Divergent Electrically Conductive Pathways in Yttrium-Based 2- and 3-Dimensional Metal–Organic Frameworks

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY ACS Materials Letters Pub Date : 2024-07-26 DOI:10.1021/acsmaterialslett.4c01102

Connor Welty, Eoghan L. Gormley, Julius J. Oppenheim, Mircea Dincă, Christopher H. Hendon, Nicholas P. Stadie

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Abstract

Despite most porous framework solids exhibiting insulating character, some are known to conduct electrical charge. The peak performing conductive metal–organic frameworks are composed of redox-active hexasubstituted triphenylene linkers, but the impact of redox activity on material conductivity remains enigmatic because of limited availability of direct structure–function relationships. Here, we report a hexagonal yttrium-based conductive porous scaffold, comprising hexahydroxytriphenylene connected by Y-chains (YHOTP). In comparison to its known porous cubic counterpart (Y₆HOTP₂), this material features a 1000-fold increase in peak conductivity in polycrystalline samples (∼10^–1 S cm^–1). Furthermore, through a comparison of their electronic structures, we rationalize the origin of this difference and highlight the role of charge carrier concentration in dictating bulk electrical conductivity. Together, this work provides a design principle for the development of next-generation conductive porous frameworks.

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钇基二维和三维金属有机框架的不同导电途径

尽管大多数多孔框架固体具有绝缘特性，但已知其中一些可以传导电荷。性能最佳的导电金属有机框架由具有氧化还原活性的六取代三亚苯连接体组成，但由于直接的结构-功能关系有限，氧化还原活性对材料导电性的影响仍然是个谜。在此，我们报告了一种由 Y 链连接的六羟基三亚苯（YHOTP）组成的六方钇基导电多孔支架。与已知的多孔立方材料（Y6HOTP2）相比，这种材料在多晶样品中的峰值电导率提高了 1000 倍（∼10-1 S cm-1）。此外，通过比较它们的电子结构，我们合理地解释了这种差异的根源，并强调了电荷载流子浓度在决定体导电性方面的作用。总之，这项工作为开发新一代导电多孔框架提供了设计原则。

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.