Liquid phase epitaxy (LPE) of functionalized SURMOFs for application in Gas Chromatography

SURMOFs是金属有机框架（MOFs）的结晶取向薄膜，通过采用逐级液相外延生长方案（即逐层生长，lbl）沉积在给定衬底表面（例如由自组装有机单层（sam）修饰）。lbl沉积涉及受控SBU方法（CSA; SBU =二级建筑单元）。本提案中概述的项目目标是将第一个资助期取得的基本成果转移到功能化MOF薄膜上，用于选择性吸附和色谱。这种fu- surmofs （fu =功能化）可以在框架的有机连接体上包含适当选择的侧基，以便定制客体分子或分析物的吸附特性。在各种异质结构中，结合沉积顺序和MOF层的取向，连接处的功能和取代模式会发生变化（多元fu- surmof）。研究了SURMOFs的结构和吸附特性（即吸附等温线，客体分子的扩散常数）。将开发优化的SAMs和lbl生长条件，特别适合在氧化物表面（例如SiO2）上制造SURMOFs。

SURMOFs are crystalline, oriented thin films of Metal Organic Frameworks (MOFs) which are deposited at the surface of given substrates (e.g. modified by Self-assembled organic Monolayers, SAMs) by employing a step by step liquid phase epitaxial growth scheme (i.e. layer by layer growth, lbl). The lbl deposition involves the Controlled SBU Approach (CSA; SBU = Secondary Building Unit). The goal of the project outlined in this proposal is the transfer of the basic results achieved in the first funding period to functionalized MOF thin films for applications in selective adsorption and chromatography. Such fu-SURMOFs (fu = functionalized) may contain suitably chosen side groups at the organic linkers of the framework in order to tailor the adsorption properties for guest molecules or analytes. Various kinds of heterostructures will be fabricated in which the functionality and substitution pattern at the linkers in combination with the deposition sequence and orientation of the MOF layers are varied (multivariate fu-SURMOFs). The structural and adsorption properties of the SURMOFs will be investigated (i.e. adsorption isotherms, diffusion constants of guest molecules). Optimized SAMs and lbl growth conditions, which are particularly suited for the fabrication of SURMOFs on oxide surfaces (e.g. SiO2), will be developed.