Control of conformational effects in layered kagome MOF films and systematic access to their use in electronic applications

层状 kagome MOF 薄膜构象效应的控制及其在电子应用中的系统应用

• 批准号: 434439119
• 负责人: Dr. Renhao Dong, Ph.D.
• 金额: --
• 依托单位: I. Physikalisches Institut - Festkörper- und Tieftemperaturphysik -
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/434439119?language=en
• 关键词: Control; conformational; effects; layered; kagome

Layered conjugated metal-organic frameworks, characterized with strong in-plane conjugation and weak out-plane van der Waals force, have emerged as promising playground for realizing of electrically conductive materials and show large promise for delicate electronic applications such as reliable field-effect transistors, spintronic devices or possibly might even show superconductivity. However, up to now this principle promise has not been put into reality. One of the key challenges faced by the scientific community is, to synthesize layered conjugated MOFs with high structural control at the atomic or molecular level to dial-in specific electronic properties. In this respect, progress can be only reached in coordinated programs as in the COORNETs SPP and if synthetic chemistry and condensed matter physics join forces – as done in the here proposed project.The ambitious goal of the proposal is to develop hydrogen-free kagome 2D conjugated MOF (2D c-MOF) films with controlled layer orientation and functionality as for example tuned by choice of ligands and layer stacking motive on the one side. To this end, we aim to control lattice structures like geometries, pore sizes and metal-metal distances thus achieving in-plane engineering of charge and spin distribution. To achieve the out-of-plane conformational engineering, i.e., the layer orientation/stacking control in MOF films, a great effort will be devoted into the development of various synthetic methodologies, including the Langmuir-Blodgett-assisted on-water synthesis and soft-template-assisted interfacial synthesis. On the other side, we aim to develop a systematic methodology to analyze the electronic properties of the to-be-developed novel MOFs via charge transport experiments. To this end, we will develop nanoscale contacting schemes using high-resolution lithography to access DC-charge transport properties. After an initial screening phase to develop the best contacting schemes and single out the best MOFs, we will investigate Hall effect, the use of MOFs as thin-film transistors in flexible electronic applications, spin transport, superconductive or memristive properties or their use as gas sensors. We will further use non-contact THz-scanning near field microscopy to access the local AC conductivity.As key achievements, we expect to establish novel electronic structures and reliable synthesis strategies, delineation of reliable structure-transport relationships to demonstrate the superior charge transport performance of novel kagome MOF films. Our work will establish kagome MOFs as versatile electronic material.

层状共轭金属有机框架具有强的面内共轭和弱的面外范德华力的特点，已成为实现导电材料的有前途的平台，并在精密电子应用中显示出巨大的希望，如可靠的场效应晶体管，自旋电子器件，甚至可能显示超导性。然而，到目前为止，这一原则承诺尚未付诸实现。科学界面临的关键挑战之一是，如何在原子或分子水平上合成具有高结构控制的层状共轭mof，以获得特定的电子性能。在这方面，只有像COORNETs SPP这样的协调项目才能取得进展，如果合成化学和凝聚态物理联合起来——就像这里提议的项目一样。该提案的雄心勃勃的目标是开发无氢kagome 2D共轭MOF （2D c-MOF）薄膜，其层取向和功能可控制，例如通过选择配体和一侧的层堆叠动机来调整。为此，我们的目标是控制晶格结构，如几何形状、孔径和金属-金属距离，从而实现电荷和自旋分布的平面内工程。为了实现MOF薄膜的面外构象工程，即层向/叠加控制，将大力发展各种合成方法，包括langmuir - blodgett辅助的水上合成和软模板辅助的界面合成。另一方面，我们的目标是开发一种系统的方法，通过电荷输运实验来分析待开发的新型mof的电子特性。为此，我们将利用高分辨率光刻技术开发纳米级接触方案，以获取直流电荷的输运特性。经过最初的筛选阶段，以开发最佳的接触方案并挑选出最佳的mof，我们将研究霍尔效应，mof作为薄膜晶体管在柔性电子应用中的应用，自旋输运，超导或记忆性或它们作为气体传感器的使用。我们将进一步使用非接触式太赫兹扫描近场显微镜来获取局部交流电导率。作为关键成果，我们期望建立新的电子结构和可靠的合成策略，描述可靠的结构-输运关系，以证明新型kagome MOF薄膜优越的电荷输运性能。我们的工作将使kagome mof成为多功能电子材料。