过渡金属取代的多酸基功能材料的设计、合成及其液晶与光催化性能研究

发布时间：2018-04-08 08:53

本文选题：多金属氧酸盐　切入点：热致液晶　出处：《东北师范大学》2016年硕士论文

【摘要】：高核多金属氧簇由于它在结构、尺寸上以及性能上的多样性,使得其在液晶、电化学、磁性、光催化等领具有极为广范的应用。因此,合成出新型的高核金属氧簇并以此为基础设计合成高核多金属氧簇基功能材料并对其性能进行研究,是目前此领域的研究热点。本论文主要对高核多金属氧簇基功能材料的设计、合成及其性质进行探究。本论文采用常规合成法分别合成了1例三缺位的高核多金属磷酸盐化合物和1例二缺位的高核多金属硅酸盐化合物。对晶体进行了单晶X-射线、热重、XRD、红外等分析从而对晶体结构进行相应的表征与分析,在此基础上,对晶体的性质进行研究,如液晶性质、光催化性质等。1.采用常规法参照文献合成了以P原子作为杂原子的1例三缺位高核钨磷酸盐K_5Na_(11)[Ni_9(OH)_3(H_2O)_6(HPO_4)_2(PW_9O_(34))_3]·52H_2O(1)用双十八烷基二甲基氯化铵(DODAC1)作为表面活性剂与化合物1中抗衡阳离子进行离子交换得到了一例具有热质液晶性质的分子复合物,其分子式如下：(DODA)_(16)[Ni_9(OH)_3(H_2O)_6(HPO_4)_2(PW_9O_(34))_3]·36H_2O(SEP-1)2.采用常规法合成了以Si原子为杂原子的1例二缺位的高核多金属钨硅酸盐Na_(12)[{β-SiCo_2W_(10)O_(36)(OH)_2(H_2O)}_2]·18H_2O(2)化合物2是以Si原子作为杂原子的一例二缺位的高核多金属钨硅酸盐化合物,其内部包含一个{Co_4)簇。两个[SiW10O37]10-通过中心的{Co4)簇连接成一个二缺位的夹心型结构。在可见光的辐照下,化合物2拥有很好的可见光催化产氢的性质。3.从过渡金属功能化的同多铌酸盐、过渡金属功能化的杂多铌酸盐、无机缺位多钨酸盐分离出铌簇化合物以及多铌酸盐的应用这四大模块出发,对多铌酸盐进行介绍和总结,为合成更多结构新颖的、性能优异的多铌酸盐提供了非常有用的信息。
[Abstract]:Due to its diversity in structure, size and performance, high nucleated polyoxometallic clusters have been widely used in liquid crystal, electrochemistry, magnetism, photocatalysis and so on.Therefore, it is a hot research field to synthesize new high nuclear oxometallic oxide clusters and design and synthesize high core polyoxometallic oxide cluster based functional materials and study their properties.In this paper, the design, synthesis and properties of high-core polyoxometallic cluster-based functional materials are studied.In this paper, a high nuclear polymetallic phosphate compound with three vacancies and a high nucleus polymetallic silicate compound with a divacancy were synthesized by conventional synthesis method.The crystal structure was characterized and analyzed by single crystal X-ray, thermogravimetric XRD, IR and so on. On the basis of this, the crystal properties, such as liquid crystal properties, photocatalytic properties and so on, were studied.In turn, a molecular complex with the properties of a thermally liquid crystal is obtained.Its molecular formula is as follows: 1. Dodas (16) [Ni_9(OH)_3(H_2O)_6(HPO_4)_2(PW_9O_(34))_3] 36H _ 2O _ 2 / SEP-1.Two [SiW10O37] 10-connected by the central {Co 4] cluster form a double vacancy sandwich structure.Under visible light irradiation, compound 2 has a good visible light catalytic property of hydrogen production. 3.From the four modules of transition metal functionalized homopolyniobate, transition metal functionalized heteropolyniobate, inorganic vacancy polytungstate to separate niobium cluster compound and application of polyniobate, this paper introduces and summarizes polyniobate.It provides very useful information for the synthesis of more novel polyniobate with excellent properties.
【学位授予单位】：东北师范大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：O643.36

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