Utilization of Physical Anisotropy in Metal–Organic Frameworks via Postsynthetic Alignment Control with Liquid Crystal

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2023-08-01 DOI:10.1021/acs.nanolett.3c02209

Yeongseo Bak, Geonhyeong Park, Taegyun Hong, Changjae Lee, Hongju Lee, Tae-Hyun Bae, Jesse G. Park* and Dong Ki Yoon*,

{"title":"Utilization of Physical Anisotropy in Metal–Organic Frameworks via Postsynthetic Alignment Control with Liquid Crystal","authors":"Yeongseo Bak, Geonhyeong Park, Taegyun Hong, Changjae Lee, Hongju Lee, Tae-Hyun Bae, Jesse G. Park* and Dong Ki Yoon*, ","doi":"10.1021/acs.nanolett.3c02209","DOIUrl":null,"url":null,"abstract":"<p >Metal–organic frameworks (MOFs) represent crystalline materials constructed from combinations of metal and organic units to often yield anisotropic porous structures and physical properties. Postsynthetic methods to align the MOF crystals in bulk remain scarce yet tremendously important to fully utilize their structure-driven intrinsic properties. Herein, we present an unprecedented composite of liquid crystals (LCs) and MOFs and demonstrate the use of nematic LCs to dynamically control the orientation of MOF crystals with exceptional order parameters (as high as 0.965). Unique patterns formed through a facile multidirectional alignment of MOF crystals exhibit polarized fluorescence with the fluorescence intensity of a pattern dependent on the angle of a polarizer, offering potential use in various optical applications such as an optical security label. Further, the alignment mechanism indicates that the method is applicable to numerous combinations of MOFs and LCs, which include UV polymerizable LC monomers used to fabricate free-standing composite films.</p>","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"23 16","pages":"7615–7622"},"PeriodicalIF":9.1000,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nano Letters","FirstCategoryId":"88","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.nanolett.3c02209","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Metal–organic frameworks (MOFs) represent crystalline materials constructed from combinations of metal and organic units to often yield anisotropic porous structures and physical properties. Postsynthetic methods to align the MOF crystals in bulk remain scarce yet tremendously important to fully utilize their structure-driven intrinsic properties. Herein, we present an unprecedented composite of liquid crystals (LCs) and MOFs and demonstrate the use of nematic LCs to dynamically control the orientation of MOF crystals with exceptional order parameters (as high as 0.965). Unique patterns formed through a facile multidirectional alignment of MOF crystals exhibit polarized fluorescence with the fluorescence intensity of a pattern dependent on the angle of a polarizer, offering potential use in various optical applications such as an optical security label. Further, the alignment mechanism indicates that the method is applicable to numerous combinations of MOFs and LCs, which include UV polymerizable LC monomers used to fabricate free-standing composite films.

Abstract Image

查看原文本刊更多论文

利用液晶合成后取向控制在金属-有机骨架中的物理各向异性

金属有机框架(MOFs)是由金属和有机单元组合而成的晶体材料，通常产生各向异性的多孔结构和物理性质。合成后排列MOF晶体的方法仍然很少，但对于充分利用其结构驱动的固有特性非常重要。在此，我们提出了一种前所未有的液晶(lc)和MOF的复合材料，并展示了使用向列型lc来动态控制MOF晶体的取向，其阶数参数高达0.965。通过简单的MOF晶体多向排列形成的独特图案显示出偏振荧光，图案的荧光强度取决于偏振器的角度，在各种光学应用中提供了潜在的用途，例如光学安全标签。此外，对准机制表明该方法适用于mof和LC的多种组合，其中包括用于制造独立复合膜的UV可聚合LC单体。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.