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Research Archive

Tetrazine Box / Qinghui Guo

Publications – 1182

We have made a TetrazineBox, which serves as a toolbox for probing the radical properties and generating efficiently a range of structurally diverse cyclophanes by box-to-box cascade transformations, taking advantage of either reductions or an inverse electron-demand Diels-Alder reaction.

Single-Molecule Conductance of Charged Cyclophanes / Hongliang Chen

Publications – 1181

Intramolecular circuits are built with two-channel charged cyclophanes. An interchannel gating effect and constructive quantum interference act synergistically, leading to a conductance that is 50-fold higher than that of a single-channel control, breaking the single-molecule superposition law.

XCage / Wenqi (Vince) Liu

Publications – 1180

A new tricyclic octacationic cyclophane, XCage, which has a stereoelectronic complementarity towards perylene diimide and shows a picomolar binding affinity in water, has been designed and synthesized.

Redox-Active Macrocycles for Zinc Batteries / Kwan Woo Nam

Publications – 1179

A two-dimensional (2D) conductive metal-organic framework (MOF) with large one-dimensional channels has been developed as a zinc battery cathode. Owing to its unique structure, hydrated Zn2+ ions which are inserted directly into the host structure, Cu3(HHTP)2, allow high-rate performance.

CD-Containing Hybrid Frameworks / Dengke Shen

Publications – 1178

A class of γ-cyclodextrin-containing hybrid frameworks (CD-HFs) has been synthesized, employing γ-cyclodextrin (γ-CD) as the primary building blocks, along with 4-methoxysalicylate (4-MS) anions as the secondary building blocks.

Semi-Artificial Photosynthetic System / Penghao Li

In Collaboration with – Farha Group / Zhijie Chen

>Publications – 1177

A prototypical semi-artificial photosynthetic system for efficient carbon dioxide fixation was realized using a modified metal-organic framework NU-1006, which comprises a pre-installed Rh-based electron mediator and also encapsulates coenzyme NAD+/NADH.

Radical-Pairing Interactions in New Hosts / Kang Cai

Publications – 1176

The structure-property relationships between cavity sizes and binding affinities for radical-pairing interactions have been investigated using a series of bisradical dicationic cyclophanes (purple) with different linker units (Ar1 and Ar2 / light pink) to modulate their cavity sizes.

2D Tessellations by Charged Cyclophanes / Yassine Beldjoudi

Publications – 1175

Electron donor-acceptor cyclophanes are programmable building blocks which adopt different 2D tessellations using charge transfer (CT) interactions. The TTF–cyclophane 2D tessellations display dual intra- and intermolecular CT behavior, offering multi-responsive materials.

A molecular dual pump / Yunyan Qiu

Publications – 1172

A molecular dual pump, which consists of two individual pumps linked in a head-to-tail fashion, has been designed and synthesized for the controlled capture and release of a ring via a [2]rotaxane intermediate.

Conductive 2D MOFs for Zinc Batteries / Kwan Woo Nam

Publications – 1170

A redox-active triangular phenanthrenequinone-based macrocycle (PQ-Δ) with a rigid geometry has been developed as a zinc battery cathode. The macrocyclic nature of the PQ-Δ cathode provides a dramatically increased capacity and cyclability compared to that of traditional organic materials.

Cyclophane-Protected NDI Radical / Kang Cai

Publications – 1169

A new strategy has been presented which stabilizes the NDI•– radical anion and modulates its redox properties, by host-guest encapsulation and/or mechanical interlocking with a tetracationic cyclophane, namely, ExBox4+.

Artificial Allomelanin Nanoparticles / Yuanning Feng

In Collaboration with – Gianneschi Group / Xuhao Zhou

Publications – 1168

Artificial allomelanin nanoparticles (AMNPs), analogous to one type of melanin produced by radiation-resistant fungi, have been prepared with well-defined nanostructures. They can be taken up by human epidermal keratinocytes and act as radical scavengers.

A Supramolecular Diamond / Qinghui Guo

Publications – 1167

A unique approach has been established for constructing supramolecular diamond crystals with nanoporous diamondoid superstructures and octahedral shapes, resulting from the hierarchical self-assembly of preorganized hexa-charged molecules quantitatively within seconds under ambient conditions.

Supramolecular Polyknot / Penghao Li

Publications – 1166

A hydrogen-bonded three-dimensional porous supramolecular polyknot with unprecedented self-entangled topology is assembled from a rigid trigonal prismatic triptycene building block with six extended peripheral aryl-carboxyl groups.

Cyclotris(paraquat-p-phenylenes) / Qinghui Guo

Publications – 1165

Redox-active and shape-persistent cyclophanes, namely CTPQT6+ and MCTPQT6+, which are the homologous tricyclic derivatives of the trademark Blue Box from our group, have been synthesized. These derivatives adopt triangular conformations and the 3D packing of MCTPQT6+ results in nanometer-sized channels in the solid state.

Regulated Photodynamic Activity of a Photosensitizer / Indranil Roy

Publications – 1164

A multifunctional synthetic receptor ExBox4+ has been employed to achieve supramolecular photoprotection, lysosomal delivery, and pH-triggered release of a photosensitizer. The use of the ExBox4+ -bound photosensitizer in anticancer treatment using regulated photodynamic therapy is described.

Ligand-Directed Synthesis of Zr-MOFs / Penghao Li

In Collaboration with – Farha Group / Zhijie Chen

Publications – 1163

A series of zirconium-based metal-organic frameworks (Zr-MOFs), i.e. NU160X, with the edge-transitive alb net, was synthesized reticularly from 12-connected hexagonal Zr6 nodes and 6-connected trigonal-prismatic triptycene linkers. These Zr-MOFs exhibit remarkable activities toward the destruction of a nerve agent (Soman) and a nerve agent simulant.

In Situ Photoconversion of Multicolor Luminescence / Huang Wu

Publications – 1160

A photoluminescent supramolecular assembly, the fluorescence of which can be changed efficiently from yellow to blue in an in situ photo-controlled manner, has been prepared in two stages. Employing this assembly, white light emission can be realized expeditiously by a luminescence color-conversion process.

Highly Porous acs-MOFs for Water Sorption / Penghao Li

In Collaboration with – Farha Group / Zhijie Chen

Publications – 1158

A series of non-catenated metal-organic frameworks based on the acs net (acs-MOFs), i.e. NU-1500, was synthesized from trivalent trinuclear metal (Fe3+, Cr3+ and Sc3+) clusters and 6-connected trigonal-prismatic linkers. The highly porous and hydrolytically stable NU-1500-Cr can be activated directly from water and displays an impressive water vapor uptake with a trace of hysteresis.

Interpenetration Isomerism in HOFs / Penghao Li

Publications – 1157

A trigonal prismatic triptycene building block assembles into either a two‐fold interpenetrated acs network (acs‐2 c) or a five‐fold interpenetrated acs network (acs‐5 c) depending upon the crystallization conditions.

Controllable Molecular Encapsulation with Dynamic Host / Huang Wu

Publications – 1156

When a photo-switchable oligo(p-phenylenevinylene) bipyridinium unit (light pink) is incorporated into a tetracationic cyclophane (light blue), it confers upon the cyclophane the ability to direct reversible guest (red and pink) capture and release using thermal and photo stimuli.

Cyclophane for Live-Cell Imaging / Indranil Roy

Publications – 1141

A glowing tetracationic cyclophane (ExTzBox•4Cl) with unity quantum yield has been synthesized and utilized for live-cell imaging. This work, which describes the significance of using box-like cyclophanes for bioimaging, holds promise for the development of multimodal imaging platforms.