Confinement of Luminescent Guests in Metal–Organic Frameworks: Understanding Pathways from Synthesis and Multimodal Characterization to Potential Applications of LG@MOF Systems,Chemical Reviews

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Confinement of Luminescent Guests in Metal–Organic Frameworks: Understanding Pathways from Synthesis and Multimodal Characterization to Potential Applications of LG@MOF Systems
Chemical Reviews ( IF 51.4 ) Pub Date : 2022-04-15 , DOI: 10.1021/acs.chemrev.1c00980
Mario Gutiérrez _{1,

2} , Yang Zhang ₁ , Jin-Chong Tan ₁

Affiliation

This review gives an authoritative, critical, and accessible overview of an emergent class of fluorescent materials termed “LG@MOF”, engineered from the nanoscale confinement of luminescent guests (LG) in a metal–organic framework (MOF) host, realizing a myriad of unconventional materials with fascinating photophysical and photochemical properties. We begin by summarizing the synthetic methodologies and design guidelines for representative LG@MOF systems, where the major types of fluorescent guest encompass organic dyes, metal ions, metal complexes, metal nanoclusters, quantum dots, and hybrid perovskites. Subsequently, we discuss the methods for characterizing the resultant guest–host structures, guest loading, photophysical properties, and review local-scale techniques recently employed to elucidate guest positions. A special emphasis is paid to the pros and cons of the various methods in the context of LG@MOF. In the following section, we provide a brief tutorial on the basic guest–host phenomena, focusing on the excited state events and nanoscale confinement effects underpinning the exceptional behavior of LG@MOF systems. The review finally culminates in the most striking applications of LG@MOF materials, particularly the “turn-on” type fluorochromic chemo- and mechano-sensors, noninvasive thermometry and optical pH sensors, electroluminescence, and innovative security devices. This review offers a comprehensive coverage of general interest to the multidisciplinary materials community to stimulate frontier research in the vibrant sector of light-emitting MOF composite systems.

中文翻译：

金属有机框架中发光客体的限制：了解 LG@MOF 系统从合成和多模态表征到潜在应用的途径

这篇综述对一种被称为“LG@MOF”的新兴荧光材料进行了权威、关键和易于理解的概述，该材料是通过将发光客体 (LG) 纳米级限制在金属有机框架 (MOF) 主体中而设计的，实现了无数的用途。具有令人着迷的光物理和光化学特性的非常规材料。我们首先总结了代表性 LG@MOF 系统的合成方法和设计指南，其中荧光客体的主要类型包括有机染料、金属离子、金属配合物、金属纳米团簇、量子点和杂化钙钛矿。随后，我们讨论了表征所得客主结构、客体负载、光物理性质的方法，并回顾了最近用于阐明客体位置的局部尺度技术。特别强调了 LG@MOF 背景下各种方法的优缺点。在下一节中，我们将提供有关基本宾主现象的简要教程，重点关注支撑 LG@MOF 系统异常行为的激发态事件和纳米级限制效应。审查最终得出了 LG@MOF 材料最引人注目的应用，特别是“开启”型荧光化学和机械传感器、无创测温和光学 pH 传感器、电致发光和创新安全设备。这篇综述全面涵盖了多学科材料界的普遍兴趣，以促进发光 MOF 复合材料系统这一充满活力的领域的前沿研究。

更新日期：2022-04-15

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