Hui Li

Jilin University | JUT · Department of Chemistry

Piezochromic materials with pressure-dependent photoluminescence-tuning properties are important in many fields, such as mechanical sensors, security papers, and storage devices. Covalent organic frameworks (COFs), as an emerging class of crystalline porous materials (CPMs), feature structural dynamics and tunable photophysical properties, which ar...

Benefiting from their unique structural merits, three-dimensional (3D) large-pore COF materials demonstrate high surface areas and interconnected large channels, which makes these materials promising in practical applications. Unfortunately, functionalization strategies and application research are still absent in these structures. To this end, a s...

Heteroatom-doped carbon-based nanomaterials are one of the most promising metal-free electrocatalysts due to their high activity, low cost, long lifetime, and environmental friendliness. However, the precise atomic position is hard to tune; moreover, the specific role of those heteroatom species is still unclear. Herein, we report a series of metal...

Covalent organic frameworks (COFs) have attracted extensive interest due to their unique structures and various applications. However, structural diversities are still limited, which greatly restricts the development of COF materials. Herein, we report two unusual cubic (8-connected) building units and their derived 3D imine-linked COFs with bcu ne...

Comprehensive Summary Three‐dimensional (3D) covalent organic frameworks (COFs) are crystalline porous polymers with potential in numerous high‐tech applications, but the linkages involved in their synthesis are still rather limited. Herein, we report novel 3D sp ² carbon‐linked COFs fabricated by the formation reaction of C=C bonds and their appli...

Exploring novel materials deriving from earth resources to substitute for platinum(Pt) electrocatalyst to promote oxygen reduction reaction(ORR) of fuel cell cathode is very important. Herein, we have exploited two crystallographic thiophene-sulfur covalent organic frameworks(COFs), termed JUC-607 and JUC-608, as electrocatalysts that exhibited goo...

Owing to the finite building blocks and difficulty in structural identification, it remains a tremendous challenge to elaborately design and synthesize three‐dimensional covalent organic frameworks (3D COFs) with predetermined topologies. Herein, we report the first two cases of 3D COFs with the non‐interpenetrated hea net, termed JUC‐596 and JUC‐5...

Owing to the confined building blocks and difficulty in structural identification, it remains a tremendous challenge to directionally design and synthesize three‐dimensional covalent organic frameworks (3D COFs) with predetermined topologies. Herein, we report the first two cases of 3D COFs with the non‐interpenetrated hea net, termed JUC‐596 and J...

The property expansion of 3D functionalized covalent organic frameworks (COFs) is important for developing their potential applications. Herein, the first case of 3D hydrazone‐decorated COFs as pH‐triggered molecular switches is reported, and their application in the stimuli‐responsive drug delivery system is explored. These functionalized COFs wit...

Three-dimensional covalent organic frameworks (COFs) decorated with nitroxyl radicals are successfully prepared and employed as mild, efficient, and recyclable catalysts for selective oxidation of alcohols to aldehydes or ketones. Abstract With excellent designability, large accessible inner surface, and high chemical stability, covalent organic f...

With excellent designability, large accessible inner surface, and high chemical stability, covalent organic frameworks (COFs) are promising candidates as metal‐free heterogeneous catalysts. Here, we report two 3D radical‐based COFs (JUC‐565 and JUC‐566) in which radical moieties (TEMPO) are uniformly decorated on the channel walls via a bottom‐up a...

To safeguard the development of nuclear energy, practical techniques for capture and storage of radioiodine are of critical importance but remain a significant challenge. Here we report the synergistic effect of physical and chemical adsorption of iodine in tetrathiafulvalene-based covalent organic frameworks (COFs), which can markedly improve both...

a>Three-dimensional (3D) covalent organic frameworks (COFs) are crystalline porous polymers with potential in numerous high-tech applications, but the linkages involved in their synthesis are still rather limited. Herein we report the first case of 3D sp² carbon-linked COFs fabricated by the formation reaction of C=C bonds and their appl...

Developing functionalized 3D covalent organic frameworks (3D COFs) is critical to broaden their potential applications. However, the introduction of specific functionality in 3D COFs remains a great challenge because most of the functional groups are not compatible with the synthesis conditions. Herein, for the first time 3D thioether‐based COFs (J...

The growth of three-dimensional covalent organic frameworks (3D COFs) with new topologies is still considered as a great challenge due to limited availability of high-connectivity building units. Here we report the design and synthesis of 3D triptycene-based COFs, termed JUC-568 and JUC-569, following the deliberate symmetry-guided design principle...

a>The growth of three-dimensional covalent organic frameworks (3D COFs) with new topologies is still considered as a great challenge due to limited availability of high-connectivity building units. Here we report the design and synthesis of novel 3D triptycene-based COFs, termed JUC-568 and JUC-569, following the deliberate symmetry-guided design p...

p> The development of highly-sensitive recognition of hazardous chemicals, such as volatile organic compounds (VOCs) and polycyclic aromatic hydrocarbons (PAHs), is of significant importance because of their widespread social concerns related to environment and human health. Here, we report a three-dimensional (3D) covalent organic framework (COF,...

p>To safeguard the development of nuclear energy, practical techniques for capture and storage of radioiodine are of critical importance but remains a significant challenge. Here we report the synergistic effect of physical and chemical adsorption of iodine in tetrathiafulvalene-based covalent organic frameworks (COFs), which can markedly improve b...

Three-dimensional (3D) covalent organic frameworks (COFs) are excellent crystalline porous polymers for numerous potential appli-cations, but their building units and topological nets have been lim-ited. Herein we report the design and synthesis of the first 3D large-pore COF with stp topology constructed from a 6-connected triptycene-based monomer...

Three-dimensional (3D) covalent organic frameworks (COFs) are excellent porous crystalline polymers for numerous applications, but their building units and topological nets have been limited. Herein we report the first 3D large-pore COF with stp topology constructed with a 6-connected triptycene-based monomer. The new COF (termed JUC-564) has high...

Covalent organic frameworks (COFs) are an emerging class of crystalline porous polymers with pre-designed structures and tailored compositions. The adjustable porosities, high thermal and chemical stabilities, tunable functionalities and flexibility in installing catalytic active sites translate COFs into highly promising catalytic materials. In th...

The development of three‐dimensional (3D) covalent organic frameworks (COFs) with high chemical stability is of critical importance for their practical use. In this work, it is demonstrated that the stability of 3D COFs can be improved by periodic decoration of isopropyl groups on their backbones. Owing to the strong hydrophobicity of the alkyl gro...

Robust COFs for separation: A general strategy for developing 3D chemically stable covalent organic frameworks through hydrophobic engineering is presented. The application of 3D COF materials for oil/water separation over a wide pH range is explored. Abstract The development of three‐dimensional (3D) covalent organic frameworks (COFs) with high c...

Defective or heteroatoms-doped metal-free carbon materials (MFCMs) are regarded as efficient oxygen reduction reaction (ORR) catalysts in the past decade. However, the active site structures for ORR in MFCMs are hard to be precisely confirmed and controllably synthesized through the common methods such as high temperature pyrolysis or heteroatom do...

The electrochemical double‐layer capacitors (EDLCs) are highly demanded electrical energy storage devices due to their high power density with thousands of cycle life compared with pseudocapacitors and batteries. Herein, a series of capacitor cells composed of exfoliated mesoporous 2D covalent organic frameworks (e‐COFs) that are able to perform ex...

The development of three-dimensional (3D) covalent organic frameworks (COFs) with large pores and high surface areas is of great importance for various applications. However, it remains a major challenge due to the frequent structural interpenetration and pore collapse after the removal of guest species situated in the pores. Herein, we report for...

The development of covalent organic frameworks (COFs) with new building units is of critical importance for enriching the structural diversity and expanding their functions. However, the construction of COFs has been thus far limited primarily to traditional organic linkers. Herein, we report three-dimensional porous crystalline covalent polyoxomet...

The development of a mild, low cost and green synthetic route for covalent organic frameworks (COFs) is highly desirable in order to open the road for practical uses of this new family of crystalline porous solids. Herein, we report a general and facile strategy to prepare a series of microporous or mesoporous COFs by the β-ketoenamines based Micha...

Covalent organic frameworks (COFs) have been at the forefront of porous material research in recent years. With predictable structural compositions and controllable functionalities, structures and properties of COFs could be controlled to achieve targeted materials. On the other hand, the predesigned structure of COFs allows for fruitful postsynthe...

The functionalization of three-dimensional (3D) covalent organic frameworks (COFs) is essential to broaden their applications. However, the introduction of organic groups with electroactive abilities into 3D COFs is still very limited. Herein we report the first case of 3D tetrathiafulvalene-based COFs (3D-TTF-COFs) with non- or 2-fold interpenetra...

The development of crystalline porous materials with high chemical stability is of paramount importance for their practical application. Here, we report the synthesis of polyarylether-based covalent organic frameworks (PAE-COFs) with high crystallinity, porosity and chemical stability, including towards water, owing to the inert nature of their pol...

Covalent organic frameworks (COFs) are crystalline porous solids with broad potential applications. So far, the successful construction of COFs was limited to a few condensation reactions, and nearly all COFs were obtained by single-step synthesis based on predesigned linkers. Here, we report a general strategy in view of a one-pot cascade reaction...

The development of three-dimensional (3D) functionalized covalent organic frameworks (COFs) is of critical importance for expanding their potential applications. However, the introduction of functional groups in 3D COFs remains largely unexplored. Herein we report the first example of 3D Salphen-based COFs (3D-Salphen-COFs) and their metal-containi...

A simple and versatile strategy, borrowing ideas from the chemistry of MOFs and COFs, is developed for the synthesis of coordination-supported organic polymers (COPs) via coordination between Al3+ and 5-amino-8-hydroxyquinoline...

Covalent Organic Frameworks In their Communication on page 6042 ff., Q. Fang, V. Valtchev et al. describe the generation of three‐dimensional (3D) carboxy‐functionalized covalent organic frameworks (COFs) through postsynthetic modification of hydroxy‐functionalized COFs.

Kovalente organische Gerüste In der Zuschrift auf S. 6150 ff. erläutern Q. Fang, V. Valtchev et al. die Herstellung dreidimensionaler Carboxy‐funktionalisierter kovalenter organischer Gerüste (COFs) durch die Modifikation von Hydroxy‐funktionalisierten COFs.

Chemical Functionalization of covalent organic frameworks (COFs) is critical to tune their properties and broaden their potential applications. However, the introduction of functional groups especially in three-dimensional (3D) COFs still remains largely unexplored. Here we report a general strategy for generating a 3D carboxyl-functionalized COF t...

Chemical Functionalization of covalent organic frameworks (COFs) is critical to tune their properties and broaden their potential applications. However, the introduction of functional groups especially in three-dimensional (3D) COFs still remains largely unexplored. Here we report a general strategy for generating a 3D carboxyl-functionalized COF t...

Covalent organic frameworks (COFs) are an emerging class of porous crystalline polymers with broad potential applications. So far, the availability of 3D COFs is limited and more importantly only one type of covalent bond has been successful used for 3D COF materials. Here, we report a new synthetic strategy based on dual linkages that leads to 3D...