Water-Soluble Self-Assembled Cage with Triangular Metal–Metal-Bonded Units Enabling the Sequential Selective Separation of Alkanes and Isomeric Molecules

Wang, Lijuan; Bai, Sha; Han, Ying‐Feng

doi:10.1021/jacs.2c07586

Cited by 59 publications

(28 citation statements)

References 82 publications

(33 reference statements)

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“…Initial studies in this field were done by Lehn and Sauvage on the synthesis of molecular helicates, knots, rotaxanes, and catenanes. Since then, this technique has been extensively used for obtaining different aesthetic and fascinating molecular architectures. − These 3D cages have been used for catalysis, , drug delivery, , purification of molecular mixtures via selective encapsulation, − and stabilizing reactive intermediates. , …”

Section: Introductionmentioning

confidence: 99%

Molecular Barrels as Potential Hosts: From Synthesis to Applications

2023

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Self-assembled discrete molecular architectures that show selective molecular recognition within their internal cavities are highly desirable. Such hosts often show guest recognition through several noncovalent interactions. This emulates the activity of naturally occurring enzymes and proteins. Research in the formation of 3D cages of different shapes and sizes has progressed rapidly since the development of coordination-driven self-assembly and dynamic covalent chemistry. Such molecular cages find applications in catalysis, stabilization of metastable molecules, purification of isomeric mixtures via selective encapsulation, and even in biomedical applications. Most of these applications stem from the ability of the host cages to bind guests strongly in a selective fashion, providing a suitable environment for the guests to perform their functions. Molecular cages having closed architectures with small windows either show poor encapsulation or inhibit easy guest release while those with wide open structures fail to form stable host–guest complexes. In this context, molecular barrels obtained by dynamic metal–ligand/covalent bond formation techniques possess optimized architectures. With a hollow-walled cavity and two large openings, molecular barrels satisfy the structural requirements for many applications. In this perspective, we will discuss in detail the synthetic strategies for obtaining barrels or barrel-like architectures employing dynamic coordination and covalent interactions, their structure-based classification, and their applications in catalysis, storing transient molecules, separation of chemicals, and photoinduced antibacterial activity. We aim to highlight the structural advantages of molecular barrels over other architectures for efficiently carrying out several functions and for the development of new applications.

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Section: Introductionmentioning

confidence: 99%

Molecular Barrels as Potential Hosts: From Synthesis to Applications

2023

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“…Over the past few decades, metal–organic cages (MOCs) have attracted increasing attention, owing to their intriguing structures and topologies as well as their potential applications. − MOCs is a class of discrete molecular architectures and are commonly formed by the self-assembly of metal ions or clusters linked through carboxylate organic ligands . Up to now, a large number of MOCs have been synthesized based on monometallic, bimetallic, trimetallic, and higher nuclearity clusters. ,, Regrettably, many artificial MOCs have a relatively simple topological structure and mainly focus on trigonal-prismatic, tetrahedral, and octahedral structures. − Also few synthetic topologies can match the structure of their biological counterparts. − Additionally, although some MOCs have been examined as supramolecular sensing, examples of those investigated for multifunctional cage-based sensors are still limited. − Thus, the exploration of MOCs with novel topology and superior performance is still a fascinating and challenging target in the field of supramolecular chemistry.…”

Section: Introductionmentioning

confidence: 99%

Trefoil-Shaped Metal–Organic Cages as Fluorescent Chemosensors for Multiple Detection of Fe³⁺, Cr₂O₇^2–, and Antibiotics

et al. 2023

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The construction of metal–organic cages (MOCs) with specific structures and fluorescence sensing properties is of much importance and challenging. Herein, a novel phenanthroline-based metal–organic cage, [Cd3L3·6MeOH·6H2O] (1), was synthesized by metal-directed assembly of the ligand 3,3′-[(1E,1′E)-(1,10-phenanthroline-2,9-diyl)bis(ethene-2,1-diyl)]dibenzoic acid (H2L) and CdI2 using a solvothermal method. According to single-crystal X-ray analysis, cage 1 exhibits a rare trefoil-shaped structure. Meanwhile, the discrete MOCs are further stacked into a 3D porous supramolecular structure through abundant intermolecular C–H···O interactions. Additionally, through exploration of fluorescence sensing on cations, anions, and antibiotics in aqueous solution, the experimental results indicate that cage 1 has excellent fluorescence sensing abilities for Fe3+, Cr2O7 2–, and nitrofuran and nitroimidazole antibiotics. The sensing ability of 1 remains unaltered for five cycles toward all analytes. The above results suggested that cage 1 can be considered a potential multiple sensor for the detection of Fe3+, Cr2O7 2–, and some antibiotics.

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“…[27][28][29][30][31][32][33][34][35][36] This is one of the reasons why many strategies have been developed to reach tridimensional polyhedral cavities of various geometries, nuclearities and sizes. [37][38][39][40] Tuning the cavity volume of the latter constitutes an important parameter when addressing binding selectivity issues, notably for application in the separation of gases, 41 small hydrocarbons, 42 PAHs 43,44 or fullerenes, [45][46][47][48][49][50][51] as well as for selective catalysis. [52][53][54][55][56][57] Such a control over the cavity volume can notably be attained by adjusting the size of the starting polypyridyl ligand.…”

Section: Introductionmentioning

confidence: 99%