层层自组装技术构筑新型矿物基光功能型薄膜材料
发布时间：2018-10-26 17:00
【摘要】：二维层状材料,由于其空间各向异性及亚微米尺度的超薄厚度引起科学家的广泛兴趣,在功能纳米材料研究领域展现了强大的应用前景。本论文采用层层自组装技术,将不同电性的无机矿物层板组装形成微纳米电场环境,并通过调控无机层板上的元素组成在层间引入磁场,最终探究微纳米电场及磁场环境共同影响层间有机光功能客体光学性能的作用机制。主要研究内容如下:(1)选用非磁性类水滑石、蒙脱石与阴离子荧光聚合物,通过层层自组装技术构筑光功能型薄膜材料。通过对所获得样品进行测试,发现由电性相反的纳米层板构筑的微纳米电场环境能够将层间为阴离子聚合物薄膜材料的荧光寿命提升2.5倍以上,该发现首次证实微纳米电场环境对阴离子荧光聚合物的分子共轭结构存在显著影响,并拓展了有机荧光分子寿命提升的新机制。(2)为研究微纳米电场环境与磁场环境对层间有机光功能客体光学性能的双重耦合作用,本文选用过渡金属镍铁型类水滑石、蒙脱石与系列有机荧光物质,通过层层自组装技术构筑光功能型薄膜材料。由于微纳米电场环境及磁场环境的双重耦合作用,层间为阳离子小分子薄膜材料的荧光寿命竟延长了45倍之多,而层间为阴离子聚合物的薄膜材料也提升到3倍左右。因此本文充分证实首次提出的微纳米电场环境对本身呈不同电性的荧光物质均有影响,同时也成功证实磁场环境对该类薄膜材料荧光寿命产生有益的影响。(3)为了证实微纳米电场环境及磁场环境对荧光物质具有普适性,通过调控类水滑石层板的金属阳离子,选取不同元素的过渡金属型类水滑石与蒙脱石、阴离子荧光聚合物或阳离子荧光小分子,通过层层自组装技术构筑光功能型薄膜材料。由于微纳米电场环境及磁场环境的双重耦合作用,无论层间为阳离子还是阴离子光功能客体的薄膜材料,其荧光寿命均得到大幅提升,成功证实微纳米电场及磁场环境对层间存在有机光功能客体的薄膜材料荧光性能的影响具有普适性,为构筑新型矿物基光功能型薄膜材料提供了新的方法,为光学材料的深入研究开拓了新的方向。
[Abstract]:Due to their spatial anisotropy and ultrathin thickness of submicron scale, two-dimensional layered materials have attracted extensive interest in the research of functional nanomaterials. In this paper, layer by layer self-assembly technique was used to assemble inorganic mineral laminates with different electrical properties to form a micro-nano electric field environment, and the magnetic field was introduced into the layers by regulating the composition of the elements on the inorganic laminates. Finally, the mechanism of the effect of micro- and nano-electric field and magnetic field on the optical properties of the functional guest of interlaminar organic light is explored. The main research contents are as follows: (1) Non-magnetic hydrotalcite, montmorillonite and anionic fluorescent polymer were used to fabricate photofunctional thin films by layer self-assembly technique. By testing the samples obtained, it is found that the micro-nano electric field environment constructed by the electrically opposite nanometer laminates can increase the fluorescence lifetime of the anionic polymer films by more than 2.5 times. It is the first time that the micronano electric field environment has a significant effect on the molecular conjugation structure of anionic fluorescent polymers. In order to study the double coupling effect of micro-nanometer electric field environment and magnetic field environment on the optical properties of the functional guest of organic light between layers, the transition metal nickel-ferric hydrotalcite is selected in this paper. Montmorillonite and a series of organic fluorescent materials were fabricated by layer self-assembly technique. Due to the double coupling of micro- and nanoscale electric field and magnetic field, the fluorescence lifetime of the interlayer cationic small molecule thin film is prolonged by 45 times, and the interlayer anion polymer film material is increased to about 3 times. Therefore, it is fully confirmed in this paper that the first proposed micro- and nano-electric field environment has an effect on the fluorescent substances which have different electrical properties. At the same time, it has been proved that the magnetic field environment has a beneficial effect on the fluorescence lifetime of this kind of thin film. (3) in order to verify the universality of the fluorescent material in the micronano electric field environment and the magnetic field environment, the metal cations of the hydrotalcite-like laminates are regulated. Optically functional thin films were fabricated by layer self-assembly technique with transition metal-like hydrotalcite, montmorillonite, anionic fluorescent polymers or cationic fluorescent small molecules with different elements. Due to the double coupling of micro- and nanoscale electric field and magnetic field, the fluorescence lifetime of the films with cationic or anionic functional guest is greatly improved. It has been proved that the influence of the environment of micro and nano electric field and magnetic field on the fluorescence properties of thin film materials with organic light function guest between layers is universal, which provides a new method for the construction of new mineral based optical functional thin film materials. It opens up a new direction for the further study of optical materials.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.2
[Abstract]:Due to their spatial anisotropy and ultrathin thickness of submicron scale, two-dimensional layered materials have attracted extensive interest in the research of functional nanomaterials. In this paper, layer by layer self-assembly technique was used to assemble inorganic mineral laminates with different electrical properties to form a micro-nano electric field environment, and the magnetic field was introduced into the layers by regulating the composition of the elements on the inorganic laminates. Finally, the mechanism of the effect of micro- and nano-electric field and magnetic field on the optical properties of the functional guest of interlaminar organic light is explored. The main research contents are as follows: (1) Non-magnetic hydrotalcite, montmorillonite and anionic fluorescent polymer were used to fabricate photofunctional thin films by layer self-assembly technique. By testing the samples obtained, it is found that the micro-nano electric field environment constructed by the electrically opposite nanometer laminates can increase the fluorescence lifetime of the anionic polymer films by more than 2.5 times. It is the first time that the micronano electric field environment has a significant effect on the molecular conjugation structure of anionic fluorescent polymers. In order to study the double coupling effect of micro-nanometer electric field environment and magnetic field environment on the optical properties of the functional guest of organic light between layers, the transition metal nickel-ferric hydrotalcite is selected in this paper. Montmorillonite and a series of organic fluorescent materials were fabricated by layer self-assembly technique. Due to the double coupling of micro- and nanoscale electric field and magnetic field, the fluorescence lifetime of the interlayer cationic small molecule thin film is prolonged by 45 times, and the interlayer anion polymer film material is increased to about 3 times. Therefore, it is fully confirmed in this paper that the first proposed micro- and nano-electric field environment has an effect on the fluorescent substances which have different electrical properties. At the same time, it has been proved that the magnetic field environment has a beneficial effect on the fluorescence lifetime of this kind of thin film. (3) in order to verify the universality of the fluorescent material in the micronano electric field environment and the magnetic field environment, the metal cations of the hydrotalcite-like laminates are regulated. Optically functional thin films were fabricated by layer self-assembly technique with transition metal-like hydrotalcite, montmorillonite, anionic fluorescent polymers or cationic fluorescent small molecules with different elements. Due to the double coupling of micro- and nanoscale electric field and magnetic field, the fluorescence lifetime of the films with cationic or anionic functional guest is greatly improved. It has been proved that the influence of the environment of micro and nano electric field and magnetic field on the fluorescence properties of thin film materials with organic light function guest between layers is universal, which provides a new method for the construction of new mineral based optical functional thin film materials. It opens up a new direction for the further study of optical materials.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.2
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