發(fā)布時間：2018-10-26 17:00

【摘要】：二維層狀材料,由于其空間各向異性及亞微米尺度的超薄厚度引起科學(xué)家的廣泛興趣,在功能納米材料研究領(lǐng)域展現(xiàn)了強(qiáng)大的應(yīng)用前景。本論文采用層層自組裝技術(shù),將不同電性的無機(jī)礦物層板組裝形成微納米電場環(huán)境,并通過調(diào)控?zé)o機(jī)層板上的元素組成在層間引入磁場,最終探究微納米電場及磁場環(huán)境共同影響層間有機(jī)光功能客體光學(xué)性能的作用機(jī)制。主要研究內(nèi)容如下:(1)選用非磁性類水滑石、蒙脫石與陰離子熒光聚合物,通過層層自組裝技術(shù)構(gòu)筑光功能型薄膜材料。通過對所獲得樣品進(jìn)行測試,發(fā)現(xiàn)由電性相反的納米層板構(gòu)筑的微納米電場環(huán)境能夠?qū)娱g為陰離子聚合物薄膜材料的熒光壽命提升2.5倍以上,該發(fā)現(xiàn)首次證實(shí)微納米電場環(huán)境對陰離子熒光聚合物的分子共軛結(jié)構(gòu)存在顯著影響,并拓展了有機(jī)熒光分子壽命提升的新機(jī)制。(2)為研究微納米電場環(huán)境與磁場環(huán)境對層間有機(jī)光功能客體光學(xué)性能的雙重耦合作用,本文選用過渡金屬鎳鐵型類水滑石、蒙脫石與系列有機(jī)熒光物質(zhì),通過層層自組裝技術(shù)構(gòu)筑光功能型薄膜材料。由于微納米電場環(huán)境及磁場環(huán)境的雙重耦合作用,層間為陽離子小分子薄膜材料的熒光壽命竟延長了45倍之多,而層間為陰離子聚合物的薄膜材料也提升到3倍左右。因此本文充分證實(shí)首次提出的微納米電場環(huán)境對本身呈不同電性的熒光物質(zhì)均有影響,同時也成功證實(shí)磁場環(huán)境對該類薄膜材料熒光壽命產(chǎn)生有益的影響。(3)為了證實(shí)微納米電場環(huán)境及磁場環(huán)境對熒光物質(zhì)具有普適性,通過調(diào)控類水滑石層板的金屬陽離子,選取不同元素的過渡金屬型類水滑石與蒙脫石、陰離子熒光聚合物或陽離子熒光小分子,通過層層自組裝技術(shù)構(gòu)筑光功能型薄膜材料。由于微納米電場環(huán)境及磁場環(huán)境的雙重耦合作用,無論層間為陽離子還是陰離子光功能客體的薄膜材料,其熒光壽命均得到大幅提升,成功證實(shí)微納米電場及磁場環(huán)境對層間存在有機(jī)光功能客體的薄膜材料熒光性能的影響具有普適性,為構(gòu)筑新型礦物基光功能型薄膜材料提供了新的方法,為光學(xué)材料的深入研究開拓了新的方向。
[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.
【學(xué)位授予單位】：中國地質(zhì)大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB383.2

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