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Vuković JP, Tišma M. The role of NMR spectroscopy in lignocellulosic biomass characterisation: A mini review. FOOD CHEMISTRY. MOLECULAR SCIENCES 2024; 9:100219. [PMID: 39263258 PMCID: PMC11388798 DOI: 10.1016/j.fochms.2024.100219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 07/23/2024] [Accepted: 08/17/2024] [Indexed: 09/13/2024]
Abstract
Lignocellulosic biomass (LB) is promising feedstock for the production of various bio-based products. However, due to its heterogenous character, complex chemical structure and recalcitrance, it is necessary to know its structural composition in order to optimize pretreatment process and further (bio)conversion into bio-based products. Nuclear Magnetic Resonance (NMR) spectroscopy is a fast and reliable method that can provide advanced data on the molecular architecture and composition of lignocellulosic biomass. In this brief overview, characteristic examples of the use of high-resolution NMR spectroscopy for the investigation of various types of LB and their structural units are given and the main drawbacks and future perspectives are outlined.
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Affiliation(s)
| | - Marina Tišma
- Josip Juraj Strossmayer University of Osijek, Faculty of Food Technology Osijek, Franje Kuhača 18, HR-31000 Osijek, Croatia
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2
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Li Z, Jiang H, Zhu M, Zhang F. Self-Supported Chiral Dirhodium Organic Frameworks Enables Efficient Asymmetric Cyclopropanation. ACS APPLIED MATERIALS & INTERFACES 2024; 16:19003-19013. [PMID: 38566322 DOI: 10.1021/acsami.4c02215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
The development of heterogeneous chiral dirhodium catalysts for fabricating important bioactive substances and reducing the loss of noble metals has long been of significant interest. However, there still remains formidable synthetic challenges since it requires multiple steps of the synthetic process, and rhodium is easily leached from solid materials during the reaction. Here, we demonstrated a self-supported strategy based on the Suzuki-Miyaura coupling reaction to construct two chiral dirhodium organic frameworks for heterogeneous asymmetric catalysis. The synthetic approach is simple and efficient since it requires only a small number of preparation steps and does not require any catalyst supporting materials. The obtained chiral dirhodium materials can be highly efficient and recyclable heterogeneous catalysts for asymmetric cyclopropanation between diazooxindole and alkenes. Importantly, Rh2-MOCP-2 exhibited almost similar catalytic performance compared to homogeneous catalyst Rh2(S-Br-NTTL)4. The afforded catalytic performance (93.9% yield with 80.9% ee) highly surpasses previous heterogeneous dirhodium catalysts reported to date.
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Affiliation(s)
- Zhenzhong Li
- Department of Chemistry, Shanghai Normal University, Shanghai 200234, China
- Technical University of Darmstadt, Institute of Inorganic and Physical Chemistry, Darmstadt D-64287, Germany
| | - Huating Jiang
- Department of Chemistry, Shanghai Normal University, Shanghai 200234, China
| | - Mingxiang Zhu
- Department of Chemistry, Shanghai Normal University, Shanghai 200234, China
| | - Fang Zhang
- Department of Chemistry, Shanghai Normal University, Shanghai 200234, China
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3
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Deiana L, Badali E, Rafi AA, Tai CW, Bäckvall JE, Córdova A. Cellulose-Supported Heterogeneous Gold-Catalyzed Cycloisomerization Reactions of Alkynoic Acids and Allenynamides. ACS Catal 2023; 13:10418-10424. [PMID: 37560186 PMCID: PMC10407851 DOI: 10.1021/acscatal.3c02722] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 07/19/2023] [Indexed: 08/11/2023]
Abstract
Herein, we describe efficient nanogold-catalyzed cycloisomerization reactions of alkynoic acids and allenynamides to enol lactones and dihydropyrroles, respectively (the latter via an Alder-ene reaction). The gold nanoparticles were immobilized on thiol-functionalized microcrystalline cellulose and characterized by electron microscopy (HAADF-STEM) and by XPS. The thiol-stabilized gold nanoparticles (Au0) were obtained in the size range 1.5-6 nm at the cellulose surface. The robust and sustainable cellulose-supported gold nanocatalyst can be recycled for multiple cycles without losing activity.
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Affiliation(s)
- Luca Deiana
- Department
of Natural Sciences, Mid Sweden University, Holmgatan 10, SE-85179 Sundsvall, Sweden
| | - Elham Badali
- Department
of Natural Sciences, Mid Sweden University, Holmgatan 10, SE-85179 Sundsvall, Sweden
| | - Abdolrahim A. Rafi
- Department
of Natural Sciences, Mid Sweden University, Holmgatan 10, SE-85179 Sundsvall, Sweden
| | - Cheuk-Wai Tai
- Department
of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Jan-E Bäckvall
- Department
of Natural Sciences, Mid Sweden University, Holmgatan 10, SE-85179 Sundsvall, Sweden
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691 Stockholm, Sweden
| | - Armando Córdova
- Department
of Natural Sciences, Mid Sweden University, Holmgatan 10, SE-85179 Sundsvall, Sweden
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4
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Wei B, Sharland JC, Blackmond DG, Musaev DG, Davies HML. In-situ Kinetic Studies of Rh(II)-Catalyzed C-H Functionalization to Achieve High Catalyst Turnover Numbers. ACS Catal 2022; 12:13400-13410. [PMID: 37274060 PMCID: PMC10237631 DOI: 10.1021/acscatal.2c04115] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Detailed kinetic studies on the functionalization of unactivated hydrocarbon sp3 C-H bonds by dirhodium-catalyzed reaction of aryldiazoacetates revealed that the C-H functionalization step is rate-determining. The efficiency of this step was increased by using the hydrocarbon as solvent and using donor/acceptor carbenes with an electron-withdrawing substituent on the aryl donor group. The optimum catalyst for these reactions is the tetraphenylphthalimido derivative Rh2(R-TPPTTL)4 and a further beneficial refinement was obtained by using N,N'-dicyclohexylcarbodiimide as an additive. Under the optimum conditions with a catalyst loading of 0.001 mol %, effective enantioselective C-H functionalization (66-97% yield, 83-97% ee) was achieved of cycloalkanes with a range of aryldiazoacetates as long as the aryldiazoacetate was not to sterically demanding. The reaction with cyclohexane using a catalyst loading of 0.0005 mol % could be recharged twice with additional aryldiazoacetate, resulting in an overall dirhodium catalyst turnover number of 580,000.
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Affiliation(s)
- Bo Wei
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Jack C. Sharland
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Donna G. Blackmond
- Department of Chemistry, The Scripps Research Institute, La Jolla, California, 92037, United States
| | - Djamaladdin G. Musaev
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
- Cherry L. Emerson Center for Scientific Computation, Emory University, 1521 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Huw M. L. Davies
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
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5
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Adegoke KA, Oyedotun KO, Ighalo J, Amaku JF, Olisah C, Adeola AO, Iwuozor KO, Akpomie KG, Conradie J. Cellulose derivatives and cellulose-metal-organic frameworks for CO2 adsorption and separation. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.102163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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6
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Wegrzynowska-Drzymalska K, Mlynarczyk DT, Chelminiak-Dudkiewicz D, Kaczmarek H, Goslinski T, Ziegler-Borowska M. Chitosan-Gelatin Films Cross-Linked with Dialdehyde Cellulose Nanocrystals as Potential Materials for Wound Dressings. Int J Mol Sci 2022; 23:9700. [PMID: 36077096 PMCID: PMC9456065 DOI: 10.3390/ijms23179700] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 08/20/2022] [Accepted: 08/24/2022] [Indexed: 11/17/2022] Open
Abstract
In this study, thin chitosan-gelatin biofilms cross-linked with dialdehyde cellulose nanocrystals for dressing materials were received. Two types of dialdehyde cellulose nanocrystals from fiber (DNCL) and microcrystalline cellulose (DAMC) were obtained by periodate oxidation. An ATR-FTIR analysis confirmed the selective oxidation of cellulose nanocrystals with the creation of a carbonyl group at 1724 cm-1. A higher degree of cross-linking was obtained in chitosan-gelatin biofilms with DNCL than with DAMC. An increasing amount of added cross-linkers resulted in a decrease in the apparent density value. The chitosan-gelatin biofilms cross-linked with DNCL exhibited a higher value of roughness parameters and antioxidant activity compared with materials cross-linked with DAMC. The cross-linking process improved the oxygen permeability and anti-inflammatory properties of both measurement series. Two samples cross-linked with DNCL achieved an ideal water vapor transition rate for wound dressings, CS-Gel with 10% and 15% addition of DNCL-8.60 and 9.60 mg/cm2/h, respectively. The swelling ability and interaction with human serum albumin (HSA) were improved for biofilms cross-linked with DAMC and DNCL. Significantly, the films cross-linked with DAMC were characterized by lower toxicity. These results confirmed that chitosan-gelatin biofilms cross-linked with DNCL and DAMC had improved properties for possible use in wound dressings.
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Affiliation(s)
- Katarzyna Wegrzynowska-Drzymalska
- Department of Biomedical Chemistry and Polymer Science, Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 7, 87-100 Torun, Poland
| | - Dariusz T. Mlynarczyk
- Chair and Department of Chemical Technology of Drugs, Poznan University of Medical Sciences, Grunwaldzka 6, 60-780 Poznan, Poland
| | - Dorota Chelminiak-Dudkiewicz
- Department of Biomedical Chemistry and Polymer Science, Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 7, 87-100 Torun, Poland
| | - Halina Kaczmarek
- Department of Biomedical Chemistry and Polymer Science, Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 7, 87-100 Torun, Poland
| | - Tomasz Goslinski
- Chair and Department of Chemical Technology of Drugs, Poznan University of Medical Sciences, Grunwaldzka 6, 60-780 Poznan, Poland
| | - Marta Ziegler-Borowska
- Department of Biomedical Chemistry and Polymer Science, Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 7, 87-100 Torun, Poland
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7
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Li Z, Jiang H, Liu J, Ning T, Phan NTS, Zhang F. Self-Adaptive Dirhodium Complexes in a Metal-Organic Framework for Synthesis of N-H Aziridines. ACS APPLIED MATERIALS & INTERFACES 2022; 14:30714-30723. [PMID: 35785968 DOI: 10.1021/acsami.2c04603] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Conformational dynamics of active sites in enzymes enable great control over the catalytic process. Herein, we constructed a metal-organic framework with conformationally dynamic active sites (Rh2-ZIF-8). The active sites in Rh2-ZIF-8 were composed of the imidazolate-bridged bimetallic center with a catalytic dirhodium moiety and structural zinc site. Even though the coordination sphere of the dirhodium species was saturated with two circularly arranged esp groups and two axial 2-MeIm ligands, it could still effectively catalyze the direct synthesis of N-H aziridines from olefins with high activity. We found that such a self-adaptive catalytic process was based on the dynamic breakage and reformation of the rhodium-zinc imidazolate bridges. Interestingly, the in situ generated dirhodium site with a unique Rh2(esp)2(2-MeIm)1 configuration was able to exhibit obviously enhanced selectivity compared to homogeneous catalyst Rh2(esp)2. Furthermore, the surrounding zinc imidazolate groups could effectively protect the dirhodium moieties from harsh environments, and this ultimately endowed it with high stability.
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Affiliation(s)
- Zhenzhong Li
- Department of Chemistry, Shanghai Normal University, 100 Guilin Rd., Shanghai, 200234, China
| | - Huating Jiang
- Department of Chemistry, Shanghai Normal University, 100 Guilin Rd., Shanghai, 200234, China
| | - Jinxiu Liu
- Department of Chemistry, Shanghai Normal University, 100 Guilin Rd., Shanghai, 200234, China
| | - Tiantian Ning
- Department of Chemistry, Shanghai Normal University, 100 Guilin Rd., Shanghai, 200234, China
| | - Nam T S Phan
- Department of Chemical Engineering, HCMC University of Technology, Vietnam National University System-Ho Chi Minh City (VNU-HCM), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 008428, Vietnam
| | - Fang Zhang
- Department of Chemistry, Shanghai Normal University, 100 Guilin Rd., Shanghai, 200234, China
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8
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Solid State NMR a Powerful Technique for Investigating Sustainable/Renewable Cellulose-Based Materials. Polymers (Basel) 2022; 14:polym14051049. [PMID: 35267872 PMCID: PMC8914817 DOI: 10.3390/polym14051049] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 02/24/2022] [Accepted: 03/02/2022] [Indexed: 01/27/2023] Open
Abstract
Solid state nuclear magnetic resonance (ssNMR) is a powerful and attractive characterization method for obtaining insights into the chemical structure and dynamics of a wide range of materials. Current interest in cellulose-based materials, as sustainable and renewable natural polymer products, requires deep investigation and analysis of the chemical structure, molecular packing, end chain motion, functional modification, and solvent–matrix interactions, which strongly dictate the final product properties and tailor their end applications. In comparison to other spectroscopic techniques, on an atomic level, ssNMR is considered more advanced, especially in the structural analysis of cellulose-based materials; however, due to a dearth in the availability of a broad range of pulse sequences, and time consuming experiments, its capabilities are underestimated. This critical review article presents the comprehensive and up-to-date work done using ssNMR, including the most advanced NMR strategies used to overcome and resolve the structural difficulties present in different types of cellulose-based materials.
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9
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Loreto D, Esposito A, Demitri N, Guaragna A, Merlino A. Reactivity of a fluorine-containing dirhodium tetracarboxylate compound with proteins. Dalton Trans 2022; 51:3695-3705. [PMID: 35166290 DOI: 10.1039/d2dt00082b] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Dirhodium complexes of general formula [Rh2(O2CR)4]L2 are a well-known class of bimetallic compounds that are used as efficient catalysts for a variety of reactions and have been shown to be potent antibacterial and anticancer agents. The catalytic and biological properties of these complexes largely depend on the nature of the bridging carboxylate ligands. Trifluoroacetate (tfa)-containing dirhodium compounds have been used to build artificial metalloenzymes upon reaction with peptides and have been shown to be more cytotoxic than dirhodium tetraacetate. However, there is no structural information on the interaction between these compounds and proteins. Here, cis-Rh2(μ-O2CCH3)2(μ-O2CCF3)2 ([cis-Rh2(OAc)2(tfa)2]) has been synthesized and its reaction with bovine pancreatic ribonuclease (RNase A) and hen egg white lysozyme (HEWL) was analyzed using a combination of different techniques, including Fluorine-19 nuclear magnetic resonance spectroscopy and macromolecular X-ray crystallography, with the aim to unveil the differences in the reactivity of tfa-containing dihrodium complexes with proteins when compared to [Rh2(OAc)4]. [cis-Rh2(OAc)2(tfa)2] and [Rh2(OAc)4] bind the N atoms of His side chains of RNase A at the axial position; however the fluorine-containing compound rapidly loses its tfa ligands, while [Rh2(OAc)4] can retain the acetate ligands upon protein binding. The reactivity of [cis-Rh2(OAc)2(tfa)2] with HEWL is slightly distinct when compared to that of [Rh2(OAc)4] under the same experimental conditions; however, both [cis-Rh2(OAc)2(tfa)2] and [Rh2(OAc)4] degrade when soaked within HEWL crystals. These results provide a structural-based guide for the design of new heterogenous chiral dirhodium/peptide and dirhodium/protein adducts with application in the fields of organic synthesis and asymmetric catalysis.
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Affiliation(s)
- Domenico Loreto
- Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario di Monte Sant'Angelo, via Cinthia 21, 80126 Naples, Italy.
| | - Anna Esposito
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, P.le V. Tecchio 80, 80125 Naples, Italy
| | - Nicola Demitri
- Elettra-Sincrotrone Trieste, S.S. 14 km 163.5 in Area Science Park, 34149 Trieste, Italy
| | - Annalisa Guaragna
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, P.le V. Tecchio 80, 80125 Naples, Italy
| | - Antonello Merlino
- Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario di Monte Sant'Angelo, via Cinthia 21, 80126 Naples, Italy.
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10
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Ikram M, Bashir Z, Haider A, Naz S, Ul-Hamid A, Shahzadi I, Ashfaq A, Haider J, Shahzadi A, Ali S. Bactericidal action and molecular docking studies of catalytic Cu-doped NiO composited with cellulose nanocrystals. Int J Biol Macromol 2022; 195:440-448. [PMID: 34920059 DOI: 10.1016/j.ijbiomac.2021.12.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 10/30/2021] [Accepted: 12/05/2021] [Indexed: 11/26/2022]
Abstract
Synthesis of Cu-doped NiO composited with cellulose nanocrystals (CNC) was carried out by co-precipitation method. The aim of this study is to investigate the catalytic, antibacterial and molecular docking studies of prepared samples. XRD patterns confirmed rhombohedral structure of synthesized nanostructures with gradual increase in crystallite size with doping. The morphology as well as interlayer spacing was evaluated with HRTEM while functional groups presence in dopant-free and doped nanostructures was confirmed using FTIR spectra. Both CNC/NiO composite and Cu-doped CNC/NiO showed higher catalytic potential compared to dopant-free NiO, while Cu-doped CNC/NiO nanostructures exhibited significant potential for use in industrial dye degradation applications. Besides this, CNC/NiO composite showed good antibacterial activity against Escherichia coli (E. coli) bacteria and its bacterial activity increased with Cu doping. Furthermore, molecular docking predictions against dihydrofolate reductase and DNA gyrase enzyme confirmed interaction of NiO NPs, CNC/NiO and Cu-doped CNC/NiO inside active pockets and showed good agreement with in vitro bactericidal activity.
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Affiliation(s)
- Muhammad Ikram
- Solar Cell Applications Research Lab, Department of Physics, Government College University Lahore, Lahore 54000, Punjab, Pakistan.
| | - Zareen Bashir
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University, 14 Ali Road, Lahore, Pakistan
| | - Ali Haider
- Department of Veterinary Medicine, University of Veterinary and Animal Sciences, Lahore 54000, Punjab, Pakistan.
| | - Sadia Naz
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
| | - Anwar Ul-Hamid
- Core Research Facilities, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.
| | - Iram Shahzadi
- College of Pharmacy, University of the Punjab, 54000 Lahore, Pakistan
| | - Atif Ashfaq
- Solar Cell Applications Research Lab, Department of Physics, Government College University Lahore, Lahore 54000, Punjab, Pakistan
| | - Junaid Haider
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
| | - Anum Shahzadi
- Faculty of Pharmacy, University of the Lahore, Lahore, Pakistan
| | - Salamat Ali
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University, 14 Ali Road, Lahore, Pakistan
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11
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Li Z, Rösler L, Wissel T, Breitzke H, Gutmann T, Buntkowsky G. Immobilization of a chiral dirhodium catalyst on SBA-15 via click-chemistry: Application in the asymmetric cyclopropanation of 3-diazooxindole with aryl alkenes. J CO2 UTIL 2021. [DOI: 10.1016/j.jcou.2021.101682] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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12
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Lam E, Hemraz UD. Preparation and Surface Functionalization of Carboxylated Cellulose Nanocrystals. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1641. [PMID: 34206698 PMCID: PMC8306899 DOI: 10.3390/nano11071641] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 06/16/2021] [Accepted: 06/17/2021] [Indexed: 01/31/2023]
Abstract
In recent years, cellulose nanocrystals (CNCs) have emerged as a leading biomass-based nanomaterial owing to their unique functional properties and sustainable resourcing. Sulfated cellulose nanocrystals (sCNCs), produced by sulfuric acid-assisted hydrolysis of cellulose, is currently the predominant form of this class of nanomaterial; its utilization leads the way in terms of CNC commercialization activities and industrial applications. The functional properties, including high crystallinity, colloidal stability, and uniform nanoscale dimensions, can also be attained through carboxylated cellulose nanocrystals (cCNCs). Herein, we review recent progress in methods and feedstock materials for producing cCNCs, describe their functional properties, and discuss the initial successes in their applications. Comparisons are made to sCNCs to highlight some of the inherent advantages that cCNCs may possess in similar applications.
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Affiliation(s)
| | - Usha D. Hemraz
- Aquatic and Crop Resource Development Research Centre, National Research Council of Canada, Montreal, QC H4P 2R2, Canada;
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13
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Pietruschka DS, Kumari B, Buntkowsky G, Gutmann T, Mollenhauer D. Mechanism of Heterogenization of Dirhodium Catalysts: Insights from DFT Calculations. Inorg Chem 2021; 60:6239-6248. [PMID: 33856209 DOI: 10.1021/acs.inorgchem.0c03712] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Dirhodium(II) complexes such as [Rh2(TFA)4] bound to a functionalized mesoporous SBA-15 carrier material have proven to be valuable candidates for heterogeneous catalysis in the field of pharmaceutical synthesis. However, the mechanistic steps of immobilization by linker molecules containing carboxyl or amine functionalities remain the subject of discussion. Here we present a theoretical study of possible mechanistic binding pathways for the [Rh2(TFA)4] complex through model representations of synthetically investigated linkers, namely n-butylamine and n-butyric acid. Experimentally proposed intermediates of the immobilization process are investigated and analyzed by density functional theory calculations to gain insights into structural properties and the influence of solvation. An evaluation of the thermodynamic data for all identified intermediates allowed distinguishing between two possible reaction pathways that are characterized by a first axial complexation of either n-butyric acid or n-butylamine. In agreement with results from NMR spectroscopy, singly or doubly n-butylamine-fixated complexes were found to present possible immobilization products. Initial binding through a carboxy-functionalized linker is proposed as the most favorable reaction pathway for the formation of the mixed linker pattern [Rh2(TFA)3]·(n-butylamine)·(n-butyrate). The linkers n-butyric acid and n-butyrate, respectively, are found to exhibit an unaltered binding affinity to the dirhodium complex despite their protonation states, indicating invariance to the acidic environment unlike an immobilization by n-butylamine. These results present a theoretical framework for the rationalization of observed product distributions while also providing inspiration and guidance for the preparation of functionalized heterogeneous SBA-15/dirhodium catalyst systems.
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Affiliation(s)
- Dennis S Pietruschka
- Physikalisch-Chemisches Institut, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 17, D-35392 Gießen, Germany.,Center for Materials Research (LaMa), Justus-Liebig-Universität, Heinrich-Buff-Ring 16, D-35392 Gießen, Germany
| | - Bharti Kumari
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, D-64287 Darmstadt, Germany
| | - Gerd Buntkowsky
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, D-64287 Darmstadt, Germany
| | - Torsten Gutmann
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, D-64287 Darmstadt, Germany
| | - Doreen Mollenhauer
- Physikalisch-Chemisches Institut, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 17, D-35392 Gießen, Germany.,Center for Materials Research (LaMa), Justus-Liebig-Universität, Heinrich-Buff-Ring 16, D-35392 Gießen, Germany
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14
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Abstract
Nanocellulose (NC) is a biomaterial with growing interest in the field of nanocomposites and sustainable materials. NC has various applications including biodegradable materials, reinforcing agents, packaging films, transpiring membranes and medical devices. Among the many applications, the use of NC functionalized with organic and inorganic groups has found wide use as a catalyst in chemical transformations. The goal of this review is to collect the current knowledge on its catalytic applications for chemical groups conversion. We have chosen to organize the manuscript according to subdivision of NC into Bacterial Nanocellulose (BNC), Cellulose Nanocrystals (CNCs), and Cellulose Nanofibers (CNFs) and their role as inorganic- and organic-functionalized NC-catalysts in organic synthesis. However, in consideration of the fact that the literature on this field is very extensive, we have decided to focus our attention on the scientific productions of the last five years.
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15
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Li Z, Rösler L, Wissel T, Breitzke H, Hofmann K, Limbach HH, Gutmann T, Buntkowsky G. Design and characterization of novel dirhodium coordination polymers – the impact of ligand size on selectivity in asymmetric cyclopropanation. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00109d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Novel dirhodium coordination polymers are synthesized and characterized by various spectroscopic techniques. The catalysts exhibit good stability and excellent catalytic performance and selectivity in the cyclopropanation of diazooxindoles.
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Affiliation(s)
- Zhenzhong Li
- Technical University of Darmstadt
- Institute of Inorganic and Physical Chemistry
- D-64287 Darmstadt
- Germany
| | - Lorenz Rösler
- Technical University of Darmstadt
- Institute of Inorganic and Physical Chemistry
- D-64287 Darmstadt
- Germany
| | - Till Wissel
- Technical University of Darmstadt
- Institute of Inorganic and Physical Chemistry
- D-64287 Darmstadt
- Germany
| | - Hergen Breitzke
- Technical University of Darmstadt
- Institute of Inorganic and Physical Chemistry
- D-64287 Darmstadt
- Germany
| | - Kathrin Hofmann
- Technical University of Darmstadt
- Institute of Inorganic and Physical Chemistry
- D-64287 Darmstadt
- Germany
| | - Hans-Heinrich Limbach
- Free University of Berlin
- Institute of Chemistry and Biochemistry
- D-14195 Berlin
- Germany
| | - Torsten Gutmann
- Technical University of Darmstadt
- Institute of Inorganic and Physical Chemistry
- D-64287 Darmstadt
- Germany
| | - Gerd Buntkowsky
- Technical University of Darmstadt
- Institute of Inorganic and Physical Chemistry
- D-64287 Darmstadt
- Germany
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16
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Co(III)-Salen immobilized cellulose nanocrystals for efficient catalytic CO 2 fixation into cyclic carbonates under mild conditions. Carbohydr Polym 2020; 256:117558. [PMID: 33483060 DOI: 10.1016/j.carbpol.2020.117558] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 12/16/2020] [Accepted: 12/18/2020] [Indexed: 12/25/2022]
Abstract
Searching for green, recyclable and highly efficient catalyst for the synthesis of cyclic carbonates from CO2 is of great importance because it is profitable for reducing the greenhouse effects and meets the principles of green chemistry. Herein, a series of cellulose nanocrystals, either the pristine or modified ones (TEMPO oxidized and Co(III)salen immobilized), were explored as catalysts for cycloaddition of epoxides and carbon dioxide. The impact of surface properties on the performance of the as-made catalysts was investigated. Co(III)-salen grafted cellulose nanocrystals was proven to be the most effective catalyst in this study, which could afford excellent yield up to 99 % after 24 h even under low CO2 pressures of 0.1 MPa. They can be easily recovered and reused for at least 4 times, demonstrating their excellent stability. We found that the surface functional groups such as enriched sulfate or carboxylic groups could also account for the enhanced catalytic activity. This work highlights the applications of green and sustainable nanoparticles in a cycloaddition reaction and offers a sustainable solution in industrial catalysis related to CO2 conversions.
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17
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Wang X, Xu D, Jaquet B, Yang Y, Wang J, Huang H, Chen Y, Gerhard C, Zhang K. Structural Colors by Synergistic Birefringence and Surface Plasmon Resonance. ACS NANO 2020; 14:16832-16839. [PMID: 33290653 DOI: 10.1021/acsnano.0c05599] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
One-dimensional nanomaterials including cellulose nanocrystals (CNCs) and gold nanorods (GNRs) are widely used in optical materials due to their respective inherent features: birefringence with accompanying light retardation and surface plasmon resonance (SPR). Herein, we successfully combine these properties of both nanorods to generate synergistic and readily tunable structural colors in hybrid composite polymer films. CNCs and GNRs are embedded either in the same or in separate films after unidirectional alignment in dynamic hydrogels. By synergistically leveraging CNCs and GNRs with diverse amounts in hybrid films or stacked separate films, wide-ranging structural colors are obtained, far beyond those from films solely with aligned CNCs or GNRs. Higher GNR contents enhance light absorption at 520 nm with promoted magenta colors, while more CNCs affect the overall phase retardation with light absorption between 400 and 700 nm between crossed polarizers. Moreover, adjusting the angles between films solely with CNCs or GNRs via a stacking/rotating technique successively manipulates colors with flexible film combinations. By rotating the films with aligned GNRs (0-180°), light absorption can traverse from ∼500 to 650 nm. Thus, tuning the adjustable synergism of birefringence of CNCs and SPR of GNRs provides great potential for structural colors, which enlightens inspirations for designing functional optical materials.
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Affiliation(s)
- Xiaojie Wang
- Wood Technology and Wood Chemistry, Department of Wood Technology and Wood-based Composites, Georg-August-University of Göttingen, Büsgenweg 4, D-37077 Göttingen, Germany
| | - Dan Xu
- Wood Technology and Wood Chemistry, Department of Wood Technology and Wood-based Composites, Georg-August-University of Göttingen, Büsgenweg 4, D-37077 Göttingen, Germany
| | - Bea Jaquet
- Faculty of Engineering and Health, University of Applied Sciences and Arts, Von-Ossietzky-Straße 99, 37085 Göttingen, Germany
| | - Yang Yang
- Wood Technology and Wood Chemistry, Department of Wood Technology and Wood-based Composites, Georg-August-University of Göttingen, Büsgenweg 4, D-37077 Göttingen, Germany
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, People's Republic of China
| | - Jiaxiu Wang
- Wood Technology and Wood Chemistry, Department of Wood Technology and Wood-based Composites, Georg-August-University of Göttingen, Büsgenweg 4, D-37077 Göttingen, Germany
| | - Heqin Huang
- Wood Technology and Wood Chemistry, Department of Wood Technology and Wood-based Composites, Georg-August-University of Göttingen, Büsgenweg 4, D-37077 Göttingen, Germany
| | - Ye Chen
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, People's Republic of China
| | - Christoph Gerhard
- Faculty of Engineering and Health, University of Applied Sciences and Arts, Von-Ossietzky-Straße 99, 37085 Göttingen, Germany
| | - Kai Zhang
- Wood Technology and Wood Chemistry, Department of Wood Technology and Wood-based Composites, Georg-August-University of Göttingen, Büsgenweg 4, D-37077 Göttingen, Germany
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18
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Riva L, Punta C, Sacchetti A. Co‐Polymeric Nanosponges from Cellulose Biomass as Heterogeneous Catalysts for amine‐catalyzed Organic Reactions. ChemCatChem 2020. [DOI: 10.1002/cctc.202001157] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Laura Riva
- Department of Chemistry Materials and Chemical Engineering “Giulio Natta” Politecnico di Milano 20131 Milano Italy
| | - Carlo Punta
- Department of Chemistry Materials and Chemical Engineering “Giulio Natta” Politecnico di Milano 20131 Milano Italy
- C. N. R. Istituto di Chimica del Riconoscimento Molecolare (ICRM) 20131 Milano Italy
| | - Alessandro Sacchetti
- Department of Chemistry Materials and Chemical Engineering “Giulio Natta” Politecnico di Milano 20131 Milano Italy
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19
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Li Z, Rösler L, Herr K, Brodrecht M, Breitzke H, Hofmann K, Limbach HH, Gutmann T, Buntkowsky G. Dirhodium Coordination Polymers for Asymmetric Cyclopropanation of Diazooxindoles with Olefins: Synthesis and Spectroscopic Analysis. Chempluschem 2020; 85:1737-1746. [PMID: 32790226 DOI: 10.1002/cplu.202000421] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/22/2020] [Indexed: 12/30/2022]
Abstract
A facile approach is reported for the preparation of dirhodium coordination polymers [Rh2 (L1)2 ]n (Rh2 -L1) and [Rh2 (L2)2 ]n (Rh2 -L2; L1=N,N'-(pyromellitoyl)-bis-L-phenylalanine diacid anion, L2=bis-N,N'-(L-phenylalanyl) naphthalene-1,4,5,8-tetracarboxylate diimide) from chiral dicarboxylic acids by ligand exchange. Multiple techniques including FTIR, XPS, and 1 H→13 C CP MAS NMR spectroscopy reveal the formation of the coordination polymers. 19 F MAS NMR was utilized to investigate the remaining TFA groups in the obtained coordination polymers, and demonstrated near-quantitative ligand exchange. DR-UV-vis and XPS confirm the oxidation state of the Rh center and that the Rh-single bond in the dirhodium node is maintained in the synthesis of Rh2 -L1 and Rh2 -L2. Both coordination polymers exhibit excellent catalytic performance in the asymmetric cyclopropanation reaction between styrene and diazooxindole. The catalysts can be easily recycled and reused without significant reduction in their catalytic efficiency.
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Affiliation(s)
- Zhenzhong Li
- Technical University of Darmstadt, Institute of Inorganic and Physical Chemistry, Alarich-Weiss-Straße 8, 64287, Darmstadt, Germany
| | - Lorenz Rösler
- Technical University of Darmstadt, Institute of Inorganic and Physical Chemistry, Alarich-Weiss-Straße 8, 64287, Darmstadt, Germany
| | - Kevin Herr
- Technical University of Darmstadt, Institute of Inorganic and Physical Chemistry, Alarich-Weiss-Straße 8, 64287, Darmstadt, Germany
| | - Martin Brodrecht
- Technical University of Darmstadt, Institute of Inorganic and Physical Chemistry, Alarich-Weiss-Straße 8, 64287, Darmstadt, Germany
| | - Hergen Breitzke
- Technical University of Darmstadt, Institute of Inorganic and Physical Chemistry, Alarich-Weiss-Straße 8, 64287, Darmstadt, Germany
| | - Kathrin Hofmann
- Technical University of Darmstadt, Institute of Inorganic and Physical Chemistry, Alarich-Weiss-Straße 8, 64287, Darmstadt, Germany
| | - Hans-Heinrich Limbach
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Takustraße 3, 14195, Berlin, Germany
| | - Torsten Gutmann
- Technical University of Darmstadt, Institute of Inorganic and Physical Chemistry, Alarich-Weiss-Straße 8, 64287, Darmstadt, Germany.,University Kassel, Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology, Heinrich-Plett-Straße 40, D-34132, Kassel, Germany
| | - Gerd Buntkowsky
- Technical University of Darmstadt, Institute of Inorganic and Physical Chemistry, Alarich-Weiss-Straße 8, 64287, Darmstadt, Germany
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20
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Dokhaee Z, Ghiaci M, Farrokhpour H, Buntkowsky G, Breitzke H. SBA-15-Supported Imidazolium Ionic Liquid through Different Linkers as a Sustainable Catalyst for the Synthesis of Cyclic Carbonates: A Kinetic Study and Theoretical DFT Calculations. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c01050] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Zohre Dokhaee
- Department of Chemistry, Isfahan University of Technology, Isfahan 8415683111, Iran
| | - Mehran Ghiaci
- Department of Chemistry, Isfahan University of Technology, Isfahan 8415683111, Iran
| | - Hossein Farrokhpour
- Department of Chemistry, Isfahan University of Technology, Isfahan 8415683111, Iran
| | - Gerd Buntkowsky
- Eduard-Zintl-Institut, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, Darmstadt 64287, Germany
| | - Hergen Breitzke
- Eduard-Zintl-Institut, Technische Universität Darmstadt, Alarich-Weiss-Str. 8, Darmstadt 64287, Germany
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21
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Aziz T, Fan H, Zhang X, Haq F, Ullah A, Ullah R, Khan FU, Iqbal M. Advance Study of Cellulose Nanocrystals Properties and Applications. JOURNAL OF POLYMERS AND THE ENVIRONMENT 2020; 28:1117-1128. [DOI: 10.1007/s10924-020-01674-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
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22
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Valiey E, Dekamin MG, Alirezvani Z. Melamine-modified chitosan materials: An efficient and recyclable bifunctional organocatalyst for green synthesis of densely functionalized bioactive dihydropyrano[2,3-c]pyrazole and benzylpyrazolyl coumarin derivatives. Int J Biol Macromol 2019; 129:407-421. [DOI: 10.1016/j.ijbiomac.2019.01.027] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Revised: 12/28/2018] [Accepted: 01/05/2019] [Indexed: 01/06/2023]
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23
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Huang H, Wang X, Yu J, Chen Y, Ji H, Zhang Y, Rehfeldt F, Wang Y, Zhang K. Liquid-Behaviors-Assisted Fabrication of Multidimensional Birefringent Materials from Dynamic Hybrid Hydrogels. ACS NANO 2019; 13:3867-3874. [PMID: 30811180 DOI: 10.1021/acsnano.9b00551] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Liquid-solid transition is a widely used strategy to shape polymeric materials and encode their microstructures. However, it is still challenging to fully exploit liquid behaviors of material precursors. In particular, the dynamic and static liquid behaviors naturally conflict with each other, which makes it difficult to integrate their advantages in the same materials. Here, by utilizing a shear-thinning phenomenon in the dynamic hybrid hydrogels, we achieve a hydrodynamic alignment of cellulose nanocrystals (CNC) and preserve it in the relaxed hydrogel networks due to the much faster relaxation of polymer networks (within 500 s) than CNC after the unloading of external force. During the following drying process, the surface tension of hydrogels further enhances the orientation index of CNC up to 0.872 in confined geometry, and these anisotropic microstructures demonstrate highly tunable birefringence (up to 0.004 14). Due to the presence of the boundaries of dynamic hydrogels, diverse xerogels including fibers, films, and even complex three-dimensional structures with variable anisotropic microstructures can be fabricated without any external molds.
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Affiliation(s)
- Heqin Huang
- Wood Technology and Wood Chemistry , University of Goettingen , Büsgenweg 4 , D-37077 Göttingen , Germany
| | - Xiaojie Wang
- Wood Technology and Wood Chemistry , University of Goettingen , Büsgenweg 4 , D-37077 Göttingen , Germany
| | - Jinchao Yu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering , Donghua University , Shanghai 201620 , People's Republic of China
- College of Textile and Clothing Engineering , Soochow University , Suzhou 215123 , People's Republic of China
| | - Ye Chen
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering , Donghua University , Shanghai 201620 , People's Republic of China
| | - Hong Ji
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering , Donghua University , Shanghai 201620 , People's Republic of China
| | - Yumei Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering , Donghua University , Shanghai 201620 , People's Republic of China
| | - Florian Rehfeldt
- Third Institute of Physics - Biophysics, Faculty of Physics , University of Goettingen , Friedrich-Hund-Platz 1 , D-37077 Göttingen , Germany
| | - Yong Wang
- Laboratory for Fluid Physics, Pattern Formation and Biocomplexity , Max Planck Institute for Dynamics and Self-Organization , Am Fassberg 17 , D-37077 Göttingen , Germany
| | - Kai Zhang
- Wood Technology and Wood Chemistry , University of Goettingen , Büsgenweg 4 , D-37077 Göttingen , Germany
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24
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Beyki MH, Ghasemi MH. Quaternized γ-Fe2O3@cellulose ionomer: An efficient recyclable catalyst for Michael-type addition reaction. Int J Biol Macromol 2018. [DOI: 10.1016/j.ijbiomac.2018.03.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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25
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AgBr and AgCl nanoparticle doped TEMPO-oxidized microfiber cellulose as a starting material for antimicrobial filter. Carbohydr Polym 2018; 191:266-279. [DOI: 10.1016/j.carbpol.2018.03.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 03/08/2018] [Accepted: 03/08/2018] [Indexed: 02/07/2023]
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26
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Sanchez-Botero L, Dimov AV, Li R, Smilgies DM, Hinestroza JP. In Situ and Real-Time Studies, via Synchrotron X-ray Scattering, of the Orientational Order of Cellulose Nanocrystals during Solution Shearing. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:5263-5272. [PMID: 29641208 DOI: 10.1021/acs.langmuir.7b04403] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
In this manuscript, we report on the ordering of the cellulose nanocrystals (CNCs) as they experience shear forces during the casting process. To achieve these measurements, in situ and in real time, we used synchrotron-based grazing incidence wide-angle X-ray scattering (GIWAX). We believe that the GIWAX technique, although not commonly used to probe these types of phenomena, can open new avenues to gain deeper insights into film formation processes and surface-driven phenomena. In particular, we investigated the influence of solution concentration, shear-cast velocity, and drying temperature on the ordering of cellulose nanocrystals (CNCs) using GIWAXS. The films were prepared from aqueous suspensions of cellulose nanocrystals at two concentration values (7 and 9 wt %). As the films were cast, the X-ray beam was focused on a fixed position and GIWAXS patterns were recorded at regular time intervals. Structural characterization of the dry films was carried out via polarized optical microscopy and scanning electron microscopy. In addition, a rheological study of the CNC suspensions was performed. Our results show that the morphology of the CNC films was significantly influenced by shear velocity, concentration of the precursor suspension, and evaporation temperature. In contrast, we observed that the orientation parameter of the films was not significantly affected. The scattering intensity of the peak (200) was analyzed as a function of time, following a sigmoidal profile, hence indicating short- and long-range interactions within the anisotropic domains as they reached their final orientation state. A model capable of describing the resulting film morphologies is also proposed. The results and analysis presented in this manuscript provide new insights into the controlled alignment of cellulose nanocrystals under shear. This controlled alignment has significant implications in the development of advanced coatings and films currently used in a myriad of applications, such as catalysis, optics, electronics, and biomedicine.
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Affiliation(s)
| | | | - Ruipeng Li
- Cornell High Energy Synchrotron Source (CHESS) , Ithaca , New York 14853 , United States
| | - Detlef-M Smilgies
- Cornell High Energy Synchrotron Source (CHESS) , Ithaca , New York 14853 , United States
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27
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Chen L, Leslie D, Coleman MG, Mack J. Recyclable heterogeneous metal foil-catalyzed cyclopropenation of alkynes and diazoacetates under solvent-free mechanochemical reaction conditions. Chem Sci 2018; 9:4650-4661. [PMID: 29899959 PMCID: PMC5969500 DOI: 10.1039/c8sc00443a] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Accepted: 04/19/2018] [Indexed: 01/07/2023] Open
Abstract
Silver and copper foil were found to be effective, versatile and selective heterogeneous catalysts for the cyclopropenation of terminal and internal alkynes under mechanochemical reaction conditions.
Silver and copper foil were found to be effective, versatile and selective heterogeneous catalysts for the cyclopropenation of terminal and internal alkynes under mechanochemical reaction conditions. This methodology enables the functionalization of a wide range of terminal or internal alkynes under ambient, aerobic, and solvent-free conditions. Finally, we have demonstrated a unique and versatile one-pot domino Sonogashira-cyclopropenation mechanochemical reaction for the formation of complex cyclopropenes.
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Affiliation(s)
- Longrui Chen
- Department of Chemistry , University of Cincinnati , Cincinnati , Ohio 45221-0037 , USA .
| | - Devonna Leslie
- School of Chemistry and Materials Science , Rochester Institute of Technology , Rochester , New York 14623-5604 , USA .
| | - Michael G Coleman
- School of Chemistry and Materials Science , Rochester Institute of Technology , Rochester , New York 14623-5604 , USA .
| | - James Mack
- Department of Chemistry , University of Cincinnati , Cincinnati , Ohio 45221-0037 , USA .
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28
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Duan C, Meng J, Wang X, Meng X, Sun X, Xu Y, Zhao W, Ni Y. Synthesis of novel cellulose- based antibacterial composites of Ag nanoparticles@ metal-organic frameworks@ carboxymethylated fibers. Carbohydr Polym 2018; 193:82-88. [PMID: 29773400 DOI: 10.1016/j.carbpol.2018.03.089] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 02/25/2018] [Accepted: 03/24/2018] [Indexed: 12/16/2022]
Abstract
A novel cellulose-based antibacterial material, namely silver nanoparticles@ metal-organic frameworks@ carboxymethylated fibers composites (Ag NPs@ HKUST-1@ CFs), was synthesized. The results showed that the metal-organic frameworks (HKUST-1) were uniformly anchored on the fiber's surfaces by virtue of complexation between copper ions in HKUST-1 and carboxyl groups on the carboxymethylated fibers (CFs). The silver nanoparticles (Ag NPs) were immobilized and well-dispersed into the pores and/or onto the surfaces of HKUST-1 via in situ microwave reduction, resulting in the formation of novel Ag NPs@ HKUST-1@ CFs composites. The antibacterial assays showed that the as-prepared composites exhibited a much higher antibacterial activity than Ag NPs@ CFs or HKUST-1@ CFs samples.
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Affiliation(s)
- Chao Duan
- College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science and Technology, Xi'an, 710021, China; Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Qilu University of Technology, Jinan, 250353, China.
| | - Jingru Meng
- College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science and Technology, Xi'an, 710021, China
| | - Xinqi Wang
- College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science and Technology, Xi'an, 710021, China
| | - Xin Meng
- College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science and Technology, Xi'an, 710021, China
| | - Xiaole Sun
- College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science and Technology, Xi'an, 710021, China
| | - Yongjian Xu
- College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science and Technology, Xi'an, 710021, China
| | - Wei Zhao
- College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science and Technology, Xi'an, 710021, China
| | - Yonghao Ni
- College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science and Technology, Xi'an, 710021, China; Limerick Pulp and Paper Centre, University of New Brunswick, Fredericton, New Brunswick, E3 B 5A3, Canada.
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29
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Xie S, Zhang X, Walcott MP, Lin H. Applications of Cellulose Nanocrystals: A Review. ACTA ACUST UNITED AC 2018. [DOI: 10.30919/es.1803302] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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30
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Liu J, Xu Y, Groszewicz PB, Brodrecht M, Fasel C, Hofmann K, Tan X, Gutmann T, Buntkowsky G. Novel dirhodium coordination polymers: the impact of side chains on cyclopropanation. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01493k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Seven novel dirhodium coordination polymers (Rh2–Ln) (n = 1–7) are prepared by employing bitopic ligands to connect dirhodium nodes.
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Affiliation(s)
- Jiquan Liu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry
- College of Chemistry and Materials Science
- Northwest University
- 710127 Xi'an
- P. R. China
| | - Yeping Xu
- Eduard-Zintl-Institute for Inorganic Chemistry and Physical Chemistry
- Technical University Darmstadt
- 64287 Darmstadt
- Germany
| | - Pedro B. Groszewicz
- Eduard-Zintl-Institute for Inorganic Chemistry and Physical Chemistry
- Technical University Darmstadt
- 64287 Darmstadt
- Germany
| | - Martin Brodrecht
- Eduard-Zintl-Institute for Inorganic Chemistry and Physical Chemistry
- Technical University Darmstadt
- 64287 Darmstadt
- Germany
| | - Claudia Fasel
- FB Material- und Geowissenschaften
- Technical University Darmstadt
- 64287 Darmstadt
- Germany
| | - Kathrin Hofmann
- Eduard-Zintl-Institute for Inorganic Chemistry and Physical Chemistry
- Technical University Darmstadt
- 64287 Darmstadt
- Germany
| | - Xijuan Tan
- Laboratory of Mineralization and Dynamics
- College of Earth Sciences and Land Resources
- Chang'an University
- 710054 Xi'an
- P. R. China
| | - Torsten Gutmann
- Eduard-Zintl-Institute for Inorganic Chemistry and Physical Chemistry
- Technical University Darmstadt
- 64287 Darmstadt
- Germany
| | - Gerd Buntkowsky
- Eduard-Zintl-Institute for Inorganic Chemistry and Physical Chemistry
- Technical University Darmstadt
- 64287 Darmstadt
- Germany
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31
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Copéret C, Liao WC, Gordon CP, Ong TC. Active Sites in Supported Single-Site Catalysts: An NMR Perspective. J Am Chem Soc 2017; 139:10588-10596. [DOI: 10.1021/jacs.6b12981] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Christophe Copéret
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Wei-Chih Liao
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Christopher P. Gordon
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Ta-Chung Ong
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
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32
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Cellulose nanocrystal/hexadecyltrimethylammonium bromide/silver nanoparticle composite as a catalyst for reduction of 4-nitrophenol. Carbohydr Polym 2017; 156:253-258. [DOI: 10.1016/j.carbpol.2016.08.099] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 08/27/2016] [Accepted: 08/30/2016] [Indexed: 11/20/2022]
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33
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The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2015. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.08.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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34
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Functionalization of Cellulose Nanocrystals in Choline Lactate Ionic Liquid. MATERIALS 2016; 9:ma9070499. [PMID: 28773623 PMCID: PMC5456852 DOI: 10.3390/ma9070499] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 06/15/2016] [Accepted: 06/20/2016] [Indexed: 11/16/2022]
Abstract
Cellulose nanocrystals (CNCs) are valuable nanomaterials obtained from renewable resources. Their properties make them suitable for a wide range of applications, including polymer reinforcement. However, due to their highly hydrophilic character, it is necessary to modify their surface with non-polar functional groups before their incorporation into a hydrophobic polymer matrix. In this work, cellulose nanocrystals were modified using a silane coupling agent and choline lactate, an ionic liquid derived from renewable resources, as a reaction medium. Modified cellulose nanocrystals were characterized by infrared spectroscopy, showing new peaks associated to the modification performed. X-ray diffraction was used to analyze the crystalline structure of functionalized cellulose nanocrystals and to optimize the amount of silane for functionalization. Poly(lactic acid) (PLA) nanocomposites containing 1 wt % of functionalized cellulose nanocrystals were prepared. They were characterized by field-emission scanning electron microscopy (FE-SEM) and mechanical tests. The use of choline lactate as reaction media has been shown to be an alternative method for the dispersion and silanization of the cellulose nanocrystals without the addition of an external catalyst.
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Liu J, Fasel C, Braga-Groszewicz P, Rothermel N, Lilly Thankamony AS, Sauer G, Xu Y, Gutmann T, Buntkowsky G. Heterogeneous self-supported dirhodium(ii) catalysts with high catalytic efficiency in cyclopropanation – a structural study. Catal Sci Technol 2016. [DOI: 10.1039/c6cy00915h] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Catalytically active dirhodium sheet-like coordination polymers are synthesized from their precursors via ligand exchange.
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Affiliation(s)
- Jiquan Liu
- Eduard-Zintl-Institute for Inorganic Chemistry and Physical Chemistry
- Technical University Darmstadt
- D-64287 Darmstadt
- Germany
| | - Claudia Fasel
- FB Material- und Geowissenschaften
- Technical University Darmstadt
- 64287 Darmstadt
- Germany
| | - Pedro Braga-Groszewicz
- Eduard-Zintl-Institute for Inorganic Chemistry and Physical Chemistry
- Technical University Darmstadt
- D-64287 Darmstadt
- Germany
| | - Niels Rothermel
- Eduard-Zintl-Institute for Inorganic Chemistry and Physical Chemistry
- Technical University Darmstadt
- D-64287 Darmstadt
- Germany
| | - Aany Sofia Lilly Thankamony
- Eduard-Zintl-Institute for Inorganic Chemistry and Physical Chemistry
- Technical University Darmstadt
- D-64287 Darmstadt
- Germany
| | - Grit Sauer
- Eduard-Zintl-Institute for Inorganic Chemistry and Physical Chemistry
- Technical University Darmstadt
- D-64287 Darmstadt
- Germany
| | - Yeping Xu
- Eduard-Zintl-Institute for Inorganic Chemistry and Physical Chemistry
- Technical University Darmstadt
- D-64287 Darmstadt
- Germany
| | - Torsten Gutmann
- Eduard-Zintl-Institute for Inorganic Chemistry and Physical Chemistry
- Technical University Darmstadt
- D-64287 Darmstadt
- Germany
| | - Gerd Buntkowsky
- Eduard-Zintl-Institute for Inorganic Chemistry and Physical Chemistry
- Technical University Darmstadt
- D-64287 Darmstadt
- Germany
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