101
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Mallick A, El-Zohry AM, Shekhah O, Yin J, Jia J, Aggarwal H, Emwas AH, Mohammed OF, Eddaoudi M. Unprecedented Ultralow Detection Limit of Amines using a Thiadiazole-Functionalized Zr(IV)-Based Metal–Organic Framework. J Am Chem Soc 2019; 141:7245-7249. [DOI: 10.1021/jacs.9b01839] [Citation(s) in RCA: 155] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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102
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Alahmari F, Davaasuren B, Emwas AH, M.F.J. Costa P, Rothenberger A. Tris(ethylenediamine)nickel(II) thio-hydroxogermanate monohydrate: Synthesis, crystal structure, 1H NMR, EPR, optical and magnetic properties. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.01.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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103
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Alahmari F, Dey S, Emwas AH, Davaasuren B, Rothenberger A. Ultra-low thermal conductivity in Na/Sb chalcobismuthates: synthesis, crystal structures, optical properties and 23Na NMR spectroscopy. NEW J CHEM 2019. [DOI: 10.1039/c9nj01440c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The synthesis and characterization of mixed metal phases, Na2BiSbQ4(Q = S, Se, Te), containing only one metal site in the unit cell, which resulted in extremely low thermal conductivities.
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Affiliation(s)
- Fatimah Alahmari
- Department of Nanomedicine
- Institute for Research and Medical Consultations (IRMC)
- Imam Abdulrahman Bin Faisal University
- Dammam 31441
- Kingdom of Saudi Arabia
| | - Somnath Dey
- Core Labs
- King Abdullah University of Science and Technology (KAUST)
- Thuwal 23955-6900
- Kingdom of Saudi Arabia
| | - Abdul-Hamid Emwas
- Core Labs
- King Abdullah University of Science and Technology (KAUST)
- Thuwal 23955-6900
- Kingdom of Saudi Arabia
| | - Bambar Davaasuren
- Institute for Energy and Climate Research, Materials Synthesis and Processing (IEK-1)
- 52425 Jülich
- Germany
| | - Alexander Rothenberger
- Division of Physical Sciences and Engineering
- King Abdullah University of Science and Technology (KAUST)
- Thuwal 23955-6900
- Kingdom of Saudi Arabia
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104
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Gallo A, Farinha ASF, Dinis M, Emwas AH, Santana A, Nielsen RJ, Goddard WA, Mishra H. The chemical reactions in electrosprays of water do not always correspond to those at the pristine air-water interface. Chem Sci 2018; 10:2566-2577. [PMID: 30996971 PMCID: PMC6422012 DOI: 10.1039/c8sc05538f] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 12/21/2018] [Indexed: 12/11/2022] Open
Abstract
The recent application of electrosprays to characterize the air-water interface, along with the reports on dramatically accelerated chemical reactions in aqueous electrosprays, have sparked a broad interest. Herein, we report on complementary laboratory and in silico experiments tracking the oligomerization of isoprene, an important biogenic gas, in electrosprays and isoprene-water emulsions to differentiate the contributions of interfacial effects from those of high voltages leading to charge-separation and concentration of reactants in the electrosprays. To this end, we employed electrospray ionization mass spectrometry, proton nuclear magnetic resonance, ab initio calculations and molecular dynamics simulations. We found that the oligomerization of isoprene in aqueous electrosprays involved minimally hydrated and highly reactive hydronium ions. Those conditions, however, are non-existent at pristine air-water interfaces and oil-water emulsions under normal temperature and pressure. Thus, electrosprays should be complemented with surface-specific platforms and theoretical methods to reliably investigate chemistries at the pristine air-water interface.
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Affiliation(s)
- Adair Gallo
- King Abdullah University of Science and Technology (KAUST) , Saudi Arabia . .,Water Desalination and Reuse Center (WDRC) , Saudi Arabia.,Division of Biological and Environmental Sciences (BESE) , Saudi Arabia
| | - Andreia S F Farinha
- King Abdullah University of Science and Technology (KAUST) , Saudi Arabia . .,Water Desalination and Reuse Center (WDRC) , Saudi Arabia.,Division of Biological and Environmental Sciences (BESE) , Saudi Arabia
| | - Miguel Dinis
- King Abdullah University of Science and Technology (KAUST) , Saudi Arabia . .,KAUST Catalysis Center (KCC) , Saudi Arabia
| | - Abdul-Hamid Emwas
- King Abdullah University of Science and Technology (KAUST) , Saudi Arabia . .,Imaging and Characterization Core Laboratory , Thuwal 23955-6900 , Saudi Arabia
| | - Adriano Santana
- King Abdullah University of Science and Technology (KAUST) , Saudi Arabia . .,Water Desalination and Reuse Center (WDRC) , Saudi Arabia.,Division of Biological and Environmental Sciences (BESE) , Saudi Arabia
| | - Robert J Nielsen
- Materials and Process Simulation Center , California Institute of Technology , Pasadena , CA 91125 , USA
| | - William A Goddard
- Materials and Process Simulation Center , California Institute of Technology , Pasadena , CA 91125 , USA
| | - Himanshu Mishra
- King Abdullah University of Science and Technology (KAUST) , Saudi Arabia . .,Water Desalination and Reuse Center (WDRC) , Saudi Arabia.,Division of Biological and Environmental Sciences (BESE) , Saudi Arabia
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105
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Chen Z, Feng L, Liu L, Bhatt PM, Adil K, Emwas AH, Assen AH, Belmabkhout Y, Han Y, Eddaoudi M. Enhanced Separation of Butane Isomers via Defect Control in a Fumarate/Zirconium-Based Metal Organic Framework. Langmuir 2018; 34:14546-14551. [PMID: 30403872 DOI: 10.1021/acs.langmuir.8b03085] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The discovery of appropriate synthetic reaction conditions for fabricating a stable zirconium-based molecular sieve (Zr-fum-fcu-MOF) with minimal defects and its utilization in the challenging separation of linear paraffins from branched paraffins is reported. The crystallinity and structural defects were modulated and adjusted at the molecular level by controlling the synthetic reaction conditions (i.e., amounts of modulators and ligands). The impact of molecular defects on the separation of n-butane from iso-butane was studied through the preparation, fine characterization, and performance evaluation of Zr-fum-fcu-MOFs with varying degrees of defects. Defect-rich Zr-fum-fcu-MOFs were found to have poor n-butane/iso-butane separation, mainly driven by thermodynamics, while Zr-fum-fcu-MOFs with fewer or minimal defects showed efficient separation, driven mainly by kinetics and full molecular exclusion mechanisms. The impact of intrinsic defects (i.e., missing organic or inorganic blocks) on the associated mechanisms involved in the separation of n-butane/iso-butane was evidenced through single-gas adsorption, mixed-gas column breakthrough experiments, and calorimetric studies. This investigation demonstrates, for the first time, the importance of controlling intrinsic defects to maintain the selective exclusion behavior of hydrocarbon isomers when using molecular sieves.
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106
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Ali M, Shaw DR, Zhang L, Haroon MF, Narita Y, Emwas AH, Saikaly PE, Okabe S. Aggregation ability of three phylogenetically distant anammox bacterial species. Water Res 2018; 143:10-18. [PMID: 29933181 DOI: 10.1016/j.watres.2018.06.007] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 04/30/2018] [Accepted: 06/04/2018] [Indexed: 06/08/2023]
Abstract
Anaerobic ammonium-oxidizing (anammox) bacteria are well known for their aggregation ability. However, very little is known about cell surface physicochemical properties of anammox bacteria and thus their aggregation abilities have not been quantitatively evaluated yet. Here, we investigated the aggregation abilities of three different anammox bacterial species: "Candidatus Brocadia sinica", "Ca. Jettenia caeni" and "Ca. Brocadia sapporoensis". Planktonic free-living enrichment cultures of these three anammox species were harvested from the membrane bioreactors (MBRs). The physicochemical properties (e.g., contact angle, zeta potential, and surface thermodynamics) were analyzed for these anammox bacterial species and used in the extended DLVO theory to understand the force-distance relationship. In addition, their extracellular polymeric substances (EPSs) were characterized by X-ray photoelectron spectroscopy and nuclear magnetic resonance. The results revealed that the "Ca. B. sinica" cells have the most hydrophobic surface and less hydrophilic functional groups in EPS than other anammox strains, suggesting better aggregation capability. Furthermore, aggregate formation and anammox bacterial populations were monitored when planktonic free-living cells were cultured in up-flow column reactors under the same conditions. Rapid development of microbial aggregates was observed with the anammox bacterial population shifts to a dominance of "Ca. B. sinica" in all three reactors. The dominance of "Ca. B. sinica" could be explained by its better aggregation ability and the superior growth kinetic properties (higher growth rate and affinity to nitrite). The superior aggregation ability of "Ca. B. sinica" indicates significant advantages (efficient and rapid start-up of anammox reactors due to better biomass retention as granules and consequently stable performance) in wastewater treatment application.
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Affiliation(s)
- Muhammad Ali
- King Abdullah University of Science and Technology, Biological and Environmental Sciences and Engineering Division, Water Desalination and Reuse Center, Thuwal, 23955-6900, Saudi Arabia; Division of Environmental Engineering, Faculty of Engineering, Hokkaido University, North 13, West-8, Sapporo, Hokkaido, 060-8628, Japan
| | - Dario Rangel Shaw
- King Abdullah University of Science and Technology, Biological and Environmental Sciences and Engineering Division, Water Desalination and Reuse Center, Thuwal, 23955-6900, Saudi Arabia
| | - Lei Zhang
- Division of Environmental Engineering, Faculty of Engineering, Hokkaido University, North 13, West-8, Sapporo, Hokkaido, 060-8628, Japan
| | - Mohamed Fauzi Haroon
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA, 02138, USA
| | - Yuko Narita
- Division of Environmental Engineering, Faculty of Engineering, Hokkaido University, North 13, West-8, Sapporo, Hokkaido, 060-8628, Japan
| | - Abdul-Hamid Emwas
- King Abdullah University of Science and Technology, Core Labs, Thuwal, 23955-6900, Saudi Arabia
| | - Pascal E Saikaly
- King Abdullah University of Science and Technology, Biological and Environmental Sciences and Engineering Division, Water Desalination and Reuse Center, Thuwal, 23955-6900, Saudi Arabia.
| | - Satoshi Okabe
- Division of Environmental Engineering, Faculty of Engineering, Hokkaido University, North 13, West-8, Sapporo, Hokkaido, 060-8628, Japan.
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107
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Shinde DB, Sheng G, Li X, Ostwal M, Emwas AH, Huang KW, Lai Z. Crystalline 2D Covalent Organic Framework Membranes for High-Flux Organic Solvent Nanofiltration. J Am Chem Soc 2018; 140:14342-14349. [DOI: 10.1021/jacs.8b08788] [Citation(s) in RCA: 216] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Digambar B. Shinde
- Advanced Membranes and Porous Materials Center, Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Guan Sheng
- Advanced Membranes and Porous Materials Center, Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Xiang Li
- Advanced Membranes and Porous Materials Center, Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Mayur Ostwal
- Advanced Membranes and Porous Materials Center, Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Abdul-Hamid Emwas
- Core Laboratories, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Kuo-Wei Huang
- Catalysis Center, Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Zhiping Lai
- Advanced Membranes and Porous Materials Center, Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
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108
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O'Rourke A, Kremb S, Duggan BM, Sioud S, Kharbatia N, Raji M, Emwas AH, Gerwick WH, Voolstra CR. Identification of a 3-Alkylpyridinium Compound from the Red Sea Sponge Amphimedon chloros with In Vitro Inhibitory Activity against the West Nile Virus NS3 Protease. Molecules 2018; 23:E1472. [PMID: 29912151 PMCID: PMC6099703 DOI: 10.3390/molecules23061472] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 06/12/2018] [Accepted: 06/15/2018] [Indexed: 12/19/2022] Open
Abstract
Viruses are underrepresented as targets in pharmacological screening efforts, given the difficulties of devising suitable cell-based and biochemical assays. In this study we found that a pre-fractionated organic extract of the Red Sea sponge Amphimedon chloros was able to inhibit the West Nile Virus NS3 protease (WNV NS3). Using liquid chromatography⁻mass spectrometry (LC-MS) and nuclear magnetic resonance (NMR) spectroscopy, the identity of the bioactive compound was determined as a 3-alkylpyridinium with m/z = 190.16. Diffusion Ordered Spectroscopy (DOSY) NMR and NMR relaxation rate analysis suggest that the bioactive compound forms oligomers of up to 35 kDa. We observed that at 9.4 μg/mL there was up to 40⁻70% inhibitory activity on WNV NS3 protease in orthogonal biochemical assays for solid phase extracts (SPE) of A. chloros. However, the LC-MS purified fragment was effective at inhibiting the protease up to 95% at an approximate amount of 2 µg/mL with negligible cytotoxicity to HeLa cells based on a High-Content Screening (HCS) cytological profiling strategy. To date, 3-alkylpyridinium type natural products have not been reported to show antiviral activity since the first characterization of halitoxin, or 3-alkylpyridinium, in 1978. This study provides the first account of a 3-alkylpyridinium complex that exhibits a proposed antiviral activity by inhibiting the NS3 protease. We suggest that the here-described compound can be further modified to increase its stability and tested in a cell-based assay to explore its full potential as a potential novel antiviral capable of inhibiting WNV replication.
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Affiliation(s)
- Aubrie O'Rourke
- Red Sea Research Center, Division of Biological and Environmental Science and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| | - Stephan Kremb
- Red Sea Research Center, Division of Biological and Environmental Science and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| | - Brendan M Duggan
- Scripps Institution of Oceanography and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.
| | - Salim Sioud
- King Abdullah University of Science and Technology (KAUST), Core Labs, Thuwal 23955-6900, Saudi Arabia.
| | - Najeh Kharbatia
- King Abdullah University of Science and Technology (KAUST), Core Labs, Thuwal 23955-6900, Saudi Arabia.
| | - Misjudeen Raji
- King Abdullah University of Science and Technology (KAUST), Core Labs, Thuwal 23955-6900, Saudi Arabia.
| | - Abdul-Hamid Emwas
- King Abdullah University of Science and Technology (KAUST), Core Labs, Thuwal 23955-6900, Saudi Arabia.
| | - William H Gerwick
- Scripps Institution of Oceanography and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.
| | - Christian R Voolstra
- Red Sea Research Center, Division of Biological and Environmental Science and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
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109
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Omar H, Moosa B, Alamoudi K, Anjum DH, Emwas AH, El Tall O, Vu B, Tamanoi F, AlMalik A, Khashab NM. Impact of Pore-Walls Ligand Assembly on the Biodegradation of Mesoporous Organosilica Nanoparticles for Controlled Drug Delivery. ACS Omega 2018; 3:5195-5201. [PMID: 31458733 PMCID: PMC6641955 DOI: 10.1021/acsomega.8b00418] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 04/19/2018] [Indexed: 05/20/2023]
Abstract
Porous materials with molecular-scale ordering have attracted major attention mainly because of the possibility to engineer their pores for selective applications. Periodic mesoporous organosilica is a class of hybrid materials where self-assembly of the organic linkers provides a crystal-like pore wall. However, unlike metal coordination, specific geometries cannot be predicted because of the competitive and dynamic nature of noncovalent interactions. Herein, we study the influence of competing noncovalent interactions in the pore walls on the biodegradation of organosilica frameworks for drug delivery application. These results support the importance of studying self-assembly patterns in hybrid frameworks to better engineer the next generation of dynamic or "soft" porous materials.
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Affiliation(s)
- Haneen Omar
- Smart
Hybrid Materials Laboratory, Advanced Membranes, and Porous Materials
Center, King Abdullah University of Science
and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Basem Moosa
- Smart
Hybrid Materials Laboratory, Advanced Membranes, and Porous Materials
Center, King Abdullah University of Science
and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Kholod Alamoudi
- Smart
Hybrid Materials Laboratory, Advanced Membranes, and Porous Materials
Center, King Abdullah University of Science
and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Dalaver H. Anjum
- King
Abdullah University of Science and Technology (KAUST), Core Labs, Thuwal 23955-6900, Saudi Arabia
| | - Abdul-Hamid Emwas
- King
Abdullah University of Science and Technology (KAUST), Core Labs, Thuwal 23955-6900, Saudi Arabia
| | - Omar El Tall
- King
Abdullah University of Science and Technology (KAUST), Core Labs, Thuwal 23955-6900, Saudi Arabia
| | - Binh Vu
- Department
of Microbiology, Immunology and Molecular Genetics, Jonsson Comprehensive
Cancer Center, Molecular Biology Institute, University of California, Los
Angeles, California 90095-1489, United States
| | - Fuyu Tamanoi
- Department
of Microbiology, Immunology and Molecular Genetics, Jonsson Comprehensive
Cancer Center, Molecular Biology Institute, University of California, Los
Angeles, California 90095-1489, United States
| | - Abdulaziz AlMalik
- Life
Sciences and Environment Research Institute, Center of Excellence
in Nanomedicine (CENM), King Abdulaziz City
for Science and Technology (KACST), Riyadh 11461, Saudi Arabia
- E-mail: (A.A.)
| | - Niveen M. Khashab
- Smart
Hybrid Materials Laboratory, Advanced Membranes, and Porous Materials
Center, King Abdullah University of Science
and Technology, Thuwal 23955-6900, Saudi Arabia
- E-mail: (N.M.K.)
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110
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Chotana G, Asghar S, Shahzadi T, Alazmi M, Gao X, Emwas AH, Saleem R, Batool F. Iridium-Catalyzed Regioselective Borylation of Substituted Biaryls. SYNTHESIS-STUTTGART 2018. [DOI: 10.1055/s-0036-1591968] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Biarylboronic esters are generally prepared by directed ortho-metalation or by Miyaura borylation and hence rely on the presence of a directing group or pre-functionalization. In this paper, the preparation of biarylboronic esters by direct C–H borylation of biaryl substrates is reported. Sterically governed regioselectivities were observed in the borylation of appropriately substituted biaryls by using [Ir(OMe)(COD)]2 precatalyst and di-tert-butylbipyridyl ligand. The resulting biarylboronic esters were isolated in 38–98% yields. The synthesized biarylboronic esters were further successfully employed in C–O, C–Br, and C–C coupling reactions.
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Affiliation(s)
- Ghayoor Chotana
- Department of Chemistry & Chemical Engineering, Syed Babar Ali School of Science & Engineering, Lahore University of Management Sciences
| | - Soneela Asghar
- Department of Chemistry & Chemical Engineering, Syed Babar Ali School of Science & Engineering, Lahore University of Management Sciences
| | - Tayyaba Shahzadi
- Department of Chemistry & Chemical Engineering, Syed Babar Ali School of Science & Engineering, Lahore University of Management Sciences
| | - Meshari Alazmi
- King Abdullah University of Science and Technology (KAUST), Computational Bioscience Research Center (CBRC), Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
| | - Xin Gao
- King Abdullah University of Science and Technology (KAUST), Computational Bioscience Research Center (CBRC), Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
| | | | - Rahman Saleem
- Department of Chemistry & Chemical Engineering, Syed Babar Ali School of Science & Engineering, Lahore University of Management Sciences
| | - Farhat Batool
- Department of Chemistry & Chemical Engineering, Syed Babar Ali School of Science & Engineering, Lahore University of Management Sciences
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111
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Alahmari F, Davaasuren B, Emwas AH, Rothenberger A. Thioaluminogermanate M(AlS2)(GeS2)4 (M = Na, Ag, Cu): Synthesis, Crystal Structures, Characterization, Ion-Exchange and Solid-State 27Al and 23Na NMR Spectroscopy. Inorg Chem 2018. [DOI: 10.1021/acs.inorgchem.7b02980] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fatimah Alahmari
- Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman bin Faisal University, Dammam 31441, Kingdom of Saudi Arabia
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112
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Emwas AH, Saccenti E, Gao X, McKay RT, dos Santos VAPM, Roy R, Wishart DS. Recommended strategies for spectral processing and post-processing of 1D 1H-NMR data of biofluids with a particular focus on urine. Metabolomics 2018; 14:31. [PMID: 29479299 PMCID: PMC5809546 DOI: 10.1007/s11306-018-1321-4] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Accepted: 01/09/2018] [Indexed: 12/11/2022]
Abstract
1H NMR spectra from urine can yield information-rich data sets that offer important insights into many biological and biochemical phenomena. However, the quality and utility of these insights can be profoundly affected by how the NMR spectra are processed and interpreted. For instance, if the NMR spectra are incorrectly referenced or inconsistently aligned, the identification of many compounds will be incorrect. If the NMR spectra are mis-phased or if the baseline correction is flawed, the estimated concentrations of many compounds will be systematically biased. Furthermore, because NMR permits the measurement of concentrations spanning up to five orders of magnitude, several problems can arise with data analysis. For instance, signals originating from the most abundant metabolites may prove to be the least biologically relevant while signals arising from the least abundant metabolites may prove to be the most important but hardest to accurately and precisely measure. As a result, a number of data processing techniques such as scaling, transformation and normalization are often required to address these issues. Therefore, proper processing of NMR data is a critical step to correctly extract useful information in any NMR-based metabolomic study. In this review we highlight the significance, advantages and disadvantages of different NMR spectral processing steps that are common to most NMR-based metabolomic studies of urine. These include: chemical shift referencing, phase and baseline correction, spectral alignment, spectral binning, scaling and normalization. We also provide a set of recommendations for best practices regarding spectral and data processing for NMR-based metabolomic studies of biofluids, with a particular focus on urine.
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Affiliation(s)
- Abdul-Hamid Emwas
- Imaging and Characterization Core Lab, KAUST, Thuwal, 23955-6900 Kingdom of Saudi Arabia
| | - Edoardo Saccenti
- Laboratory of Systems and Synthetic Biology, Wageningen University and Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Xin Gao
- Computer, Electrical and Mathematical Sciences and Engineering Division, Computational Bioscience Research Center, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955 Kingdom of Saudi Arabia
| | - Ryan T. McKay
- Department of Chemistry, University of Alberta, Edmonton, Canada
| | - Vitor A. P. Martins dos Santos
- Laboratory of Systems and Synthetic Biology, Wageningen University and Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Raja Roy
- Centre of Biomedical Research, Formerly, Centre of Biomedical Magnetic Resonance, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Lucknow, India
| | - David S. Wishart
- Department of Biological Sciences, University of Alberta, Edmonton, Canada
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113
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Dey R, Samantaray MK, Poater A, Hamieh A, Kavitake S, Abou-Hamad E, Callens E, Emwas AH, Cavallo L, Basset JM. Synthesis and characterization of a homogeneous and silica supported homoleptic cationic tungsten(vi) methyl complex: application in olefin metathesis. Chem Commun (Camb) 2018; 52:11270-11273. [PMID: 27709169 DOI: 10.1039/c6cc05352a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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 method for the synthesis of a homogeneous cationic tungsten(vi)pentamethyl complex [(WMe5)+(C6F5)3BMe-] from neutral tungstenhexamethyl (WMe6) and a silica supported cationic tungstentetramethyl complex [([triple bond, length as m-dash]Si-O-)WMe4+ (C6F5)3BMe-] from a neutral silica supported tungstenpentamethyl complex [([triple bond, length as m-dash]Si-O-)WMe5] is described. In both cases a direct demethylation using the B(C6F5)3 reagent was used. The aforesaid complexes were characterized by liquid or solid state NMR spectroscopy. Interestingly, the homogeneous cationic complex [(WMe5)+(C6F5)3BMe-] shows moderate activity whereas the supported cationic complex [([triple bond, length as m-dash]Si-O-)WMe4+(C6F5)3BMe-] exhibits good activity in olefin metathesis reactions.
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Affiliation(s)
- Raju Dey
- King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia.
| | - Manoja K Samantaray
- King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia.
| | - Albert Poater
- King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia. and Institut de Quìmica Computacional i Catàlisi and Departament de Quìmica, Universitat de Girona, Campus de Montilivi, 17003 Girona, Catalonia, Spain
| | - Ali Hamieh
- King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia.
| | - Santosh Kavitake
- King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia.
| | - Edy Abou-Hamad
- King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia.
| | - Emmanuel Callens
- King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia.
| | - Abdul-Hamid Emwas
- Imaging and Characterization Core Lab, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Luigi Cavallo
- King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia.
| | - Jean-Marie Basset
- King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955-6900 Thuwal, Saudi Arabia.
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114
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Pan J, Shang Y, Yin J, De Bastiani M, Peng W, Dursun I, Sinatra L, El-Zohry AM, Hedhili MN, Emwas AH, Mohammed OF, Ning Z, Bakr OM. Bidentate Ligand-Passivated CsPbI3 Perovskite Nanocrystals for Stable Near-Unity Photoluminescence Quantum Yield and Efficient Red Light-Emitting Diodes. J Am Chem Soc 2017; 140:562-565. [DOI: 10.1021/jacs.7b10647] [Citation(s) in RCA: 594] [Impact Index Per Article: 84.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | - Yuequn Shang
- School of Physical Science and Technology, ShanghaiTech University, 100 Haike Road, Shanghai 201210, China
| | | | | | | | | | | | | | | | | | | | - Zhijun Ning
- School of Physical Science and Technology, ShanghaiTech University, 100 Haike Road, Shanghai 201210, China
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115
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Abstract
High surface area macroporous chalcogenide aerogels (chalcogels) MAu2GeS4 (M = Co, Ni) were prepared from K2Au2GeS4 precursor and Co(OAc)2 or NiCl2 by one-pot sol-gel metathesis reactions in aqueous media. The MAu2GeS4-chalcogels were screened for catalytic intramolecular hydroamination of 4-pentyn-1-amine substrate at different temperatures. 87% and 58% conversion was achieved at 100 °C, using CoAu2GeS4- and NiAu2GeS4-chalcogels respectively, and the reaction kinetics follows the first order. It was established that the catalytic performance of the aerogels is associated with the M2+ centers present in the structure. Intermolecular hydroamination of aniline with 1-R-4-ethynylbenzene (R = -H, -OCH3, -Br, -F) was carried out at 100 °C using CoAu2GeS4-chalcogel catalyst, due to its promising catalytic performance. The CoAu2GeS4-chalcogel regioselectively converted the pair of substrates to respective Markovnikov products, (E)-1-(4-R-phenyl)-N-phenylethan-1-imine, with 38% to 60% conversion.
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Affiliation(s)
- Bambar Davaasuren
- Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Abdul-Hamid Emwas
- Imaging and Characterization Core Lab, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Alexander Rothenberger
- Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Kingdom of Saudi Arabia
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116
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Hajjar D, Kremb S, Sioud S, Emwas AH, Voolstra CR, Ravasi T. Anti-cancer agents in Saudi Arabian herbals revealed by automated high-content imaging. PLoS One 2017; 12:e0177316. [PMID: 28609451 PMCID: PMC5469452 DOI: 10.1371/journal.pone.0177316] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2016] [Accepted: 04/25/2017] [Indexed: 12/14/2022] Open
Abstract
Natural products have been used for medical applications since ancient times. Commonly, natural products are structurally complex chemical compounds that efficiently interact with their biological targets, making them useful drug candidates in cancer therapy. Here, we used cell-based phenotypic profiling and image-based high-content screening to study the mode of action and potential cellular targets of plants historically used in Saudi Arabia’s traditional medicine. We compared the cytological profiles of fractions taken from Juniperus phoenicea (Arar), Anastatica hierochuntica (Kaff Maryam), and Citrullus colocynthis (Hanzal) with a set of reference compounds with established modes of action. Cluster analyses of the cytological profiles of the tested compounds suggested that these plants contain possible topoisomerase inhibitors that could be effective in cancer treatment. Using histone H2AX phosphorylation as a marker for DNA damage, we discovered that some of the compounds induced double-strand DNA breaks. Furthermore, chemical analysis of the active fraction isolated from Juniperus phoenicea revealed possible anti-cancer compounds. Our results demonstrate the usefulness of cell-based phenotypic screening of natural products to reveal their biological activities.
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Affiliation(s)
- Dina Hajjar
- KAUST Environmental Epigenetics Program, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Stephan Kremb
- Red Sea Research Center, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Salim Sioud
- Analytical Core Laboratory, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Abdul-Hamid Emwas
- NMR Core Laboratory, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Christian R. Voolstra
- Red Sea Research Center, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
- * E-mail: (TR); (CRV)
| | - Timothy Ravasi
- KAUST Environmental Epigenetics Program, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
- * E-mail: (TR); (CRV)
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117
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Chotana G, Batool F, Emwas AH, Gao X, Munawar M. Synthesis and Suzuki Cross-Coupling Reactions of 2,6-Bis(trifluoromethyl)pyridine-4-boronic Acid Pinacol Ester. SYNTHESIS-STUTTGART 2016. [DOI: 10.1055/s-0036-1588344] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Ghayoor Chotana
- Department of Chemistry, Syed Babar Ali School of Science & Engineering, Lahore University of Management Sciences
| | - Farhat Batool
- Department of Chemistry, Syed Babar Ali School of Science & Engineering, Lahore University of Management Sciences
| | - Abdul-Hamid Emwas
- Imaging and Characterization Core Lab, King Abdullah University of Science and Technology
| | - Xin Gao
- King Abdullah University of Science and Technology (KAUST), Computational Bioscience Research Center (CBRC), Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
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118
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Croissant JG, Fatieiev Y, Julfakyan K, Lu J, Emwas AH, Anjum DH, Omar H, Tamanoi F, Zink JI, Khashab NM. Frontispiece: Biodegradable Oxamide-Phenylene-Based Mesoporous Organosilica Nanoparticles with Unprecedented Drug Payloads for Delivery in Cells. Chemistry 2016. [DOI: 10.1002/chem.201684261] [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: 11/09/2022]
Affiliation(s)
- Jonas G. Croissant
- Smart Hybrid Materials Laboratory; Advanced Membranes and Porous Materials Center; King Abdullah University of Science and Technology; Thuwal Saudi Arabia
- Department of Chemistry and Biochemistry; California NanoSystems Institute; Jonsson Comprehensive Cancer Center; University of California Los Angeles; Los Angeles California USA
| | - Yevhen Fatieiev
- Smart Hybrid Materials Laboratory; Advanced Membranes and Porous Materials Center; King Abdullah University of Science and Technology; Thuwal Saudi Arabia
| | - Khachatur Julfakyan
- Smart Hybrid Materials Laboratory; Advanced Membranes and Porous Materials Center; King Abdullah University of Science and Technology; Thuwal Saudi Arabia
| | - Jie Lu
- Department of Microbiology; Immunology and Molecular Genetics; California NanoSystems Institute; Jonsson Comprehensive Cancer Center; University of California Los Angeles; Los Angeles California USA
| | - Abdul-Hamid Emwas
- Imaging and Characterization Laboratory; King Abdullah University of Science and Technology; Thuwal Saudi Arabia
| | - Dalaver H. Anjum
- Imaging and Characterization Laboratory; King Abdullah University of Science and Technology; Thuwal Saudi Arabia
| | - Haneen Omar
- Smart Hybrid Materials Laboratory; Advanced Membranes and Porous Materials Center; King Abdullah University of Science and Technology; Thuwal Saudi Arabia
| | - Fuyuhiko Tamanoi
- Department of Microbiology; Immunology and Molecular Genetics; California NanoSystems Institute; Jonsson Comprehensive Cancer Center; University of California Los Angeles; Los Angeles California USA
| | - Jeffrey I. Zink
- Department of Chemistry and Biochemistry; California NanoSystems Institute; Jonsson Comprehensive Cancer Center; University of California Los Angeles; Los Angeles California USA
| | - Niveen M. Khashab
- Smart Hybrid Materials Laboratory; Advanced Membranes and Porous Materials Center; King Abdullah University of Science and Technology; Thuwal Saudi Arabia
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119
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Peng W, Miao X, Adinolfi V, Alarousu E, El Tall O, Emwas AH, Zhao C, Walters G, Liu J, Ouellette O, Pan J, Murali B, Sargent EH, Mohammed OF, Bakr OM. Engineering of CH3
NH3
PbI3
Perovskite Crystals by Alloying Large Organic Cations for Enhanced Thermal Stability and Transport Properties. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604880] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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)
- Wei Peng
- Division of Physical Sciences and Engineering; King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Xiaohe Miao
- Imaging and Characterization Core Lab; King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Valerio Adinolfi
- Department of Electrical and Computer Engineering; University of Toronto; Toronto Ontario M5S 3G4 Canada
| | - Erkki Alarousu
- Division of Physical Sciences and Engineering; King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Omar El Tall
- Analytical Core Lab; King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Abdul-Hamid Emwas
- Imaging and Characterization Core Lab; King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Chao Zhao
- Imaging and Characterization Core Lab; King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Grant Walters
- Department of Electrical and Computer Engineering; University of Toronto; Toronto Ontario M5S 3G4 Canada
| | - Jiakai Liu
- Division of Physical Sciences and Engineering; King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Olivier Ouellette
- Department of Electrical and Computer Engineering; University of Toronto; Toronto Ontario M5S 3G4 Canada
| | - Jun Pan
- Division of Physical Sciences and Engineering; King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Banavoth Murali
- Division of Physical Sciences and Engineering; King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Edward H. Sargent
- Department of Electrical and Computer Engineering; University of Toronto; Toronto Ontario M5S 3G4 Canada
| | - Omar F. Mohammed
- Division of Physical Sciences and Engineering; King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Osman M. Bakr
- Division of Physical Sciences and Engineering; King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
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120
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Peng W, Miao X, Adinolfi V, Alarousu E, El Tall O, Emwas AH, Zhao C, Walters G, Liu J, Ouellette O, Pan J, Murali B, Sargent EH, Mohammed OF, Bakr OM. Engineering of CH3 NH3 PbI3 Perovskite Crystals by Alloying Large Organic Cations for Enhanced Thermal Stability and Transport Properties. Angew Chem Int Ed Engl 2016; 55:10686-90. [PMID: 27468159 DOI: 10.1002/anie.201604880] [Citation(s) in RCA: 128] [Impact Index Per Article: 16.0] [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: 05/18/2016] [Indexed: 11/08/2022]
Abstract
The number of studies on organic-inorganic hybrid perovskites has soared in recent years. However, the majority of hybrid perovskites under investigation are based on a limited number of organic cations of suitable sizes, such as methylammonium and formamidinium. These small cations easily fit into the perovskite's three-dimensional (3D) lead halide framework to produce semiconductors with excellent charge transport properties. Until now, larger cations, such as ethylammonium, have been found to form 2D crystals with lead halide. Here we show for the first time that ethylammonium can in fact be incorporated coordinately with methylammonium in the lattice of a 3D perovskite thanks to a balance of opposite lattice distortion strains. This inclusion results in higher crystal symmetry, improved material stability, and markedly enhanced charge carrier lifetime. This crystal engineering strategy of balancing opposite lattice distortion effects vastly increases the number of potential choices of organic cations for 3D perovskites, opening up new degrees of freedom to tailor their optoelectronic and environmental properties.
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Affiliation(s)
- Wei Peng
- Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Xiaohe Miao
- Imaging and Characterization Core Lab, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Valerio Adinolfi
- Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, M5S 3G4, Canada
| | - Erkki Alarousu
- Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Omar El Tall
- Analytical Core Lab, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Abdul-Hamid Emwas
- Imaging and Characterization Core Lab, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Chao Zhao
- Imaging and Characterization Core Lab, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Grant Walters
- Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, M5S 3G4, Canada
| | - Jiakai Liu
- Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Olivier Ouellette
- Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, M5S 3G4, Canada
| | - Jun Pan
- Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Banavoth Murali
- Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Edward H Sargent
- Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, M5S 3G4, Canada
| | - Omar F Mohammed
- Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Osman M Bakr
- Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
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121
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Croissant JG, Fatieiev Y, Julfakyan K, Lu J, Emwas AH, Anjum DH, Omar H, Tamanoi F, Zink JI, Khashab NM. Biodegradable Oxamide-Phenylene-Based Mesoporous Organosilica Nanoparticles with Unprecedented Drug Payloads for Delivery in Cells. Chemistry 2016; 22:14806-14811. [DOI: 10.1002/chem.201601714] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Jonas G. Croissant
- Smart Hybrid Materials Laboratory; Advanced Membranes and Porous Materials Center; King Abdullah University of Science and Technology; Thuwal Saudi Arabia
- Department of Chemistry and Biochemistry; California NanoSystems Institute; Jonsson Comprehensive Cancer Center; University of California Los Angeles; Los Angeles California USA
| | - Yevhen Fatieiev
- Smart Hybrid Materials Laboratory; Advanced Membranes and Porous Materials Center; King Abdullah University of Science and Technology; Thuwal Saudi Arabia
| | - Khachatur Julfakyan
- Smart Hybrid Materials Laboratory; Advanced Membranes and Porous Materials Center; King Abdullah University of Science and Technology; Thuwal Saudi Arabia
| | - Jie Lu
- Department of Microbiology; Immunology and Molecular Genetics; California NanoSystems Institute; Jonsson Comprehensive Cancer Center; University of California Los Angeles; Los Angeles California USA
| | - Abdul-Hamid Emwas
- Imaging and Characterization Laboratory; King Abdullah University of Science and Technology; Thuwal Saudi Arabia
| | - Dalaver H. Anjum
- Imaging and Characterization Laboratory; King Abdullah University of Science and Technology; Thuwal Saudi Arabia
| | - Haneen Omar
- Smart Hybrid Materials Laboratory; Advanced Membranes and Porous Materials Center; King Abdullah University of Science and Technology; Thuwal Saudi Arabia
| | - Fuyuhiko Tamanoi
- Department of Microbiology; Immunology and Molecular Genetics; California NanoSystems Institute; Jonsson Comprehensive Cancer Center; University of California Los Angeles; Los Angeles California USA
| | - Jeffrey I. Zink
- Department of Chemistry and Biochemistry; California NanoSystems Institute; Jonsson Comprehensive Cancer Center; University of California Los Angeles; Los Angeles California USA
| | - Niveen M. Khashab
- Smart Hybrid Materials Laboratory; Advanced Membranes and Porous Materials Center; King Abdullah University of Science and Technology; Thuwal Saudi Arabia
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122
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Soldan G, Aljuhani MA, Bootharaju MS, AbdulHalim LG, Parida MR, Emwas AH, Mohammed OF, Bakr OM. Gold Doping of Silver Nanoclusters: A 26-Fold Enhancement in the Luminescence Quantum Yield. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600267] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [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)
- Giada Soldan
- Division of Physical Sciences and Engineering; Solar and Photovoltaics Engineering Research Center (SPERC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Maha A. Aljuhani
- Division of Physical Sciences and Engineering; Solar and Photovoltaics Engineering Research Center (SPERC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Megalamane S. Bootharaju
- Division of Physical Sciences and Engineering; Solar and Photovoltaics Engineering Research Center (SPERC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Lina G. AbdulHalim
- Division of Physical Sciences and Engineering; Solar and Photovoltaics Engineering Research Center (SPERC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Manas R. Parida
- Division of Physical Sciences and Engineering; Solar and Photovoltaics Engineering Research Center (SPERC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Abdul-Hamid Emwas
- Imaging and Characterization Core Lab; King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Omar F. Mohammed
- Division of Physical Sciences and Engineering; Solar and Photovoltaics Engineering Research Center (SPERC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Osman M. Bakr
- Division of Physical Sciences and Engineering; Solar and Photovoltaics Engineering Research Center (SPERC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
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123
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Soldan G, Aljuhani MA, Bootharaju MS, AbdulHalim LG, Parida MR, Emwas AH, Mohammed OF, Bakr OM. Gold Doping of Silver Nanoclusters: A 26-Fold Enhancement in the Luminescence Quantum Yield. Angew Chem Int Ed Engl 2016; 55:5749-53. [DOI: 10.1002/anie.201600267] [Citation(s) in RCA: 223] [Impact Index Per Article: 27.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Revised: 02/23/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Giada Soldan
- Division of Physical Sciences and Engineering; Solar and Photovoltaics Engineering Research Center (SPERC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Maha A. Aljuhani
- Division of Physical Sciences and Engineering; Solar and Photovoltaics Engineering Research Center (SPERC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Megalamane S. Bootharaju
- Division of Physical Sciences and Engineering; Solar and Photovoltaics Engineering Research Center (SPERC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Lina G. AbdulHalim
- Division of Physical Sciences and Engineering; Solar and Photovoltaics Engineering Research Center (SPERC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Manas R. Parida
- Division of Physical Sciences and Engineering; Solar and Photovoltaics Engineering Research Center (SPERC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Abdul-Hamid Emwas
- Imaging and Characterization Core Lab; King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Omar F. Mohammed
- Division of Physical Sciences and Engineering; Solar and Photovoltaics Engineering Research Center (SPERC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Osman M. Bakr
- Division of Physical Sciences and Engineering; Solar and Photovoltaics Engineering Research Center (SPERC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
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124
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Samai S, Sapsanis C, Patil SP, Ezzeddine A, Moosa BA, Omran H, Emwas AH, Salama KN, Khashab NM. A light responsive two-component supramolecular hydrogel: a sensitive platform for the fabrication of humidity sensors. Soft Matter 2016; 12:2842-2845. [PMID: 26908051 DOI: 10.1039/c6sm00272b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The supramolecular assembly of anionic azobenzene dicarboxylate and cationic cetyltrimethylammonium bromide (CTAB) formed a stimuli responsive hydrogel with a critical gelation concentration (CGC) of 0.33 wt%. This self-sustainable two-component system was able to repair damage upon light irradiation. Moreover, it was successfully employed in the fabrication of highly sensitive humidity sensors for the first time.
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Affiliation(s)
- Suman Samai
- King Abdullah University of Science and Technology (KAUST), Advance Membranes and Porous Materials Center, Smart Hybrid Materials Laboratory (SHMs), Thuwal, Makkah 23955-6900, Kingdom of Saudi Arabia.
| | - Christos Sapsanis
- Sensors Lab, Electrical Engineering Program, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Sachin P Patil
- King Abdullah University of Science and Technology (KAUST), Advance Membranes and Porous Materials Center, Smart Hybrid Materials Laboratory (SHMs), Thuwal, Makkah 23955-6900, Kingdom of Saudi Arabia.
| | - Alaa Ezzeddine
- King Abdullah University of Science and Technology (KAUST), Advance Membranes and Porous Materials Center, Smart Hybrid Materials Laboratory (SHMs), Thuwal, Makkah 23955-6900, Kingdom of Saudi Arabia.
| | - Basem A Moosa
- King Abdullah University of Science and Technology (KAUST), Advance Membranes and Porous Materials Center, Smart Hybrid Materials Laboratory (SHMs), Thuwal, Makkah 23955-6900, Kingdom of Saudi Arabia.
| | - Hesham Omran
- Sensors Lab, Electrical Engineering Program, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Abdul-Hamid Emwas
- Imaging and Characterization Core Lab, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Khaled N Salama
- Sensors Lab, Electrical Engineering Program, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Niveen M Khashab
- King Abdullah University of Science and Technology (KAUST), Advance Membranes and Porous Materials Center, Smart Hybrid Materials Laboratory (SHMs), Thuwal, Makkah 23955-6900, Kingdom of Saudi Arabia.
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125
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Emwas AH, Roy R, McKay RT, Ryan D, Brennan L, Tenori L, Luchinat C, Gao X, Zeri AC, Gowda GAN, Raftery D, Steinbeck C, Salek RM, Wishart DS. Recommendations and Standardization of Biomarker Quantification Using NMR-Based Metabolomics with Particular Focus on Urinary Analysis. J Proteome Res 2016; 15:360-73. [PMID: 26745651 PMCID: PMC4865177 DOI: 10.1021/acs.jproteome.5b00885] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
NMR-based metabolomics has shown considerable promise in disease diagnosis and biomarker discovery because it allows one to nondestructively identify and quantify large numbers of novel metabolite biomarkers in both biofluids and tissues. Precise metabolite quantification is a prerequisite to move any chemical biomarker or biomarker panel from the lab to the clinic. Among the biofluids commonly used for disease diagnosis and prognosis, urine has several advantages. It is abundant, sterile, and easily obtained, needs little sample preparation, and does not require invasive medical procedures for collection. Furthermore, urine captures and concentrates many "unwanted" or "undesirable" compounds throughout the body, providing a rich source of potentially useful disease biomarkers; however, incredible variation in urine chemical concentrations makes analysis of urine and identification of useful urinary biomarkers by NMR challenging. We discuss a number of the most significant issues regarding NMR-based urinary metabolomics with specific emphasis on metabolite quantification for disease biomarker applications and propose data collection and instrumental recommendations regarding NMR pulse sequences, acceptable acquisition parameter ranges, relaxation effects on quantitation, proper handling of instrumental differences, sample preparation, and biomarker assessment.
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Affiliation(s)
- Abdul-Hamid Emwas
- Imaging and Characterization Core Lab, KAUST , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Raja Roy
- Centre of Biomedical Research, formerly, Centre of Biomedical Magnetic Resonance, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus , Lucknow, Uttar Pradesh, India
| | - Ryan T McKay
- Department of Chemistry, University of Alberta , Edmonton, Alberta, Canada
| | - Danielle Ryan
- School of Agricultural and Wine Sciences, Charles Sturt University , Bathurst, New South Wales, Australia
| | - Lorraine Brennan
- UCD Insitute of Food and Health, UCD , Belfield, Dublin, Ireland
| | - Leonardo Tenori
- FiorGen Foundation , 50019 Sesto Fiorentino, Florence, Italy
| | - Claudio Luchinat
- Centro Risonanze Magnetiche - CERM, University of Florence , Florence, Italy
| | - Xin Gao
- Computational Bioscience Research Center, Computer, Electrical and Mathematical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Ana Carolina Zeri
- Brazilian Biosciences National Laboratory, LNBio , Campinas, São Paulo, Brazil
| | - G A Nagana Gowda
- Northwest Metabolomics Research Center, Department of Anesthesiology and Pain Medicine, University of Washington , 850 Republican Street, Seattle, Washington 98109, United States
| | - Daniel Raftery
- Northwest Metabolomics Research Center, Department of Anesthesiology and Pain Medicine, University of Washington , 850 Republican Street, Seattle, Washington 98109, United States.,Fred Hutchinson Cancer Research Center , 1100 Fairview Avenue, Seattle, Washington 98109, United States
| | - Christoph Steinbeck
- European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI) , Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SD, United Kingdom
| | - Reza M Salek
- European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI) , Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SD, United Kingdom
| | - David S Wishart
- Department of Biological Sciences, University of Alberta , Edmonton, Alberta, Canada
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126
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Alezi D, Belmabkhout Y, Suyetin M, Bhatt PM, Weseliński ŁJ, Solovyeva V, Adil K, Spanopoulos I, Trikalitis PN, Emwas AH, Eddaoudi M. MOF Crystal Chemistry Paving the Way to Gas Storage Needs: Aluminum-Based soc-MOF for CH4, O2, and CO2 Storage. J Am Chem Soc 2015; 137:13308-18. [PMID: 26364990 PMCID: PMC4616230 DOI: 10.1021/jacs.5b07053] [Citation(s) in RCA: 393] [Impact Index Per Article: 43.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
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The molecular building block approach
was employed effectively
to construct a series of novel isoreticular, highly porous and stable,
aluminum-based metal–organic frameworks with soc topology. From this platform, three compounds were experimentally
isolated and fully characterized: namely, the parent Al-soc-MOF-1 and its naphthalene and anthracene analogues. Al-soc-MOF-1 exhibits outstanding gravimetric methane uptake (total and
working capacity). It is shown experimentally, for the first time,
that the Al-soc-MOF platform can address the challenging
Department of Energy dual target of 0.5 g/g (gravimetric) and 264
cm3 (STP)/cm3 (volumetric) methane storage.
Furthermore, Al-soc-MOF exhibited the highest total gravimetric
and volumetric uptake for carbon dioxide and the utmost total and
deliverable uptake for oxygen at relatively high pressures among all
microporous MOFs. In order to correlate the MOF pore structure and
functionality to the gas storage properties, to better understand
the structure–property relationship, we performed a molecular
simulation study and evaluated the methane storage performance of
the Al-soc-MOF platform using diverse organic linkers.
It was found that shortening the parent Al-soc-MOF-1
linker resulted in a noticeable enhancement in the working volumetric
capacity at specific temperatures and pressures with amply conserved
gravimetric uptake/working capacity. In contrast, further expansion
of the organic linker (branches and/or core) led to isostructural
Al-soc-MOFs with enhanced gravimetric uptake but noticeably
lower volumetric capacity. The collective experimental and simulation
studies indicated that the parent Al-soc-MOF-1 exhibits
the best compromise between the volumetric and gravimetric total and
working uptakes under a wide range of pressure and temperature conditions.
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Affiliation(s)
| | | | | | | | | | | | | | - Ioannis Spanopoulos
- Department of Chemistry, University of Crete , Voutes, 71003 Heraklion, Greece
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Liu Z, Dong X, Zhu Y, Emwas AH, Zhang D, Tian Q, Han Y. Investigating the Influence of Mesoporosity in Zeolite Beta on Its Catalytic Performance for the Conversion of Methanol to Hydrocarbons. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01350] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhaohui Liu
- Advanced
Membranes and Porous Materials Center, Physical Sciences
and Engineering Division, and ‡Imaging and Characterization Core Lab, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Xinglong Dong
- Advanced
Membranes and Porous Materials Center, Physical Sciences
and Engineering Division, and ‡Imaging and Characterization Core Lab, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Yihan Zhu
- Advanced
Membranes and Porous Materials Center, Physical Sciences
and Engineering Division, and ‡Imaging and Characterization Core Lab, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Abdul-Hamid Emwas
- Advanced
Membranes and Porous Materials Center, Physical Sciences
and Engineering Division, and ‡Imaging and Characterization Core Lab, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Daliang Zhang
- Advanced
Membranes and Porous Materials Center, Physical Sciences
and Engineering Division, and ‡Imaging and Characterization Core Lab, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Qiwei Tian
- Advanced
Membranes and Porous Materials Center, Physical Sciences
and Engineering Division, and ‡Imaging and Characterization Core Lab, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Yu Han
- Advanced
Membranes and Porous Materials Center, Physical Sciences
and Engineering Division, and ‡Imaging and Characterization Core Lab, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
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128
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Batool F, Parveen S, Emwas AH, Sioud S, Gao X, Munawar MA, Chotana GA. Synthesis of Fluoroalkoxy Substituted Arylboronic Esters by Iridium-Catalyzed Aromatic C-H Borylation. Org Lett 2015; 17:4256-9. [PMID: 26278016 DOI: 10.1021/acs.orglett.5b02050] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The preparation of fluoroalkoxy arylboronic esters by iridium-catalyzed aromatic C-H borylation is described. The fluoroalkoxy groups employed include trifluoromethoxy, difluoromethoxy, 1,1,2,2-tetrafluoroethoxy, and 2,2-difluoro-1,3-benzodioxole. The borylation reactions were carried out neat without the use of a glovebox or Schlenk line. The regioselectivities available through the iridium-catalyzed C-H borylation are complementary to those obtained by the electrophilic aromatic substitution reactions of fluoroalkoxy arenes. Fluoroalkoxy arylboronic esters can serve as versatile building blocks.
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Affiliation(s)
- Farhat Batool
- Department of Chemistry, Syed Babar Ali School of Science & Engineering, Lahore University of Management Sciences , Lahore 54792, Pakistan.,Institute of Chemistry, University of the Punjab , Lahore 54590, Pakistan
| | - Shehla Parveen
- Department of Chemistry, Syed Babar Ali School of Science & Engineering, Lahore University of Management Sciences , Lahore 54792, Pakistan
| | - Abdul-Hamid Emwas
- Imaging and Characterization Core Lab, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Salim Sioud
- Imaging and Characterization Core Lab, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Xin Gao
- Computer, Electrical and Mathematical Sciences and Engineering Division, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Munawar A Munawar
- Institute of Chemistry, University of the Punjab , Lahore 54590, Pakistan
| | - Ghayoor A Chotana
- Department of Chemistry, Syed Babar Ali School of Science & Engineering, Lahore University of Management Sciences , Lahore 54792, Pakistan
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129
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Al-Bloushi M, Davaasuren B, Emwas AH, Rothenberger A. Synthesis and Characterization of the Quaternary ThioaluminogermanatesA(AlS2)(GeS2) (A= Na, K). Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201500021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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130
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Emwas AH, Luchinat C, Turano P, Tenori L, Roy R, Salek RM, Ryan D, Merzaban JS, Kaddurah-Daouk R, Zeri AC, Nagana Gowda GA, Raftery D, Wang Y, Brennan L, Wishart DS. Standardizing the experimental conditions for using urine in NMR-based metabolomic studies with a particular focus on diagnostic studies: a review. Metabolomics 2015; 11:872-894. [PMID: 26109927 PMCID: PMC4475544 DOI: 10.1007/s11306-014-0746-7] [Citation(s) in RCA: 150] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Accepted: 10/27/2014] [Indexed: 02/08/2023]
Abstract
The metabolic composition of human biofluids can provide important diagnostic and prognostic information. Among the biofluids most commonly analyzed in metabolomic studies, urine appears to be particularly useful. It is abundant, readily available, easily stored and can be collected by simple, noninvasive techniques. Moreover, given its chemical complexity, urine is particularly rich in potential disease biomarkers. This makes it an ideal biofluid for detecting or monitoring disease processes. Among the metabolomic tools available for urine analysis, NMR spectroscopy has proven to be particularly well-suited, because the technique is highly reproducible and requires minimal sample handling. As it permits the identification and quantification of a wide range of compounds, independent of their chemical properties, NMR spectroscopy has been frequently used to detect or discover disease fingerprints and biomarkers in urine. Although protocols for NMR data acquisition and processing have been standardized, no consensus on protocols for urine sample selection, collection, storage and preparation in NMR-based metabolomic studies have been developed. This lack of consensus may be leading to spurious biomarkers being reported and may account for a general lack of reproducibility between laboratories. Here, we review a large number of published studies on NMR-based urine metabolic profiling with the aim of identifying key variables that may affect the results of metabolomics studies. From this survey, we identify a number of issues that require either standardization or careful accounting in experimental design and provide some recommendations for urine collection, sample preparation and data acquisition.
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Affiliation(s)
- Abdul-Hamid Emwas
- Imaging and Characterization Core Lab, King Abdullah University of Science and Technology, KSA, Thuwal, Saudi Arabia
| | - Claudio Luchinat
- Centro Risonanze Magnetiche – CERM, University of Florence, Florence, Italy
| | - Paola Turano
- Centro Risonanze Magnetiche – CERM, University of Florence, Florence, Italy
| | | | - Raja Roy
- Centre of Biomedical Research, Formerly known as Centre of Biomedical Magnetic Resonance, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Lucknow, India
| | - Reza M. Salek
- Department of Biochemistry & Cambridge Systems Biology Centre, University of Cambridge, Cambridge, UK
- European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Wellcome Trust Genome Campus, Cambridge, CB10 1SD UK
| | - Danielle Ryan
- School of Agricultural and Wine Sciences, Charles Sturt University, Wagga Wagga, Australia
| | - Jasmeen S. Merzaban
- Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, KSA, Thuwal, Saudi Arabia
| | - Rima Kaddurah-Daouk
- Pharmacometabolomics Center, School of Medicine, Duke University, Durham, USA
| | - Ana Carolina Zeri
- Brazilian Biosciences National Laboratory, LNBio, Campinas, SP Brazil
| | - G. A. Nagana Gowda
- Department of Anethesiology and Pain Medicine, Northwest Metabolomics Research Center, University of Washington, 850 Republican St., Seattle, WA 98109 USA
| | - Daniel Raftery
- Department of Anethesiology and Pain Medicine, Northwest Metabolomics Research Center, University of Washington, 850 Republican St., Seattle, WA 98109 USA
| | - Yulan Wang
- Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Beijing, China
| | - Lorraine Brennan
- Institute of Food and Health and Conway Institute, School of Agriculture & Food Science, Dublin 4, Ireland
| | - David S. Wishart
- Department of Computing Science, University of Alberta, Edmonton, Alberta Canada
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131
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Zubair M, Jose J, Emwas AH, Al-Harthi MA. Effect of modified graphene and microwave irradiation on the mechanical and thermal properties of poly(styrene-co-methyl methacrylate)/graphene nanocomposites. SURF INTERFACE ANAL 2014. [DOI: 10.1002/sia.5630] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mukarram Zubair
- Department of Chemical Engineering; King Fahd University of Petroleum and Minerals; 31261 Dhahran Saudi Arabia
| | - Jobin Jose
- Department of Chemical Engineering; King Fahd University of Petroleum and Minerals; 31261 Dhahran Saudi Arabia
| | - Abdul-Hamid Emwas
- NMR Core lab; King Abdullah University of Science and Technology; 23955 Thuwal Saudi Arabia
| | - Mamdouh A. Al-Harthi
- Department of Chemical Engineering; King Fahd University of Petroleum and Minerals; 31261 Dhahran Saudi Arabia
- Center of Research Excellence in Nanotechnology; King Fahd University of Petroleum and Minerals; 31261 Dhahran Saudi Arabia
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132
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Khan MT, Busch M, Molina VG, Emwas AH, Aubry C, Croue JP. How different is the composition of the fouling layer of wastewater reuse and seawater desalination RO membranes? Water Res 2014; 59:271-282. [PMID: 24810743 DOI: 10.1016/j.watres.2014.04.020] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 04/06/2014] [Accepted: 04/09/2014] [Indexed: 06/03/2023]
Abstract
To study the effect of water quality and operating parameters on membrane fouling, a comparative analysis of wastewater (WW) and seawater (SW) fouled reverse osmosis (RO) membranes was conducted. Membranes were harvested from SWRO and WWRO pilot plants located in Vilaseca (East Spain), both using ultrafiltration as pretreatment. The SWRO unit was fed with Mediterranean seawater and the WWRO unit was operated using secondary effluent collected from the municipal wastewater treatment plant. Lead and terminal SWRO and WWRO modules were autopsied after five months and three months of operation, respectively. Ultrastructural, chemical, and microbiological analyses of the fouling layers were performed. Results showed that the WWRO train had mainly bio/organic fouling at the lead position element and inorganic fouling at terminal position element, whereas SWRO train had bio/organic fouling at both end position elements. In the case of WWRO membranes, Betaproteobacteria was the major colonizing species; while Ca, S, and P were the major present inorganic elements. The microbial population of SWRO membranes was mainly represented by Alpha and Gammaproteobacteria. Ca, Fe, and S were the main identified inorganic elements of the fouling layer of SWRO membranes. These results confirmed that the RO fouling layer composition is strongly impacted by the source water quality.
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Affiliation(s)
- Muhammad Tariq Khan
- Water Desalination and Reuse Research Center, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia.
| | | | | | - Abdul-Hamid Emwas
- NMR Core Lab, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Cyril Aubry
- Water Desalination and Reuse Research Center, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Jean-Philippe Croue
- Water Desalination and Reuse Research Center, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia.
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133
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Patil U, Fihri A, Emwas AH, Polshettiwar V. Silicon oxynitrides of KCC-1, SBA-15 and MCM-41 for CO2 capture with excellent stability and regenerability. Chem Sci 2012. [DOI: 10.1039/c2sc20356a] [Citation(s) in RCA: 102] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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134
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Mayo D, Zhou A, Sahu I, McCarrick R, Walton P, Ring A, Troxel K, Coey A, Hawn J, Emwas AH, Lorigan GA. Probing the structure of membrane proteins with electron spin echo envelope modulation spectroscopy. Protein Sci 2011; 20:1100-4. [PMID: 21563228 DOI: 10.1002/pro.656] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Revised: 04/26/2011] [Accepted: 05/03/2011] [Indexed: 11/09/2022]
Abstract
A new approach has been developed to probe the structural properties of membrane peptides and proteins using the pulsed electron paramagnetic resonance technique of electron spin echo envelope modulation (ESEEM) spectroscopy and the α-helical M2δ subunit of the acetylcholine receptor incorporated into phospholipid bicelles. To demonstrate the practicality of this method, a cysteine-mutated nitroxide spin label (SL) is positioned 1, 2, 3, and 4 residues away from a fully deuterated Val side chain (denoted i + 1 to i + 4). The characteristic periodicity of the α-helical structure gives rise to a unique pattern in the ESEEM spectra. In the i + 1 and i + 2 samples, the ²H nuclei are too far away to be detected. However, with the 3.6 residue per turn pattern of an α-helix, the i + 3 and i + 4 samples reveal a strong signal from the ²H nuclei of the Val side chain. Modeling studies verify these data suggesting that the closest ²H-labeled Val to SL distance would in fact be expected in the i + 3 and i + 4 samples. This technique is very advantageous, because it provides pertinent qualitative structural information on an inherently difficult system like membrane proteins in a short period of time (minutes) with small amounts of protein (μg).
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Affiliation(s)
- Daniel Mayo
- Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio, USA
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135
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Antakly T, Chen L, Lafaille F, Toma E, Menezes J, Emwas AH, Brox A. Abstract LB-81: Purification and characterization of a human urinary compound with potent anticancer activity. Cancer Res 2010. [DOI: 10.1158/1538-7445.am10-lb-81] [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: 11/16/2022]
Abstract
Abstract
Historically, the urine, considered as a blood filtrate has been recognized as a source of medicinal products and important constituents of widely used drugs. However, various molecules in human urine such as growth factors, hormones, and their metabolites have not yet been thoroughly characterized. A group of low molecular weight compounds named HIP's (HCG-like Inhibitory Proteins), was discovered in our laboratories while investigating the hormonal regulation of a skin cancer, Kaposi's sarcoma (KS). Following extraction from the urine of pregnant women, HIP was found to inhibit the growth and kill KS cancer cells by apoptosis both in vitro and in vivo. Initial results following intralesional injection with HIP, revealed a marked reduction in the number of neoplastic cells in the tumor. We are presently testing this product in clinical trials on KS patients in a double blind placebo controlled study. Preliminary results reveal HIP to be safe and well tolerated with no adverse or unexpected reactions. More recently, two other tumors types were demonstrated to be sensitive to HIP and are under further investigation. Following the use of gene microarrays and RT-PCR, the principal target genes for HIP were identified as belonging to a growth factor receptor family. Further purification and biochemical characterization is underway using proteomics and NMR spectroscopy. Overall, the present studies further establish HIP as a urinary compound with potent anti-cancer activity.
Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 101st Annual Meeting of the American Association for Cancer Research; 2010 Apr 17-21; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2010;70(8 Suppl):Abstract nr LB-81.
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Affiliation(s)
- Tony Antakly
- 1University of Montreal, Montreal, Quebec, Canada
| | - Ling Chen
- 1University of Montreal, Montreal, Quebec, Canada
| | | | - Emil Toma
- 1University of Montreal, Montreal, Quebec, Canada
| | | | | | - Alan Brox
- 3McGill University, Montreal, Quebec, Canada
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136
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Ludwig C, Marin-Montesinos I, Saunders MG, Emwas AH, Pikramenou Z, Hammond SP, Günther UL. Application of ex situ dynamic nuclear polarization in studying small molecules. Phys Chem Chem Phys 2010; 12:5868-71. [DOI: 10.1039/c002700f] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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137
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Tiziani S, Emwas AH, Lodi A, Ludwig C, Bunce CM, Viant MR, Günther UL. Optimized metabolite extraction from blood serum for 1H nuclear magnetic resonance spectroscopy. Anal Biochem 2008; 377:16-23. [PMID: 18312846 DOI: 10.1016/j.ab.2008.01.037] [Citation(s) in RCA: 126] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2007] [Revised: 01/15/2008] [Accepted: 01/16/2008] [Indexed: 10/22/2022]
Abstract
Blood serum is commonly used for clinical diagnostics because its protein composition bears a wealth of information about the health of an organism. More recently the analysis of the small molecule composition, the metabolome, has received increased attention because the metabolite composition is influenced by many diseases, by the administration of drugs and toxins, and by the diet and life style of an individual. When nuclear magnetic resonance spectroscopy is used as an analytical tool it is often preferable to remove catalytically active proteins, in particular for longer measurements, because metabolite concentrations are otherwise in constant flux. Here we have compared different protocols for the separation of proteins and metabolites, including precipitation methods and ultrafiltration. Whereas most extraction methods involving protein precipitation deplete some metabolites, ultrafiltration is superior in retaining metabolite concentrations and offers excellent reproducibility. We also describe a new method to recover the hydrophobic fraction for ultrafiltration with good reproducibility.
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Affiliation(s)
- Stefano Tiziani
- Henry Wellcome Building for Biomolecular NMR Spectroscopy, CR UK Institute for Cancer Studies, University of Birmingham, Birmingham B15 2TT, UK
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