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1. A mesoporous NNN-pincer-based metal–organic framework scaffold for the preparation of noble-metal-free catalysts

Author:
Zhou, Hong-Cai,   et al.   ; Zhang, Yingmu; Li, Jialuo; Yang, Xinyu; Zhang, Peng; Pang, Jiandong; Li, Bao;     Show all 7 Authors
Source:
Chemical communications 2019 v.55 no.14 pp. 2023-2026
ISSN:
1364-548X
Subject:
aromatic hydrocarbons; catalysts; catalytic activity; chemical communication; coordination polymers; epoxidation reactions; porous media
Abstract:
... Through topology-guided synthesis, a Zr-based mesoporous MOF was successfully constructed, adopting a β-cristobalite-type structure. The MOF is embedded with well-arranged terpyridine coordination sites for facile post-synthetic metalation, and can be effectively used as a general scaffold for the preparation of noble-metal-free catalysts. For instance, the scaffolded metal@MOF material exhibits h ...
DOI:
10.1039/c8cc09491h

2. A Reversible Crystallinity-Preserving Phase Transition in Metal–Organic Frameworks: Discovery, Mechanistic Studies, and Potential Applications

Author:
Zhou, Hong-Cai,   et al.   ; Liu, Dahuan; Liu, Tian-Fu; Chen, Ying-Pin; Zou, Lanfang; Feng, Dawei; Wang, Kecheng; Zhang, Qiang; Yuan, Shuai; Zhong, Chongli;     Show all 10 Authors
Source:
Journal of the American Chemical Society 2015 v.137 no.24 pp. 7740-7746
ISSN:
1520-5126
Subject:
coordination polymers; crystal structure; encapsulation; metal ions; phase transition; photoluminescence
Abstract:
... A quenching-triggered reversible single-crystal-to-single-crystal (SC-SC) phase transition was discovered in a metal–organic framework (MOF) PCN-526. During the phase transition, the one-dimensional channel of PCN-526 distorts from square to rectangular in shape while maintaining single crystallinity. Although SC-SC transformations have been frequently observed in MOFs, most reports have focused o ...
DOI:
10.1021/jacs.5b02999

3. Construction of Ultrastable Porphyrin Zr Metal–Organic Frameworks through Linker Elimination

Author:
Zhou, Hong-Cai,   et al.   ; Feng, Dawei; Chung, Wan-Chun; Wei, Zhangwen; Gu, Zhi-Yuan; Jiang, Hai-Long; Chen, Ying-Pin; Darensbourg, Donald J.;     Show all 8 Authors
Source:
Journal of the American Chemical Society 2013 v.135 no.45 pp. 17105-17110
ISSN:
1520-5126
Subject:
aqueous solutions; catalysts; catalytic activity; cobalt; coordination polymers; iron; nickel; pH; porphyrins; surface area; zirconium
Abstract:
... A series of highly stable MOFs with 3-D nanochannels, namely PCN-224 (no metal, Ni, Co, Fe), have been assembled with six-connected Zr₆ cluster and metalloporphyrins by a linker-elimination strategy. The PCN-224 series not only exhibits the highest BET surface area (2600m²/g) among all the reported porphyrinic MOFs but also remains intact in pH = 0 to pH = 11 aqueous solution. Remarkably, PCN-224( ...
DOI:
10.1021/ja408084j

4. Controlled Intercalation and Chemical Exfoliation of Layered Metal–Organic Frameworks Using a Chemically Labile Intercalating Agent

Author:
Zhou, Hong-Cai,   et al.   ; Ding, Yanjun; Chen, Ying-Pin; Zhang, Xinlei; Chen, Liang; Dong, Zhaohui; Jiang, Hai-Long; Xu, Hangxun;     Show all 8 Authors
Source:
Journal of the American Chemical Society 2017 v.139 no.27 pp. 9136-9139
ISSN:
1520-5126
Subject:
ambient temperature; coordination polymers; crystals; disulfide bonds; nanosheets; photocatalysis
Abstract:
... Creating ordered two-dimensional (2D) metal–organic framework (MOF) nanosheets has attracted extensive interest. However, it still remains a great challenge to synthesize ultrathin 2D MOF nanosheets with controlled thickness in high yields. In this work, we demonstrate a novel intercalation and chemical exfoliation approach to obtain MOF nanosheets from intrinsically layered MOF crystals. This app ...
DOI:
10.1021/jacs.7b04829

5. Control the Structure of Zr-Tetracarboxylate Frameworks through Steric Tuning

Author:
Zhou, Hong-Cai,   et al.   ; Pang, Jiandong; Yuan, Shuai; Qin, Junsheng; Liu, Caiping; Lollar, Christina; Wu, Mingyan; Yuan, Daqiang; Hong, Maochun;     Show all 9 Authors
Source:
Journal of the American Chemical Society 2017 v.139 no.46 pp. 16939-16945
ISSN:
1520-5126
Subject:
coordination polymers; influenza; ligands; molecular dynamics; prediction; topology
Abstract:
... Ligands with flexible conformations add to the structural diversity of metal–organic frameworks but, at the same time, pose a challenge to structural design and prediction. Representative examples include Zr-tetracarboxylate-based MOFs, which afford assorted structures for a wide range of applications, but also complicate the structural control. Herein, we systematically studied the formation mech ...
DOI:
10.1021/jacs.7b09973

6. Cooperative Template-Directed Assembly of Mesoporous Metal–Organic Frameworks

Author:
Zhou, Hong-Cai,   et al.   ; Sun, Lin-Bing; Li, Jian-Rong; Park, Jinhee;     Show all 4 Authors
Source:
Journal of the American Chemical Society 2012 v.134 no.1 pp. 126-129
ISSN:
1520-5126
Subject:
cetyltrimethylammonium bromide; chelating agents; citric acid; coordination polymers; micelles; microspores; porous media; surfactants
Abstract:
... Despite great efforts, the development of a reliable way to assemble mesoporous metal–organic frameworks (mesoMOFs) remains a challenge. In this work, we have designed a cooperative template system, comprising a surfactant (cetyltrimethylammonium bromide) and a chelating agent (citric acid), for the generation of a mesoMOF containing a hierarchical system of mesopores interconnected with microspor ...
DOI:
10.1021/ja209698f

7. Creating Hierarchical Pores by Controlled Linker Thermolysis in Multivariate Metal–Organic Frameworks

Author:
Zhou, Hong-Cai,   et al.   ; Feng, Liang; Yuan, Shuai; Zhang, Liang-Liang; Tan, Kui; Li, Jia-Luo; Kirchon, Angelo; Liu, Ling-Mei; Zhang, Peng; Han, Yu; Chabal, Yves J.;     Show all 11 Authors
Source:
Journal of the American Chemical Society 2018 v.140 no.6 pp. 2363-2372
ISSN:
1520-5126
Subject:
catalytic activity; coordination polymers; crystal structure; decarboxylation; drugs; immobilized enzymes; nanoparticles; porosity; porous media; thermal degradation
Abstract:
... Sufficient pore size, appropriate stability, and hierarchical porosity are three prerequisites for open frameworks designed for drug delivery, enzyme immobilization, and catalysis involving large molecules. Herein, we report a powerful and general strategy, linker thermolysis, to construct ultrastable hierarchically porous metal–organic frameworks (HP-MOFs) with tunable pore size distribution. Lin ...
DOI:
10.1021/jacs.7b12916

8. Creating Well-Defined Hexabenzocoronene in Zirconium Metal–Organic Framework by Postsynthetic Annulation

Author:
Zhou, Hong-Cai,   et al.   ; Qin, Jun-Sheng; Yuan, Shuai; Zhang, Lei; Li, Bao; Du, Dong-Ying; Huang, Ning; Guan, Wei; Drake, Hannah F.; Pang, Jiandong; Lan, Ya-Qian; Alsalme, Ali;     Show all 12 Authors
Source:
Journal of the American Chemical Society 2019 v.141 no.5 pp. 2054-2060
ISSN:
1520-5126
Subject:
X-ray diffraction; active sites; carbon dioxide; coordination polymers; electrochemistry; irradiation; ligands; moieties; photocatalysis; photosensitizing agents; solubility; zirconium
Abstract:
... The incorporation of large π-conjugated ligands into metal–organic frameworks (MOFs) can introduce intriguing photophysical and electrochemical properties into the framework. However, these effects are often hindered by the strong π–π interaction and the low solubility of the arylated ligands. Herein, we report the synthesis of a porous zirconium-based MOF, Zr₆(μ₃-O)₄(μ₃-OH)₄(OH)₆(H₂O)₆(HCHC) (PCN ...
DOI:
10.1021/jacs.8b11042

9. Derivation and Decoration of Nets with Trigonal-Prismatic Nodes: A Unique Route to Reticular Synthesis of Metal–Organic Frameworks

Author:
Zhou, Hong-Cai,   et al.   ; Qin, Jun-Sheng; Du, Dong-Ying; Li, Mian; Lian, Xi-Zhen; Dong, Long-Zhang; Bosch, Mathieu; Su, Zhong-Min; Zhang, Qiang; Li, Shun-Li; Lan, Ya-Qian; Yuan, Shuai;     Show all 12 Authors
Source:
Journal of the American Chemical Society 2016 v.138 no.16 pp. 5299-5307
ISSN:
1520-5126
Subject:
biomimetics; catalysts; catalytic activity; coordination polymers; prediction; topology
Abstract:
... Quests for advanced functionalities in metal–organic frameworks (MOFs) inevitably encounter increasing complexity in their tailored framework architectures, accompanied by heightened challenges with their geometric design. In this paper, we demonstrate the feasibility of rationally exploiting topological prediction as a blueprint for predesigned MOFs. A new triangular frusta secondary building uni ...
DOI:
10.1021/jacs.6b01093

10. Direct Measurement of Adsorbed Gas Redistribution in Metal–Organic Frameworks

Author:
Zhou, Hong-Cai,   et al.   ; Chen, Ying-Pin; Liu, Yangyang; Liu, Dahuan; Bosch, Mathieu;     Show all 5 Authors
Source:
Journal of the American Chemical Society 2015 v.137 no.8 pp. 2919-2930
ISSN:
1520-5126
Subject:
X-ray diffraction; adsorbents; adsorption; binding sites; coordination polymers; desorption; temperature
Abstract:
... Knowledge about the interactions between gas molecules and adsorption sites is essential to customize metal-organic frameworks (MOFs) as adsorbents. The dynamic interactions occurring during adsorption/desorption working cycles with several states are especially complicated. Even so, the gas dynamics based upon experimental observations and the distribution of guest molecules under various conditi ...
DOI:
10.1021/ja5103579

11. 3D Long-Range Triplet Migration in a Water-Stable Metal–Organic Framework for Upconversion-Based Ultralow-Power in Vivo Imaging

Author:
Zhou, Hong-Cai,   et al.   ; Park, Jihye; Xu, Ming; Li, Fuyou;     Show all 4 Authors
Source:
Journal of the American Chemical Society 2018 v.140 no.16 pp. 5493-5499
ISSN:
1520-5126
Subject:
coordination polymers; harvesting; image analysis; lymph nodes; mice; photons; solar cells
Abstract:
... Triplet–triplet annihilation upconversion (TTA-UC) has gained increasing attention because it allows for harvesting of low-energy photons in the solar spectrum with high efficiency in relevant applications including solar cells and bioimaging. However, the utilization of conventional TTA-UC systems for low-power bioapplications is significantly hampered by their general incompatibility and low eff ...
DOI:
10.1021/jacs.8b01613

12. Effect of Imidazole Arrangements on Proton-Conductivity in Metal–Organic Frameworks

Author:
Zhou, Hong-Cai,   et al.   ; Zhang, Feng-Ming; Dong, Long-Zhang; Qin, Jun-Sheng; Guan, Wei; Liu, Jiang; Li, Shun-Li; Lu, Meng; Lan, Ya-Qian; Su, Zhong-Min;     Show all 10 Authors
Source:
Journal of the American Chemical Society 2017 v.139 no.17 pp. 6183-6189
ISSN:
1520-5126
Subject:
coordination polymers; encapsulation; imidazoles; ligands; methodology; models; protons
Abstract:
... Imidazole molecules were frequently incorporated into porous materials to improve their proton conductivity. To investigate how different arrangements of imidazoles in metal–organic frameworks (MOFs) affect the overall proton conduction, we designed and prepared a MOF-based model system. It includes an Fe–MOF as the blank, an imidazole@Fe–MOF (Im@Fe–MOF) with physically adsorbed imidazole, and an ...
DOI:
10.1021/jacs.7b01559

13. Enhancing Pore-Environment Complexity Using a Trapezoidal Linker: Toward Stepwise Assembly of Multivariate Quinary Metal–Organic Frameworks

Author:
Zhou, Hong-Cai,   et al.   ; Pang, Jiandong; Yuan, Shuai; Qin, Junsheng; Wu, Mingyan; Lollar, Christina T.; Li, Jialuo; Huang, Ning; Li, Bao; Zhang, Peng;     Show all 10 Authors
Source:
Journal of the American Chemical Society 2018 v.140 no.39 pp. 12328-12332
ISSN:
1520-5126
Subject:
coordination polymers; moieties; zirconium
Abstract:
... Multicomponent metal–organic frameworks (MOFs) promise the precise placement of synergistic functional groups with atomic-level precision, capable of promoting fascinating developments in basic sciences and applications. However, the complexity of multicomponent systems poses a challenge to their structural design and synthesis. Herein, we show that linkers of low symmetry can bring new opportunit ...
DOI:
10.1021/jacs.8b07411

14. Enzyme–MOF (metal–organic framework) composites

Author:
Zhou, Hong-Cai,   et al.   ; Lian, Xizhen; Fang, Yu; Joseph, Elizabeth; Wang, Qi; Li, Jialuo; Banerjee, Sayan; Lollar, Christina; Wang, Xuan;     Show all 9 Authors
Source:
Chemical Society reviews 2017 v.46 no.11 pp. 3386-3401
ISSN:
1460-4744
Subject:
catalytic activity; coordination polymers; enzyme activity; immobilized enzymes; synergism
Abstract:
... The ex vivo application of enzymes in various processes, especially via enzyme immobilization techniques, has been extensively studied in recent years in order to enhance the recyclability of enzymes, to minimize enzyme contamination in the product, and to explore novel horizons for enzymes in biomedical applications. Possessing remarkable amenability in structural design of the frameworks as well ...
DOI:
10.1039/c7cs00058h

15. Exposed Equatorial Positions of Metal Centers via Sequential Ligand Elimination and Installation in MOFs

Author:
Zhou, Hong-Cai,   et al.   ; Yuan, Shuai; Zhang, Peng; Zhang, Liangliang; Garcia-Esparza, Angel T.; Sokaras, Dimosthenis; Qin, Jun-Sheng; Feng, Liang; Day, Gregory S.; Chen, Wenmiao; Drake, Hannah F.; Elumalai, Palani; Madrahimov, Sherzod T.; Sun, Daofeng;     Show all 14 Authors
Source:
Journal of the American Chemical Society 2018 v.140 no.34 pp. 10814-10819
ISSN:
1520-5126
Subject:
catalysts; catalytic activity; cobalt; coordination polymers; copper; dimerization; ethylene; iron; ligands; manganese; metal ions; moieties; nickel; palladium
Abstract:
... Metal–organic frameworks (MOFs) provide highly designable platforms to construct complex coordination architectures for targeted applications. Herein, we demonstrate that trans-coordinated metal centers with exposed equatorial positions can be placed in a MOF matrix. A Zr-based MOF, namely, PCN-160, was initially synthesized as a scaffold structure. Postsynthetic linker labilization was subsequent ...
DOI:
10.1021/jacs.8b04886

16. Facile Fabrication of a Multifunctional Metal–Organic Framework-based Sensor Exhibiting Exclusive Solvochromic Behaviors toward Ketone Molecules

Author:
Zhou, Hong-Cai,   et al.   ; Li, Bao; Chen, Xi; Hu, Peng; Kirchon, Angelo; Zhao, Yu-Meng; Pang, Jiandong; Zhang, Tianle;     Show all 8 Authors
Source:
ACS applied materials & interfaces 2019 v.11 no.8 pp. 8227-8233
ISSN:
1944-8252
Subject:
acetone; acetophenones; adsorption; coordination polymers; enantiomers; hydrogen bonding; ligands; raw materials
Abstract:
... To probe the efficient strategy for preparing a multifunctional sensing material, the facile synthesis strategies and successful examples are urgently required. Through the utilization of a hexadentate ligand derived from cyclotriphosphazene, which displays spiral configurations and multiple connection modes, a novel metal–organic framework (MOF) was constructed via one-step synthesis from low-cos ...
DOI:
10.1021/acsami.8b19815

17. Flexible Zirconium MOF as the Crystalline Sponge for Coordinative Alignment of Dicarboxylates

Author:
Zhou, Hong-Cai,   et al.   ; Qin, Jun-Sheng; Yuan, Shuai; Alsalme, Ali;     Show all 4 Authors
Source:
ACS applied materials & interfaces 2017 v.9 no.39 pp. 33408-33412
ISSN:
1944-8252
Subject:
chemistry; coordination polymers; encapsulation; ligands; porosity; zirconium
Abstract:
... Because of their permanent porosity and unparalleled structural diversities, flexible metal–organic frameworks (MOFs) are promising and highly desirable in host–guest chemistry. In this work, we employed a flexible Zr-MOF system, namely PCN-700 species, as the crystalline sponge for guest inclusion. A family of linear dicarboxylate ligands was adsorbed in the void space of PCN-700, which were subs ...
DOI:
10.1021/acsami.6b16264

18. From fundamentals to applications: a toolbox for robust and multifunctional MOF materials

Author:
Zhou, Hong-Cai,   et al.   ; KirchonThese authors contributed equally to this work., Angelo; Feng, Liang; Drake, Hannah F.; Joseph, Elizabeth A.;     Show all 5 Authors
Source:
Chemical Society reviews 2018 v.47 no.23 pp. 8611-8638
ISSN:
1460-4744
Subject:
catalytic activity; coordination polymers; geometry; ligands; medicine
Abstract:
... In recent years, metal–organic frameworks (MOFs) have been regarded as one of the most important classes of materials. The combination of various metal clusters and ligands, arranged in a vast array of geometries has led to an ever-expanding MOF family. Each year, new and novel MOF structures are discovered. The structural diversity present in MOFs has significantly expanded the application of the ...
DOI:
10.1039/c8cs00688a

19. Harnessing solvent effects to integrate alkylamine into metal–organic frameworks for exceptionally high CO₂ uptake

Author:
Zhou, Hong-Cai,   et al.   ; Li, Hao; Wang, Kecheng; Hu, Zhigang; Chen, Ying-Pin; Verdegaal, Wolfgang; Zhao, Dan;     Show all 7 Authors
Source:
Journal of materials chemistry A 2019 v.7 no.13 pp. 7867-7874
ISSN:
2050-7496
Subject:
adsorbents; air; carbon dioxide; climate; coordination polymers; cyclohexanes; fossil fuels; greenhouse gas emissions; nitrogen; porosity; solvents; sorption
Abstract:
... Humanity's heavy dependence on fossil fuels results in the release of large amounts of carbon dioxide (CO₂) into the air. To avoid an irreversible disturbance in the atmosphere and global climate, considerable research efforts have been devoted to reducing CO₂ emissions. Employing metal–organic frameworks (MOFs) as solid adsorbents for CO₂ is deemed as a promising means to alleviate the problem. A ...
DOI:
10.1039/c8ta11300a

20. Hierarchical nickel/phosphorus/nitrogen/carbon composites templated by one metal–organic framework as highly efficient supercapacitor electrode materials

Author:
Zhou, Hong-Cai,   et al.   ; Yu, Fan; Xiong, Xin; Zhou, Liu-Yin; Li, Jia-Luo; Liang, Ji-Yuan; Hu, Si-QIan; Lu, Wang-Ting; Li, Bao;     Show all 9 Authors
Source:
Journal of materials chemistry A 2019 v.7 no.6 pp. 2875-2883
ISSN:
2050-7496
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; annealing; capacitance; carbon; coordination polymers; electrochemistry; electrodes; energy; nickel; nitrogen; oxygen; phosphorus; porous media; pyrolysis; scanning electron microscopy; surface area; synergism; temperature
Abstract:
... Utilization of a proper metal–organic framework (MOF) template has recently attracted significant attention for the fabrication of high-performance supercapacitor electrodes; however, limited attention has been paid to the process of preparation of an excellent MOF template used to derive the anticipated electrode materials. Herein, a two-fold interpenetrating MOF with a microporous structure and ...
DOI:
10.1039/c8ta11568k