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    题名 作者 年代 出处 被引量
1近年来分子筛研究的某些进展显示文摘介绍了近年来分子筛研究的某些进展,主要涉及新分子筛、纳米分子筛、分子筛膜等,引用文献50篇。王巍 赵瑞雪 陈明贵 胡伟华 关欣 江天肃 翟庆洲 2003长春理工大学学报(自然科学版)2003,26,1:4
2Modification of the adsorption and catalytic properties of micro-and mesoporous materials by reactions with organometallic complexes显示文摘This review describes the work of two laboratories in the field of the modification of micro-and mesoporous molecular sieves through reactions with organometallic complexes.The modification of zeolites can occur inside the pore channels or on the external surface,depending on the size of the organometallic complex.When the modification occurs on the external surface,it results in a decrease of the pore entrance,which will lead in turn to a modification of the sorption properties of the zeolite,by decreasing the rate of the adsorption(mainly by a kinetic control).Such a material can be also used in catalysis,because the external acid sites,which are responsible for side-reactions,have been removed upon grafting.When small organometallic complexes are used,they can fill the channels and cages of the zeolite and react with internal hydroxyl groups.Due to the high acidity of zeolites,the reaction occurs very easily(for example at-100℃ on faujasite),in contrast to what is observed on the external surface,therefore leading to high metal loadings.In that case,the modification of the sorption properties will be mainly related to a thermodynamic control.The resulting materials can be useful in catalysis,by combining the activity of the organometallic complex and properties(for example shape-selectivity) of the zeolite.Modification of mesoporous molecular sieves occurs always in the pores and results in altering of the sorption properties of the solid,by changing the interaction type between the sorbent and the sorbate.For example the sorption isotherm of alkanes is changed from type II to type III according to the IUPAC nomenclature.LEFEBVRE Frédéric PUTAJ Piotr BASSET Jean-Marie 2010Science China Chemistry2010,53,9:4
3烷基锡化合物在HY沸石超笼表面的接枝反应研究显示文摘在高真空系统中研究了HY沸石分子筛与SnMe4、SnEt4、SnPr4和SnBu4的反应,用元素分析、ICP、GC、XRD、FTIR、TG、DRS、TPR、BET及烷烃和芳烃的脉冲吸附等方法表征了产物的组成、结构和性质。结果表明,HY沸石分子筛超笼羟基与SnMe4、SnEt4、SnPr4和SnBu4的反应温度分别为:183K、243K、273K和333K,生成组成为(≡Si鄄O)SnR3的表面单接枝物种。表面接枝烷基锡碎片后,HY沸石的孔口尺寸变小,吸附行为发生显著变化。郑瑛 王绪绪 付贤智 魏可镁 2004无机化学学报2004,20,9:3
4沸石分子筛孔道和表面化学修饰技术研究进展显示文摘沸石分子筛孔道和表面化学修饰是对分子筛进行二次合成的重要手段。本文综述了用离子交换法、化学沉积法和分子反应法等手段对各类沸石分子筛孔道和表面进行化学修饰改性的方法,研究结果表明,孔道和表面化学修饰可以精细调变沸石分子筛的孔道和孔口尺寸,钝化非选择性的表面酸性位,固载活性成分,提高分子筛的反应活性和对目标产物的催化选择性,为设计研制新型功能化的沸石分子筛提供有效的途径。万家峰 侯芬红 周大鹏 李占双 吴伟 2006化学与粘合2006,28,1:3
5SnMe_3/Pt/HY分子筛的合成与表征显示文摘在高真空系统下研究了SnMe4与Pt修饰的HY沸石分子筛表面的接枝反应 ,并用元素分析、FT IR ,XRD ,DRS ,BET ,GC等表征了接枝产物的组成和性质。结果表明 :Pt/HY沸石的表面羟基可以与SnMe4在常温下反应 ,将三甲基锡基团接枝在沸石的超笼中。Pt/HY与SnMe4发生接枝反应后晶相结构没有改变 ,微孔体积和BET表面积都下降。潘丽娟 张晓勤 郑瑛 王绪绪 2004合成化学2004,12,5:0
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