state fluorescence emission studies showed that this material displays high selectivity and sensitivity for the Cu2+ ion over other cations such as Zn2+, Cd2+, Mg2+, Ca2+, and Ni2+.