Aluminum molecular rings bearing amino-polyalcohol for iodine capture

Zhang, Yi; Li, Qiaohong; Fang, Wei‐Hui; Zhang, Jian

doi:10.1039/d1qi01451j

Cited by 12 publications

(11 citation statements)

References 75 publications

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“…Previously, there have been a few cyclic metal oxide carboxylate clusters with six-metal and eight-metal rings such as M 6 O 6 (M = Al 3+ , Fe 3+ , Ti 4+ ) − and M 8 O 8 (M = Fe 3+ , Cr 3+ , Al 3+ , Ti 4+ ). − However, those with a seven-metal Ti 7 O 7 ring, such as the current Ti 7 Cr 14 host, are much less . Meanwhile, the hierarchical and concentric arrangement of Ti 7 O 7 and Cr 14 O 14 rings is unique.…”

Section: Resultsmentioning

confidence: 99%

Cr–Ti Mixed Oxide Molecular Cages: Synthesis, Structure, Photoresponse, and Photocatalytic Properties

et al. 2022

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The solvothermal reaction of titanium isopropoxide and chromate in the presence of benzoate produced two novel host−guest clusters encapsulating Cs + or H 3 O + , (H 3 O)@Ti 7 Cr 14 and Cs@Ti 7 Cr 14 . The most remarkable feature is that the Ti 7 O 7 ring is concentrically embraced by a Cr 14 O 14 ring to form a rigid Ti 7 Cr 14 host. ESI-MS and 133 Cs NMR revealed that the overall framework structures are preserved, whereas the benzoate ligands on the two clusters may be labile in solutions. Both (H 3 O)@ Ti 7 Cr 14 and Cs@Ti 7 Cr 14 exhibit good UV−vis light-responsive properties and photocatalytic activities, with absorption edges extending up to 780 nm. Cs@Ti 7 Cr 14 is an effective visible-lightresponsive photocatalyst in both the heterogeneous methylene dye degradation and homogeneous CO 2 cycloaddition reaction under mild conditions like room temperature and 1 bar of CO 2 . According to the mechanism studies, Cs + , as a rigid guest, can significantly improve the photogenerated charge separation efficiency of the Ti 7 Cr 14 host, thereby improving its interface charge separation properties, photocurrent, and photocatalytic activities. Our findings not only provide new members of heterometallic titanium oxide clusters to enrich the metal oxide cluster family but also open up new possibilities for their photoresponses, which may play an important role in solar energy harvesting for sustainable chemistry.

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Section: Resultsmentioning

confidence: 99%

Cr–Ti Mixed Oxide Molecular Cages: Synthesis, Structure, Photoresponse, and Photocatalytic Properties

et al. 2022

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“…2i). [38][39][40][41][42][43][44] In solvent systems containing conjugated ligands, phenols with stronger polarity can easily interact with them via π⋯π interaction, thereby distorting the Al 16 nucleus. This is also the reason why the amount of the linker phenol (20) is greater than that of n-propanol (16).…”

Section: Ring Curvature Discussionmentioning

confidence: 99%

Two solvent-dependent Al₁₆ nanorings: design, synthesis and nonlinear optical limiting behavior

Wang,

Qi,

Chen

et al. 2024

Inorg. Chem. Front.

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“…Since 2019, we have made considerable efforts to study the solvothermal synthesis of Al-oxo macrocycles and have achieved great advances in ring expansion and coordination regulation. 42,44,45 The as-synthesized Al-oxo macrocycles are with general formula Al n (OH) x (OR) y L (3n−x−y) (n = 6-20, OR = alcohols or phenols, L = carboxylic acids). 43 The abundant -OH sites in such macrocycle are conducive to furnishing abundant non-covalent interactions to guest molecules.…”

Section: The Synthesis Protocolsmentioning

confidence: 99%

Supracluster Rotaxanes with Adaptive Al8 Macrocycle for Tunable Optical Limiting

Fang,

Liu,

Zheng

et al. 2024

Preprint

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Mechanically interlocked molecules like rotaxane have attracted considerable attention in supramolecular chemistry and have been shown useful for the construction of molecular machines. Metal coordination chemistry plays an important role to expand the rotaxanes and immobilize the ring components to the axial molecules. Although many types of macrocycles have been extensively used to make rotaxanes, those based on metal-organic macrocycles are relatively undeveloped. Therefore, there is a large potential for exploring their supracluster assemblies for target properties. Different from the currently limited study on "axle-H···ring” noncovalent binding mode in host-guest inorganic-organic supramolecular chemistry, we herein developed an opposite supracluster assembly pattern naming "ring-H···axles". The key to the success of donor and acceptor role reversal is the use of a flexible Al8 macrocycle: its capsule-shaped cavity with sufficient hydrophobic aromatic inner wall and hydrophilic -OH sites provide an excellent environment to form and adapt to the axles. Such "ring-H···axles" noncovalent binding mode pattern altered the fixed binding mode of ring and axle in reported hybrid inorganic-organic rotaxanes and versatility of the axles involving molecules, metal complexes and infinite metal coordination “strings”. The capsule-shaped Al8 macrocycle acts as a confined reactor demonstrating the directional, stepwise, and controlled assembly process from molecules, metal complexes to metal coordination “strings”, resulting in the isolation from [2]-pseudorotaxane, [2]-rotaxane, to higher-ordered polyrotaxanes. Different from the traditional solution-phase method to make rotaxane, this work provides an atomically precise synthesis route for constructing supracluster rotaxane. Such controlled synthesis in the atomic-level confined cavity provides an excellent platform for property study. A rigid Al8 macrocycle can trap metal centers through electrostatic interaction, while flexible organic ligands can interact with aromatic guests through π···π stacking. Therefore, the heavy metal effect and conjugation effect can be introduced simultaneously to remarkably improve photo-related properties such as optical limiting and third-order nonlinear responses.

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Aluminum molecular rings bearing amino-polyalcohol for iodine capture

Abstract: The advantage of macrocyclic entities lies in their vital implications for host−guest chemistry. In this study, we demonstrated a noteworthy assembly of aluminum molecular rings for iodine capture. The one-pot...

Cited by 12 publications

References 75 publications

Cr–Ti Mixed Oxide Molecular Cages: Synthesis, Structure, Photoresponse, and Photocatalytic Properties

Cr–Ti Mixed Oxide Molecular Cages: Synthesis, Structure, Photoresponse, and Photocatalytic Properties

Two solvent-dependent Al₁₆ nanorings: design, synthesis and nonlinear optical limiting behavior

Supracluster Rotaxanes with Adaptive Al8 Macrocycle for Tunable Optical Limiting

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Aluminum molecular rings bearing amino-polyalcohol for iodine capture

Abstract: The advantage of macrocyclic entities lies in their vital implications for host−guest chemistry. In this study, we demonstrated a noteworthy assembly of aluminum molecular rings for iodine capture. The one-pot...

Cited by 12 publications

References 75 publications

Cr–Ti Mixed Oxide Molecular Cages: Synthesis, Structure, Photoresponse, and Photocatalytic Properties

Cr–Ti Mixed Oxide Molecular Cages: Synthesis, Structure, Photoresponse, and Photocatalytic Properties

Two solvent-dependent Al16 nanorings: design, synthesis and nonlinear optical limiting behavior

Supracluster Rotaxanes with Adaptive Al8 Macrocycle for Tunable Optical Limiting

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Product

Resources

About

Two solvent-dependent Al₁₆ nanorings: design, synthesis and nonlinear optical limiting behavior