搜索结果: 1-15 共查到“知识库 磁化学”相关记录187条 . 查询时间(1.25 秒)
利用光诱导电子转移机理和配位驱动组装策略探索室温光磁效应材料的合成.通过组装稀土硝酸盐与1,10-菲罗啉(phen)获得2种同构双核稀土配合物[Ln2(NO3)6(phen)2](1:Ln=Gd;2:Ln=Dy).由于具有电子给体-受体结构特征,目标产物在光照后发生电子转移,电子由硝酸根的氧原子转移到phen的氮原子,进而产生光生自由基并发生肉眼可见的颜色变化.除光致变色外,配合物1和2在室温下具...
表面定向磁性印迹聚合物的制备及对槲皮素的选择性识别
表面定向印迹 磁性碳纳米管 槲皮素 识别
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2022/3/16
利用硼酸功能化的磁性碳纳米管作为反应基质,采用一种简便、绿色的硼酸亲和表面定向印迹法制备了槲皮素磁性分子印迹聚合物,并将其应用于银杏叶提取物中槲皮素的特异性识别.透射电子显微镜、X射线光电子能谱仪、X射线衍射及振动样品磁强计测试结果表明,制备的分子印迹聚合物具有良好的形貌和晶型结构.吸附实验结果表明,该分子印迹聚合物对模板分子槲皮素具有较好的吸附容量(4.57μg/mg)、良好的印迹效果(IF=8...
磁铁矿广泛出现于各种类型的岩石中，具有反尖晶石结构。Ｓｉ与Ｆｅ无论是从离子半径还是从电子的获取能力上均存
在较大区别，然而无论是利用电子探针分析还是湿化学法，很多研究均表明：磁铁矿晶体中含有一定数量的硅。目前，硅
是否类似于Ａｌ、Ｍｇ、Ｔｉ等元素，以类质同象的方式进入磁铁矿晶格目前尚不明确。已有研究表明Ｓｉ在磁铁矿中的含量对
磁铁矿的生成环境（成矿环境）有较大的指示意义：热液环境中生成的磁铁...
Electric Field Modulation of Electron Transfer Reaction Rates in Isotropic Systems:Long-Distance Charge Recombination in Photosynthetic Reaction Centers
CORROSION PRODUCT NICKEL FERRITE MAGNETITE PH SOLUBILITY PWR STEAM GENERATORS
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2016/5/23
A general method is demonstrated for experimentally obtaining the rate constant of electron transfer as a function of the free energy of the reaction in nonoriented systems. An external electric field...
Multi-nuclear NMR Studies of DNA Hairpins:1. Structure and Dynamics of d(CGCGTTGTTCGCG)
GERMANIUM DETERMINATION HYDRIDE GENERATION INDUCTIVELY COUPLED PLASMA EMISSION SPECTROMETRY MEDICINAL PLANT
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2016/5/20
The solution structure of the hairpin formed by d(CGCGTTGTTCGCG) has been examined in detail by a wide variety of NMR techniques. The hairpin was characterized by proton NMR to obtain interproton dist...
Magnetic Field Effects on Reaction Yields in the Solid-State:An Example from Photosynthetic Reaction Centers
Magnetic Field Reaction Yields in the Solid-State Photosynthetic Reaction Centers
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2016/5/20
Prior to 1970there were several reports of the effects of magneticfields on chemical reactions, though there was muchrebuttal and retraction in this early literature (1-3). Since 1970, the number of r...
Dependence of the Yield of a Radical-Pair Reaction in the Solid State on Orientation in a Magnetic Field
Radical-Pair Reaction Solid State on Orientation Magnetic Field
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2016/5/20
We report the observation that the yield of a radical-pair reaction in the solid state can depend strongly on the orientation of the reactants in a magnetic field. This phenomenon is expected to be qu...
The Effect of Large Magnetic Fields and the g-factor Difference On the Triplet Population in Photosynthetic Reaction Centers
Large Magnetic Fields g-factor Difference Triplet Population Photosynthetic Reaction Centers
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2016/5/20
The tnplet population m reduced photosynthetic reaction cente rs IS found to Increase on application of large magnetic fields (1 S-14 hG) We conclude that the tnplet IS fo rmed by charge recombmatron ...
溶剂热合成法制备的Zn1-xMnxO和Zn1-2xMnxLixO纳米材料的磁学性质
氧化锌 稀磁半导体 顺磁
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2012/1/5
用溶剂热合成法在160oC制备出Zn1-xMnxO纳米棒和Zn1-2xMnxLixO纳米颗粒. XRD和拉曼测试结果表明Mn离子已很好地掺入ZnO母体中. M-H图中未观察到磁回滞，ESR谱中的精细结构说明掺杂的Mn离子间没有铁磁相互作用. 共掺Li仅仅改变了产物的形貌，并不能改变其磁学性质.
溶胶-凝胶法制备(Ca1-xMgx)SiO3陶瓷及其微波介电性能
微波介电性能 陶瓷 (Ca1-xMgx)SiO3 溶胶-凝胶法
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2010/1/26
溶胶-凝胶法制备(Ca1-xMgx)SiO3陶瓷及其微波介电性能。
Preparation and characterization of magnetic chitosan nanospheres
Chitosan magnetite magnetic particles biocompatible
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2010/4/8
A method for the preparation of magnetite/chitosan composite nanoparticles was developed. Colloidal magnetite particles (Fe3O4 produced by co-precipitation and stabilized in suspension by adding a non...
在分散聚合法制备复合磁性微球过程中,采用硅烷偶联剂KH570对磁性Fe3O4微粒进行表面改性.红外光谱(FTIR)、光电子能谱(XPS)分析结果表明,偶联剂与磁性微粒表面以化学键形式结合.改性后,Fe3O4微粒与单体及其聚合物之间具有良好的亲和性,采用改性后的磁性微粒可以显著改善磁性微球的性能指标.
光解苯半醌和2-羟基-2-丙基自由基的CIDEP谱
化学诱导动态电子极化 时间分辨电子自旋共振 光解苯半醌自由基 光解2-羟基-2-丙基自由基
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2009/12/7
用高时间分辨ESR波谱仪测量了光解苯半醌和2－羟基－2－丙基自由基的CIDEP谱，苯半醌自由基的CIDEP属TM机理．实验研究了微波功率、溶液浓度对苯半醌自由基的CIDEP谱时间演化的影响．2－羟基－2－丙基自由基的CIDEP属RPM机理，实验研究了自旋极化的生成环境．