本文選題：層層組裝 + 電化學(xué)�。� 參考：《東北師范大學(xué)》2015年碩士論文

【摘要】：基于自下而上(bottom-up)的自組裝修飾制備具有納米尺度結(jié)構(gòu)的功能化材料越來越受到化學(xué)、物理、材料科學(xué)等學(xué)科的關(guān)注。層層組裝(Layer-by-Layer Assembly,Lb L)是一種能夠在分子尺度上調(diào)控復(fù)合物層狀結(jié)構(gòu)的制備方法,并因其通用,簡(jiǎn)單,低消耗及組裝快速等優(yōu)點(diǎn)備受研究者關(guān)注。層層組裝的高度通用性和兼容性持續(xù)創(chuàng)造著新概念、新材料,新方法和新應(yīng)用。然而,傳統(tǒng)層層組裝方法要求兩種被組裝分子之間具有互補(bǔ)的相互作用力(如靜電,氫鍵給體和受體,電子給體和受體相互作用等)作為成膜的驅(qū)動(dòng)力。這個(gè)特點(diǎn)阻礙了層層組裝方法有效調(diào)控薄膜垂直結(jié)構(gòu)的能力,并且很難制備沒有輔助組裝分子的單組份多層薄膜。在本論文中,我們將N-烷基咔唑基團(tuán)的電化學(xué)偶聯(lián)反應(yīng),代替兩分子間互補(bǔ)的相互作用引入到納米粒子層層組裝領(lǐng)域,制備了單組份納米粒子薄膜并方便的調(diào)控多種納米粒子復(fù)合物薄膜的垂直組分。具體內(nèi)容包括:(1)設(shè)計(jì)并合成了兩種帶咔唑基團(tuán)的有機(jī)小分子配體8-(9氫-咔唑-9-基)辛基-1-磷酸(COPA)和6-(9氫-咔唑-9-基)己基-1-硫醇(CHT),利用原位修飾和后續(xù)配體交換的方法將電活性咔唑基團(tuán)修飾到Pb S、Cd S、Au納米粒子表面,得到了可電化學(xué)聚合的納米材料。(2)基于N-烷基咔唑配體的電化學(xué)偶聯(lián)反應(yīng),應(yīng)用循環(huán)伏安方法制備了單組份納米粒子Lb L薄膜;通過調(diào)節(jié)循環(huán)伏安的掃描圈數(shù)控制偶聯(lián)程度,成功制備了多種納米粒子體相雜化薄膜和納米層狀結(jié)構(gòu)。這種簡(jiǎn)單的電化學(xué)偶聯(lián)層層組裝過程能夠制備透明,穩(wěn)定的光活性納米粒子薄膜,并將這種溶液態(tài)非真空條件下加工的薄膜應(yīng)用到光伏器件中,初步研究了其作為光探測(cè)器的性能。
[Abstract]:Self-assembly modification based on bottom-up (bottom-up) has attracted more and more attention in chemistry, physics, material science and so on. Layer-by-Layer assembly LbL (LbL) is a preparation method that can regulate the lamellar structure of composites on molecular scale, and has attracted much attention for its advantages of generality, simplicity, low consumption and fast assembly. Layer-upon-layer assembly with high versatility and compatibility continues to create new concepts, new materials, new methods and new applications. However, the traditional layer-by-layer assembly method requires complementary interaction between the two assembled molecules (such as electrostatic, hydrogen bond donor and receptor, electron donor and receptor interaction) as the driving force of film formation. This feature hinders the ability of layer-by-layer assembly method to effectively regulate the vertical structure of thin films, and it is difficult to prepare single component multilayer films without auxiliary assembly molecules. In this thesis, the electrochemical coupling reaction of N-alkyl carbazole group was introduced into the field of layered assembly of nanocrystalline particles instead of the complementary interaction between the two molecules. The single component nanoparticle films were prepared and the vertical components of the composite films were easily regulated. Two kinds of organic small molecular ligands with carbazole group, 8-f9 hydrocarbazol-9-yl) octyl -1-phosphate (COPAA) and 6-9 hydrocarbazol-9-yl) hexyl-1-mercaptan (CHT) were designed and synthesized, and exchanged by in situ modification and subsequent ligand exchange. The electroactive carbazole group was modified to the surface of Pb Schi-CD Su au nanoparticles. Based on the electrochemical coupling reaction of N-alkyl carbazole ligands, single component nanoparticles LbL thin films were prepared by cyclic voltammetry, and the coupling degree was controlled by adjusting the number of scanning cycles of cyclic voltammetry. A variety of nanocrystalline bulk hybrid films and layered nanostructures have been successfully prepared. This simple electrochemical coupling layer by layer assembly process can be used to prepare transparent and stable photoactive nanoparticles thin films, and the films processed in the solution state in non-vacuum condition can be applied to photovoltaic devices. Its performance as a photodetector is preliminarily studied.
【學(xué)位授予單位】：東北師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TB383

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