1
|
Adams F. Merging σ-Bond Metathesis with Polymerization Catalysis: Insights into Rare-Earth Metal Complexes, End-Group Functionalization, and Application Prospects. Macromol Rapid Commun 2024:e2400122. [PMID: 38831565 DOI: 10.1002/marc.202400122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 05/15/2024] [Indexed: 06/05/2024]
Abstract
Polymers with well-defined structures, synthesized through metal-catalyzed processes, and having end groups exhibiting different polarity and reactivity than the backbone, are gaining considerable attention in both scientific and industrial communities. These polymers show potential applications as fundamental building blocks and additives in the creation of innovative functional materials. Investigations are directed toward identifying the most optimal and uncomplicated synthetic approach by employing a combination of living coordination polymerization mediated by rare-earth metal complexes and C-H bond activation reaction by σ-bond metathesis. This combination directly yields catalysts with diverse functional groups from a single precursor, enabling the production of terminal-functionalized polymers without the need for sequential reactions, such as termination reactions. The utilization of this innovative methodology allows for precise control over end-group functionalities, providing a versatile approach to tailor the properties and applications of the resulting polymers. This perspective discusses the principles, challenges, and potential advancements associated with this synthetic strategy, highlighting its significance in advancing the interface of metalorganic chemistry, polymer chemistry, and materials science.
Collapse
Affiliation(s)
- Friederike Adams
- Institute of Polymer Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
- University Eye Hospital Tübingen, Elfriede-Aulhorn-Strasse 7, 72076, Tübingen, Germany
| |
Collapse
|
2
|
Ma J, Wang L, Qiao A, Li Z, Zhao F, Wu J. Synthesis of alkenylphosphine oxides via Tf 2O promoted addition-elimination of ketones and secondary phosphine oxides. Org Biomol Chem 2024; 22:3592-3596. [PMID: 38624160 DOI: 10.1039/d4ob00318g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
Herein, we describe an efficient method for the synthesis of alkenylphosphine oxides via a Tf2O promoted addition-elimination process. Various diarylphosphine oxides and alkylarylphosphine oxides react with ketones smoothly and produce alkenylphosphine oxides in moderate to excellent yields with abundant functional group compatibility. In addition, several transformations and applications of the product also demonstrate the potential value of the methodology.
Collapse
Affiliation(s)
- Jiangkai Ma
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China.
| | - Lianjie Wang
- High & New Technology Research Center, Henan Academy of Sciences, Zhengzhou 450002, P. R. China
| | - Anjiang Qiao
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China.
| | - Zhongxian Li
- High & New Technology Research Center, Henan Academy of Sciences, Zhengzhou 450002, P. R. China
| | - Fengqian Zhao
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China.
| | - Junliang Wu
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China.
| |
Collapse
|
3
|
Tang Y, Chen H, Chen Y, Chen J, Luo Y. Rare-Earth Metal Complexes Supported by A Tridentate Amidinate Ligand: Synthesis, Characterization, and Catalytic Comparison in Isoprene Polymerization. Inorg Chem 2024; 63:7848-7857. [PMID: 38635372 DOI: 10.1021/acs.inorgchem.4c00488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
To systematically investigate the dependence of the initiating group and metal size on polymerization performance, a family of rare-earth metal bis(alkyl)/bis(benzyl)/bis(amide) complexes supported by a monoanionic tridentate amidinate ligand [(2,6-iPr2C6H3)NC(Ph)N(C6H4-2-OMe]- (HL) were synthesized and well-characterized. Treatment of rare-earth metal tris(alkyl)/tris(benzyl)/tris(amide) complexes Y(CH2C6H4NMe2-o)3 or Y(CH2SiMe3)3(THF)2 or Ln[N(SiHMe2)2]3(THF)x (Ln = Sc, x = 1; Ln = Y, La, Sm, Lu, x = 2) with 1 equiv of HL gave the corresponding mono(amidinate) rare-earth metal bis(alkyl)/bis(benzyl)/bis(amide) complexes [(2,6-iPr2C6H4)NC(Ph)N(C6H4-2-OMe)]Y(CH2C6H4NMe2-o)2 (1), [(2,6-iPr2C6H4)NC(Ph)N(C6H4-2-OMe)]Y(CH2SiMe3)2(THF) (2), and [(2,6-iPr2C6H4)NC(Ph)N(C6H4-2-OMe)]Ln[N(SiHMe2)2]2(THF)n (Ln = Y, n = 1 (3); Ln = La, n = 1 (4); Ln = Sc, n = 0 (5); Ln = Lu, n = 0 (6); Ln = Sm, n = 0 (7)) in good isolated yields. These complexes were characterized by elemental analysis, NMR spectroscopy, and single-crystal X-ray diffraction. In the presence of excess AlMe3 and on treatment with 1 equiv of [Ph3C][B(C6F5)4], these complexes could serve as precatalysts for cationic polymerization of isoprene, in which the dependence of the polymerization activity and regioselectivity on the initiating group and metal size was observed.
Collapse
Affiliation(s)
- Yue Tang
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, P. R. China
| | - Haonan Chen
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, P. R. China
| | - Yanjun Chen
- Ningbo Polytechnic, Ningbo 315800, P. R. China
| | - Jue Chen
- School of Biological and Chemical Engineering, NingboTech University, Ningbo 315100, P. R. China
| | - Yunjie Luo
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, P. R. China
| |
Collapse
|
4
|
Saptal VB, Ranjan P, Zbořil R, Nowicki M, Walkowiak J. Magnetically Recyclable Borane Lewis Acid Catalyst for Hydrosilylation of Imines and Reductive Amination of Carbonyls. CHEMSUSCHEM 2024:e202400058. [PMID: 38630961 DOI: 10.1002/cssc.202400058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 04/05/2024] [Accepted: 04/15/2024] [Indexed: 04/19/2024]
Abstract
Fluorinated arylborane-based Lewis acid catalysts have shown remarkable activity and serve as ideal examples of transition metal-free catalysts for diverse organic transformations. However, their homogeneous nature poses challenges in terms of recyclability and separation from reaction mixtures. This work presents an efficient technique for the heterogenization of boron Lewis acid catalysts by anchoring Piers' borane to allyl-functionalized iron oxide. This catalyst demonstrates excellent activity in the hydrosilylation of imines and the reductive amination of carbonyls using various silanes as reducing agents under mild reaction conditions. The catalyst exhibits broad tolerance towards a wide range of functional substrates. Furthermore, it exhibits good recyclability and can be easily separated from the products using an external magnetic field. This work represents a significant advance in the development of sustainable heterogenous metal-free catalysts for organic transformations.
Collapse
Affiliation(s)
- Vitthal B Saptal
- Center for Advanced Technology, Adam Mickiewicz University, Uniwersytetu Poznanskiego Poznań, 10, 61-614, Poznan, Poland
| | - Prabodh Ranjan
- Department of Chemistry, Indian Institute of Technology, Kanpur, India, 208016
| | - Radek Zbořil
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, CATRIN), Palacký University Olomouc, Šlechtitelů 27, 779 00, Olomouc, Czech Republic
- CEET, Nanotechnology Centre, VSB-Technical University of Ostrava, 17. listopadu 2172/15, 708 00, Ostrava-Poruba, Czech Republic
| | - Marek Nowicki
- Center for Advanced Technology, Adam Mickiewicz University, Uniwersytetu Poznanskiego Poznań, 10, 61-614, Poznan, Poland
- Institute of Physics, Faculty of Materials Engineering and Technical Physics, Poznan University of Technology, Piotrowo 3, 60-965, Poznan, Poland
| | - Jędrzej Walkowiak
- Center for Advanced Technology, Adam Mickiewicz University, Uniwersytetu Poznanskiego Poznań, 10, 61-614, Poznan, Poland
| |
Collapse
|
5
|
Weingarten P, Thomas SR, Luiza de Andrade Querino A, Halama K, Kränzlein M, Casini A, Rieger B. A graft-to strategy of poly(vinylphosphonates) on dopazide-coated gold nanoparticles using in situ catalyst activation. RSC Adv 2024; 14:8145-8149. [PMID: 38464693 PMCID: PMC10921843 DOI: 10.1039/d4ra01116c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Accepted: 03/04/2024] [Indexed: 03/12/2024] Open
Abstract
A modular synthetic pathway for poly(diethyl vinylphosphonates) grafting-to gold nanoparticles is presented. Utilising an azide-dopamine derivative as nanoparticle coating agent, alkyne-azide click conditions were used to covalently tether the polymer to gold nanoparticles leading to stable and well distributed colloids for different applications.
Collapse
Affiliation(s)
- Philipp Weingarten
- WACKER-Chair of Macromolecular Chemistry, Catalysis Research Center, School of Natural Sciences, Department of Chemistry, Technical University of Munich Lichtenbergstraße 4 D-85748 Garching b. München Germany
| | - Sophie R Thomas
- Chair of Medicinal and Bioinorganic Chemistry, Department of Chemistry, School of Natural Sciences, Technical University of Munich Lichtenbergstraße 4 D-85748 Garching b. München Germany
| | - Ana Luiza de Andrade Querino
- Chair of Medicinal and Bioinorganic Chemistry, Department of Chemistry, School of Natural Sciences, Technical University of Munich Lichtenbergstraße 4 D-85748 Garching b. München Germany
- Department of Chemistry, Universidade Federal de Minas Gerais Belo Horizonte MG 31270-901 Brazil
| | - Kerstin Halama
- WACKER-Chair of Macromolecular Chemistry, Catalysis Research Center, School of Natural Sciences, Department of Chemistry, Technical University of Munich Lichtenbergstraße 4 D-85748 Garching b. München Germany
| | - Moritz Kränzlein
- WACKER-Chair of Macromolecular Chemistry, Catalysis Research Center, School of Natural Sciences, Department of Chemistry, Technical University of Munich Lichtenbergstraße 4 D-85748 Garching b. München Germany
| | - Angela Casini
- Chair of Medicinal and Bioinorganic Chemistry, Department of Chemistry, School of Natural Sciences, Technical University of Munich Lichtenbergstraße 4 D-85748 Garching b. München Germany
| | - Bernhard Rieger
- WACKER-Chair of Macromolecular Chemistry, Catalysis Research Center, School of Natural Sciences, Department of Chemistry, Technical University of Munich Lichtenbergstraße 4 D-85748 Garching b. München Germany
| |
Collapse
|
6
|
Jerca FA, Muntean C, Remaut K, Jerca VV, Raemdonck K, Hoogenboom R. Cationic amino-acid functionalized polymethacrylamide vectors for siRNA transfection based on modification of poly(2-isopropenyl-2-oxazoline). J Control Release 2023; 364:687-699. [PMID: 37935258 DOI: 10.1016/j.jconrel.2023.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 11/01/2023] [Accepted: 11/02/2023] [Indexed: 11/09/2023]
Abstract
Poly(2-isopropenyl-2-oxazoline) (PiPOx) is a functional polymer showing great potential for the development of smart biomaterials. The straightforward synthesis and post-polymerization functionalization of PiPOx offers many opportunities for tailoring the properties of the polymer towards biomaterials. In this study we report for the first time PiPOx-based cationic charged polymethacrylamides with amino acid side chains that can complex siRNA and promote transfection in vitro. Therefore, PiPOx was fully modified via ring opening addition reactions with the carboxylic acid groups of a series of N-Boc-L-amino acids and their reaction kinetics were investigated. Based on the determined kinetic constants, another series of PiPOx-based copolymers with balanced hydrophilic/hydrophobic content of N-Boc-L-amino acids were obtained via one-pot modification reaction with two different N-Boc-L-amino acids. The N-Boc protected homopolymers and related copolymers were deprotected to obtain (co)polymers with the targeted side chain cationic charged units. The (co)polymers' structures were fully investigated via FT-IR and 1H NMR spectroscopy, size exclusion chromatography (SEC), and TGA-DSC-MS analysis. The polarimetry measurements revealed that the homopolymers retain their chiroptical properties after post-modification, and a sign inversion is noticed from (L) N-Boc-protected analogues to (D) for the TFA cationic charged homopolymers. Generally, cationically charged homopolymers with hydrophilic amino acids on the side chain showed efficient complexation of siRNA, but poor transfection while cationic copolymers having both tryptophan and valine or proline side chains revealed moderate siRNA binding, high transfection efficiency (> 90% of the cells) and potent gene silencing with IC50 values down to 5.5 nM. Particularly, these cationic copolymers showed higher gene silencing potency as compared to the commercial JetPRIME® reference, without reducing cell viability in the concentration range used for transfection, making this a very interesting system for in vitro siRNA transfection.
Collapse
Affiliation(s)
- Florica Adriana Jerca
- Smart Organic Materials Group, "Costin D. Nenitzescu" Institute of Organic and Supramolecular Chemistry, Romanian Academy, 202B Spl. Independentei CP 35-108, 060023 Bucharest, Romania; Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000 Ghent, Belgium.
| | - Cristina Muntean
- Ghent Research Group on Nanomedicines, Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium
| | - Katrien Remaut
- Ghent Research Group on Nanomedicines, Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium
| | - Valentin Victor Jerca
- Smart Organic Materials Group, "Costin D. Nenitzescu" Institute of Organic and Supramolecular Chemistry, Romanian Academy, 202B Spl. Independentei CP 35-108, 060023 Bucharest, Romania; Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000 Ghent, Belgium
| | - Koen Raemdonck
- Ghent Research Group on Nanomedicines, Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium
| | - Richard Hoogenboom
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000 Ghent, Belgium.
| |
Collapse
|
7
|
Qian DW, Yang J, Wang GW, Yang SD. Nickel-Catalyzed Sodium Hypophosphite-Participated Direct Hydrophosphonylation of Alkyne toward H-Phosphinates. J Org Chem 2023; 88:3539-3554. [PMID: 36825676 DOI: 10.1021/acs.joc.2c02741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
The traditional methods for the synthesis of phosphinate esters use phosphorus trichloride (PCl3) as the phosphorous source, resulting in procedures that are often highly polluting and energy intensive. The search for an alternative approach that is both mild and environmentally friendly is a challenging, yet highly rewarding task in modern chemistry. Herein, we use an inorganic phosphorous-containing species, NaH2PO2, to serve as the source of phosphorous that participates directly in the nickel-catalyzed selective alkyne hydrophosphonylation reaction. The transformation was achieved in a multicomponent fashion and at room temperature, and most importantly, the H-phosphinate product generated is an advanced intermediate which can be readily converted into diverse phosphinate derivatives, including those bearing new P-C, P-S, P-N, P-Se, and P-O bonds, thus providing a complimentary method to classic phosphinate ester synthesis techniques.
Collapse
Affiliation(s)
- Dang-Wei Qian
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China
| | - Jin Yang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China
| | - Gang-Wei Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China
| | - Shang-Dong Yang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China.,State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000 P. R. China
| |
Collapse
|
8
|
Xin N, Lv Y, Lian Y, Lin Z, Huang XQ, Zhao CQ, Wang Y. Preparation of Vinylphosphonates from Ketones Promoted by Tf 2O. J Org Chem 2023. [PMID: 36802599 DOI: 10.1021/acs.joc.2c02563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
An efficient triflic anhydride promoted phosphorylation of ketone was disclosed, and vinylphosphorus compounds were prepared under solvent- and metal-free conditions. Both aryl and alkyl ketones could perform smoothly to give vinyl phosphonates in high to excellent yields. In addition, the reaction was easy to carry out and easy to scale up. Mechanistic studies suggested that this transformation might involve nucleophilic vinylic substitution or a nucleophilic addition-elimination mechanism.
Collapse
Affiliation(s)
- Nana Xin
- Shandong Key Laboratory of Chemical Energy Storage and New Battery Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Yongzheng Lv
- Shandong Key Laboratory of Chemical Energy Storage and New Battery Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Yongjian Lian
- Shandong Key Laboratory of Chemical Energy Storage and New Battery Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Zhu Lin
- Shandong Key Laboratory of Chemical Energy Storage and New Battery Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Xian-Qiang Huang
- Shandong Key Laboratory of Chemical Energy Storage and New Battery Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Chang-Qiu Zhao
- Shandong Key Laboratory of Chemical Energy Storage and New Battery Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Yanlan Wang
- Shandong Key Laboratory of Chemical Energy Storage and New Battery Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| |
Collapse
|
9
|
Cong X, Huang L, Hou Z. C–H functionalization with alkenes, allenes, and alkynes by half-sandwich rare-earth catalysts. Tetrahedron 2023. [DOI: 10.1016/j.tet.2023.133323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
|
10
|
Design, Synthesis and Actual Applications of the Polymers Containing Acidic P-OH Fragments: Part 2-Sidechain Phosphorus-Containing Polyacids. Int J Mol Sci 2023; 24:ijms24021613. [PMID: 36675149 PMCID: PMC9862152 DOI: 10.3390/ijms24021613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 01/11/2023] [Indexed: 01/18/2023] Open
Abstract
Macromolecules containing acidic fragments in side-groups—polyacids—occupy a special place among synthetic polymers. Properties and applications of polyacids are directly related to the chemical structure of macromolecules: the nature of the acidic groups, polymer backbone, and spacers between the main chain and acidic groups. The chemical nature of the phosphorus results in the diversity of acidic >P(O)OH fragments in sidechain phosphorus-containing polyacids (PCPAs) that can be derivatives of phosphoric or phosphinic acids. Sidechain PCPAs have many similarities with other polyacids. However, due to the relatively high acidity of −P(O)(OH)2 fragment, bone and mineral affinity, and biocompatibility, sidechain PCPAs have immense potential for diverse applications. Synthetic approaches to sidechain PCPAs also have their own specifics. All these issues are discussed in the present review.
Collapse
|
11
|
Pan Y, Jiang X, Kang X, Hou X, Wan C, Song X, Leung WH, So YM. Flexible Coordination of the Bis(amino-oxazoline) Ligand in Rare-Earth Metal Complexes: Synthesis, Structure, and Their Reactivity and Polymerization Performance. Inorg Chem 2022; 61:18828-18841. [DOI: 10.1021/acs.inorgchem.2c02057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Yu Pan
- College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-textiles, Institute of Functional Textiles and Advanced Materials, Qingdao University, Qingdao, Shandong 266071, China
- School of Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Xinxin Jiang
- School of Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Xiaohui Kang
- College of Pharmacy, Dalian Medical University, Dalian, Liaoning 116044, China
| | - Xin Hou
- School of Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Chunteng Wan
- School of Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Xuezhi Song
- School of Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Wa-Hung Leung
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Yat-Ming So
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| |
Collapse
|
12
|
Peng L, Zhang M, Zheng L, Yuan Q, Yu Z, Shen J, Chang Y, Wang Y, Li A. Regulated Li 2 S Deposition toward Rapid Kinetics Li-S Batteries by a Separator Modified by CeO 2 -Decorated Porous Carbon Nanostructure. SMALL METHODS 2022; 6:e2200332. [PMID: 35689308 DOI: 10.1002/smtd.202200332] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 05/08/2022] [Indexed: 06/15/2023]
Abstract
Although the high-energy-density lithium sulfur (Li-S) battery has been considered one of the most promising next-generation energy storage technology, the practical applications have been plagued by the sluggish reaction kinetics and the shuttle effect of lithium polysulfides intermediates. Here, to address the above issues, the authors report a novel separator modified by CeO2 -decorated porous carbon nanostructure (CeO2 /KB/PP). Benefiting from the strong polar surface and large specific surface area, (CeO2 -doped Ketjen Black) delivers efficient chemical adsorption toward lithium polysulfides. Moreover, rich oxygen vacancies of CeO2 provide abundant active sites to expedite lithium polysulfides conversion and regulate deposition and nucleation of Li2 S. Taking advantage of these merits, the battery with the CeO2 /KB/PP separator exhibits remarkable electrochemical performance, including low-capacity decay of only 0.06% per cycle over 1000 cycles at 2 C and superior rate capability of 627 mAh g-1 at 3 C. Even with a high sulfur loading of 6.6 mg cm-2 , the battery can achieve a high areal capacity of 3.6 mAh cm-2 after 100 cycles. This work provides a new application of rare-earth-based materials to facilitate Li-S batteries.
Collapse
Affiliation(s)
- Lin Peng
- School of Chemistry, South China Normal University, Guangzhou, 510006, China
| | - Mingkun Zhang
- School of Chemistry, South China Normal University, Guangzhou, 510006, China
| | - Liyuan Zheng
- School of Chemistry, South China Normal University, Guangzhou, 510006, China
| | - Qichong Yuan
- School of Chemistry, South China Normal University, Guangzhou, 510006, China
| | - Zhanjiang Yu
- School of Environment, South China Normal University, Guangzhou, 510006, China
| | - Junhao Shen
- School of Chemistry, South China Normal University, Guangzhou, 510006, China
| | - Yu Chang
- School of Environment, South China Normal University, Guangzhou, 510006, China
| | - Yi Wang
- Department of Mechanic and Electronic Engineering, Zhongkai University of Agriculture and Engineering Guangzhou, Guangzhou, 510225, China
| | - Aiju Li
- School of Chemistry, South China Normal University, Guangzhou, 510006, China
| |
Collapse
|
13
|
Bai H, Wang Y, Han L, Wang X, Yan H, Li X, Chen S, Leng H, Yao Z, Ma H. Selective Frustrated/Nonfrustrated Anion-Migrated Ring-Opening Polymerization of 1-Cyclopropylvinylbenzene. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00453] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hongyuan Bai
- Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Yinran Wang
- Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Li Han
- Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Xuefei Wang
- Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Hong Yan
- Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Xuwen Li
- Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Siwei Chen
- Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Haitao Leng
- Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Zijing Yao
- Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Hongwei Ma
- Department of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| |
Collapse
|
14
|
Tolpygin AO, Sachkova AA, Mikhailychev AD, Ob'edkov AM, Kovylina TA, Cherkasov AV, Fukin GK, Trifonov AA. Sc and Y bis(alkyl) complexes supported by bidentate and tridentate amidinate ligands. Synthesis, structure and catalytic activity in polymerization of isoprene and 1-heptene. Dalton Trans 2022; 51:7723-7731. [PMID: 35522255 DOI: 10.1039/d2dt00866a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of bis(alkyl) complexes {(tBu)C[N(2,6-Me2C6H3)]2}Ln(CH2SiMe3)2(THF)n (Ln = Y, n = 1 (1); Ln = Sc, n = 1 (2)), {2-[Ph2P(O)]C6H4NC(tBu)N(2,6-Me2C6H3)}Sc(CH2SiMe3)2 (3), {2-[Ph2P(NPh)]C6H4NC(tBu)N(2,6-Me2C6H3)}Sc(CH2SiMe3)2 (4) coordinated by bidentate (N,N) and tridentate (N,N,O; N,N,N) amidinate ligands are synthesized using an alkane elimination approach. Yttrium complex 1 demonstrated a half-life of ∼2.5 days at room temperature in benzene-D6 (C6D6) solution, whereas scandium complexes proved to be much more stable (25 d (2), 30 d (3) and 42 d (4)). Complexes 1-4 as a part of ternary catalytic systems 1-4/TB, HNB/AlR3 (AlR3 = AliBu3, AliBu2H; TB = [Ph3C][B(C6F5)4], HNB = [PhNHMe2][B(C6F5)4]) demonstrated high catalytic activity in isoprene polymerization and enable 80%-100% conversion of 1000 equivalents of monomer into polymer at 25 °C within 3-180 min. The isolated polyisoprenes feature predominantly cis-1,4-regularity (69.2%-87.3%) and polydispersities Mw/Mn = 2.26-8.92. Moreover, the binary (2/TB) and ternary (1-4/TB/10 AliBu3) systems initiate 1-heptene polymerization providing 40%-100% conversion of 500 equivalents of monomer in 24 h at 25 °C giving polymer samples with Mn = 1.55-190.2 × 103 and Mw/Mn = 1.55-3.87.
Collapse
Affiliation(s)
- Aleksei O Tolpygin
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 603950, Nizhny Novgorod, Russia. .,Institute of Organoelement compounds of Russian Academy of Sciences, 28 Vavilova str., 119334, Moscow, Russia
| | - Anastasia A Sachkova
- Lobachevsky State University of Nizhny Novgorod, 23 Prospekt Gagarina, 603022, Nizhny Novgorod, Russia
| | - Alexander D Mikhailychev
- Lobachevsky State University of Nizhny Novgorod, 23 Prospekt Gagarina, 603022, Nizhny Novgorod, Russia
| | - Anatoly M Ob'edkov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 603950, Nizhny Novgorod, Russia.
| | - Tatyana A Kovylina
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 603950, Nizhny Novgorod, Russia.
| | - Anton V Cherkasov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 603950, Nizhny Novgorod, Russia.
| | - Georgy K Fukin
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 603950, Nizhny Novgorod, Russia.
| | - Alexander A Trifonov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 603950, Nizhny Novgorod, Russia. .,Institute of Organoelement compounds of Russian Academy of Sciences, 28 Vavilova str., 119334, Moscow, Russia
| |
Collapse
|
15
|
Manjarrez Y, Cheng-Tan MDCL, Fieser ME. Perfectly Alternating Copolymerization of Cyclic Anhydrides and Epoxides with Yttrium β-Diketiminate Complexes. Inorg Chem 2022; 61:7088-7094. [PMID: 35483671 DOI: 10.1021/acs.inorgchem.2c00529] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Monometallic yttrium β-diketiminate complexes are active and controlled catalysts for perfectly alternating ring-opening copolymerization of 1-butene oxide and phthalic anhydride under mild conditions. β-Diketiminate ligands with pendant neutral donors were targeted to identify both the impact of donor strength and number of donors on rates of polymerization and the presence of undesirable side reactions. Initiating groups were also varied between alkyls, chlorides, and alkoxides. In the presence of a cocatalyst, the catalysts studied were active for polymerization with minimal side reactions, whereas lack of cocatalysts led to competing homopolymerization of epoxides. While a greater donor strength and a larger number of donors both increase the rate of polymerization, donor strength generally had a bigger impact when a cocatalyst was used. Additionally, alkoxide and chloride initiators proved to be the fastest, with alkyls being more sluggish. These subtle ligand changes significantly impacting polymerization activity lend promise to the facile tunability of rare earth metal complexes to be highly active for the target copolymerization, which renders further research in this area attractive and timely.
Collapse
Affiliation(s)
- Yvonne Manjarrez
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | | | - Megan E Fieser
- Department of Chemistry and Wrigley Institute for Environmental Studies, University of Southern California, Los Angeles, California 90089, United States
| |
Collapse
|
16
|
Chen J, Wu X, Zhang S, Yan X, Wu X, Cao Q, Xu H, Li X. Commercially available palladium salts as practical and green single-component catalysts in the coordination polymerization of 1-chloro-2-phenylacetylenes in air. Polym Chem 2022. [DOI: 10.1039/d2py00490a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Commercially available Pd salts serve as single-component catalysts for coordination polymerization of 1-chloro-2-phenylacetylenes, which affords a new design concept of metal catalysts for coordination polymerization of disubstituted alkynes.
Collapse
Affiliation(s)
- Jupeng Chen
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing, 100081, China
| | - Xiaolin Wu
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing, 100081, China
| | - Shaowen Zhang
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing, 100081, China
| | - Xiangqian Yan
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing, 100081, China
| | - Xiaolu Wu
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing, 100081, China
| | - Qingbin Cao
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing, 100081, China
| | - Huan Xu
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing, 100081, China
| | - Xiaofang Li
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing, 100081, China
| |
Collapse
|
17
|
Jerca FA, Jerca VV, Hoogenboom R. In Vitro Assessment of the Hydrolytic Stability of Poly(2-isopropenyl-2-oxazoline). Biomacromolecules 2021; 22:5020-5032. [PMID: 34753285 DOI: 10.1021/acs.biomac.1c00994] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Poly(2-isopropenyl-2-oxazoline) (PiPOx) is emerging as a promising, versatile polymer platform to design functional materials and particularly biomaterials that rely on the hydrophilic character of the 2-oxazoline side units. To be able to assess the applicability of PiPOx in a biomedical context, it is essential to understand its stability and degradation behavior in physiological conditions. In the present work, the hydrolytic stability of PiPOx was systematically investigated as a function of pH during incubation in various buffers. PiPOx was found to be stable in deionized water (pH 6.9), to have good stability in basic conditions (pH 8 and 9), to be satisfactorily stable in neutral conditions (pH 7.4), and to have moderate to low stability in acidic conditions (decreases drastically from pH 6 to pH 1.2). At pH 4, PiPOx formed a crosslinked network in a timeframe of hours, while at pH 1.2, PiPOx was transformed to a water-soluble poly(N-(2-hydroxyethyl)methacrylamide) type of structure over the course of 2 weeks. In vitro stability assays were performed in phosphate-buffered saline (pH 7.4), simulated body fluid (SBF) (pH 7.4), simulated saliva (pH 6.4), simulated intestinal fluid (pH 6.8), and plasma (pH 7.4) revealing that PiPOx is stable in these SBFs up to 1 week of incubation. When incubated in simulated gastric fluid (pH 1.2), PiPOx exhibited a similar degradation behavior to that observed in the buffer at pH 1.2, rendering a water-soluble structure. The presented results on the stability of PiPOx will be important for future use of PiPOx for the development of drug-delivery systems and biomedical applications, such as hydrogels.
Collapse
Affiliation(s)
- Florica Adriana Jerca
- Centre of Organic Chemistry "Costin D. Nenitzescu", Romanian Academy, 202B Spl. Independentei CP 35-108, 060023 Bucharest, Romania
| | - Valentin Victor Jerca
- Centre of Organic Chemistry "Costin D. Nenitzescu", Romanian Academy, 202B Spl. Independentei CP 35-108, 060023 Bucharest, Romania
| | - Richard Hoogenboom
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000 Ghent, Belgium
| |
Collapse
|
18
|
Yin L, Liu L, Zhang N. Brush-like polymers: design, synthesis and applications. Chem Commun (Camb) 2021; 57:10484-10499. [PMID: 34550120 DOI: 10.1039/d1cc03940g] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
With the development of controlled polymerisation, almost all polymerisation strategies have been successfully transplanted to surface-initiated polymerisation. The resulting polymer brushes have emerged as an effective tool for surface functionalization and modulation of the surface properties of materials. To meet various demands it is possible to tailor a material surface with polymer brushes that have diverse dimensionalities, morphologies and compositions. The crowded environment within polymer brushes as well as the stretched conformation of polymer chains sometimes provide unique physicochemical properties, which lead to the delicate creation of inorganic-organic hybridised nanostructures, anti-fouling coatings, biomedical carriers, and materials for use in lubrication, photonics and energy storage. So far, challenges remain in the high-precision synthesis and topological control needed to realize extended applications of polymer brushes. In this Feature Article, we highlight the topology, potential application prospects and various synthetic protocols, particularly for recently established methods, for the efficient synthesis of polymer brushes, as well as their benefits and limitations.
Collapse
Affiliation(s)
- Liying Yin
- Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. China.
| | - Lin Liu
- Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. China.
| | - Ning Zhang
- Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. China.
| |
Collapse
|
19
|
Su Y, Zhao Y, Zhang H, Luo Y, Xu X. Rare-Earth Aryloxide/Ylide-Functionalized Phosphine Frustrated Lewis Pairs for the Polymerization of 4-Vinylpyridine and Its Derivatives. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01339] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Yujie Su
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Yanan Zhao
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Hongyue Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Yi Luo
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
- PetroChina Petrochemical Research Institute, Beijing 102206, P. R. China
| | - Xin Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| |
Collapse
|
20
|
Richardson GM, Douair I, Cameron SA, Maron L, Anker MD. Ytterbium (II) Hydride as a Powerful Multielectron Reductant. Chemistry 2021; 27:13144-13148. [PMID: 34258796 DOI: 10.1002/chem.202102428] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Indexed: 11/11/2022]
Abstract
A dimeric β-diketiminato ytterbium(II) hydride affects both the two-electron aromatization of 1,3,5,7-cyclooctatetraene (COT) and the more challenging two-electron reduction of polyaromatic hydrocarbons, including naphthalene (E0 =-2.60 V). Confirmed by Density Functional Theory calculations, these reactions proceed via consecutive polarized Yb-H/C=C insertion and deprotonation steps to provide the respective ytterbium (II) inverse sandwich complexes and hydrogen gas. These observations highlight the ability of a simple ytterbium(II) hydride to act as a powerful two-electron reductant at room temperature without the necessity of an external electron to initiate the reaction and avoiding radicaloid intermediates.
Collapse
Affiliation(s)
- Georgia M Richardson
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand
| | - Iskander Douair
- LPCNO, CNRS ( INSA, Université Paul Sabatier, Université de Toulouse et CNRS, 135 Avenue de Rangueil, 31077, Toulouse, France
| | - Scott A Cameron
- Ferrier Research Institute, Victoria University of Wellington, PO Box 600, Wellington, 6012, New Zealand
| | - Laurent Maron
- LPCNO, CNRS ( INSA, Université Paul Sabatier, Université de Toulouse et CNRS, 135 Avenue de Rangueil, 31077, Toulouse, France
| | - Mathew D Anker
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand
| |
Collapse
|
21
|
Wei X, Bai C, Zhao L, Zhang P, Li Z, Wang Y, Su Q. Lewis Acid Enables Ketone Phosphorylation: Synthesis of Alkenyl Phosphonates. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100083] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Xiao‐Hong Wei
- Key Laboratory for Utility of Environment‐Friendly Composite Materials and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University No. 1, Northwest Xincun Lanzhou Gansu 730030 China
| | - Chun‐Yuan Bai
- Key Laboratory for Utility of Environment‐Friendly Composite Materials and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University No. 1, Northwest Xincun Lanzhou Gansu 730030 China
| | - Lian‐Biao Zhao
- Key Laboratory for Utility of Environment‐Friendly Composite Materials and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University No. 1, Northwest Xincun Lanzhou Gansu 730030 China
| | - Ping Zhang
- Key Laboratory for Utility of Environment‐Friendly Composite Materials and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University No. 1, Northwest Xincun Lanzhou Gansu 730030 China
| | - Zhen‐Hua Li
- Key Laboratory for Utility of Environment‐Friendly Composite Materials and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University No. 1, Northwest Xincun Lanzhou Gansu 730030 China
| | - Yan‐Bin Wang
- Key Laboratory for Utility of Environment‐Friendly Composite Materials and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University No. 1, Northwest Xincun Lanzhou Gansu 730030 China
| | - Qiong Su
- Key Laboratory for Utility of Environment‐Friendly Composite Materials and Biomass in University of Gansu Province, College of Chemical Engineering, Northwest Minzu University No. 1, Northwest Xincun Lanzhou Gansu 730030 China
| |
Collapse
|
22
|
Pehl TM, Adams F, Kränzlein M, Rieger B. Expanding the Scope of Organic Radical Polymers to Polyvinylphosphonates Synthesized via Rare-Earth Metal-Mediated Group-Transfer Polymerization. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00217] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Thomas M. Pehl
- WACKER-Chair of Macromolecular Chemistry, Catalysis Research Center, Department of Chemistry, Technical University of Munich, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Friederike Adams
- WACKER-Chair of Macromolecular Chemistry, Catalysis Research Center, Department of Chemistry, Technical University of Munich, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Moritz Kränzlein
- WACKER-Chair of Macromolecular Chemistry, Catalysis Research Center, Department of Chemistry, Technical University of Munich, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Bernhard Rieger
- WACKER-Chair of Macromolecular Chemistry, Catalysis Research Center, Department of Chemistry, Technical University of Munich, Lichtenbergstr. 4, 85748 Garching, Germany
| |
Collapse
|
23
|
Xu Z, Zhang Z, Meng C, Zhang X, Xu K, Liu L, Wang T, Xu H, Mao G. Ligand-Free Pd-Catalyzed Hydrophosphorylation of Internal Alkynes for the Synthesis of E-Vinylphosphonates. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202103038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
24
|
Xin N, Lian Y, Lv Y, Wang Y, Huang XQ, Zhao CQ. Markovnikov-addition of H-phosphonates to terminal alkynes under metal- and solvent-free conditions. RSC Adv 2021; 11:24991-24994. [PMID: 35481042 PMCID: PMC9036860 DOI: 10.1039/d1ra04306d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 07/06/2021] [Indexed: 11/21/2022] Open
Abstract
Synthesis of α-vinylphosphonates from terminal alkynes and H-phosphonates as only the Markovnikov-regioisomer under metal- and solvent-free conditions.
Collapse
Affiliation(s)
- Nana Xin
- Institution of Functional Organic Molecules and Materials
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- Liaocheng University
- College of Chemistry and Chemical Engineering
- Liaocheng
| | - Yongjian Lian
- Institution of Functional Organic Molecules and Materials
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- Liaocheng University
- College of Chemistry and Chemical Engineering
- Liaocheng
| | - Yongzheng Lv
- Institution of Functional Organic Molecules and Materials
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- Liaocheng University
- College of Chemistry and Chemical Engineering
- Liaocheng
| | | | - Xian-Qiang Huang
- Institution of Functional Organic Molecules and Materials
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- Liaocheng University
- College of Chemistry and Chemical Engineering
- Liaocheng
| | - Chang-Qiu Zhao
- Institution of Functional Organic Molecules and Materials
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- Liaocheng University
- College of Chemistry and Chemical Engineering
- Liaocheng
| |
Collapse
|
25
|
Liu J, Xie Y, Wu C, Shao Y, Zhang F, Shi Y, Liu Q, Chen J. Samarium( iii) catalyzed synthesis of alkenylboron compounds via hydroboration of alkynes. Org Chem Front 2021. [DOI: 10.1039/d1qo00513h] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The homoleptic lanthanide complex Sm[N(TMS)2]3 is an efficient rare-earth catalyst for the hydroboration of alkynes to the corresponding alkenylboron compounds.
Collapse
Affiliation(s)
- Jichao Liu
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou 325035
- China
| | - Yaoyao Xie
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou 325035
- China
| | - Caiyan Wu
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou 325035
- China
| | - Yinlin Shao
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou 325035
- China
- Institute of New Materials & Industrial Technology
| | - Fangjun Zhang
- School of Pharmaceutical Sciences
- Wenzhou Medical University
- Wenzhou 325035
- China
| | - Yinyin Shi
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou 325035
- China
| | - Qianrui Liu
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou 325035
- China
| | - Jiuxi Chen
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou 325035
- China
| |
Collapse
|
26
|
Schaffer A, Kränzlein M, Rieger B. Precise Synthesis of Poly(dimethylsiloxane) Copolymers through C–H Bond-Activated Macroinitiators via Yttrium-Mediated Group Transfer Polymerization and Ring-Opening Polymerization. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01639] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Andreas Schaffer
- WACKER-Chair of Macromolecular Chemistry, Catalysis Research Center, Technical University of Munich, Lichtenbergstraße 4, Garching near, Munich 85748, Germany
| | - Moritz Kränzlein
- WACKER-Chair of Macromolecular Chemistry, Catalysis Research Center, Technical University of Munich, Lichtenbergstraße 4, Garching near, Munich 85748, Germany
| | - Bernhard Rieger
- WACKER-Chair of Macromolecular Chemistry, Catalysis Research Center, Technical University of Munich, Lichtenbergstraße 4, Garching near, Munich 85748, Germany
| |
Collapse
|
27
|
Zhao L, Duan X, Azhar MR, Sun H, Fang X, Wang S. Selective adsorption of rare earth ions from aqueous solution on metal-organic framework HKUST-1. CHEMICAL ENGINEERING JOURNAL ADVANCES 2020. [DOI: 10.1016/j.ceja.2020.100009] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
|
28
|
C–H Bond Activation of Silyl-Substituted Pyridines with Bis(Phenolate)Yttrium Catalysts as a Facile Tool towards Hydroxyl-Terminated Michael-Type Polymers. Catalysts 2020. [DOI: 10.3390/catal10040448] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Herein, silicon-protected, ortho-methylated hydroxy-pyridines were reported as initiators in 2-aminoalkoxy-bis(phenolate)yttrium complexes for rare earth metal-mediated group-transfer polymerization (REM-GTP) of Michael-type monomers. To introduce these initiators, C−H bond activation was performed by reacting [(ONOO)tBuY(X)(thf)] (X = CH2TMS, thf = tetrahydrofuran) with tert-butyl-dimethyl-silyl-functionalized α-methylpyridine to obtain the complex [(ONOOtBuY(X)(thf)] (X = 4-(4′-(((tert-butyldimethylsilyl)oxy)methyl)phenyl)-2,6-di-methylpyridine). These initiators served as functional end-groups in polymers produced via REM-GTP. In this contribution, homopolymers of 2-vinylpyridine (2VP) and diethyl vinyl phosphonate (DEVP) were produced. Activity studies and end-group analysis via mass spectrometry, size-exclusion chromatography (SEC) and NMR spectroscopy were performed to reveal the initiator efficiency, the catalyst activity towards both monomers as well as the initiation mechanism of this initiator in contrast to commonly used alkyl initiators. In addition, 2D NMR studies were used to further confirm the end-group integrity of the polymers. For all polymers, different deprotection routes were evaluated to obtain hydroxyl-terminated poly(2-vinylpyridine) (P2VP) and poly(diethyl vinyl phosphonate) (PDEVP). Such hydroxyl groups bear the potential to act as anchoring points for small bioactive molecules, for post-polymerization functionalization or as macroinitiators for further polymerizations.
Collapse
|
29
|
Denk A, Kernbichl S, Schaffer A, Kränzlein M, Pehl T, Rieger B. Heteronuclear, Monomer-Selective Zn/Y Catalyst Combines Copolymerization of Epoxides and CO 2 with Group-Transfer Polymerization of Michael-Type Monomers. ACS Macro Lett 2020; 9:571-575. [PMID: 35648488 DOI: 10.1021/acsmacrolett.9b01025] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Terpolymerizations of cyclohexene oxide (CHO), CO2, and the Michael-type monomer 2-vinylpyridine (2VP) are presented. The combination of two distinct polymerization mechanisms was enabled by the synthesis of a heterobifunctional complex (3). Its β-diiminate zinc moiety allows the ring-opening copolymerization of CHO and CO2, whereas the yttrium metallocene catalyzed the rare earth metal-mediated group-transfer polymerization of the polar vinyl monomer. Both units were connected via the CH-bond activation of a pyridyl-alkoxide linker. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) revealed the successful transfer of the linker to the end-group of the respective homopolymers poly(cyclohexene carbonate) (PCHC) and poly(2VP) (P2VP) being the prerequisite for copolymer formation. Aliquot gel-permeation chromatography (GPC) analysis and solubility behavior tests confirmed the P2VP-block(b)-PCHC terpolymer formation via two pathways, a sequential and a one-pot procedure. Furthermore, the versatility of the method was demonstrated by introducing 2-isopropenyl-2-oxazoline (IPOx) as the second Michael-type monomer that yielded the terpolymer poly(IPOx)-b-PCHC.
Collapse
Affiliation(s)
- Alina Denk
- WACKER-Chair of Macromolecular Chemistry, Catalysis Research Center, Technical University Munich, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Sebastian Kernbichl
- WACKER-Chair of Macromolecular Chemistry, Catalysis Research Center, Technical University Munich, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Andreas Schaffer
- WACKER-Chair of Macromolecular Chemistry, Catalysis Research Center, Technical University Munich, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Moritz Kränzlein
- WACKER-Chair of Macromolecular Chemistry, Catalysis Research Center, Technical University Munich, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Thomas Pehl
- WACKER-Chair of Macromolecular Chemistry, Catalysis Research Center, Technical University Munich, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Bernhard Rieger
- WACKER-Chair of Macromolecular Chemistry, Catalysis Research Center, Technical University Munich, Lichtenbergstr. 4, 85748 Garching, Germany
| |
Collapse
|
30
|
Zhuang Q, Mou Z, Gu J, Xie H, Luo Y. β-Diketiminato Rare-Earth Metal Complexes: The Influence of Monoatomic Substituents in the N-aryl Moieties on Structures and Properties. Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.201900280] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Qingxiang Zhuang
- School of Material Science and Chemical Engineering; Ningbo University; 315211 Ningbo Zhejiang P. R. China
| | - Zehuai Mou
- School of Material Science and Chemical Engineering; Ningbo University; 315211 Ningbo Zhejiang P. R. China
| | - Jialu Gu
- School of Material Science and Chemical Engineering; Ningbo University; 315211 Ningbo Zhejiang P. R. China
| | - Hongyan Xie
- China-Australia Institute for Advanced Materials and Manufacturing; Jiaxing University; 314000 Jiaxing P. R. China
| | - Yunjie Luo
- School of Material Science and Chemical Engineering; Ningbo University; 315211 Ningbo Zhejiang P. R. China
| |
Collapse
|
31
|
Zhao Y, Luo G, Xu X, Hou Z, Luo Y. A computational study of the reactivity of rare-earth/phosphorus Lewis pairs toward polymerization of conjugated polar alkenes. Inorg Chem Front 2020. [DOI: 10.1039/d0qi01067g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The polymerization mechanism of methyl methacrylate (MMA) catalyzed by rare-earth/phosphorus (RE/P) Lewis pairs has been systematically studied through density functional theory (DFT) calculations.
Collapse
Affiliation(s)
- Yanan Zhao
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
- China
| | - Gen Luo
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
- China
| | - Xin Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Zhaomin Hou
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
- China
| | - Yi Luo
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
- China
| |
Collapse
|
32
|
Zhao W, He J, Zhang Y. Lewis pairs polymerization of polar vinyl monomers. Sci Bull (Beijing) 2019; 64:1830-1840. [PMID: 36659579 DOI: 10.1016/j.scib.2019.08.025] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 08/18/2019] [Accepted: 08/21/2019] [Indexed: 01/21/2023]
Abstract
The globally increasing demands for polymer materials stimulate the significantly intense attention focused on the Lewis pair polymerization (LPP) of various polar vinyl monomers catalyzed by Lewis pairs (LPs) composed of Lewis acid (LA) and Lewis base (LB). According to the degree of interaction between LA and LB, LPs could be divided into classical Lewis adduct (CLA), interacting Lewis pair (ILP) and frustrated Lewis pair (FLP). Regulation of the Lewis basicity, Lewis acidity, and steric effects of these LPs has a significant impact on the polymer chain initiation, propagation and termination as well as chain transfer reaction during polymerization. Compared with other polymerization strategies, LPP has shown several unique advantages towards the polymerization of polar vinyl monomers such as high activity, control or livingness, mild conditions, and complete chemo- or regioselectivity. We will comprehensively review the recent advances achieved in the LPP of polar vinyl monomers according to the classification of the employed LPs based on different LAs, by highlighting the key polymerization results, polymerization mechanisms as well as the currently unmet challenges and the future research directions of LPP chemistry.
Collapse
Affiliation(s)
- Wuchao Zhao
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Jianghua He
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Yuetao Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China.
| |
Collapse
|
33
|
Oishi M, Yoshimura R, Nomura N. Dinuclear Pentacoordinated Organoyttrium Biphenolates as Initiators for the Synthesis of High-Molecular Weight Isotactic Poly(2-vinylpyridine). Inorg Chem 2019; 58:13755-13760. [DOI: 10.1021/acs.inorgchem.9b02385] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Masataka Oishi
- School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Reiji Yoshimura
- Laboratory of Polymer Chemistry, Graduate School of Bioagricultural Sciences, E1-1(300), Nagoya University, Nagoya 464-8601, Japan
| | - Nobuyoshi Nomura
- Laboratory of Polymer Chemistry, Graduate School of Bioagricultural Sciences, E1-1(300), Nagoya University, Nagoya 464-8601, Japan
| |
Collapse
|
34
|
Weger M, Pahl P, Schmidt F, Soller BS, Altmann PJ, Pöthig A, Gemmecker G, Eisenreich W, Rieger B. Isospecific Group-Transfer Polymerization of Diethyl Vinylphosphonate and Multidimensional NMR Analysis of the Polymer Microstructure. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01326] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
35
|
Ren L, Ran M, He J, Xiang D, Chen F, Liu P, He C, Yao Q. A Palladium-Catalyzed Decarboxylative Heck-Type Reaction of Disubstituted Vinylphosphonates in the Stereoselective Synthesis of Trisubstituted Vinylphosphonates. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900810] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Linjing Ren
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province; Generic Drug Research Center of Guizhou Province; School of Pharmacy; Zunyi Medical University; 6 Xuefu Road West 563000 Zunyi China
| | - Maogang Ran
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province; Generic Drug Research Center of Guizhou Province; School of Pharmacy; Zunyi Medical University; 6 Xuefu Road West 563000 Zunyi China
| | - Jiaxin He
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province; Generic Drug Research Center of Guizhou Province; School of Pharmacy; Zunyi Medical University; 6 Xuefu Road West 563000 Zunyi China
| | - Dan Xiang
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province; Generic Drug Research Center of Guizhou Province; School of Pharmacy; Zunyi Medical University; 6 Xuefu Road West 563000 Zunyi China
| | - Feng Chen
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province; Generic Drug Research Center of Guizhou Province; School of Pharmacy; Zunyi Medical University; 6 Xuefu Road West 563000 Zunyi China
| | - Peijun Liu
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province; Generic Drug Research Center of Guizhou Province; School of Pharmacy; Zunyi Medical University; 6 Xuefu Road West 563000 Zunyi China
| | - Chunyang He
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province; Generic Drug Research Center of Guizhou Province; School of Pharmacy; Zunyi Medical University; 6 Xuefu Road West 563000 Zunyi China
| | - Qiuli Yao
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province; Generic Drug Research Center of Guizhou Province; School of Pharmacy; Zunyi Medical University; 6 Xuefu Road West 563000 Zunyi China
| |
Collapse
|
36
|
Sengel SB, Sahiner N. Synthesis and characterization of poly(N‐(2‐mercaptoethyl) acrylamide) microgel for biomedical applications. POLYM ADVAN TECHNOL 2019. [DOI: 10.1002/pat.4644] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Sultan B. Sengel
- Department of Chemistry and Nanoscience and Technology Research and Application Center (NANORAC), Faculty of Science and ArtsCanakkale Onsekiz Mart University Canakkale Turkey
| | - Nurettin Sahiner
- Department of Chemistry and Nanoscience and Technology Research and Application Center (NANORAC), Faculty of Science and ArtsCanakkale Onsekiz Mart University Canakkale Turkey
- Department of Ophthalmology, School of MedicineUniversity of South Florida Tampa Florida
| |
Collapse
|
37
|
Guo G, Wu X, Yan X, Yan L, Li X, Zhang S, Qiu N. Unprecedentedly High Activity and/or High Regio-/Stereoselectivity of Fluorenyl-Based CGC Allyl-Type η 3:η 1- tert-Butyl(dimethylfluorenylsilyl)amido Ligated Rare Earth Metal Monoalkyl Complexes in Olefin Polymerization. Polymers (Basel) 2019; 11:E836. [PMID: 31072012 PMCID: PMC6572029 DOI: 10.3390/polym11050836] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 04/29/2019] [Accepted: 04/30/2019] [Indexed: 11/16/2022] Open
Abstract
A series of fluorenyl-based constrained-geometry-configuration (CGC) allyl-type rare earth metal monoalkyl complexes bearing the divalent anionic η3:η1-tert-butyl(dimethylfluorenylsilyl)amido (η3:η1-FluSiMe2NtBu) ligand (η3:η1-FluSiMe2NtBu)Ln(CH2SiMe3)(THF)2 (1-3) have been synthesized via the alkane elimination reaction between the FluHSiMe2NHtBu ligand and rare earth metal tri(trimethylsilylmethyl) complexes Ln(CH2SiMe3)3(THF)n. Their structures are characterized by means of NMR spectrum, elemental analyses, and X-ray diffraction. These complexes 1-3 are isostructural and isomorphous, and each of them adopts a distorted-trigonal-bipyramidal configuration containing one η3:η1-FluSiMe2NtBu ligand, one CH2SiMe3 ligand, and two THF molecules. Unlike traditional CGC allyl-type rare earth metal complexes showing no or low activity and regio-/stereoselectivity in styrene or MMA polymerization, these complexes 1-3 exhibit high catalytic activities and/or high regio-/stereoselectivities in the cis-1,4-polymerization of isoprene and myrcene or in the syndiotactic polymerization of styrene under the aid of different activators (borate or borane) and AlR3. The in situ 1H NMR spectra suggest that the exchanges of chelating ligands such as alkyl groups and divalent anionic η3:η1-FluSiMe2NtBu ligands between rare earth metal centers and Al centers result in the formation of a heterobimetallic tetraalkylaluminate complex R2Al(μ-R)2Ln(R)(μ-R)2AlR2, which is activated by activators to form a divalent cationic species [Ln(μ-R)2AlR2]2+ as a catalytically active species in the coordination-insertion polymerization of olefins.
Collapse
Affiliation(s)
- Ge Guo
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing 100081, China.
| | - Xiaolu Wu
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing 100081, China.
| | - Xiangqian Yan
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing 100081, China.
| | - Li Yan
- Analytical and Testing Center, Liangxiang Campus of Beijing Institute of Technology, Liangxiang East Road, Fangshan District, Beijing 102488, China.
| | - Xiaofang Li
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing 100081, China.
| | - Shaowen Zhang
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing 100081, China.
| | - Nannan Qiu
- NHC Key Laboratory of Food Safety Risk Assessment, China National Center for Food Safety Risk Assessment, Beijing 100021, China.
| |
Collapse
|
38
|
Smith CA, Narouz MR, Lummis PA, Singh I, Nazemi A, Li CH, Crudden CM. N-Heterocyclic Carbenes in Materials Chemistry. Chem Rev 2019; 119:4986-5056. [PMID: 30938514 DOI: 10.1021/acs.chemrev.8b00514] [Citation(s) in RCA: 347] [Impact Index Per Article: 69.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
N-Heterocyclic carbenes (NHCs) have become one of the most widely studied class of ligands in molecular chemistry and have found applications in fields as varied as catalysis, the stabilization of reactive molecular fragments, and biochemistry. More recently, NHCs have found applications in materials chemistry and have allowed for the functionalization of surfaces, polymers, nanoparticles, and discrete, well-defined clusters. In this review, we provide an in-depth look at recent advances in the use of NHCs for the development of functional materials.
Collapse
Affiliation(s)
- Christene A Smith
- Department of Chemistry , Queen's University , 90 Bader Lane , Kingston , Ontario , Canada , K7L 3N6
| | - Mina R Narouz
- Department of Chemistry , Queen's University , 90 Bader Lane , Kingston , Ontario , Canada , K7L 3N6
| | - Paul A Lummis
- Department of Chemistry , Queen's University , 90 Bader Lane , Kingston , Ontario , Canada , K7L 3N6
| | - Ishwar Singh
- Department of Chemistry , Queen's University , 90 Bader Lane , Kingston , Ontario , Canada , K7L 3N6
| | - Ali Nazemi
- Department of Chemistry , Queen's University , 90 Bader Lane , Kingston , Ontario , Canada , K7L 3N6
| | - Chien-Hung Li
- Department of Chemistry , Queen's University , 90 Bader Lane , Kingston , Ontario , Canada , K7L 3N6
| | - Cathleen M Crudden
- Department of Chemistry , Queen's University , 90 Bader Lane , Kingston , Ontario , Canada , K7L 3N6.,Institute of Transformative Bio-Molecules, ITbM-WPI , Nagoya University , Nagoya , Chikusa 464-8601 , Japan
| |
Collapse
|
39
|
Pudasaini B. Yttrium Catalyzed Dialkyl Vinyl Phosphonate Polymerization: Mechanistic Insights on the Precision Polymerization from DFT. Organometallics 2019. [DOI: 10.1021/acs.organomet.8b00884] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bimal Pudasaini
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science, Daejeon, 34126, Republic of Korea
| |
Collapse
|
40
|
Su J, Zhou Y, Xu X. Hydroaminoalkylation of sterically hindered alkenes with N,N-dimethyl anilines using a scandium catalyst. Org Biomol Chem 2019; 17:2013-2019. [DOI: 10.1039/c8ob02657b] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Atom-economical and regioselective C(sp3)–C(sp3) bond formation has been achieved by C(sp3)–H alkylation of N,N-dimethyl anilines with sterically demanding alkenes by scandium catalysis.
Collapse
Affiliation(s)
- Jianhong Su
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Yiqun Zhou
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Xin Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| |
Collapse
|
41
|
Zhao Y, Lu H, Luo G, Kang X, Hou Z, Luo Y. Origin of stereoselectivity and multidimensional quantitative analysis of ligand effects on yttrium-catalysed polymerization of 2-vinylpyridine. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01670h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Through a combination of density functional theory (DFT) calculations and multivariate regression analysis, the origin of the stereoselectivity of yttrium-catalysed polymerization of 2-vinylpyridine (2VP) has been investigated.
Collapse
Affiliation(s)
- Yanan Zhao
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
- China
| | - Han Lu
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
- China
| | - Gen Luo
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
- China
| | - Xiaohui Kang
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
- China
| | - Zhaomin Hou
- Organometallic Chemistry Laboratory
- RIKEN Cluster for Pioneering Research, and Advanced Catalysis Research Group
- RIKEN Center for Sustainable Resource Science
- Wako
- Japan
| | - Yi Luo
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
- China
| |
Collapse
|
42
|
Wang Q, Chen S, Deng B, Wang Y, Dong D, Zhang N. Rare earth metal-mediated ring-opening polymerisation of cyclic phosphoesters. Polym Chem 2019. [DOI: 10.1039/c9py00025a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
An efficient polymerisation of cyclic phosphoesters using a rare-earth metallocene as a catalyst is described, giving biodegradable polyphosphonates and polyphosphates.
Collapse
Affiliation(s)
- Qiliao Wang
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Shanshan Chen
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Bicheng Deng
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Ying Wang
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Dewen Dong
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Ning Zhang
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| |
Collapse
|
43
|
Hong M, Chen J, Chen EYX. Polymerization of Polar Monomers Mediated by Main-Group Lewis Acid-Base Pairs. Chem Rev 2018; 118:10551-10616. [PMID: 30350583 DOI: 10.1021/acs.chemrev.8b00352] [Citation(s) in RCA: 170] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The development of new or more sustainable, active, efficient, controlled, and selective polymerization reactions or processes continues to be crucial for the synthesis of important polymers or materials with specific structures or functions. In this context, the newly emerged polymerization technique enabled by main-group Lewis pairs (LPs), termed as Lewis pair polymerization (LPP), exploits the synergy and cooperativity between the Lewis acid (LA) and Lewis base (LB) sites of LPs, which can be employed as frustrated Lewis pairs (FLPs), interacting LPs (ILPs), or classical Lewis adducts (CLAs), to effect cooperative monomer activation as well as chain initiation, propagation, termination, and transfer events. Through balancing the Lewis acidity, Lewis basicity, and steric effects of LPs, LPP has shown several unique advantages or intriguing opportunities compared to other polymerization techniques and demonstrated its broad polar monomer scope, high activity, control or livingness, and complete chemo- or regioselectivity, as well as its unique application in materials chemistry. These advances made in LPP are comprehensively reviewed, with the scope of monomers focusing on heteroatom-containing polar monomers, while the polymerizations mediated by main-group LAs and LBs separately that are most relevant to the LPP are also highlighted or updated. Examples of applying the principles of the LPP and LP chemistry as a new platform for advancing materials chemistry are highlighted, and currently unmet challenges in the field of the LPP, and thus the suggested corresponding future research directions, are also presented.
Collapse
Affiliation(s)
- Miao Hong
- State Key Laboratory of Organometallic Chemistry , Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , Shanghai 200032 , China
| | - Jiawei Chen
- Department of Chemistry , Columbia University , 3000 Broadway , New York , New York 10027 , United States
| | - Eugene Y-X Chen
- Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States
| |
Collapse
|
44
|
Weger M, Giuman MM, Knaus MG, Ackermann M, Drees M, Hornung J, Altmann PJ, Fischer RA, Rieger B. Single-Site, Organometallic Aluminum Catalysts for the Precise Group Transfer Polymerization of Michael-Type Monomers. Chemistry 2018; 24:14950-14957. [DOI: 10.1002/chem.201802075] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 07/26/2018] [Indexed: 01/09/2023]
Affiliation(s)
- Michael Weger
- Catalysis Research Center & WACKER-Chair of Macromolecular Chemistry; Technical University of Munich; Lichtenbergstrasse 4 85748 Garching bei München Germany
| | - Marco M. Giuman
- Catalysis Research Center & WACKER-Chair of Macromolecular Chemistry; Technical University of Munich; Lichtenbergstrasse 4 85748 Garching bei München Germany
| | - Maximilian G. Knaus
- Catalysis Research Center & WACKER-Chair of Macromolecular Chemistry; Technical University of Munich; Lichtenbergstrasse 4 85748 Garching bei München Germany
| | - Maximilian Ackermann
- Catalysis Research Center & WACKER-Chair of Macromolecular Chemistry; Technical University of Munich; Lichtenbergstrasse 4 85748 Garching bei München Germany
| | - Markus Drees
- Catalysis Research Center &, Chair of Inorganic and Metal-Organic Chemistry; Technical University of Munich; Lichtenbergstrasse 4 85748 Garching bei München Germany
| | - Julius Hornung
- Catalysis Research Center &, Chair of Inorganic and Metal-Organic Chemistry; Technical University of Munich; Lichtenbergstrasse 4 85748 Garching bei München Germany
| | - Philipp J. Altmann
- Catalysis Research Center &, Chair of Inorganic and Metal-Organic Chemistry; Technical University of Munich; Lichtenbergstrasse 4 85748 Garching bei München Germany
| | - Roland A. Fischer
- Catalysis Research Center &, Chair of Inorganic and Metal-Organic Chemistry; Technical University of Munich; Lichtenbergstrasse 4 85748 Garching bei München Germany
| | - Bernhard Rieger
- Catalysis Research Center & WACKER-Chair of Macromolecular Chemistry; Technical University of Munich; Lichtenbergstrasse 4 85748 Garching bei München Germany
| |
Collapse
|
45
|
Adams F, Pschenitza M, Rieger B. Yttrium‐Catalyzed Synthesis of Bipyridine‐Functionalized AB‐Block Copolymers: Micellar Support for Photocatalytic Active Rhenium‐Complexes. ChemCatChem 2018. [DOI: 10.1002/cctc.201801009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- F. Adams
- WACKER-Lehrstuhl für Makromolekulare Chemie Catalysis Research Center Department of ChemistryTechnische Universität München Lichtenbergstr. 4 Garching bei München 85748 Germany
| | - M. Pschenitza
- WACKER-Lehrstuhl für Makromolekulare Chemie Catalysis Research Center Department of ChemistryTechnische Universität München Lichtenbergstr. 4 Garching bei München 85748 Germany
| | - B. Rieger
- WACKER-Lehrstuhl für Makromolekulare Chemie Catalysis Research Center Department of ChemistryTechnische Universität München Lichtenbergstr. 4 Garching bei München 85748 Germany
| |
Collapse
|
46
|
Nie Y, Zhi X, Du H, Yang J. Zn(OAc)₂-Catalyzing Ring-Opening Polymerization of N-Carboxyanhydrides for the Synthesis of Well-Defined Polypeptides. Molecules 2018; 23:E760. [PMID: 29587473 PMCID: PMC6017970 DOI: 10.3390/molecules23040760] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 03/23/2018] [Accepted: 03/23/2018] [Indexed: 11/16/2022] Open
Abstract
Despite notable progress, the fabrication of well-defined polypeptides via controlled ring-opening polymerization (ROP) of α-amino acid N-carboxyanhydrides (NCAs) using convenient catalysts under mild conditions in a relatively short polymerization time is still challenging. Herein, an easily obtained catalyst system composed of zinc acetate and aniline was explored to mediate the fast ROP of γ-benzyl-l-glutamate-N-carboxyanhydride (BLG-NCA) monomer, to produce poly(γ-benzyl-l-glutamates) (PBLGs) with controllable molecular weights and narrow dispersity. Considering the excellent cooperative action of zinc acetate and a broad scope of aniline derivatives with different functional groups to control ROP of BLG-NCA, this method may offer a useful platform enabling the rapid generation of end-functionalized PBLG and block copolymers for numerous biomedical applications.
Collapse
Affiliation(s)
- Yanzhao Nie
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Xinmei Zhi
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Haifeng Du
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Jing Yang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
| |
Collapse
|
47
|
Chen T, Zhao CQ, Han LB. Hydrophosphorylation of Alkynes Catalyzed by Palladium: Generality and Mechanism. J Am Chem Soc 2018; 140:3139-3155. [DOI: 10.1021/jacs.8b00550] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Tieqiao Chen
- College
of Material and Chemical Engineering, Hainan University, Haikou, Hainan 570228, China
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
| | - Chang-Qiu Zhao
- College
of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
| | - Li-Biao Han
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
| |
Collapse
|
48
|
Adams F, Pahl P, Rieger B. Metal-Catalyzed Group-Transfer Polymerization: A Versatile Tool for Tailor-Made Functional (Co)Polymers. Chemistry 2018; 24:509-518. [PMID: 29044792 DOI: 10.1002/chem.201703965] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Indexed: 01/27/2023]
Abstract
Accommodating the increasing demand for tailor-made polymers is a major goal in polymer chemistry. Therefore, the investigation of polymerization techniques, which allow the precise synthesis of macromolecules is of exceptional interest. Ionic or controlled radical polymerization are capable living-type methods for the generation of uniform polymers. However, even these approaches reach their limits in certain issues. In the last decades, group-transfer polymerization (GTP) and especially metal-catalyzed GTP have proven to give access to a plethora of tailor-made homo- and copolymers based on α,β-unsaturated monomers. Thereby, GTP has established its potential in the development of functional and smart polymers. This concept article highlights the most significant progress in metal-catalyzed GTP with a focus on functional (co)polymers including different polymeric architectures and microstructures.
Collapse
Affiliation(s)
- Friederike Adams
- WACKER-Lehrstuhl für Makromolekulare Chemie, Catalysis Research Center, Department of Chemistry, Technische Universität München, Lichtenbergstr. 4, 85748, Garching bei München, Germany
| | - Philipp Pahl
- WACKER-Lehrstuhl für Makromolekulare Chemie, Catalysis Research Center, Department of Chemistry, Technische Universität München, Lichtenbergstr. 4, 85748, Garching bei München, Germany
| | - Bernhard Rieger
- WACKER-Lehrstuhl für Makromolekulare Chemie, Catalysis Research Center, Department of Chemistry, Technische Universität München, Lichtenbergstr. 4, 85748, Garching bei München, Germany
| |
Collapse
|
49
|
Schwarzenböck C, Schaffer A, Pahl P, Nelson PJ, Huss R, Rieger B. Precise synthesis of thermoresponsive polyvinylphosphonate-biomolecule conjugatesviathiol–ene click chemistry. Polym Chem 2018. [DOI: 10.1039/c7py01796k] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Herein we present the first smart polyvinylphosphonate-bioconjugates obtainedviaan efficient modular synthetic route.
Collapse
Affiliation(s)
- Christina Schwarzenböck
- WACKER–Lehrstuhl für Makromolekulare Chemie
- Technische Universität München
- 85748 Garching bei München
- Germany
| | - Andreas Schaffer
- WACKER–Lehrstuhl für Makromolekulare Chemie
- Technische Universität München
- 85748 Garching bei München
- Germany
| | - Philipp Pahl
- WACKER–Lehrstuhl für Makromolekulare Chemie
- Technische Universität München
- 85748 Garching bei München
- Germany
| | - Peter J. Nelson
- Medizinische Klinik und Poliklinik IV
- Nephrologisches Zentrum und Arbeitsgruppe Klinische Biochemie
- University of Munich
- Munich
- Germany
| | | | - Bernhard Rieger
- WACKER–Lehrstuhl für Makromolekulare Chemie
- Technische Universität München
- 85748 Garching bei München
- Germany
| |
Collapse
|
50
|
Wang W, Shen X, Zhao F, Jiang H, Yao W, Pullarkat SA, Xu L, Ma M. Ytterbium-Catalyzed Hydroboration of Aldehydes and Ketones. J Org Chem 2017; 83:69-74. [PMID: 29181979 DOI: 10.1021/acs.joc.7b02076] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The well-defined heavy rare-earth ytterbium iodide complex 1 (L2YbI) has been successfully employed as an efficient catalyst for the hydroboration of a wide range of aldehydes and ketones with pinacolborane (HBpin) at room temperature. The protocol requires low catalyst loadings (0.1-0.5 mol %) and proceeds rapidly (>99% conversion in <10 min). Additionally, catalyst 1 shows a good functional group tolerance even toward the hydroxyl and amino moieties and displays chemoselective hydroboration of aldehydes over ketones under mild conditions.
Collapse
Affiliation(s)
- Weifan Wang
- College of Science, Nanjing Forestry University , Nanjing 210037, People's Republic of China
| | - Xingchao Shen
- College of Science, Nanjing Forestry University , Nanjing 210037, People's Republic of China
| | - Fengyi Zhao
- College of Science, Nanjing Forestry University , Nanjing 210037, People's Republic of China
| | - Huan Jiang
- College of Science, Nanjing Forestry University , Nanjing 210037, People's Republic of China
| | - Weiwei Yao
- College of Pharmacy, Nanjing University of Chinese Medicine , Nanjing 210023, People's Republic of China
| | - Sumod A Pullarkat
- Division of Chemistry & Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore 637371, Singapore
| | - Li Xu
- College of Science, Nanjing Forestry University , Nanjing 210037, People's Republic of China
| | - Mengtao Ma
- College of Science, Nanjing Forestry University , Nanjing 210037, People's Republic of China
| |
Collapse
|