Recent advances in covalent organic frameworks (COFs) as a smart sensing material

Author(s): Xigui Liu ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Danlian Huang ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Cui Lai ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Guangming Zeng ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Lei Qin ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Han Wang ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Huan Yi ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Bisheng Li ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Shiyu Liu ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Mingming Zhang ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Rui Deng ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Yukui Fu ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Ling Li ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Wenjing Xue ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵ , Sha Chen ¹ ^, ² ^, ³ ^, ⁴ ^, ⁵

Publication date (Electronic): 2019

Journal: Chemical Society Reviews

Publisher: Royal Society of Chemistry (RSC)

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Abstract

Recent advances in covalent organic frameworks (COFs) as a smart sensing material are summarized and highlighted.

Abstract

As a newly emerging kind of porous material, covalent organic frameworks (COFs) have drawn much attention because of their fascinating structural features ( e.g., divinable structure, adjustable porosity and total organic backbone). Since the seminal work of Yaghi and co-workers reported in 2005, the COF materials have shown superior potential in diverse applications, such as gas storage, adsorption, optoelectronics, catalysis, etc. Recently, COF materials have shown a new trend in sensing fields. This critical review briefly describes the synthesis routes for COF powders and thin films. What's more, the most fascinating and significant applications of COFs in sensing fields including explosive sensing, humidity sensing, pH detection, biosensing, gas sensing, metal ion sensing, and other substance sensing are summarized and highlighted. Finally, the major challenges and future trends of COFs with respect to their preparation and sensing applications are discussed.

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Porous, crystalline, covalent organic frameworks.

Adrien P Côté, Annabelle I Benin, Nathan W Ockwig … (2005)

Covalent organic frameworks (COFs) have been designed and successfully synthesized by condensation reactions of phenyl diboronic acid {C6H4[B(OH)2]2} and hexahydroxytriphenylene [C18H6(OH)6]. Powder x-ray diffraction studies of the highly crystalline products (C3H2BO)6.(C9H12)1 (COF-1) and C9H4BO2 (COF-5) revealed expanded porous graphitic layers that are either staggered (COF-1, P6(3)/mmc) or eclipsed (COF-5, P6/mmm). Their crystal structures are entirely held by strong bonds between B, C, and O atoms to form rigid porous architectures with pore sizes ranging from 7 to 27 angstroms. COF-1 and COF-5 exhibit high thermal stability (to temperatures up to 500 degrees to 600 degrees C), permanent porosity, and high surface areas (711 and 1590 square meters per gram, respectively).

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Leslie Murray, Mircea Dincă, Jeffrey R Long (2009)

New materials capable of storing hydrogen at high gravimetric and volumetric densities are required if hydrogen is to be widely employed as a clean alternative to hydrocarbon fuels in cars and other mobile applications. With exceptionally high surface areas and chemically-tunable structures, microporous metal-organic frameworks have recently emerged as some of the most promising candidate materials. In this critical review we provide an overview of the current status of hydrogen storage within such compounds. Particular emphasis is given to the relationships between structural features and the enthalpy of hydrogen adsorption, spectroscopic methods for probing framework-H(2) interactions, and strategies for improving storage capacity (188 references).

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Metal-organic frameworks (MOFs) are a unique class of crystalline solids comprised of metal cations (or metal clusters) and organic ligands that have shown promise for a wide variety of applications. Over the past 15 years, research and development of these materials have become one of the most intensely and extensively pursued areas. A very interesting and well-investigated topic is their optical emission properties and related applications. Several reviews have provided a comprehensive overview covering many aspects of the subject up to 2011. This review intends to provide an update of work published since then and focuses on the photoluminescence (PL) properties of MOFs and their possible utility in chemical and biological sensing and detection. The spectrum of this review includes the origin of luminescence in MOFs, the advantages of luminescent MOF (LMOF) based sensors, general strategies in designing sensory materials, and examples of various applications in sensing and detection.