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Elmehrath S, Ahsan K, Munawar N, Alzamly A, Nguyen HL, Greish Y. Antibacterial efficacy of copper-based metal-organic frameworks against Escherichia coli and Lactobacillus. RSC Adv 2024; 14:15821-15831. [PMID: 38752161 PMCID: PMC11095089 DOI: 10.1039/d4ra01241k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Accepted: 05/08/2024] [Indexed: 05/18/2024] Open
Abstract
The widespread and excessive use of antimicrobial drugs has resulted in a concerning rise in bacterial resistance, leading to a risk of untreatable infections. The aim of this study was to formulate a robust and efficient antibacterial treatment to address this challenge. Previous work focused on the effectiveness of the Cu-BTC metal-organic framework (MOF; BTC stands for 1,3,5-benzenetricarboxylate) in combatting various bacterial strains. Herein, we compare the antibacterial properties of Cu-BTC with our newly designed Cu-GA MOF, consisting of copper ions bridged by deprotonated gallate ligands (H2gal2-), against Escherichia coli (E. coli) and Lactobacillus bacteria. Cu-GA was synthesized hydrothermally from copper salt and naturally derived gallic acid (H4gal) and characterized for antibacterial evaluation. The gradual breakdown of Cu(H2gal) resulted in a significant antibacterial effect that is due to the release of copper ions and gallate ligands from the framework. Both copper MOFs were nontoxic to bacteria at low concentrations and growth was completely inhibited at high concentrations when treated with Cu-BTC (1500 μg for E. coli and 1700 μg for Lactobacillus) and Cu-GA (2000 μg for both bacterial strains). Furthermore, our agarose gel electrophoresis results indicate that both MOFs could disrupt bacterial cell membranes, hindering the synthesis of DNA. These findings confirm the antibacterial properties of Cu-BTC and the successful internalization of Cu2+ ions and gallic acid by bacteria from the Cu-GA MOF framework, suggesting the potential for a sustained and effective therapeutic approach against pathogenic microorganisms.
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Affiliation(s)
- Sandy Elmehrath
- Department of Chemistry, United Arab Emirates University Al-Ain 15551 UAE
- Wyss Institute at Harvard University Boston MA 02215 USA
| | - Khansa Ahsan
- Department of Chemistry, United Arab Emirates University Al-Ain 15551 UAE
| | - Nayla Munawar
- Department of Chemistry, United Arab Emirates University Al-Ain 15551 UAE
| | - Ahmed Alzamly
- Department of Chemistry, United Arab Emirates University Al-Ain 15551 UAE
| | - Ha L Nguyen
- Department of Chemistry, University of California Berkeley Berkeley CA 94720 USA
| | - Yaser Greish
- Department of Chemistry, United Arab Emirates University Al-Ain 15551 UAE
- Zayed Centre for Health Sciences, United Arab Emirates University Al-Ain 15551 UAE
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2
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Alawadhi AH, Chheda S, Stroscio GD, Rong Z, Kurandina D, Nguyen HL, Rampal N, Zheng Z, Gagliardi L, Yaghi OM. Harvesting Water from Air with High-Capacity, Stable Furan-Based Metal-Organic Frameworks. J Am Chem Soc 2024; 146:2160-2166. [PMID: 38211338 DOI: 10.1021/jacs.3c11947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
We synthesized two isoreticular furan-based metal-organic frameworks (MOFs), MOF-LA2-1(furan) and MOF-LA2-2(furan) with rod-like secondary building units (SBUs) featuring 1D channels, as sorbents for atmospheric water harvesting (LA = long arm). These aluminum-based MOFs demonstrated a combination of high water uptake and stability, exhibiting working capacities of 0.41 and 0.48 gwater/gMOF (under isobaric conditions of 1.70 kPa), respectively. Remarkably, both MOFs showed a negligible loss in water uptake after 165 adsorption-desorption cycles. These working capacities rival that of MOF-LA2-1(pyrazole), which has a working capacity of 0.55 gwater/gMOF. The current MOFs stand out for their high water stability, as evidenced by 165 cycles of water uptake and release. MOF-LA2-2(furan) is the first aluminum MOF to employ a double 'long arm' extension strategy, which is confirmed through single-crystal X-ray diffraction (SCXRD). The MOFs were synthesized by using a straightforward synthesis route. This study offers valuable insights into the design of durable, water-stable MOFs and underscores their potential for efficient water harvesting.
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Affiliation(s)
- Ali H Alawadhi
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
- Bakar Institute of Digital Materials for the Planet, College of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States
| | - Saumil Chheda
- Department of Chemical Engineering and Materials Science, Department of Chemistry and Chemical Theory Center, University of Minnesota-Twin Cities, Minneapolis, Minnesota 55455, United States
| | - Gautam D Stroscio
- Department of Chemistry, Pritzker School of Molecular Engineering, and Chicago Center for Theoretical Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Zichao Rong
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
- Bakar Institute of Digital Materials for the Planet, College of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States
| | - Daria Kurandina
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
- Bakar Institute of Digital Materials for the Planet, College of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States
| | - Ha L Nguyen
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
- Bakar Institute of Digital Materials for the Planet, College of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States
| | - Nakul Rampal
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
- Bakar Institute of Digital Materials for the Planet, College of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States
| | - Zhiling Zheng
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
- Bakar Institute of Digital Materials for the Planet, College of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States
| | - Laura Gagliardi
- Department of Chemistry, Pritzker School of Molecular Engineering, and Chicago Center for Theoretical Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Omar M Yaghi
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
- Bakar Institute of Digital Materials for the Planet, College of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States
- KACST-UC Berkeley Center of Excellence for Nanomaterials for Clean Energy Applications, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
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3
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Zheng Z, Alawadhi AH, Chheda S, Neumann SE, Rampal N, Liu S, Nguyen HL, Lin YH, Rong Z, Siepmann JI, Gagliardi L, Anandkumar A, Borgs C, Chayes JT, Yaghi OM. Shaping the Water-Harvesting Behavior of Metal-Organic Frameworks Aided by Fine-Tuned GPT Models. J Am Chem Soc 2023; 145:28284-28295. [PMID: 38090755 DOI: 10.1021/jacs.3c12086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
We construct a data set of metal-organic framework (MOF) linkers and employ a fine-tuned GPT assistant to propose MOF linker designs by mutating and modifying the existing linker structures. This strategy allows the GPT model to learn the intricate language of chemistry in molecular representations, thereby achieving an enhanced accuracy in generating linker structures compared with its base models. Aiming to highlight the significance of linker design strategies in advancing the discovery of water-harvesting MOFs, we conducted a systematic MOF variant expansion upon state-of-the-art MOF-303 utilizing a multidimensional approach that integrates linker extension with multivariate tuning strategies. We synthesized a series of isoreticular aluminum MOFs, termed Long-Arm MOFs (LAMOF-1 to LAMOF-10), featuring linkers that bear various combinations of heteroatoms in their five-membered ring moiety, replacing pyrazole with either thiophene, furan, or thiazole rings or a combination of two. Beyond their consistent and robust architecture, as demonstrated by permanent porosity and thermal stability, the LAMOF series offers a generalizable synthesis strategy. Importantly, these 10 LAMOFs establish new benchmarks for water uptake (up to 0.64 g g-1) and operational humidity ranges (between 13 and 53%), thereby expanding the diversity of water-harvesting MOFs.
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Affiliation(s)
- Zhiling Zheng
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
- Bakar Institute of Digital Materials for the Planet, College of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States
| | - Ali H Alawadhi
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
| | - Saumil Chheda
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
- Bakar Institute of Digital Materials for the Planet, College of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States
- Department of Chemical Engineering and Materials Science, Department of Chemistry, and Chemical Theory Center, University of Minnesota─Twin Cities, Minneapolis, Minnesota 55455, United States
| | - S Ephraim Neumann
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
| | - Nakul Rampal
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
- Bakar Institute of Digital Materials for the Planet, College of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States
| | - Shengchao Liu
- Bakar Institute of Digital Materials for the Planet, College of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720, United States
| | - Ha L Nguyen
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
| | - Yen-Hsu Lin
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
| | - Zichao Rong
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
- Bakar Institute of Digital Materials for the Planet, College of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States
| | - J Ilja Siepmann
- Department of Chemical Engineering and Materials Science, Department of Chemistry, and Chemical Theory Center, University of Minnesota─Twin Cities, Minneapolis, Minnesota 55455, United States
| | - Laura Gagliardi
- Department of Chemistry, Pritzker School of Molecular Engineering, Chicago Center for Theoretical Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Anima Anandkumar
- Computing and Mathematical Sciences, California Institute of Technology, Pasadena, California 91125, United States
- NVIDIA Corporation, Santa Clara, California 95051, United States
| | - Christian Borgs
- Bakar Institute of Digital Materials for the Planet, College of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720, United States
| | - Jennifer T Chayes
- Bakar Institute of Digital Materials for the Planet, College of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720, United States
- Department of Mathematics, University of California, Berkeley, California 94720, United States
- Department of Statistics, University of California, Berkeley, California 94720, United States
- School of Information, University of California, Berkeley, California 94720, United States
| | - Omar M Yaghi
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
- Bakar Institute of Digital Materials for the Planet, College of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States
- KACST-UC Berkeley Center of Excellence for Nanomaterials for Clean Energy Applications, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
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4
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Zheng Z, Rong Z, Nguyen HL, Yaghi OM. Structural Chemistry of Zeolitic Imidazolate Frameworks. Inorg Chem 2023; 62:20861-20873. [PMID: 38063312 DOI: 10.1021/acs.inorgchem.3c02322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2023]
Abstract
Zeolitic imidazolate frameworks (ZIFs) are a subclass of reticular structures based on tetrahedral four-connected networks of zeolites and minerals. They are composed of transition-metal ions and imidazolate-type linkers, and their pore size and shape, surface area, and functionality can be precisely controlled. Despite their potential, two questions remain unanswered: how to synthesize more diverse ZIF structures and how ZIFs differentiate from other crystalline solids. In other words, how can we use our understanding of their unique structures to better design and synthesize ZIFs? In this Review, we first summarize the methods for synthesizing a wide range of ZIFs. We then review the crystal structure of ZIFs and describe the relationship between their structure and properties using an in-depth analysis. We also discuss several important and intrinsic features that make ZIFs stand out from MOFs and discrete molecular cages. Finally, we outline the future direction for this class of porous crystals.
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Affiliation(s)
- Zhiling Zheng
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
- Bakar Institute of Digital Materials for the Planet, College of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States
| | - Zichao Rong
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
- Bakar Institute of Digital Materials for the Planet, College of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States
| | - Ha L Nguyen
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
- Bakar Institute of Digital Materials for the Planet, College of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States
| | - Omar M Yaghi
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States
- Bakar Institute of Digital Materials for the Planet, College of Computing, Data Science, and Society, University of California, Berkeley, California 94720, United States
- KACST-UC Berkeley Center of Excellence for Nanomaterials for Clean Energy Applications, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
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5
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Ahmad Aljafree NF, Ahmad MF, Abd Aziz U, Borzehandani MY, Mohamad Jaafar A, Asib N, Nguyen HL, Mohamed Tahir MI, Mohammad Latif MA, Cordova KE, Abdul Rahman MB. Calcium l-Malate and d-Tartarate Frameworks as Adjuvants for the Sustainable Delivery of a Fungicide. ACS Appl Mater Interfaces 2023. [PMID: 38109287 DOI: 10.1021/acsami.3c11697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
Agrichemical adjuvants that combine a highly selective, efficient, and active mode of operation are critically needed to realize a more sustainable approach to their usage. Herein, we report the synthesis and full characterization of two new metal-organic frameworks (MOFs), termed UPMOF-1 and UPMOF-2, that were constructed from eco-friendly Ca2+ ions and naturally occurring, low-molecular weight plant acids, l-malic and d-tartaric acid, respectively. Upon structural elucidation of both MOFs, a widely used fungicide, hexaconazole (Hex), was loaded on the structures, reaching binding affinities of -5.0 and -3.5 kcal mol-1 and loading capacities of 63% and 62% for Hex@UPMOF-1 and Hex@UPMOF-2, respectively, as a result of the formation of stable host-guest interactions. Given the framework chemistry of the MOFs and their predisposition to disassembly under relevant agricultural conditions, the sustained release kinetics were determined to show nearly quantitative release (98% and 95% for Hex@UPMOF-1 and Hex@UPMOF-2, respectively) after >500 h, a release profile drastically different than the control (>80% release in 24 h), from which the high efficiency of these new systems was established. To confirm their high selectivity and activity, in vitro and in vivo studies were performed to illustrate the abilities of Hex@UPMOF-1 and Hex@UPMOF-2 to combat the known aggressive pathogen Ganoderma boninense that causes basal stem rot disease in oil palm. Accordingly, at an extremely low concentration of 0.05 μg mL-1, both Hex@UPMOF-1 and Hex@UPMOF-2 were demonstrated to completely inhibit (100%) G. boninense growth, and during a 26 week in vivo nursery trial, the progression of basal stem rot infection was completely halted upon treatment with Hex@UPMOF-1 and Hex@UPMOF-2 and seedling growth was accelerated given the additional nutrients supplied via the disassembly of the MOFs. This study represents a significant step forward in the design of adjuvants to support the environmentally responsible use of agrichemical crop protection.
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Affiliation(s)
- Nurul Farhana Ahmad Aljafree
- Foundry of Reticular Materials for Sustainability, Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
| | - Mohamad Firdaus Ahmad
- Department of Plant Protection, Faculty of Agriculture, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
| | - Umar Abd Aziz
- Foundry of Reticular Materials for Sustainability, Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
| | - Mostafa Yousefzadeh Borzehandani
- Foundry of Reticular Materials for Sustainability, Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
| | - Adila Mohamad Jaafar
- Foundry of Reticular Materials for Sustainability, Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
- Centre of Foundation Studies for Agricultural Science, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
| | - Norhayu Asib
- Foundry of Reticular Materials for Sustainability, Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
- Department of Plant Protection, Faculty of Agriculture, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
| | - Ha L Nguyen
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Mohamed Ibrahim Mohamed Tahir
- Foundry of Reticular Materials for Sustainability, Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
| | - Muhammad Alif Mohammad Latif
- Foundry of Reticular Materials for Sustainability, Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
- Centre of Foundation Studies for Agricultural Science, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
| | - Kyle E Cordova
- Foundry of Reticular Materials for Sustainability, Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
- Integrated Materials Systems (iMS) Research Unit, Advanced Research Centre, Royal Scientific Society, Amman 11941, Jordan
| | - Mohd Basyaruddin Abdul Rahman
- Foundry of Reticular Materials for Sustainability, Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
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6
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Zheng Z, Zhang O, Nguyen HL, Rampal N, Alawadhi AH, Rong Z, Head-Gordon T, Borgs C, Chayes JT, Yaghi OM. ChatGPT Research Group for Optimizing the Crystallinity of MOFs and COFs. ACS Cent Sci 2023; 9:2161-2170. [PMID: 38033801 PMCID: PMC10683477 DOI: 10.1021/acscentsci.3c01087] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 10/20/2023] [Accepted: 10/23/2023] [Indexed: 12/02/2023]
Abstract
We leveraged the power of ChatGPT and Bayesian optimization in the development of a multi-AI-driven system, backed by seven large language model-based assistants and equipped with machine learning algorithms, that seamlessly orchestrates a multitude of research aspects in a chemistry laboratory (termed the ChatGPT Research Group). Our approach accelerated the discovery of optimal microwave synthesis conditions, enhancing the crystallinity of MOF-321, MOF-322, and COF-323 and achieving the desired porosity and water capacity. In this system, human researchers gained assistance from these diverse AI collaborators, each with a unique role within the laboratory environment, spanning strategy planning, literature search, coding, robotic operation, labware design, safety inspection, and data analysis. Such a comprehensive approach enables a single researcher working in concert with AI to achieve productivity levels analogous to those of an entire traditional scientific team. Furthermore, by reducing human biases in screening experimental conditions and deftly balancing the exploration and exploitation of synthesis parameters, our Bayesian search approach precisely zeroed in on optimal synthesis conditions from a pool of 6 million within a significantly shortened time scale. This work serves as a compelling proof of concept for an AI-driven revolution in the chemistry laboratory, painting a future where AI becomes an efficient collaborator, liberating us from routine tasks to focus on pushing the boundaries of innovation.
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Affiliation(s)
- Zhiling Zheng
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli
Energy Nanoscience Institute, University
of California, Berkeley, California 94720, United States
- Bakar
Institute of Digital Materials for the Planet, College of Computing,
Data Science, and Society, University of
California, Berkeley, California 94720, United States
| | - Oufan Zhang
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
- Kenneth
S. Pitzer Center for Theoretical Chemistry, University of California, Berkeley, California 94720, United States
| | - Ha L. Nguyen
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli
Energy Nanoscience Institute, University
of California, Berkeley, California 94720, United States
| | - Nakul Rampal
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli
Energy Nanoscience Institute, University
of California, Berkeley, California 94720, United States
- Bakar
Institute of Digital Materials for the Planet, College of Computing,
Data Science, and Society, University of
California, Berkeley, California 94720, United States
| | - Ali H. Alawadhi
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli
Energy Nanoscience Institute, University
of California, Berkeley, California 94720, United States
| | - Zichao Rong
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli
Energy Nanoscience Institute, University
of California, Berkeley, California 94720, United States
- Bakar
Institute of Digital Materials for the Planet, College of Computing,
Data Science, and Society, University of
California, Berkeley, California 94720, United States
| | - Teresa Head-Gordon
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
- Kenneth
S. Pitzer Center for Theoretical Chemistry, University of California, Berkeley, California 94720, United States
- Department
of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
- Department
of Bioengineering, University of California, Berkeley, California 94720, United States
| | - Christian Borgs
- Bakar
Institute of Digital Materials for the Planet, College of Computing,
Data Science, and Society, University of
California, Berkeley, California 94720, United States
- Department
of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720, United States
| | - Jennifer T. Chayes
- Bakar
Institute of Digital Materials for the Planet, College of Computing,
Data Science, and Society, University of
California, Berkeley, California 94720, United States
- Department
of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720, United States
- Department
of Mathematics, University of California, Berkeley, California 94720, United States
- Department
of Statistics, University of California, Berkeley, California 94720, United States
- School
of Information, University of California, Berkeley, California 94720, United States
| | - Omar M. Yaghi
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
- Kavli
Energy Nanoscience Institute, University
of California, Berkeley, California 94720, United States
- Bakar
Institute of Digital Materials for the Planet, College of Computing,
Data Science, and Society, University of
California, Berkeley, California 94720, United States
- KACST−UC Berkeley Center of Excellence for Nanomaterials for
Clean Energy Applications, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
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7
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Siddig LA, Alzard RH, Abdelhamid AS, Ramachandran T, Nguyen HL, Paz AP, Alzamly A. Cobalt Hydrogen-Bonded Organic Framework as a Visible Light-Driven Photocatalyst for CO 2 Cycloaddition Reaction. Inorg Chem 2023; 62:15550-15564. [PMID: 37698585 DOI: 10.1021/acs.inorgchem.3c02051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/13/2023]
Abstract
A novel cobalt hydrogen-bonded organic framework (Co-HOF, C24H14CoN4O8) was synthesized from a mixed linker, that is, 2,5-pyridinedicarboxylic acid (PDC) and 2,2'-bipyridyl (BPY) linkers and cobalt ion through a simple, one-pot, low-cost, and scalable solvothermal method. The Co-HOF was fully characterized using several analytical and spectroscopic techniques including single-crystal X-ray diffraction, diffuse reflectance spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy, energy-dispersive X-ray, and X-ray photoelectron spectroscopy. The Co-HOF exhibits high thermal and chemical stabilities compared to previously reported HOF materials. Moreover, Co-HOF shows excellent photocatalytic activity under visible light irradiation due to its narrow band gap of 2.05 eV. The cycloaddition reaction of CO2 to variable epoxides was investigated to evaluate the photocatalytic performance of Co-HOF under visible light radiation and was found to produce the corresponding cyclic carbonates in yields up to 99.9%.
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Affiliation(s)
- Lamia A Siddig
- Department of Chemistry, UAE University, P.O. Box 15551, Al-Ain 15551, UAE
| | - Reem H Alzard
- Department of Chemistry, UAE University, P.O. Box 15551, Al-Ain 15551, UAE
| | - Abdalla S Abdelhamid
- Department of Chemistry, UAE University, P.O. Box 15551, Al-Ain 15551, UAE
- Department of Chemical Engineering, UAE University, P.O. Box 15551, Al-Ain 15551, UAE
| | | | - Ha L Nguyen
- Berkeley Global Science Institute, University of California Berkeley, Berkeley,California 94720, United States
| | | | - Ahmed Alzamly
- Department of Chemistry, UAE University, P.O. Box 15551, Al-Ain 15551, UAE
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8
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Alzard RH, Siddig LA, Abdelhamid AS, Paz AP, Nguyen HL, Sethupathi K, Sreejith PK, Alzamly A. Lanthanide(III) (Er/Ho) coordination polymers for a photocatalytic CO 2 cycloaddition reaction. Dalton Trans 2023. [PMID: 37282596 DOI: 10.1039/d3dt01269g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Two new isostructural carboxylate-bridged lanthanide ribbons having the chemical formula [Ln2(4-ABA)6]n [4-ABA = 4-aminobenzoate, Ln: holmium (Ho) and erbium (Er)] were synthesized by a solvothermal method and fully characterized using multiple analytical, spectroscopic, and computational techniques. Single-crystal X-ray diffraction analysis reveals that both lanthanide coordination polymers (Ln-CPs) exhibit linear ribbon-like structures built up by dinuclear Ln2(4-ABA)6 units and bridged by carboxylate groups. Ln-CPs showed remarkably high thermal and chemical stabilities. Ho-CP and Er-CP exhibited similar band gaps of 3.21 eV and 3.22 eV, respectively, showing their photocatalytic ability under UV light. The photocatalytic activities of Ln-CPs were examined in the CO2 cycloaddition of epoxides to cyclic carbonates under solvent-free conditions, and full conversion (yields up to 99.9%) to the product was achieved. Ln-CP photocatalysts retained the same product yields over five consecutive cycles. Additionally, the experimental magnetic studies indicated that both Ln-CP crystals are antiferromagnetic at low T, which is confirmed by density functional theory calculations.
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Affiliation(s)
- Reem H Alzard
- Department of Chemistry, UAE University, P.O. Box 15551, Al-Ain, United Arab Emirates.
| | - Lamia A Siddig
- Department of Chemistry, UAE University, P.O. Box 15551, Al-Ain, United Arab Emirates.
| | - Abdalla S Abdelhamid
- Department of Chemistry, UAE University, P.O. Box 15551, Al-Ain, United Arab Emirates.
| | - Alejandro Perez Paz
- Department of Chemistry, UAE University, P.O. Box 15551, Al-Ain, United Arab Emirates.
| | - Ha L Nguyen
- Department of Chemistry, University of California Berkeley; Kavli Energy Nanoscience Institute at UC Berkeley; and Berkeley Global Science Institute, Berkeley, California 94720, USA
- Joint UAEU-UC Berkeley Laboratories for Materials Innovations, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
| | - K Sethupathi
- Low Temperature Physics Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India
| | - P K Sreejith
- Low Temperature Physics Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India
| | - Ahmed Alzamly
- Department of Chemistry, UAE University, P.O. Box 15551, Al-Ain, United Arab Emirates.
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9
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Abstract
Atmospheric water harvesting using reticular materials is an innovation that has the potential to change the world. Using covalent organic frameworks (COFs) for capturing water holds great promise because COFs are metal-free, stable under working conditions, and their structure can be intentionally designed to meet the requirements for this application. To promote the chemistry and use of COFs for atmospheric water harvesting, important features for synthesizing suitable water-harvesting COFs are discussed. The achievements of using COFs as water harvesters are then highlighted, showing how the water harvesting properties are related to the structural design. Finally, perspectives and research directions for further studies in COF chemistry are provided.
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Affiliation(s)
- Ha L Nguyen
- Department of Chemistry, University of California Berkeley, Berkeley, CA, 94720, USA
- Kavli Energy Nanoscience Institute at UC Berkeley, Berkeley, CA, 94720, USA
- Berkeley Global Science Institute, UC Berkeley, Berkeley, CA, 94720, USA
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10
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Elmehrath S, Nguyen HL, Karam SM, Amin A, Greish YE. BioMOF-Based Anti-Cancer Drug Delivery Systems. Nanomaterials (Basel) 2023; 13:953. [PMID: 36903831 PMCID: PMC10005089 DOI: 10.3390/nano13050953] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 02/19/2023] [Accepted: 03/03/2023] [Indexed: 06/18/2023]
Abstract
A variety of nanomaterials have been developed specifically for biomedical applications, such as drug delivery in cancer treatment. These materials involve both synthetic and natural nanoparticles and nanofibers of varying dimensions. The efficacy of a drug delivery system (DDS) depends on its biocompatibility, intrinsic high surface area, high interconnected porosity, and chemical functionality. Recent advances in metal-organic framework (MOF) nanostructures have led to the achievement of these desirable features. MOFs consist of metal ions and organic linkers that are assembled in different geometries and can be produced in 0, 1, 2, or 3 dimensions. The defining features of MOFs are their outstanding surface area, interconnected porosity, and variable chemical functionality, which enable an endless range of modalities for loading drugs into their hierarchical structures. MOFs, coupled with biocompatibility requisites, are now regarded as highly successful DDSs for the treatment of diverse diseases. This review aims to present the development and applications of DDSs based on chemically-functionalized MOF nanostructures in the context of cancer treatment. A concise overview of the structure, synthesis, and mode of action of MOF-DDS is provided.
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Affiliation(s)
- Sandy Elmehrath
- Department of Chemistry, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
| | - Ha L. Nguyen
- Department of Chemistry University of California—Berkeley, Kavli Energy Nanoscience Institute at UC Berkeley, and Berkeley Global Science Institute, Berkeley, CA 94720, USA
- Joint UAEU−UC Berkeley Laboratories for Materials Innovations, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
| | - Sherif M. Karam
- Department of Anatomy, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
- Zayed Centre for Health Sciences, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
| | - Amr Amin
- Zayed Centre for Health Sciences, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
- Department of Biology, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
| | - Yaser E. Greish
- Department of Chemistry, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
- Joint UAEU−UC Berkeley Laboratories for Materials Innovations, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
- Zayed Centre for Health Sciences, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
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11
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Zha X, Li X, Al‐Omari AA, Liu S, Liang C, Al‐Ghourani A, Abdellatief M, Yang J, Nguyen HL, Al‐Maythalony B, Shi Z, Cordova KE, Zhang Y. Zeolite NPO‐Type Azolate Frameworks. Angew Chem Int Ed Engl 2022; 61:e202207467. [DOI: 10.1002/anie.202207467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Indexed: 11/12/2022]
Affiliation(s)
- Xiangyi Zha
- Shanghai Key Laboratory of High-Resolution Electron Microscopy School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Xinhao Li
- Shanghai Key Laboratory of High-Resolution Electron Microscopy School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Abdulhadi A. Al‐Omari
- Center of Research Excellence in Nanotechnology (CENT) Department of Chemical Engineering King Fahd University of Petroleum and Minerals Dhahran 34464 Saudi Arabia
| | - Shan Liu
- Shanghai Key Laboratory of High-Resolution Electron Microscopy School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Cong‐Cong Liang
- Shanghai Key Laboratory of High-Resolution Electron Microscopy School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Ala'a Al‐Ghourani
- Materials Discovery Research Unit Advanced Research Center Royal Scientific Society Amman 11941 Jordan
| | - Mahmoud Abdellatief
- Synchrotron-light for Experimental Science and Applications in the Middle East (SESAME) Allan 19252 Jordan
| | - Jingjing Yang
- Department of Chemistry and Berkeley Global Science Institute University of California, Berkeley Berkeley CA 94720 USA
| | - Ha L. Nguyen
- Department of Chemistry and Berkeley Global Science Institute University of California, Berkeley Berkeley CA 94720 USA
| | - Bassem Al‐Maythalony
- Materials Discovery Research Unit Advanced Research Center Royal Scientific Society Amman 11941 Jordan
- KACST-TIC on CCS King Fahd University of Petroleum and Minerals Dhahran 34464 Saudi Arabia
| | - Zhaolin Shi
- Shanghai Key Laboratory of High-Resolution Electron Microscopy School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Kyle E. Cordova
- Materials Discovery Research Unit Advanced Research Center Royal Scientific Society Amman 11941 Jordan
| | - Yue‐Biao Zhang
- Shanghai Key Laboratory of High-Resolution Electron Microscopy School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
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12
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Zha X, Li X, Al‐Omari AA, Liu S, Liang C, Al‐Ghourani A, Abdellatief M, Yang J, Nguyen HL, Al‐Maythalony B, Shi Z, Cordova KE, Zhang Y. Back Cover: Zeolite NPO‐Type Azolate Frameworks (Angew. Chem. Int. Ed. 39/2022). Angew Chem Int Ed Engl 2022. [DOI: 10.1002/anie.202210792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xiangyi Zha
- Shanghai Key Laboratory of High-Resolution Electron Microscopy School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Xinhao Li
- Shanghai Key Laboratory of High-Resolution Electron Microscopy School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Abdulhadi A. Al‐Omari
- Center of Research Excellence in Nanotechnology (CENT) Department of Chemical Engineering King Fahd University of Petroleum and Minerals Dhahran 34464 Saudi Arabia
| | - Shan Liu
- Shanghai Key Laboratory of High-Resolution Electron Microscopy School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Cong‐Cong Liang
- Shanghai Key Laboratory of High-Resolution Electron Microscopy School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Ala'a Al‐Ghourani
- Materials Discovery Research Unit Advanced Research Center Royal Scientific Society Amman 11941 Jordan
| | - Mahmoud Abdellatief
- Synchrotron-light for Experimental Science and Applications in the Middle East (SESAME) Allan 19252 Jordan
| | - Jingjing Yang
- Department of Chemistry and Berkeley Global Science Institute University of California, Berkeley Berkeley CA 94720 USA
| | - Ha L. Nguyen
- Department of Chemistry and Berkeley Global Science Institute University of California, Berkeley Berkeley CA 94720 USA
| | - Bassem Al‐Maythalony
- Materials Discovery Research Unit Advanced Research Center Royal Scientific Society Amman 11941 Jordan
- KACST-TIC on CCS King Fahd University of Petroleum and Minerals Dhahran 34464 Saudi Arabia
| | - Zhaolin Shi
- Shanghai Key Laboratory of High-Resolution Electron Microscopy School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Kyle E. Cordova
- Materials Discovery Research Unit Advanced Research Center Royal Scientific Society Amman 11941 Jordan
| | - Yue‐Biao Zhang
- Shanghai Key Laboratory of High-Resolution Electron Microscopy School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
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13
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Zha X, Li X, Al‐Omari AA, Liu S, Liang C, Al‐Ghourani A, Abdellatief M, Yang J, Nguyen HL, Al‐Maythalony B, Shi Z, Cordova KE, Zhang Y. Zeolite NPO‐Type Azolate Frameworks. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202210792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xiangyi Zha
- Shanghai Key Laboratory of High-Resolution Electron Microscopy School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Xinhao Li
- Shanghai Key Laboratory of High-Resolution Electron Microscopy School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Abdulhadi A. Al‐Omari
- Center of Research Excellence in Nanotechnology (CENT) Department of Chemical Engineering King Fahd University of Petroleum and Minerals Dhahran 34464 Saudi Arabia
| | - Shan Liu
- Shanghai Key Laboratory of High-Resolution Electron Microscopy School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Cong‐Cong Liang
- Shanghai Key Laboratory of High-Resolution Electron Microscopy School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Ala'a Al‐Ghourani
- Materials Discovery Research Unit Advanced Research Center Royal Scientific Society Amman 11941 Jordan
| | - Mahmoud Abdellatief
- Synchrotron-light for Experimental Science and Applications in the Middle East (SESAME) Allan 19252 Jordan
| | - Jingjing Yang
- Department of Chemistry and Berkeley Global Science Institute University of California, Berkeley Berkeley CA 94720 USA
| | - Ha L. Nguyen
- Department of Chemistry and Berkeley Global Science Institute University of California, Berkeley Berkeley CA 94720 USA
| | - Bassem Al‐Maythalony
- Materials Discovery Research Unit Advanced Research Center Royal Scientific Society Amman 11941 Jordan
- KACST-TIC on CCS King Fahd University of Petroleum and Minerals Dhahran 34464 Saudi Arabia
| | - Zhaolin Shi
- Shanghai Key Laboratory of High-Resolution Electron Microscopy School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
| | - Kyle E. Cordova
- Materials Discovery Research Unit Advanced Research Center Royal Scientific Society Amman 11941 Jordan
| | - Yue‐Biao Zhang
- Shanghai Key Laboratory of High-Resolution Electron Microscopy School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
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14
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Siddig LA, Alzard RH, Nguyen HL, Alzamly A. Cyclic carbonate formation from cycloaddition of CO2 to epoxides over bismuth subgallate photocatalyst. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Nguyen HL, Gropp C, Hanikel N, Möckel A, Lund A, Yaghi OM. Hydrazine-Hydrazide-Linked Covalent Organic Frameworks for Water Harvesting. ACS Cent Sci 2022; 8:926-932. [PMID: 35912353 PMCID: PMC9336147 DOI: 10.1021/acscentsci.2c00398] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report a postsynthetic strategy and its implementation to make covalent organic frameworks (COFs) with irreversible hydrazide linkages. This involved the synthesis of three 2D and 3D hydrazine-linked frameworks and their partial oxidation. The linkage synthesis and functional group transformation-hydrazine and hydrazide-were evidenced by 15N multi-CP-MAS NMR. In addition, the isothermal water uptake profiles of these frameworks were studied, leading to the discovery of one hydrazine-hydrazide-linked COF suitable for water harvesting from air in arid conditions. This COF displayed characteristic S-shaped water sorption profiles, a steep pore-filling step below 18% relative humidity at 25 °C, and a total uptake capacity of 0.45 g g-1. We found that even small changes made on the molecular level can lead to major differences in the water isotherm profiles, therefore pointing to the utility of water sorption analysis as a complementary analytical tool to study linkage transformations.
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Affiliation(s)
- Ha L. Nguyen
- Department
of Chemistry, University of California−Berkeley,
Kavli Energy Nanoscience Institute at UC Berkeley; and Berkeley Global
Science Institute, Berkeley, California 94720, United States
- Joint
UAEU−UC Berkeley Laboratories for Materials Innovations, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
| | - Cornelius Gropp
- Department
of Chemistry, University of California−Berkeley,
Kavli Energy Nanoscience Institute at UC Berkeley; and Berkeley Global
Science Institute, Berkeley, California 94720, United States
| | - Nikita Hanikel
- Department
of Chemistry, University of California−Berkeley,
Kavli Energy Nanoscience Institute at UC Berkeley; and Berkeley Global
Science Institute, Berkeley, California 94720, United States
| | - Anna Möckel
- Department
of Chemistry, University of California−Berkeley,
Kavli Energy Nanoscience Institute at UC Berkeley; and Berkeley Global
Science Institute, Berkeley, California 94720, United States
| | - Alicia Lund
- Department
of Chemistry, University of California−Berkeley, Berkeley, California 94720, United States
| | - Omar M. Yaghi
- Department
of Chemistry, University of California−Berkeley,
Kavli Energy Nanoscience Institute at UC Berkeley; and Berkeley Global
Science Institute, Berkeley, California 94720, United States
- Joint
UAEU−UC Berkeley Laboratories for Materials Innovations, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
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16
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Alzamly A, Bakiro M, Hussein Ahmed S, Siddig LA, Nguyen HL. Linear α-olefin oligomerization and polymerization catalyzed by metal-organic frameworks. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214522] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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17
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Zha X, Li X, Al-Omari AA, Liu S, Liang CC, Al-Ghourani A, Abdellatief M, Yang J, Nguyen HL, Al-Maythalony B, Shi Z, Cordova KE, Zhang YB. Zeolite NPO‐Type Azolate Frameworks. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202207467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xiangyi Zha
- ShanghaiTech University School of Physical Science and Technology CHINA
| | - Xinhao Li
- ShanghaiTech University School of Physical Science and Technology CHINA
| | - Abdulhadi A. Al-Omari
- King Fahd University of Petroleum & Minerals Department of Chemical Engineering SAUDI ARABIA
| | - Shan Liu
- ShanghaiTech University School of Physical Science and Technology CHINA
| | - Cong-Cong Liang
- ShanghaiTech University School of Physical Science and Technology CHINA
| | | | - Mahmoud Abdellatief
- Synchroton-light for Experimental Science and Applications in the Middle East MS Beamline JORDAN
| | - Jingjing Yang
- UC Berkeley: University of California Berkeley Department of Chemistry UNITED STATES
| | - Ha L. Nguyen
- UC Berkeley: University of California Berkeley Department of Chemistry UNITED STATES
| | | | - Zhaolin Shi
- ShanghaiTech University School of Physical Science and Technology CHINA
| | - Kyle E. Cordova
- Royal Scientific Society Advanced Research Centre 40 Ahmad Al Tarawaneh Street 11941 Amman JORDAN
| | - Yue-Biao Zhang
- ShanghaiTech University School of Physical Science and Technology CHINA
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18
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Abstract
The opinion is provided about the stability and photocatalytic capability of metal-organic frameworks in photocatalytic overall water splitting.
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Affiliation(s)
- Ha L Nguyen
- Department of Chemistry, University of California Berkeley, Berkeley, CA, 94720, USA
- Joint UAEU-UC Berkeley Laboratories for Materials Innovations, United Arab Emirates University, Al-Ain, 15551, United Arab Emirates
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19
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Siddig L, Alzard RH, Nguyen HL, Göb CR, Alnaqbi MA, Alzamly A. Hexagonal Layer Manganese Metal-Organic Framework for Photocatalytic CO 2 Cycloaddition Reaction. ACS Omega 2022; 7:9958-9963. [PMID: 35350318 PMCID: PMC8945067 DOI: 10.1021/acsomega.2c00663] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 03/02/2022] [Indexed: 05/05/2023]
Abstract
A novel manganese metal-organic framework (Mn-MOF) termed UAEU-50 assembled from a benzenedicarboxylate linker (BDC) and trinuclear manganese clusters was synthesized and fully characterized using different spectroscopic and analytic techniques (e.g., X-ray powder diffraction, UV-vis diffuse reflectance spectroscopy, thermogravimetric analysis, scanning electron microscopy, and energy-dispersive X-ray spectroscopy). UAEU-50 adopted a hexagonal layer structure and exhibited superior thermal stability and robust chemical stability. Photocatalytic activities of UAEU-50 were investigated using the cycloaddition of CO2 to different epoxides, forming cyclic carbonates. Impressively, UAEU-50 can transform up to 90% photocatalytic CO2 conversion to cyclic carbonates in the visible-light region at ambient conditions.
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Affiliation(s)
- Lamia
A. Siddig
- Department
of Chemistry, UAE University, P.O. Box 15551, Al-Ain 00000, UAE
| | - Reem H. Alzard
- Department
of Chemistry, UAE University, P.O. Box 15551, Al-Ain 00000, UAE
| | - Ha L. Nguyen
- Berkeley
Global Science Institute, University of
California, Berkeley, California 94720, United States
| | - Christian R. Göb
- Rigaku
Europe SE, Hugenottenallee 167, Neu-Isenburg 63263, Germany
| | - Mohamed A. Alnaqbi
- Department
of Chemistry, UAE University, P.O. Box 15551, Al-Ain 00000, UAE
| | - Ahmed Alzamly
- Department
of Chemistry, UAE University, P.O. Box 15551, Al-Ain 00000, UAE
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20
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Jin F, Nguyen HL, Zhong Z, Han X, Zhu C, Pei X, Ma Y, Yaghi OM. Entanglement of Square Nets in Covalent Organic Frameworks. J Am Chem Soc 2022; 144:1539-1544. [DOI: 10.1021/jacs.1c13468] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Fangying Jin
- Department of Chemistry, University of California−Berkeley, Kavli Energy Nanoscience Institute at UC Berkeley, and Berkeley Global Science Institute, Berkeley, California 94720, United States
| | - Ha L. Nguyen
- Department of Chemistry, University of California−Berkeley, Kavli Energy Nanoscience Institute at UC Berkeley, and Berkeley Global Science Institute, Berkeley, California 94720, United States
- Joint UAEU−UC Berkeley Laboratories for Materials Innovations, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
| | - Zhiye Zhong
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Xing Han
- Department of Chemistry, University of California−Berkeley, Kavli Energy Nanoscience Institute at UC Berkeley, and Berkeley Global Science Institute, Berkeley, California 94720, United States
| | - Chenhui Zhu
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Xiaokun Pei
- Department of Chemistry, University of California−Berkeley, Kavli Energy Nanoscience Institute at UC Berkeley, and Berkeley Global Science Institute, Berkeley, California 94720, United States
| | - Yanhang Ma
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Omar M. Yaghi
- Department of Chemistry, University of California−Berkeley, Kavli Energy Nanoscience Institute at UC Berkeley, and Berkeley Global Science Institute, Berkeley, California 94720, United States
- Joint UAEU−UC Berkeley Laboratories for Materials Innovations, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
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21
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Affiliation(s)
- Ha L. Nguyen
- Department of Chemistry, United Arab Emirates University Al-Ain 15551, United Arab Emirates
- Joint UAEU−UC Berkeley Laboratories for Materials Innovations, UAE University, Al-Ain 15551, United Arab Emirates
| | - Ahmed Alzamly
- Department of Chemistry, United Arab Emirates University Al-Ain 15551, United Arab Emirates
- Joint UAEU−UC Berkeley Laboratories for Materials Innovations, UAE University, Al-Ain 15551, United Arab Emirates
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22
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Ali A, Alzamly A, Greish YE, Bakiro M, Nguyen HL, Mahmoud ST. A Highly Sensitive and Flexible Metal-Organic Framework Polymer-Based H 2S Gas Sensor. ACS Omega 2021; 6:17690-17697. [PMID: 34278154 PMCID: PMC8280656 DOI: 10.1021/acsomega.1c02295] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Accepted: 06/22/2021] [Indexed: 05/02/2023]
Abstract
We report the fabrication of a novel metal-organic framework (MOF)-polymer mixed-matrix flexible membrane for the detection of hydrogen sulfide (H2S) gas at room temperature. This high-performance gas sensor is based on MOF-5 microparticles embedded on a conductivity-controlled chitosan (CS) organic membrane. The conductivity of the organic membrane is controlled by blending it with a glycerol ionic liquid (IL) at different concentrations. The sensor showed a remarkable detection sensitivity for H2S gas at a concentrations level as low as 1 ppm at room temperature. The MOF-5/CS/IL gas sensor demonstrates a highly desirable detection selectivity, fast response time (<8 s), recovery time of less than 30 s, and outstanding sensing stability averaging at 97% detection with 50 ppm of H2S gas. This composite having high sensitivity, low-power consumption, and flexibility holds great promise for addressing current challenges pertinent to environmental sustainability.
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Affiliation(s)
- Ashraf Ali
- Department
of Physics, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
| | - Ahmed Alzamly
- Department
of Chemistry, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
| | - Yaser E Greish
- Department
of Chemistry, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
| | - Maram Bakiro
- Department
of Chemistry, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
| | - Ha L. Nguyen
- Department
of Chemistry, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
- Berkeley
Global Science Institute, Berkeley, California 94720, United States
| | - Saleh T. Mahmoud
- Department
of Physics, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
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23
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Abstract
Reticular chemistry of covalent organic frameworks (COFs) deals with the linking of discrete organic molecular building units into extended structures adopting various topologies by strong covalent bonds. The past decade has witnessed a rapid development of COF chemistry in terms of both structural diversity and applications. From the structural perspective, irrespective of our subject of concern with regard to COFs, it is inevitable to take into account the structural aspects of COFs in all dimensions from 1D ribbons to 3D frameworks, for which understanding the concepts of reticular chemistry, based mainly on 'reticular design', will seemingly lead to unlimited ways of exploring the exquisiteness of this advanced class of porous, extended, and crystalline materials. A comprehensive discussion and understanding of reticular design, therefore, is of paramount importance so that everyone willing to research on COFs can interpret well and chemically correlate the geometrical structures of this subset of reticular materials and their practical applications. This article lies at the heart of using the conceptual basis of reticular chemistry for designing, modeling, and determination of novel infinite and crystalline structures. Especially, the structure determinations are described by means of chronological advances of discoveries and development of COFs whereby their crystal structures are elucidated by modeling through the topological approach, 3D electron diffraction, single-crystal X-ray diffraction, and powder X-ray diffraction techniques.
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Affiliation(s)
- Ha L Nguyen
- Department of Chemistry, UAE University Al-Ain 15551 United Arab Emirates
- Joint UAEU-UC Berkeley Laboratories for Materials Innovations, UAE University Al-Ain 15551 United Arab Emirates
- Berkeley Global Science Institute Berkeley California 94720 USA
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24
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Al Neyadi SS, Al Blooshi AG, Nguyen HL, Alnaqbi MA. UiO-66-NH 2 as an effective solid support for quinazoline derivatives for antibacterial agents against Gram-negative bacteria. NEW J CHEM 2021. [DOI: 10.1039/d1nj03749h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
UiO-66-NH2 is used as an effective drug carrier for the control of quinazoline release for antibacterial agents against Gram-negative bacteria.
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Affiliation(s)
- Shaikha S. Al Neyadi
- Department of Chemistry, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
| | - Afra G. Al Blooshi
- Department of Chemistry, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
| | - Ha L. Nguyen
- Department of Chemistry, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
- Joint UAEU, UC Berkeley Laboratories for Materials Innovations, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
| | - Mohamed. A. Alnaqbi
- Department of Chemistry, United Arab Emirates University, Al-Ain 15551, United Arab Emirates
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Nguyen HL, Gropp C, Ma Y, Zhu C, Yaghi OM. 3D Covalent Organic Frameworks Selectively Crystallized through Conformational Design. J Am Chem Soc 2020; 142:20335-20339. [PMID: 33186498 DOI: 10.1021/jacs.0c11064] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We present a strategy whereby selective formation of imine covalent organic frameworks (COFs) based on linking of triangles and squares into the fjh topology was achieved by the conformational design of the building units. 1,3,5-Trimethyl-2,4,6-tris(4-formylphenyl)benzene (TTFB, triangle) and 1,1,2,2-tetrakis(4-aminophenyl)ethene (ETTA, square) were reticulated into [(TTFB)4(ETTA)3]imine, termed COF-790, which was fully characterized by spectroscopic, microscopic, and X-ray diffraction techniques. COF-790 exhibits permanent porosity and a Brunauer-Emmett-Teller (BET) surface area of 2650 m2 g-1. Key to the formation of this COF in crystalline form is the pre-designed conformation of the triangle and the square units to give dihedral angles in the range of 75-90°, without which the reaction results in the formation of amorphous product. We demonstrate the versatility of our strategy by also reporting the synthesis and characterization of two isoreticular forms of COF-790, COF-791 and COF-792, based on other square building units.
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Affiliation(s)
- Ha L Nguyen
- Department of Chemistry, University of California Berkeley; Kavli Energy Nanoscience Institute at UC Berkeley; and Berkeley Global Science Institute, Berkeley, California 94720, United States
- Joint UAEU-UC Berkeley Laboratories for Materials Innovations
| | - Cornelius Gropp
- Department of Chemistry, University of California Berkeley; Kavli Energy Nanoscience Institute at UC Berkeley; and Berkeley Global Science Institute, Berkeley, California 94720, United States
| | - Yanhang Ma
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Chenhui Zhu
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Omar M Yaghi
- Department of Chemistry, University of California Berkeley; Kavli Energy Nanoscience Institute at UC Berkeley; and Berkeley Global Science Institute, Berkeley, California 94720, United States
- Joint UAEU-UC Berkeley Laboratories for Materials Innovations
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Affiliation(s)
- Ha L. Nguyen
- Department of Chemistry, University of California—Berkeley; Kavli Energy Nanoscience Institute at UC Berkeley; Berkeley Global Science Institute; and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Cornelius Gropp
- Department of Chemistry, University of California—Berkeley; Kavli Energy Nanoscience Institute at UC Berkeley; Berkeley Global Science Institute; and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Omar M. Yaghi
- Department of Chemistry, University of California—Berkeley; Kavli Energy Nanoscience Institute at UC Berkeley; Berkeley Global Science Institute; and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- UC Berkeley-KACST Joint Center of Excellence for Nanomaterials for Clean Energy Applications, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
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Nguyen HL, Hanikel N, Lyle SJ, Zhu C, Proserpio DM, Yaghi OM. A Porous Covalent Organic Framework with Voided Square Grid Topology for Atmospheric Water Harvesting. J Am Chem Soc 2020; 142:2218-2221. [DOI: 10.1021/jacs.9b13094] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Ha L. Nguyen
- Department of Chemistry, University of California—Berkeley; Kavli Energy Nanoscience Institute at UC Berkeley; Berkeley Global Science Institute; and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Nikita Hanikel
- Department of Chemistry, University of California—Berkeley; Kavli Energy Nanoscience Institute at UC Berkeley; Berkeley Global Science Institute; and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Steven J. Lyle
- Department of Chemistry, University of California—Berkeley; Kavli Energy Nanoscience Institute at UC Berkeley; Berkeley Global Science Institute; and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Chenhui Zhu
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Davide M. Proserpio
- Dipartimento di Chimica, Università degli Studi di Milano, Milano 20133, Italy
- Samara Center for Theoretical Materials Science, Samara State Technical University, Samara 443100, Russia
| | - Omar M. Yaghi
- Department of Chemistry, University of California—Berkeley; Kavli Energy Nanoscience Institute at UC Berkeley; Berkeley Global Science Institute; and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- UC Berkeley-KACST Joint Center of Excellence for Nanomaterials for Clean Energy Applications, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
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Helal A, Nguyen HL, Al-Ahmed A, Cordova KE, Yamani ZH. An Ultrasensitive and Selective Metal–Organic Framework Chemosensor for Palladium Detection in Water. Inorg Chem 2019; 58:1738-1741. [DOI: 10.1021/acs.inorgchem.8b02871] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Ha L. Nguyen
- Department of Chemistry and Berkeley Global Science Institute, University of California, Berkeley, Berkeley, California 94720, United States
| | | | - Kyle E. Cordova
- Department of Chemistry and Berkeley Global Science Institute, University of California, Berkeley, Berkeley, California 94720, United States
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Al-Omari AA, Yamani ZH, Nguyen HL. Electrocatalytic CO₂ Reduction: From Homogeneous Catalysts to Heterogeneous-Based Reticular Chemistry. Molecules 2018; 23:E2835. [PMID: 30388731 PMCID: PMC6278299 DOI: 10.3390/molecules23112835] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 10/20/2018] [Accepted: 10/22/2018] [Indexed: 11/17/2022] Open
Abstract
CO₂, emitted mainly from fossil fuel combustion, is one of the major greenhouse gases. CO₂ could be converted into more valuable chemical feedstocks including CO, HCOOH, HCHO, CH₃OH, or CH₄. To reduce CO₂, catalysts were designed and their unique characteristics were utilized based on types of reaction processes, including catalytic hydrogenation, complex metal hydrides, photocatalysis, biological reduction, and electrochemical reduction. Indeed, the electroreduction method has received much consideration lately due to the simple operation, as well as environmentally friendly procedures that need to be optimized by both of the catalysts and the electrochemical process. In the past few decades, we have witnessed an explosion in development in materials science-especially in regards to the porous crystalline materials based on the strong covalent bond of the organic linkers containing light elements (Covalent organic frameworks, COFs), as well as the hybrid materials that possess organic backbones and inorganic metal-oxo clusters (Metal-organic frameworks, MOFs). Owing to the large surface area and high active site density that belong to these tailorable structures, MOFs and COFs can be applied to many practical applications, such as gas storage and separation, drug release, sensing, and catalysis. Beyond those applications, which have been abundantly studied since the 1990s, CO₂ reduction catalyzed by reticular and extended structures of MOFs or COFs has been more recently turned to the next step of state-of-the-art application. In this perspective, we highlight the achievement of homogeneous catalysts used for CO₂ electrochemical conversion and contrast it with the advances in new porous catalyst-based reticular chemistry. We then discuss the role of new catalytic systems designed in light of reticular chemistry in the heterogeneous-catalyzed reduction of CO₂.
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Affiliation(s)
- Abdulhadi A Al-Omari
- Department of Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
- Center for Research Excellence in Nanotechnology (CENT), King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
| | - Zain H Yamani
- Center for Research Excellence in Nanotechnology (CENT), King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
| | - Ha L Nguyen
- Center for Research Excellence in Nanotechnology (CENT), King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
- Vietnam National University-Hochiminh, Hochiminh City 721337, Vietnam.
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Tu TN, Nguyen MV, Nguyen HL, Yuliarto B, Cordova KE, Demir S. Designing bipyridine-functionalized zirconium metal–organic frameworks as a platform for clean energy and other emerging applications. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.03.014] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Abstract
The chemistry of Ti-based MOFs, including their synthetic methods, crystal structures, topological evaluation, and promising applications, is precisely summarized and discussed.
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Affiliation(s)
- Ha L. Nguyen
- Center for Innovative Materials and Architectures (INOMAR)
- Vietnam National University-Ho Chi Minh (VNU-HCM)
- Ho Chi Minh City 721337
- Vietnam
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32
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Nguyen LHT, Nguyen TT, Nguyen HL, Doan TLH, Tran PH. A new superacid hafnium-based metal–organic framework as a highly active heterogeneous catalyst for the synthesis of benzoxazoles under solvent-free conditions. Catal Sci Technol 2017. [DOI: 10.1039/c7cy01668a] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new superacid Hf-based MOF, termed VNU-11-P-SO4, was used as an efficient heterogeneous catalyst for solvent-free 2-arylbenzoxazole synthesis.
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Affiliation(s)
- Linh H. T. Nguyen
- Center for Innovative Materials and Architectures
- Vietnam National University – Ho Chi Minh City
- Vietnam
| | - The T. Nguyen
- Faculty of Chemistry
- University of Science
- Vietnam National University – Ho Chi Minh City
- Vietnam
| | - Ha L. Nguyen
- Center for Innovative Materials and Architectures
- Vietnam National University – Ho Chi Minh City
- Vietnam
| | - Tan L. H. Doan
- Center for Innovative Materials and Architectures
- Vietnam National University – Ho Chi Minh City
- Vietnam
- Faculty of Chemistry
- University of Science
| | - Phuong Hoang Tran
- Faculty of Chemistry
- University of Science
- Vietnam National University – Ho Chi Minh City
- Vietnam
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Tran TV, Le HTN, Ha HQ, Duong XNT, Nguyen LHT, Doan TLH, Nguyen HL, Truong T. A five coordination Cu(ii) cluster-based MOF and its application in the synthesis of pharmaceuticals via sp3 C–H/N–H oxidative coupling. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00882a] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Five coordination sites of Cu(ii) cluster were found in VNU-18 that showed highly efficient catalytic property for the oxidative C–H activation via N–H bonds.
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Affiliation(s)
- Thuan V. Tran
- Faculty of Chemical Engineering
- Bach Khoa University
- VNU-HCM
- Ho Chi Minh City
- Vietnam
| | | | - Hiep Q. Ha
- Faculty of Chemical Engineering
- Bach Khoa University
- VNU-HCM
- Ho Chi Minh City
- Vietnam
| | - Xuan N. T. Duong
- Faculty of Chemical Engineering
- Bach Khoa University
- VNU-HCM
- Ho Chi Minh City
- Vietnam
| | - Linh H.-T. Nguyen
- Center for Innovative Materials and Architectures (INOMAR)
- VNU-HCM
- Ho Chi Minh City
- Vietnam
| | - Tan L. H. Doan
- Center for Innovative Materials and Architectures (INOMAR)
- VNU-HCM
- Ho Chi Minh City
- Vietnam
- Faculty of Chemistry
| | - Ha L. Nguyen
- Center for Innovative Materials and Architectures (INOMAR)
- VNU-HCM
- Ho Chi Minh City
- Vietnam
| | - Thanh Truong
- Faculty of Chemical Engineering
- Bach Khoa University
- VNU-HCM
- Ho Chi Minh City
- Vietnam
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Nguyen HL, Vu TT, Le D, Doan TLH, Nguyen VQ, Phan NTS. A Titanium–Organic Framework: Engineering of the Band-Gap Energy for Photocatalytic Property Enhancement. ACS Catal 2016. [DOI: 10.1021/acscatal.6b02642] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ha L. Nguyen
- Faculty
of Chemical Engineering, University of Technology, Vietnam National University−Ho Chi Minh City (VNU−HCM), Ho Chi Minh City 721337, Vietnam
- Center
for Innovative Materials and Architectures (INOMAR), Vietnam National University−Ho Chi Minh City (VNU−HCM), Ho Chi Minh City 721337, Vietnam
| | - Thanh T. Vu
- Center
for Innovative Materials and Architectures (INOMAR), Vietnam National University−Ho Chi Minh City (VNU−HCM), Ho Chi Minh City 721337, Vietnam
| | - Dinh Le
- Center
for Innovative Materials and Architectures (INOMAR), Vietnam National University−Ho Chi Minh City (VNU−HCM), Ho Chi Minh City 721337, Vietnam
| | - Tan L. H. Doan
- Center
for Innovative Materials and Architectures (INOMAR), Vietnam National University−Ho Chi Minh City (VNU−HCM), Ho Chi Minh City 721337, Vietnam
- Faculty
of Chemistry, University of Science, Vietnam National University−Ho Chi Minh City (VNU−HCM), Ho Chi Minh City 721337, Vietnam
| | - Viet Q. Nguyen
- National
Key Lab for Polymer and Composite, University of Technology, Vietnam National University−Ho Chi Minh City (VNU−HCM), Ho Chi Minh City 721337, Vietnam
| | - Nam T. S. Phan
- Faculty
of Chemical Engineering, University of Technology, Vietnam National University−Ho Chi Minh City (VNU−HCM), Ho Chi Minh City 721337, Vietnam
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Trinh QM, Nguyen HL, Do TN, Nguyen VN, Nguyen BH, Nguyen TVA, Sintchenko V, Marais BJ. Tuberculosis and HIV co-infection in Vietnam. Int J Infect Dis 2016; 46:56-60. [PMID: 27044521 DOI: 10.1016/j.ijid.2016.03.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 03/24/2016] [Indexed: 10/22/2022] Open
Abstract
UNLABELLED Tuberculosis (TB) and human immunodeficiency virus (HIV) infection are leading causes of disease and death in Vietnam, but TB/HIV disease trends and the profile of co-infected patients are poorly described. METHODS We examined national TB and HIV notification data to provide a geographic overview and describe relevant disease trends within Vietnam. We also compared the demographic and clinical profiles of TB patients with and without HIV infection. RESULTS During the past 10 years (2005-2014) cumulative HIV case numbers and deaths increased to 298,151 and 71,332 respectively, but access to antiretroviral therapy (ART) improved and new infections and deaths declined. From 2011-2014 routine HIV testing of TB patients increased from 58.9% to 72.5% and of all TB patients diagnosed with HIV in 2014, 2,803 (72.4%) received ART. The number of multidrug resistant (MDR)-TB cases enrolled for treatment increased almost 3-fold (578 to 1,532) from 2011-2014. The rate of HIV co-infection in MDR and non-MDR TB cases (51/1,532; 3.3% vs 3,774/100,555; 3.8%; OR 0.77, 95% CI 0.7-1.2) was similar in 2014. CONCLUSIONS The care of TB/HIV co-infected patients have shown sustained improvement in Vietnam. Rising numbers of MDR-TB cases is a concern, but this is not "driven" by HIV co-infection.
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Affiliation(s)
- Q M Trinh
- Marie Bashir Institute for Infectious Diseases and Biosecurity (MBI), The University of Sydney, Sydney, Australia; NSW Mycobacterium Reference Laboratory, Centre for Infectious Disease and Microbiology - Public Health, ICPMR, Westmead Hospital, Sydney, Australia; Vietnam National Institute of Hygiene and Epidemiology, Hanoi, Vietnam.
| | - H L Nguyen
- Vietnam Administration of HIV/AIDS Control, Hanoi, Vietnam
| | - T N Do
- Vietnam Administration of HIV/AIDS Control, Hanoi, Vietnam
| | - V N Nguyen
- Vietnam National TB Program, Hanoi, Vietnam
| | - B H Nguyen
- Vietnam National TB Program, Hanoi, Vietnam; International Union Against Tuberculosis and Lung Diseases, Paris, France
| | - T V A Nguyen
- Vietnam National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - V Sintchenko
- Marie Bashir Institute for Infectious Diseases and Biosecurity (MBI), The University of Sydney, Sydney, Australia; NSW Mycobacterium Reference Laboratory, Centre for Infectious Disease and Microbiology - Public Health, ICPMR, Westmead Hospital, Sydney, Australia
| | - B J Marais
- Marie Bashir Institute for Infectious Diseases and Biosecurity (MBI), The University of Sydney, Sydney, Australia
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36
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Nguyen HL, Gándara F, Furukawa H, Doan TLH, Cordova KE, Yaghi OM. A Titanium-Organic Framework as an Exemplar of Combining the Chemistry of Metal- and Covalent-Organic Frameworks. J Am Chem Soc 2016; 138:4330-3. [PMID: 26998612 DOI: 10.1021/jacs.6b01233] [Citation(s) in RCA: 179] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A crystalline material with a two-dimensional structure, termed metal-organic framework-901 (MOF-901), was prepared using a strategy that combines the chemistry of MOFs and covalent-organic frameworks (COFs). This strategy involves in situ generation of an amine-functionalized titanium oxo cluster, Ti6O6(OCH3)6(AB)6 (AB = 4-aminobenzoate), which was linked with benzene-1,4-dialdehyde using imine condensation reactions, typical of COFs. The crystal structure of MOF-901 is composed of hexagonal porous layers that are likely stacked in staggered conformation (hxl topology). This MOF represents the first example of combining metal cluster chemistry with dynamic organic covalent bond formation to give a new crystalline, extended framework of titanium metal, which is rarely used in MOFs. The incorporation of Ti(IV) units made MOF-901 useful in the photocatalyzed polymerization of methyl methacrylate (MMA). The resulting polyMMA product was obtained with a high-number-average molar mass (26 850 g mol(-1)) and low polydispersity index (1.6), which in many respects are better than those achieved by the commercially available photocatalyst (P-25 TiO2). Additionally, the catalyst can be isolated, reused, and recycled with no loss in performance.
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Affiliation(s)
- Ha L Nguyen
- Department of Chemistry, University of California-Berkeley; Materials Sciences Division, Lawrence Berkeley National Laboratory; Kavli Energy NanoSciences Institute at Berkeley; and Berkeley Global Science Institute, Berkeley, California 94720, United States.,Vietnam National University-Ho Chi Minh City (VNU-HCM) , Ho Chi Minh City 721337, Vietnam
| | - Felipe Gándara
- Department of New Architectures in Materials Chemistry, Materials Science Institute of Madrid, Consejo Superior de Investigaciones Científicas , Madrid 28049, Spain
| | - Hiroyasu Furukawa
- Department of Chemistry, University of California-Berkeley; Materials Sciences Division, Lawrence Berkeley National Laboratory; Kavli Energy NanoSciences Institute at Berkeley; and Berkeley Global Science Institute, Berkeley, California 94720, United States.,King Fahd University of Petroleum and Minerals , Dhahran 34464, Saudi Arabia
| | - Tan L H Doan
- Faculty of Chemistry, University of Science, VNU-HCM , Ho Chi Minh City 721337, Vietnam
| | - Kyle E Cordova
- Department of Chemistry, University of California-Berkeley; Materials Sciences Division, Lawrence Berkeley National Laboratory; Kavli Energy NanoSciences Institute at Berkeley; and Berkeley Global Science Institute, Berkeley, California 94720, United States.,King Fahd University of Petroleum and Minerals , Dhahran 34464, Saudi Arabia
| | - Omar M Yaghi
- Department of Chemistry, University of California-Berkeley; Materials Sciences Division, Lawrence Berkeley National Laboratory; Kavli Energy NanoSciences Institute at Berkeley; and Berkeley Global Science Institute, Berkeley, California 94720, United States.,King Fahd University of Petroleum and Minerals , Dhahran 34464, Saudi Arabia
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38
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Trinh QM, Nguyen HL, Nguyen VN, Nguyen TVA, Sintchenko V, Marais BJ. Tuberculosis and HIV co-infection-focus on the Asia-Pacific region. Int J Infect Dis 2016; 32:170-8. [PMID: 25809776 DOI: 10.1016/j.ijid.2014.11.023] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 11/24/2014] [Indexed: 12/23/2022] Open
Abstract
Tuberculosis (TB) is the leading opportunistic disease and cause of death in patients with HIV infection. In 2013 there were 1.1 million new TB/HIV co-infected cases globally, accounting for 12% of incident TB cases and 360,000 deaths. The Asia-Pacific region, which contributes more than a half of all TB cases worldwide, traditionally reports low TB/HIV co-infection rates. However, routine testing of TB patients for HIV infection is not universally implemented and the estimated prevalence of HIV in new TB cases increased to 6.3% in 2013. Although HIV infection rates have not seen the rapid rise observed in Sub-Saharan Africa, indications are that rates are increasing among specific high-risk groups. This paper reviews the risks of TB exposure and progression to disease, including the risk of TB recurrence, in this vulnerable population. There is urgency to scale up interventions such as intensified TB case-finding, isoniazid preventive therapy, and TB infection control, as well as HIV testing and improved access to antiretroviral treatment. Increased awareness and concerted action is required to reduce TB/HIV co-infection rates in the Asia-Pacific region and to improve the outcomes of people living with HIV.
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Affiliation(s)
- Q M Trinh
- Marie Bashir Institute for Infectious Diseases and Biosecurity (MBI), The University of Sydney, Sydney, Australia; Centre for Infectious Disease and Microbiology - Public Health, ICPMR, Westmead Hospital, Sydney, Australia; Tuberculosis Laboratory, Vietnam National Institute of Hygiene and Epidemiology, Hanoi, Vietnam.
| | - H L Nguyen
- Vietnam Administration of HIV/AIDS Control, Hanoi, Vietnam
| | - V N Nguyen
- Vietnam National Lung Hospital, Hanoi, Vietnam
| | - T V A Nguyen
- Tuberculosis Laboratory, Vietnam National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - V Sintchenko
- Marie Bashir Institute for Infectious Diseases and Biosecurity (MBI), The University of Sydney, Sydney, Australia; Centre for Infectious Disease and Microbiology - Public Health, ICPMR, Westmead Hospital, Sydney, Australia
| | - B J Marais
- Marie Bashir Institute for Infectious Diseases and Biosecurity (MBI), The University of Sydney, Sydney, Australia
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Doan TLH, Nguyen HL, Pham HQ, Pham-Tran NN, Le TN, Cordova KE. Tailoring the Optical Absorption of Water-Stable ZrIV- and HfIV-Based Metal-Organic Framework Photocatalysts. Chem Asian J 2015; 10:2660-8. [DOI: 10.1002/asia.201500641] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2015] [Revised: 07/31/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Tan L. H. Doan
- Faculty of Chemistry; University of Science; Vietnam National University; Ho Chi Minh City 721337 Vietnam
- Center for Molecular and NanoArchitecture (MANAR); Vietnam National University; Ho Chi Minh City 721337 Vietnam
| | - Ha L. Nguyen
- Center for Molecular and NanoArchitecture (MANAR); Vietnam National University; Ho Chi Minh City 721337 Vietnam
| | - Hung Q. Pham
- Faculty of Chemistry; University of Science; Vietnam National University; Ho Chi Minh City 721337 Vietnam
- Center for Molecular and NanoArchitecture (MANAR); Vietnam National University; Ho Chi Minh City 721337 Vietnam
| | - Nguyen-Nguyen Pham-Tran
- Faculty of Chemistry; University of Science; Vietnam National University; Ho Chi Minh City 721337 Vietnam
| | - Thach N. Le
- Faculty of Chemistry; University of Science; Vietnam National University; Ho Chi Minh City 721337 Vietnam
| | - Kyle E. Cordova
- Center for Molecular and NanoArchitecture (MANAR); Vietnam National University; Ho Chi Minh City 721337 Vietnam
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40
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Hoang LTM, Ngo LH, Nguyen HL, Nguyen HTH, Nguyen CK, Nguyen BT, Ton QT, Nguyen HKD, Cordova KE, Truong T. An azobenzene-containing metal–organic framework as an efficient heterogeneous catalyst for direct amidation of benzoic acids: synthesis of bioactive compounds. Chem Commun (Camb) 2015; 51:17132-5. [DOI: 10.1039/c5cc05985b] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
An Zr-MOFs was demonstrated to be an efficient heterogeneous catalyst for direct amidation.
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Affiliation(s)
- Linh T. M. Hoang
- Faculty of Chemical Engineering
- HCMC University of Technology
- VNU-HCM
- Ho Chi Minh City
- Vietnam
| | - Long H. Ngo
- Center for Molecular and NanoArchitecture
- VNU-HCM
- Ho Chi Minh City
- Vietnam
| | - Ha L. Nguyen
- Center for Molecular and NanoArchitecture
- VNU-HCM
- Ho Chi Minh City
- Vietnam
| | - Hanh T. H. Nguyen
- Faculty of Chemical Engineering
- HCMC University of Technology
- VNU-HCM
- Ho Chi Minh City
- Vietnam
| | - Chung K. Nguyen
- Faculty of Chemical Engineering
- HCMC University of Technology
- VNU-HCM
- Ho Chi Minh City
- Vietnam
| | - Binh T. Nguyen
- Center for Molecular and NanoArchitecture
- VNU-HCM
- Ho Chi Minh City
- Vietnam
| | - Quang T. Ton
- Department of Chemistry
- HCMC University of Science
- VNU-HCM
- Ho Chi Minh City
- Vietnam
| | - Hong K. D. Nguyen
- School of Chemical Engineering
- Hanoi University of Science and Technology
- Hanoi
- Vietnam
| | - Kyle E. Cordova
- Center for Molecular and NanoArchitecture
- VNU-HCM
- Ho Chi Minh City
- Vietnam
| | - Thanh Truong
- Faculty of Chemical Engineering
- HCMC University of Technology
- VNU-HCM
- Ho Chi Minh City
- Vietnam
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41
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Mendola A, Schlögel MJ, Ghalamkarpour A, Irrthum A, Nguyen HL, Fastré E, Bygum A, van der Vleuten C, Fagerberg C, Baselga E, Quere I, Mulliken JB, Boon LM, Brouillard P, Vikkula M. Mutations in the VEGFR3 signaling pathway explain 36% of familial lymphedema. Mol Syndromol 2013; 4:257-66. [PMID: 24167460 DOI: 10.1159/000354097] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/06/2013] [Indexed: 12/13/2022] Open
Abstract
Lymphedema is caused by dysfunction of lymphatic vessels, leading to disabling swelling that occurs mostly on the extremities. Lymphedema can be either primary (congenital) or secondary (acquired). Familial primary lymphedema commonly segregates in an autosomal dominant or recessive manner. It can also occur in combination with other clinical features. Nine mutated genes have been identified in different isolated or syndromic forms of lymphedema. However, the prevalence of primary lymphedema that can be explained by these genetic alterations is unknown. In this study, we investigated 7 of these putative genes. We screened 78 index patients from families with inherited lymphedema for mutations in FLT4, GJC2, FOXC2, SOX18, GATA2, CCBE1, and PTPN14. Altogether, we discovered 28 mutations explaining 36% of the cases. Additionally, 149 patients with sporadic primary lymphedema were screened for FLT4, FOXC2, SOX18, CCBE1, and PTPN14. Twelve mutations were found that explain 8% of the cases. Still unidentified is the genetic cause of primary lymphedema in 64% of patients with a family history and 92% of sporadic cases. Identification of those genes is important for understanding of etiopathogenesis, stratification of treatments and generation of disease models. Interestingly, most of the proteins that are encoded by the genes mutated in primary lymphedema seem to act in a single functional pathway involving VEGFR3 signaling. This underscores the important role this pathway plays in lymphatic development and function and suggests that the unknown genes also have a role.
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42
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Nguyen HL, Charpentier C, Nguyen N, de Truchis P, Molina JM, Ruxrungtham K, Delaugerre C. Longitudinal analysis of integrase N155H variants in heavily treated patients failing raltegravir-based regimens. HIV Med 2012; 14:85-91. [PMID: 22994529 DOI: 10.1111/j.1468-1293.2012.01039.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/22/2012] [Indexed: 11/29/2022]
Abstract
OBJECTIVES The mechanism of raltegravir (RAL)-resistant evolutions has not already been elucidated. Because the emergence of RAL resistance is usually initiated by the N155H mutant, we assessed the role of minor N155H-mutated variants in circulating RNA and archived DNA in five heavily treated patients experiencing long-term RAL therapy failure and harbouring three different resistance profiles determined by standard genotyping. METHODS Allele-specific polymerase chain reaction (AS-PCR) was used to detect N155H mutants in longitudinal stored plasma and whole-blood samples before, during and after RAL-based regimens in five patients infected with the HIV-1 B subtype. RESULTS No minor N155H-mutated variant was found by AS-PCR in either plasma or whole-blood samples collected at baseline and after RAL withdrawal in any of the five patients. During RAL failure, the mutation N155H was detected at different levels in three patients displaying the N155H pathway and gradually declined when the double mutant Q148H+G140S was selected in one patient. In two patients with the Q148H resistance pathway, no N155H variant was identified by AS-PCR in either viral RNA or DNA. CONCLUSIONS The N155H mutation present at various levels from minority to majority showed no relationship with the three RAL-associated resistance profiles, suggesting that this mutant may not play a role in determining different resistance profiles. Moreover, pre-existing N155H is very infrequent and, if selected during RAL failure, the N155H mutant disappears quickly after RAL withdrawal.
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Affiliation(s)
- H L Nguyen
- Virology Department, Saint-Louis Hospital, Assistance Publique-Hôpitaux de Paris, INSERM U941, Paris Diderot University, Sorbonne Paris Cité, Paris, France
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43
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Taylor WR, Nguyen K, Nguyen D, Nguyen H, Horby P, Nguyen HL, Lien T, Tran G, Tran N, Nguyen HM, Nguyen T, Nguyen HH, Nguyen T, Tran G, Farrar J, de Jong M, Schultsz C, Tran H, Nguyen D, Vu B, Le H, Dao T, Nguyen T, Wertheim H. The spectrum of central nervous system infections in an adult referral hospital in Hanoi, Vietnam. PLoS One 2012; 7:e42099. [PMID: 22952590 PMCID: PMC3431395 DOI: 10.1371/journal.pone.0042099] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Accepted: 07/02/2012] [Indexed: 11/19/2022] Open
Abstract
Objectives To determine prospectively the causative pathogens of central nervous system (CNS) infections in patients admitted to a tertiary referral hospital in Hanoi, Vietnam. Methods From May 2007 to December 2008, cerebrospinal fluid (CSF) samples from 352 adults with suspected meningitis or encephalitis underwent routine testing, staining (Gram, Ziehl-Nielsen, India ink), bacterial culture and polymerase chain reaction targeting Neisseria meningitidis, Streptococcus pneumoniae, S. suis, Haemophilus influenzae type b, Herpes simplex virus (HSV), Varicella Zoster virus (VZV), enterovirus, and 16S ribosomal RNA. Blood cultures and clinically indicated radiology were also performed. Patients were classified as having confirmed or suspected bacterial (BM), tuberculous (TBM), cryptococcal (CRM), eosinophilic (EOM) meningitis, aseptic encephalitis/meningitis (AEM), neurocysticercosis and others. Results 352 (male: 66%) patients were recruited: median age 34 years (range 13–85). 95/352 (27.3%) diagnoses were laboratory confirmed and one by cranial radiology: BM (n = 62), TBM (n = 9), AEM (n = 19), CRM (n = 5), and neurocysticercosis (n = 1, cranial radiology). S. suis predominated as the cause of BM [48/62 (77.4%)]; Listeria monocytogenese (n = 1), S. pasteurianus (n = 1) and N. meningitidis (n = 2) were infrequent. AEM viruses were: HSV (n = 12), VZV (n = 5) and enterovirus (n = 2). 5 patients had EOM. Of 262/352 (74.4%) patients with full clinical data, 209 (79.8%) were hospital referrals and 186 (71%) had been on antimicrobials. 21 (8%) patients died: TBM (15.2%), AEM (10%), and BM (2.8%). Conclusions Most infections lacked microbiological confirmation. S. suis was the most common cause of BM in this setting. Improved diagnostics are needed for meningoencephalitic syndromes to inform treatment and prevention strategies.
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Nguyen HL, Leermakers M, Kurunczi S, Bozo L, Baeyens W. Mercury distribution and speciation in Lake Balaton, Hungary. Sci Total Environ 2005; 340:231-246. [PMID: 15752504 DOI: 10.1016/j.scitotenv.2004.08.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2003] [Revised: 08/19/2004] [Accepted: 08/19/2004] [Indexed: 05/24/2023]
Abstract
The distribution and speciation of mercury in air, rain, lake water, sediment, and zooplankton in Lake Balaton (Hungary) were investigated between 1999 and 2002. In air, total gaseous mercury (TGM) ranged from 0.4 to 5.9 ng m(-3) and particulate phase mercury (PPM) from 0.01 to 0.39 ng m(-3). Higher concentrations of both TGM and PPM occurred during daytime. Higher concentrations of PPM occurred in winter. In rain and snow, total mercury ranged from 10.8 to 36.7 ng L(-1) in summer but levels up to 191 ng L(-1) in winter. Monomethylmercury (MMHg) concentrations ranged from 0.09 to 1.26 ng L(-1) and showed no seasonal variations. Total Hg in the unfiltered lake water varied spatially, with concentrations ranging from 1.4 to 6.5 ng L(-1). Approximately 70% of the total Hg is dissolved. MMHg levels ranged from 0.08 to 0.44 ng L(-1) as total and from 0.05 to 0.37 ng L(-1) in the dissolved form. Lower Hg concentrations in the water column occurred in winter. In suspended particulate matter and in sediment, total mercury ranged from 9 to 160 ng g(-1) dw, and MMHg ranged from 0.07 to 0.84 ng g(-1) dw. In zooplankton, an average mercury level of 31.0+/-6.8 ng g(-1) dw occurred, with MMHg accounting for approximately 17%. In sediments, suspended-matter- and zooplankton-high Hg and MMHg levels occurred at the mouth of the River Zala, but, in the lake, higher concentrations occurred on the Northern side, and an increasing trend from north-west to north-east was observed. In general, regarding Hg, Lake Balaton can be considered as a relatively uncontaminated site. The high-pH and well-oxygenated water as well as the low organic matter content of the sediment does not favour the methylation of Hg. In addition, bioconcentration and bioaccumulation factors are relatively low compared to other aquatic systems.
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Affiliation(s)
- H L Nguyen
- Laboratory of Analytical and Environmental Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
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45
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Nguyen HL, Leermakers M, Osán J, Török S, Baeyens W. Heavy metals in Lake Balaton: water column, suspended matter, sediment and biota. Sci Total Environ 2005; 340:213-30. [PMID: 15752503 DOI: 10.1016/j.scitotenv.2004.07.032] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2003] [Revised: 01/05/2004] [Accepted: 07/26/2004] [Indexed: 05/14/2023]
Abstract
During the period 1999-2002, five sampling cruises have been carried out on Lake Balaton to assess trace metal distribution in the lake and to identify major sources. Eighteen elements, including Cr, Co, Ni, Cu, Zn, Cd, Pb (trace metals) and Al, Ba, Ca, Fe, K, Mg, Mn, Na, P, S, Sr (major metals), were determined in one or more of the lake's compartments. Lower trace metal concentrations in rainwater were observed in June and February 2000, while much higher levels were present in September 2001 (during a storm event) and in snow (February 2000). In the Northern and Western parts of the lake, especially at the inflow of river Zala and the locations of the yacht harbours, metal concentrations were higher in almost all compartments. Because the lake is very shallow, storm conditions also change significantly the metal distributions in the dissolved and particulate phases. The Kis-Balaton protection system located on Zala river functions very efficiently for retaining suspended particulate matter (SPM; 72% retention) and associated metals. Metal concentrations in surface sediments of the lake showed a high variability. After normalisation for the fine sediment fraction, only a few stations including Zala mouth appeared to be enriched in trace metals. In zooplankton, Zn seemed to be much more elevated compared to the other trace metals. Based on the molar ratios of the trace metals in the various compartments and input flows of the lake, several trends could be deduced. For example, molar ratios of the trace metals in the dissolved and solid (suspended particulate matter and sediments) phases in the lake are fairly similar to those in Zala River.
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Affiliation(s)
- H L Nguyen
- Laboratory of Analytical and Environmental Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium
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46
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Hoang TQ, Nguyen HL, Tran NT, Homasson JP. [Evaluation of different fibroscopic sampling techniques for the diagnosis of isolated peripheral pulmonary nodules. A prospective study of 74 cases in Vietnam]. Rev Pneumol Clin 2004; 60:265-268. [PMID: 15687909 DOI: 10.1016/s0761-8417(04)72111-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Isolated pulmonary nodules raise serious diagnostic problems. Combined imaging and endoscopic methods can often avoid exploratory thoracotomy. The situation is different however in developing countries where health facilities and technical availability are quite variable. Bronchial fibroscopy without image guidance can provide the diagnosis is an acceptable number of cases. We conducted a prospective study in 74 patients. After chest x-ray and CT scan of the lesion of interest, bronchial lavage was performed in each patient with brushings samples in 71 and transbronchial biopsy in 68. Riu staining was performed immediately in the endoscopy suite, providing an almost immediate diagnostic approach. The combination of lavage, brushing and biopsy provided a diagnostic yield as good as the brushings and biopsy combination. These endoscopic techniques gave the diagnosis of the specific lesion in 52 cases (70%). Most involved cancer but there were 15 cases of tuberculosis diagnosis, which remains frequent in developing countries.
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Affiliation(s)
- T Q Hoang
- Service de Santé, Hôpital Pham Ngoc Thach, Hô Chi Minh-Ville, Viêt-nam
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47
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Leermakers M, Nguyen HL, Kurunczi S, Vanneste B, Galletti S, Baeyens W. Determination of methylmercury in environmental samples using static headspace gas chromatography and atomic fluorescence detection after aqueous phase ethylation. Anal Bioanal Chem 2003; 377:327-33. [PMID: 12898107 DOI: 10.1007/s00216-003-2116-6] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2003] [Revised: 05/30/2003] [Accepted: 06/12/2003] [Indexed: 11/29/2022]
Abstract
A rapid and automated method for the determination of monomethylmercury (MMHg) in environmental samples was developed using headspace gas chromatography with atomic fluorescence detection in combination with aqueous phase ethylation. Sample preparation steps were optimized for sediments, biological samples, and water samples using certified reference materials and real samples with a broad range of MMHg concentrations. Different extraction procedures were compared for both sediments and biological samples. The methods were applied in the intercomparison exercises for the certification of MMHg in sediments (IAEA 405) and in Oyster tissue (BCR 710) and the results were accepted for certification. The detection limits for MMHg are 0.002 ng Hg/g for sediments and biological samples and 0.01 ng Hg/L for water samples. The method was tested for methylation artifacts; no artifact was observed in the sediment samples and CRMs tested.
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Affiliation(s)
- M Leermakers
- Laboratory of Analytical and Environmental Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium.
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Abstract
The incidence of cutaneous malignant melanoma (CMM) has been rising in fair-skinned populations throughout the world for decades. The upward trend may, however, finally be slowing in some of these populations. Recent (1983-1996) CMM incidence trends for a high incidence area (New South Wales, Australia) have been examined according to gender, age group, body site and tumour thickness. Despite continuing upward trends in older age groups, particularly among men (e.g., 7.20% increase per year in men aged 75+), incidence for younger ages is stabilizing (in men) or declining (in women): average annual percentage changes of -3.03 and -0.88 were observed for women aged 15-34 and 35-54, respectively. Patterns suggest a birth-cohort effect, with those born since 1945 or 1950 having lower (females) or similar (males) rates to those born earlier. For each gender, all-ages incidence rose by a similar amount for each of the main body sites except the leg in women, where incidence fell by 0.49% per year. In men, the incidence of both thin (</=75 mm) and thick (>75 mm) melanomas increased (significantly, by 2.63% per year and non-significantly, by 0.93% per year, respectively) between 1989 and 1996. In women, incidence remained stable for both thickness subgroups. These data are consistent with a stabilization or reduction in either total sun exposure or intermittency of exposure among New South Wales cohorts born since about 1950. Because incidence rates are still much higher than they were a few decades ago, however, efforts to reduce sun exposure, particularly in children and youth, must continue.
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Affiliation(s)
- L D Marrett
- Division of Preventive Oncology, Cancer Care Ontario, Toronto, Ontario, Canada
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Nguyen HL, Gruber D, Bulinski JC. Microtubule-associated protein 4 (MAP4) regulates assembly, protomer-polymer partitioning and synthesis of tubulin in cultured cells. J Cell Sci 1999; 112 ( Pt 12):1813-24. [PMID: 10341201 DOI: 10.1242/jcs.112.12.1813] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We depleted MAP4, a ubiquitously expressed microtubule (MT)-associated protein previously shown to be capable of stabilizing MTs, from HeLa cells by stably expressing antisense RNA. These HeLa-AS cells, in which the MAP4 level was decreased to 33% of the wild-type level, displayed decreased content of total tubulin (65% of the wild-type level). The partitioning of cellular tubulin into protomer and polymer was altered in HeLa-AS cells: polymeric tubulin was decreased to 46% of the level in control cells, while protomeric tubulin was increased to 226% of the level in control cells. Tubulin protein synthesis was decreased, consistent with the tubulin autoregulation model, which proposes that tubulin protomer inhibits its own synthesis. Following release from drug-induced depolymerization, MTs in HeLa-AS cells reformed more slowly, and showed an increased focus on the centrosome, as compared to control cells. HeLa-AS cells also appeared to be less bipolar in shape and flatter than control cells. Our data suggest that MAP4 regulates assembly level of MTs and, perhaps through this mechanism, is involved in controlling spreading and shape of cells.
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Affiliation(s)
- H L Nguyen
- Departments of Pathology and Anatomy and Cell Biology, Columbia University, College of Physicians and Surgeons, BB1213-630 W. 168th St, New York, NY 10032-3702, USA.
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Nguyen HL, Gruber D, McGraw T, Sheetz MP, Bulinski JC. Stabilization and functional modulation of microtubules by microtubule-associated protein 4. Biol Bull 1998; 194:354-357. [PMID: 9664661 DOI: 10.2307/1543111] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Affiliation(s)
- H L Nguyen
- Department of Anatomy, Columbia University, College of Physicians and Surgeons, New York, New York 10032, USA
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