1
|
Cooper EN, Averkiev B, Day VW, Sues PE. Ring-Opening Polymerization of ε-Caprolactone Utilizing Aluminum Alkyl Complexes Bearing Dianionic Scorpionate Ligands. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Elizabeth N. Cooper
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66503, United States
| | - Boris Averkiev
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66503, United States
| | - Victor W. Day
- Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
| | - Peter E. Sues
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66503, United States
| |
Collapse
|
2
|
McCollum AM, Longo AM, Stahl AE, Butler AS, Rheingold AL, Cundari TR, Green DB, Brereton KR, Fritsch JM. Synthesis, spectroscopy, and crystallography of mononuclear, five-coordinate aluminum complexes that act as cyclic ester polymerization initiators. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115233] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
3
|
Chang CJ, Chiu CF, Wu KH, Chang YL, Lai YC, Ding S, Chen HY. N-heterocyclic ligand optimization for aluminum complexes in ε-caprolactone and L-Lactide polymerization. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122572] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
4
|
Nie K, Wang C, Cheng X, Li J, Han Y, Yao Y. Unbridged bidentate aluminum complexes supported by diaroylhydrazone ligands: Synthesis, structure and catalysis in polymerization of
ε
‐caprolactone and lactides. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5627] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Kun Nie
- School of Chemistry and Chemical EngineeringTaishan University Taian 271000 China
| | - Changan Wang
- School of Chemistry and Chemical EngineeringTaishan University Taian 271000 China
| | - Xueli Cheng
- School of Chemistry and Chemical EngineeringTaishan University Taian 271000 China
| | - Jikun Li
- School of Chemistry and Chemical EngineeringTaishan University Taian 271000 China
| | - Yinfeng Han
- School of Chemistry and Chemical EngineeringTaishan University Taian 271000 China
| | - Yingming Yao
- College of Chemistry, Chemical Engineering and Materials ScienceSoochow University Suzhou 215123 China
| |
Collapse
|
5
|
Yu CJ, Li CY, Tsai CY, Ko BT. Titanium, zirconium and hafnium complexes bearing amino-benzotriazole phenolate ligands as efficient catalysts for ring-opening polymerization of lactides. INORG CHEM COMMUN 2019. [DOI: 10.1016/j.inoche.2019.107561] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
6
|
Harinath A, Bhattacharjee J, Sarkar A, Panda TK. Alkali metal complex-mediated ring-opening polymerization of rac-LA, ε-caprolactone, and δ-valerolactone. NEW J CHEM 2019. [DOI: 10.1039/c9nj01130g] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Catalytic ring opening polymerization (ROP) of rac-lactide, ε-caprolactone, and δ-valerolactone using alkali metal (Li, Na, K) complexes as competent catalysts are reported.
Collapse
Affiliation(s)
- Adimulam Harinath
- Department of Chemistry
- Indian Institute of Technology Hyderabad Kandi – 502 285
- Sangareddy
- India
| | - Jayeeta Bhattacharjee
- Department of Chemistry
- Indian Institute of Technology Hyderabad Kandi – 502 285
- Sangareddy
- India
| | - Alok Sarkar
- Momentive Performance Materials Pvt. Ltd
- Bangalore – 560 100
- India
| | - Tarun K. Panda
- Department of Chemistry
- Indian Institute of Technology Hyderabad Kandi – 502 285
- Sangareddy
- India
| |
Collapse
|
7
|
Zhang Q, Zhang W, Solan GA, Liang T, Sun WH. Bimetallic Aluminum 5,6-Dihydro-7,7-dimethyl quinolin-8-olates as Pro-Initiators for the ROP of ε-CL; Probing the Nuclearity of the Active Initiator. Polymers (Basel) 2018; 10:E764. [PMID: 30960689 PMCID: PMC6403881 DOI: 10.3390/polym10070764] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Revised: 07/10/2018] [Accepted: 07/10/2018] [Indexed: 11/16/2022] Open
Abstract
Six examples of aluminum 5,6-dihydro-7,7-dimethylquinolin-8-olates, [{2-R¹-7,7-Me₂-8-R²C₉H₆N-8-O}AlR³₂]₂ (R¹ = R² = H, R³ = Me C1; R¹ = R² = H, R³ = Et C2; R¹ = R² = H, R³ = i-Bu C3; R¹ = Cl, R² = H, R³ = Me C4; R¹ = H, R² = R³ = Me C5; R¹ = Cl, R² = R³ = Me C6), have been prepared by treating the corresponding pro-ligand (L1⁻L4) with either AlMe₃, AlEt₃ or Al(i-Bu)₃. All complexes have been characterized by ¹H and 13C NMR spectroscopy and in the case of C1 and C4 by single crystal X-ray diffraction; dimeric species are a feature of their molecular structures. In the presence of PhCH₂OH (BnOH), C1⁻C6 displayed good control and efficiency for the ROP of ε-CL with almost 100% conversion achievable in 10 min at 90 °C; the chloro-substituted C4 and C6 notably exhibited the lowest activity of the series. However, in the absence of BnOH, C1 showed only low activity with 15% conversion achieved in 30 min forming a linear polymer capped with either a methyl or a L1 group. By contrast, when one or more equivalents of BnOH was employed in combination with C1, the resulting catalyst was not only more active but gave linear polymers capped with BnO end-groups. By using ¹H and 27Al NMR spectroscopy to monitor solutions of C1, C1/BnOH and C1/BnOH/10 ε-CL over a range of temperatures, some support for a monomeric species being the active initiator at the operational temperature is presented.
Collapse
Affiliation(s)
- Qiurui Zhang
- Beijing Key Laboratory of Clothing Materials R&D and Assessment, Beijing Engineering Research Center of Textile Nanofiber, School of Materials Science and Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China.
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Wenjuan Zhang
- Beijing Key Laboratory of Clothing Materials R&D and Assessment, Beijing Engineering Research Center of Textile Nanofiber, School of Materials Science and Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China.
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Gregory A Solan
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
- Department of Chemistry, University of Leicester, University Road, Leicester LE1 7RH, UK.
| | - Tongling Liang
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Wen-Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| |
Collapse
|
8
|
Schmitz LA, McCollum AM, Rheingold AL, Green DB, Fritsch JM. Synthesis and structures of aluminum ion-pair complexes that act as L- and racemic-lactide ring opening polymerization initiators. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.03.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
9
|
Harinath A, Bhattacharjee J, Sarkar A, Nayek HP, Panda TK. Ring Opening Polymerization and Copolymerization of Cyclic Esters Catalyzed by Group 2 Metal Complexes Supported by Functionalized P–N Ligands. Inorg Chem 2018; 57:2503-2516. [DOI: 10.1021/acs.inorgchem.7b02847] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Adimulam Harinath
- Department of Chemistry, Indian Institute of Technology Hyderabad Kandi 502 285, Sangareddy, Telangana, India
| | - Jayeeta Bhattacharjee
- Department of Chemistry, Indian Institute of Technology Hyderabad Kandi 502 285, Sangareddy, Telangana, India
| | - Alok Sarkar
- Momentive Performance
Materials Pvt. Ltd., Bangalore 560 100, India
| | - Hari Pada Nayek
- Department of Applied Chemistry, Indian Institute of Technology (ISM), Dhanbad 826 004, Jharkhand, India
| | - Tarun K. Panda
- Department of Chemistry, Indian Institute of Technology Hyderabad Kandi 502 285, Sangareddy, Telangana, India
| |
Collapse
|
10
|
Bhattacharjee J, Harinath A, Nayek HP, Sarkar A, Panda TK. Highly Active and Iso-Selective Catalysts for the Ring-Opening Polymerization of Cyclic Esters using Group 2 Metal Initiators. Chemistry 2017; 23:9319-9331. [DOI: 10.1002/chem.201700672] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Jayeeta Bhattacharjee
- Department of Chemistry; Indian Institute of Technology Hyderabad; Kandi 502 285, Sangareddy, Telangana India
| | - Adimulam Harinath
- Department of Chemistry; Indian Institute of Technology Hyderabad; Kandi 502 285, Sangareddy, Telangana India
| | - Hari Pada Nayek
- Department of Applied Chemistry; Indian Institute of Technology (ISM), Dhanbad; 826004 Jharkhand India
| | - Alok Sarkar
- Momentive Performance Materials Pvt. Ltd. Survey No. 09; Hosur Road Electronic City (West) Bangalore 560100 India
| | - Tarun K. Panda
- Department of Chemistry; Indian Institute of Technology Hyderabad; Kandi 502 285, Sangareddy, Telangana India
| |
Collapse
|
11
|
Rajendran NM, Xi Y, Zhang W, Sun Y, Sun W. Lithium Quinolyl‐Amidinates Efficiently Promoting Ring‐Opening Polymerization of ε‐Caprolactone: Synthesis and
7
Li NMR Spectroscopic Studies. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700135] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Natesan Mannangatti Rajendran
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences 100190 Beijing China
| | - Yanxia Xi
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences 100190 Beijing China
| | - Wenjuan Zhang
- School of Materials Science and Engineering Beijing Institute of Fashion Technology 100029 Beijing China
| | - Yang Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences 100190 Beijing China
| | - Wen‐Hua Sun
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences 100190 Beijing China
| |
Collapse
|
12
|
Zhang D, Pang W, Chen C. Sidearm effect on the (Pyrrolylaldiminato)aluminum initiated ring opening polymerization of ε-caprolactone. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.03.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
13
|
Sarazin Y, Carpentier JF. Calcium, Strontium and Barium Homogeneous Catalysts for Fine Chemicals Synthesis. CHEM REC 2016; 16:2482-2505. [PMID: 27353504 DOI: 10.1002/tcr.201600067] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Indexed: 01/22/2023]
Abstract
The large alkaline earths (Ae), calcium, strontium and barium, have in the past 15 years yielded a brand new generation of heteroleptic molecular catalysts for the production of fine chemicals. However, the integrity of these complexes is often plagued by ligand redistribution equilibria in solution. This personal account retraces the paths followed in our research group towards the design of stable heteroleptic alkalino-earth complexes, including the use of intramolecular noncovalent Ae···H-Si and Ae···F-C interactions. Their implementation as homogenous precatalysts for reactions such as the intramolecular and intermolecular hydroamination and hydrophosphination of activated alkenes, the hydrophosphonylation of ketones, and the dehydrogenative coupling of amines and hydrosilanes that enable the efficient and controlled formations of CP, CN, or SiN σ-bonds, is presented in a synthetic perspective that highlights their overall outstanding catalytic performance.
Collapse
Affiliation(s)
- Yann Sarazin
- Organometallics: Materials and Catalysis, Institut des Sciences Chimiques de Rennes UMR 6226 CNRS - Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France
| | - Jean-François Carpentier
- Organometallics: Materials and Catalysis, Institut des Sciences Chimiques de Rennes UMR 6226 CNRS - Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France
| |
Collapse
|
14
|
Duan YL, He JX, Wang W, Zhou JJ, Huang Y, Yang Y. Synthesis and characterization of dinuclear rare-earth complexes supported by amine-bridged bis(phenolate) ligands and their catalytic activity for the ring-opening polymerization of l-lactide. Dalton Trans 2016; 45:10807-20. [PMID: 27294827 DOI: 10.1039/c6dt01486k] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reactions of amine-bridged bis(phenolate) protio-ligands N,N-bis(3,5-di-tert-butyl-2-hydroxybenzyl)aminoacetic acid (L(1)-H3) and N,N-bis[3,5-bis(α,α'-dimethylbenzyl)-2-hydroxybenzyl]aminoacetic acid (L(2)-H3), with 1 equiv. M[N(SiMe3)2]3 (M = La, Nd, Sm, Gd, Y) in THF at room temperature yielded the neutral rare-earth complexes [M2(L)2(THF)4] (L = L(1), M = La (), Nd (), Sm (), Gd (), Y (); L = L(2), M = La (), Nd (), Sm (), Gd (), Y ()). All of these complexes were characterized by single-crystal X-ray diffraction, elemental analysis and in the case of yttrium and lanthanum complexes, (1)H NMR spectroscopy. The molecular structure of revealed dinuclear species in which the eight-coordinate lanthanum centers were bonded to two oxygen atoms of two THF molecules, to three oxygen atoms and one nitrogen atom of one L(1) ligand, and two oxygen atoms of the carboxyl group of another. Complexes were also dinuclear species containing seven-coordinate metal centers similar to , albeit with bonding to one rather than two carboxyl group oxygens of another ligand. Further treatment of with excess benzyl alcohol provided dinuclear complex [La2(L(1))2(BnOH)6] (), in which each lanthanum ion is eight-coordinate, bonded to three oxygen atoms and one nitrogen atom of one ligand, three oxygen atoms of three BnOH molecules, as well as one oxygen atom of bridging carboxyl group of the other ligand. In the presence of BnOH, complexes efficiently catalyzed the ring-opening polymerization of l-lactide in a controlled manner and gave polymers with relatively narrow molecular weight distributions. The kinetic and mechanistic studies associated with the ROP of l-lactide using /BnOH initiating system have been performed.
Collapse
Affiliation(s)
- Yu-Lai Duan
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, P. R. China.
| | - Jia-Xuan He
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, P. R. China.
| | - Wei Wang
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, P. R. China.
| | - Jing-Jing Zhou
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, P. R. China.
| | - Yong Huang
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, P. R. China.
| | - Ying Yang
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, P. R. China.
| |
Collapse
|
15
|
Rajashekhar B, Roymuhury SK, Chakraborty D, Ramkumar V. Group 4 metal complexes of Trost's semi-crown ligand: synthesis, structural characterization and studies on the ring-opening polymerization of lactides and ε-caprolactone. Dalton Trans 2016; 44:16280-93. [PMID: 26262508 DOI: 10.1039/c5dt02267c] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of titanium(IV), zirconium(IV) and hafnium(IV) complexes of Trost's semi-crown ligand is described. All complexes were fully characterized by 1H and 13C NMR and mass spectroscopy. The molecular structures of the representative complexes 2, 3 and 4 were determined by single-crystal X-ray diffraction studies. The X-ray diffraction studies reveal that complexes 2, 3 and 4 crystallized in an orthorhombic crystal system. Complexes 2 and 3 have a monomeric structure in the solid state with distorted octahedral geometry around the metal center, whereas complex 4 was found to crystallize in a trimeric structure bridging with an oxygen atom, where the geometry around the titanium is distorted trigonal bipyramidal. The activities and stereoselectivities of these complexes toward the ring-opening polymerization (ROP) of lactides (L-LA and rac-LA) and ε-caprolactone (CL) have been investigated. Complexes 1–4 were found to be efficient single-component initiators for the ring-opening polymerization of cyclic esters and yielded high molecular weight polymers (Mn) with narrow molecular weight distributions (MWD).The microstructure of the resultant polylactides (PLAs) from rac-LA was determined. Complexes 2 and 3 afforded isotactic-enriched PLA (Pm = 0.78–0.71) with narrow MWD (1.07–1.04), on the other hand complexes 1 and 4 produced atactic PLA. Kinetic and post polymerization studies confirm that the polymerization proceeds through the coordination–insertion mechanism.
Collapse
Affiliation(s)
- Bijja Rajashekhar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600 036, Tamil Nadu, India.
| | | | | | | |
Collapse
|
16
|
Wei Y, Wang S, Zhou S. Aluminum alkyl complexes: synthesis, structure, and application in ROP of cyclic esters. Dalton Trans 2016; 45:4471-85. [PMID: 26876985 DOI: 10.1039/c5dt04240b] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Aluminum alkyl complexes have very useful applications as catalysts or reagents in small molecule transformations and as cocatalysts in olefin polymerization. This short review focuses on some recent developments in the design, synthesis and structure of aluminum(iii) alkyl complexes supported by various ligands bearing nitrogen, oxygen, sulfur or phosphorus atoms, and their catalytic applications in the ring-opening polymerization (ROP) of cyclic esters. The coordination chemistry of the Al metal centre and the catalytic activity changes of the complexes caused by ligand modifications are also discussed.
Collapse
Affiliation(s)
- Yun Wei
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, School of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, P. R. China.
| | | | | |
Collapse
|
17
|
Sumrit P, Chuawong P, Nanok T, Duangthongyou T, Hormnirun P. Aluminum complexes containing salicylbenzoxazole ligands and their application in the ring-opening polymerization of rac-lactide and ε-caprolactone. Dalton Trans 2016; 45:9250-66. [DOI: 10.1039/c6dt00990e] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two series of aluminum complexes supported by salicylbenzoxazole ligands were successfully synthesized and applied as active initiators for the ring-opening polymerization of rac-LA and ε-CL.
Collapse
Affiliation(s)
- Pattarawut Sumrit
- Laboratory of Catalysts and Advanced Polymer Materials
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Kasetsart University
- Bangkok 10900
| | - Pitak Chuawong
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- and Special Research Unit for Advanced Magnetic Resonance (AMR)
- Kasetsart University
- Bangkok 10900
| | - Tanin Nanok
- Department of Chemistry
- Faculty of Science
- Kasetsart University
- Bangkok 10900
- Thailand
| | | | - Pimpa Hormnirun
- Laboratory of Catalysts and Advanced Polymer Materials
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Kasetsart University
- Bangkok 10900
| |
Collapse
|
18
|
Meduri A, Cozzolino M, Milione S, Press K, Sergeeva E, Tedesco C, Mazzeo M, Lamberti M. Yttrium and aluminium complexes bearing dithiodiolate ligands: synthesis and application in cyclic ester polymerization. Dalton Trans 2015; 44:17990-8000. [PMID: 26406112 DOI: 10.1039/c5dt02938d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Yttrium and aluminium complexes of two dithiodiolate ligands that feature different bridges (CF3)2C(OH)CH2SRSCH2C(OH)(CF3)2 (L(1)-H2, R = CH2CH2 and L(2)-H2, R = C6H4) were synthesized in good yields by reacting tris(silylamide)yttrium or trimethylaluminium with one equivalent of the proligand. All complexes were characterized by NMR and elemental analysis, and single-crystal X-ray structural analysis was also performed for one of the yttrium complexes. The catalytic activities of the four complexes in the ring-opening polymerization of ε-caprolactone and rac-lactide have been investigated. Furthermore, DOSY experiment and DFT calculations have been carried out to determine the structure of the isopropoxo derivative of the complex L(2)Y amide.
Collapse
Affiliation(s)
- A Meduri
- Dipartimento di Chimica e Biologia, Università di Salerno, via Giovanni Paolo II 132, I-84084, Fisciano, Salerno, Italy
| | | | | | | | | | | | | | | |
Collapse
|
19
|
Zinc complexes chelated by bifunctional ketiminate ligands: Structure, reactivity and possible applications in initiation of ROP and copolymerization of epoxides with carbon dioxide. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.07.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
20
|
Dimethyl-Aluminium Complexes Bearing Naphthyl-Substituted Pyridine-Alkylamides as Pro-Initiators for the Efficient ROP of ε-Caprolactone. Catalysts 2015. [DOI: 10.3390/catal5031425] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
21
|
Wang JH, Tsai CY, Su JK, Huang BH, Lin CC, Ko BT. Mono-, di- and tetra-zinc complexes derived from an amino-benzotriazole phenolate ligand containing a bulkier N-alkyl pendant arm: synthesis, structure and catalysis for ring-opening polymerization of cyclic esters. Dalton Trans 2015; 44:12401-10. [PMID: 25727459 DOI: 10.1039/c4dt02906b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Zinc complexes constructed from the amino-modified benzotriazole phenol pro-ligand, 2-(2H-benzotriazol-2-yl)-6-((diisopropylamino)methyl)-4-(2,4,4-trimethylpentan-2-yl)phenol ((C8DIA)BTP-H, 1), were synthesized stepwise and structurally characterized. The reaction of (C8DIA)BTP-H (1) with one equivalent of diethyl zinc (ZnEt2) generates a dimeric and four-coordinated zinc complex, [(μ-(C8DIA)BTP)ZnEt]2 (2), which is doubly bridged by two phenolate groups of C8DIABTP ligands. Further reaction of 2 with benzyl alcohol (BnOH) in stoichiometric proportions affords a tetranuclear zinc benzylalkoxide complex [(μ-OBn)((C8DIA)BTP)Zn]4 (3) that possesses a saddle-shaped core with four μ2-bridging benzylalkoxy groups upon four Zn centres. Interestingly, the di-nuclear Zn alkoxide [(μ-OBn)((C8DIA)BTP)Zn(DMAP)]2 (4) could be prepared by treatment of 3 with a stoichiometric amount of 4-(dimethylamino)pyridine (DMAP). ZnEt2 reacts with two equivalents of 1 in the presence of DMAP (1.0 mol equiv.) to yield a five-coordinated mononuclear zinc complex, [((C8DIA)BTP)2Zn(DMAP)] (5). All complexes adopt an N,O-bidentate coordination mode from the phenoxy oxygen atom and benzotriazole nitrogen atom, in which the nitrogen atom of the pendent arm substituent is not coordinated to the zinc centre. Ring-opening polymerization of ε-caprolactone and β-butyrolactone catalysed by 2 and 3 was investigated.
Collapse
Affiliation(s)
- Jun-Han Wang
- Department of Chemistry, Chung Yuan Christian University, Chung-Li 320, Taiwan
| | | | | | | | | | | |
Collapse
|
22
|
Mishra S, Daniele S. Metal-Organic Derivatives with Fluorinated Ligands as Precursors for Inorganic Nanomaterials. Chem Rev 2015; 115:8379-448. [PMID: 26186083 DOI: 10.1021/cr400637c] [Citation(s) in RCA: 107] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Shashank Mishra
- Institut de Recherches sur la Catalyse et l'Environnement de Lyon (IRCELYON), UMR 5256, Université Claude Bernard Lyon1 , 2 avenue Albert Einstein, 69626 Villeurbanne, France
| | - Stéphane Daniele
- Institut de Recherches sur la Catalyse et l'Environnement de Lyon (IRCELYON), UMR 5256, Université Claude Bernard Lyon1 , 2 avenue Albert Einstein, 69626 Villeurbanne, France
| |
Collapse
|
23
|
Jones MD, Brady L, McKeown P, Buchard A, Schäfer PM, Thomas LH, Mahon MF, Woodman TJ, Lowe JP. Metal influence on the iso- and hetero-selectivity of complexes of bipyrrolidine derived salan ligands for the polymerisation of rac-lactide. Chem Sci 2015; 6:5034-5039. [PMID: 29142728 PMCID: PMC5664169 DOI: 10.1039/c5sc01819f] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Accepted: 06/17/2015] [Indexed: 11/30/2022] Open
Abstract
A series complexes based on 2,2′-bipyrrolidine based salan ligands have been prepared and either isotactic or heterotactic PLA have been prepared.
In this paper we have prepared a series of Ti(iv), Hf(iv) and Al(iii) complexes based on bipyrrolidine salan pro-ligands. The Hf(iv) complexes have all been characterised in the solid-state, the chiral ligands coordinate to Hf(iv) in an α-cis manner whereas the meso ligand coordinates in a β-cis geometry. The Hf(iv) complexes are all active for the ROP of rac-lactide in the melt, with the fluxional meso complex affording a strong isotactic bias Pm = 0.84. As expected Hf(3)(OiPr)2 polymerised l-LA faster than rac-LA (kapp = 5.9 × 10–3 min–1vs. 3.8 × 10–3 min–1). For Ti(iv) complexes atactic PLA was formed. The salan pro-ligands have also been complexed to Al(iii), and the novel Al–Me and Al-OiPr complexes were characterised in the solid and solution state. Al(1)(OiPr) was fluxional on the NMR timescale, whereas Al(3)(OiPr) was locked in solution with no exchange. Interestingly, the Al(iii) complexes of 3H2 produce PLA with a very strong heterotactic bias Pr upto 0.87, whereas atactic PLA is produced with 1H2. For Al(3)(OiPr) a linear relationship is observed with Mn and conversion. Experiments with the addition of an equivalent of rac-LA to the selective initiators have also been performed and are discussed.
Collapse
Affiliation(s)
- Matthew D Jones
- Department of Chemistry , University of Bath , Claverton Down , Bath BA2 7AY , UK . ; ; Tel: +44 (0)1225 384908
| | - Lauren Brady
- Department of Chemistry , University of Bath , Claverton Down , Bath BA2 7AY , UK . ; ; Tel: +44 (0)1225 384908
| | - Paul McKeown
- Department of Chemistry , University of Bath , Claverton Down , Bath BA2 7AY , UK . ; ; Tel: +44 (0)1225 384908.,Doctoral Training Centre in Sustainable Chemical Technologies , University of Bath , Bath BA2 7AY , UK
| | - Antoine Buchard
- Department of Chemistry , University of Bath , Claverton Down , Bath BA2 7AY , UK . ; ; Tel: +44 (0)1225 384908
| | - Pascal M Schäfer
- Department of Chemistry , University of Bath , Claverton Down , Bath BA2 7AY , UK . ; ; Tel: +44 (0)1225 384908
| | - Lynne H Thomas
- Department of Chemistry , University of Bath , Claverton Down , Bath BA2 7AY , UK . ; ; Tel: +44 (0)1225 384908
| | - Mary F Mahon
- Bath Chemical Crystallography Unit , Department of Chemistry , University of Bath , Claverton Down , Bath , BA2 7AY , UK
| | - Timothy J Woodman
- Department of Chemistry , University of Bath , Claverton Down , Bath BA2 7AY , UK . ; ; Tel: +44 (0)1225 384908
| | - John P Lowe
- Department of Chemistry , University of Bath , Claverton Down , Bath BA2 7AY , UK . ; ; Tel: +44 (0)1225 384908
| |
Collapse
|
24
|
Li M, Chen M, Chen C. Ring-opening polymerization of rac-lactide using anilinotropone-based aluminum complexes-sidearm effect on the catalysis. POLYMER 2015. [DOI: 10.1016/j.polymer.2014.11.060] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
25
|
Methoxyaryl substituted aluminum ketiminate complexes and its activity in ring opening polymerization processes. INORG CHEM COMMUN 2015. [DOI: 10.1016/j.inoche.2015.03.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
26
|
Plommer H, Reim I, Kerton FM. Ring-opening polymerization of cyclohexene oxide using aluminum amine–phenolate complexes. Dalton Trans 2015; 44:12098-102. [DOI: 10.1039/c5dt00220f] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Al(iii) catalysts at concentrations as low as 0.001% ring-open cyclohexene oxide to yield high molecular weight polyether with narrow dispersity.
Collapse
Affiliation(s)
- Hart Plommer
- Department of Chemistry
- Memorial University of Newfoundland
- St. John's
- Canada
| | - Immanuel Reim
- Department of Chemistry
- Memorial University of Newfoundland
- St. John's
- Canada
| | | |
Collapse
|
27
|
Kireenko MM, Kuchuk EA, Zaitsev KV, Tafeenko VA, Oprunenko YF, Churakov AV, Lermontova EK, Zaitseva GS, Karlov SS. Aluminum complexes based on pyridine substituted alcohols: synthesis, structure, and catalytic application in ROP. Dalton Trans 2015; 44:11963-76. [DOI: 10.1039/c5dt01001b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
2,6-Bis(hydroxyalkyl)pyridines were used in the synthesis of Al complexes. The structure of the ligand determines the complex nature. Compounds were used as initiators of lactone ROP.
Collapse
Affiliation(s)
| | | | | | | | | | - Andrei V. Churakov
- Institute of General and Inorganic Chemistry
- Russian Acad. Sci
- 119991 Moscow
- Russia
| | | | | | | |
Collapse
|
28
|
Bakewell C, Fateh-Iravani G, Beh DW, Myers D, Tabthong S, Hormnirun P, White AJP, Long N, Williams CK. Comparing a series of 8-quinolinolato complexes of aluminium, titanium and zinc as initiators for the ring-opening polymerization of rac-lactide. Dalton Trans 2015; 44:12326-37. [DOI: 10.1039/c5dt00192g] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The preparation, characterization and properties of a series of 8-hydroxy quinolinolate complexes of Ti(iv), Al(iii) and Zn(ii) are presented. The complexes are active initiators for rac-lactide polymerizations: their performances are compared.
Collapse
Affiliation(s)
- Clare Bakewell
- Department of Chemistry
- Imperial College London
- London SW7 2AZ
- UK
| | | | - Daniel W. Beh
- Department of Chemistry
- Imperial College London
- London SW7 2AZ
- UK
| | - Dominic Myers
- Department of Chemistry
- Imperial College London
- London SW7 2AZ
- UK
| | - Sittichoke Tabthong
- Department of Chemistry
- Faculty of Science
- Kasetsart University
- Bangkok 10900
- Thailand
| | - Pimpa Hormnirun
- Department of Chemistry
- Faculty of Science
- Kasetsart University
- Bangkok 10900
- Thailand
| | | | - Nicholas Long
- Department of Chemistry
- Imperial College London
- London SW7 2AZ
- UK
| | | |
Collapse
|
29
|
Bakewell C, White AJP, Long NJ, Williams CK. Metal-size influence in iso-selective lactide polymerization. Angew Chem Int Ed Engl 2014; 53:9226-30. [PMID: 25044165 PMCID: PMC4499264 DOI: 10.1002/anie.201403643] [Citation(s) in RCA: 156] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Indexed: 11/08/2022]
Abstract
Iso-selective initiators for the ring-opening polymerization (ROP) of rac-lactide are rare outside of Group 13. We describe the first examples of highly iso-selective lutetium initiators. The phosphasalen lutetium ethoxide complex shows excellent iso-selectivity, with a P(i) value of 0.81-0.84 at 298 K, excellent rates, and high degrees of polymerization control. Conversely, the corresponding La derivative exhibits moderate heteroselectivity (P(s)=0.74, 298 K). Thus, the choice of metal center is shown to be crucial in determining the level and mode of stereocontrol. The relative order of rates for the series of complexes is inversely related to metallic covalent radius: that is, La>Y>Lu.
Collapse
Affiliation(s)
- Clare Bakewell
- Department of Chemistry, Imperial College LondonSouth Kensington (UK)
| | - Andrew J P White
- Department of Chemistry, Imperial College LondonSouth Kensington (UK)
| | - Nicholas J Long
- Department of Chemistry, Imperial College LondonSouth Kensington (UK)
| | | |
Collapse
|
30
|
Bakewell C, White AJP, Long NJ, Williams CK. Metal-Size Influence in Iso-Selective Lactide Polymerization. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403643] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
31
|
Maudoux N, Roisnel T, Carpentier JF, Sarazin Y. Aluminum, Indium, and Mixed Yttrium–Lithium Complexes Supported by a Chiral Binap-Based Fluorinated Dialkoxide: Structural Features and Heteroselective ROP of Lactide. Organometallics 2014. [DOI: 10.1021/om500458g] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Nicolas Maudoux
- Institut
des Sciences Chimiques de Rennes, Organometallics: Materials and Catalysis
Laboratories, UMR 6226 CNRS-Université de Rennes 1, F-35042 Rennes Cedex, France
| | - Thierry Roisnel
- Institut
des Sciences Chimiques de Rennes, Centre de Diffraction X, UMR 6226 CNRS-Université de Rennes 1, F-35042 Rennes
Cedex, France
| | - Jean-François Carpentier
- Institut
des Sciences Chimiques de Rennes, Organometallics: Materials and Catalysis
Laboratories, UMR 6226 CNRS-Université de Rennes 1, F-35042 Rennes Cedex, France
| | - Yann Sarazin
- Institut
des Sciences Chimiques de Rennes, Organometallics: Materials and Catalysis
Laboratories, UMR 6226 CNRS-Université de Rennes 1, F-35042 Rennes Cedex, France
| |
Collapse
|
32
|
Romain C, Fliedel C, Bellemin-Laponnaz S, Dagorne S. NHC Bis-Phenolate Aluminum Chelates: Synthesis, Structure, and Use in Lactide and Trimethylene Carbonate Polymerization. Organometallics 2014. [DOI: 10.1021/om5004557] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Charles Romain
- Institut de Chimie
de Strasbourg, CNRS UMR
7177, Université de Strasbourg, 1 rue Blaise Pascal, 67000 Strasbourg, France
| | - Christophe Fliedel
- Institut de Chimie
de Strasbourg, CNRS UMR
7177, Université de Strasbourg, 1 rue Blaise Pascal, 67000 Strasbourg, France
| | - Stéphane Bellemin-Laponnaz
- Institut de Physique et Chimie
des Matériaux
de Strasbourg, CNRS UMR 7504, Université de Strasbourg, 23 rue
du Loess, BP 43, F-67034 Strasbourg Cedex 2, France
- Université de Strasbourg Institute for Advanced Study (USIAS), 5 allée du Général Rouvillois, 67083 Strasbourg, France
| | - Samuel Dagorne
- Institut de Chimie
de Strasbourg, CNRS UMR
7177, Université de Strasbourg, 1 rue Blaise Pascal, 67000 Strasbourg, France
| |
Collapse
|
33
|
Roşca SC, Roisnel T, Dorcet V, Carpentier JF, Sarazin Y. Potassium and Well-Defined Neutral and Cationic Calcium Fluoroalkoxide Complexes: Structural Features and Reactivity. Organometallics 2014. [DOI: 10.1021/om500343w] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Sorin-Claudiu Roşca
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Thierry Roisnel
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Vincent Dorcet
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Jean-François Carpentier
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Yann Sarazin
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| |
Collapse
|
34
|
Nakata N, Saito Y, Ishii A. Neutral Methyl and Cationic Aluminum Complexes Supported by a trans-1,2-Cyclooctanediyl-Bridged [OSSO]-Type Bis(phenolato) Ligand: Synthesis, Structures, and Use in Catalysis for Propylene Oxide Polymerization. Organometallics 2014. [DOI: 10.1021/om5001698] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Norio Nakata
- Department
of Chemistry, Graduate School of Science and Engineering, Saitama University, Shimo-okubo,
Sakura-ku, Saitama 338-8570, Japan
| | - Yusuke Saito
- Department
of Chemistry, Graduate School of Science and Engineering, Saitama University, Shimo-okubo,
Sakura-ku, Saitama 338-8570, Japan
| | - Akihiko Ishii
- Department
of Chemistry, Graduate School of Science and Engineering, Saitama University, Shimo-okubo,
Sakura-ku, Saitama 338-8570, Japan
| |
Collapse
|
35
|
Honrado M, Otero A, Fernández-Baeza J, Sánchez-Barba LF, Garcés A, Lara-Sánchez A, Rodrı́guez AM. Stereoselective ROP of rac-Lactide Mediated by Enantiopure NNO-Scorpionate Zinc Initiators. Organometallics 2014. [DOI: 10.1021/om500207x] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Manuel Honrado
- Departamento de
Quı́mica Inorgánica,
Orgánica y Bioquı́mica, Universidad de Castilla-La Mancha, Campus Universitario, 13071 Ciudad Real, Spain
| | - Antonio Otero
- Departamento de
Quı́mica Inorgánica,
Orgánica y Bioquı́mica, Universidad de Castilla-La Mancha, Campus Universitario, 13071 Ciudad Real, Spain
| | - Juan Fernández-Baeza
- Departamento de
Quı́mica Inorgánica,
Orgánica y Bioquı́mica, Universidad de Castilla-La Mancha, Campus Universitario, 13071 Ciudad Real, Spain
| | - Luis F. Sánchez-Barba
- Departamento de Quı́mica Inorgánica
y Analı́tica, Universidad Rey Juan Carlos, Móstoles, 28933 Madrid, Spain
| | - Andrés Garcés
- Departamento de Quı́mica Inorgánica
y Analı́tica, Universidad Rey Juan Carlos, Móstoles, 28933 Madrid, Spain
| | - Agustı́n Lara-Sánchez
- Departamento de
Quı́mica Inorgánica,
Orgánica y Bioquı́mica, Universidad de Castilla-La Mancha, Campus Universitario, 13071 Ciudad Real, Spain
| | - Ana M. Rodrı́guez
- Departamento de
Quı́mica Inorgánica,
Orgánica y Bioquı́mica, Universidad de Castilla-La Mancha, Campus Universitario, 13071 Ciudad Real, Spain
| |
Collapse
|
36
|
Chuang HJ, Wu BH, Li CY, Ko BT. Benzotriazole Phenoxide Hafnium Complexes as Efficient Catalysts for the Ring-Opening Polymerization of Lactide: Synthesis, Characterization, and Kinetics of Polymerization Catalysis. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201301422] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
37
|
Liu J, Ma H. Aluminum complexes with bidentate amido ligands: synthesis, structure and performance on ligand-initiated ring-opening polymerization of rac-lactide. Dalton Trans 2014; 43:9098-110. [DOI: 10.1039/c4dt00353e] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
38
|
Li Y, Zhao KQ, Elsegood MRJ, Prior TJ, Sun X, Mo S, Redshaw C. Organoaluminium complexes of ortho-, meta-, para-anisidines: synthesis, structural studies and ROP of ε-caprolactone (and rac-lactide). Catal Sci Technol 2014. [DOI: 10.1039/c4cy00624k] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
{[1,2-(OMe),NC6H4(μ-Me2Al)](μ-Me2Al)}2 (1), [1,3-(Me3AlOMe),NHC6H4(μ-Me2Al)]2 (2) and [1,4-(Me3AlOMe),NHC6H4(μ-Me2Al)]2 (3) are all highly active for the ROP of ε-caprolactone.
Collapse
Affiliation(s)
- Yuanzhuo Li
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu, China
| | - Ke-Qing Zhao
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu, China
| | | | | | - Xinsen Sun
- Department of Chemistry
- University of Hull
- Hull, UK
| | - Shanyan Mo
- Department of Chemistry
- University of Hull
- Hull, UK
| | - Carl Redshaw
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu, China
- Department of Chemistry
- University of Hull
| |
Collapse
|
39
|
Zhang W, Wang Y, Wang L, Redshaw C, Sun WH. Dialkylaluminium 2-imidazolylphenolates: Synthesis, characterization and ring-opening polymerization behavior towards lactides. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2013.11.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
40
|
Liu Y, Dong WS, Liu JY, Li YS. Living ring-opening homo- and copolymerisation of ε-caprolactone andl-lactide by cyclic β-ketiminato aluminium complexes. Dalton Trans 2014; 43:2244-51. [DOI: 10.1039/c3dt52712c] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|
41
|
Gao Y, Dai Z, Zhang J, Ma X, Tang N, Wu J. Trinuclear and Tetranuclear Magnesium Alkoxide Clusters as Highly Active Initiators for Ring-Opening Polymerization of l-Lactide. Inorg Chem 2013; 53:716-26. [DOI: 10.1021/ic401459a] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Yuan Gao
- Key Laboratory of Nonferrous
Metal Chemistry and Resources Utilization of Gansu Province, State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Zhongran Dai
- Key Laboratory of Nonferrous
Metal Chemistry and Resources Utilization of Gansu Province, State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Jinjin Zhang
- Key Laboratory of Nonferrous
Metal Chemistry and Resources Utilization of Gansu Province, State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Xinxian Ma
- Key Laboratory of Nonferrous
Metal Chemistry and Resources Utilization of Gansu Province, State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Ning Tang
- Key Laboratory of Nonferrous
Metal Chemistry and Resources Utilization of Gansu Province, State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Jincai Wu
- Key Laboratory of Nonferrous
Metal Chemistry and Resources Utilization of Gansu Province, State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| |
Collapse
|
42
|
Jianming R, Anguo X, Hongwei W, Hailin Y. Review – recent development of ring-opening polymerization of cyclic esters using aluminum complexes. Des Monomers Polym 2013. [DOI: 10.1080/15685551.2013.840509] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Affiliation(s)
- Ruan Jianming
- Powder Metallurgy Research Institute, Central South University, Changsha, Hunan, 410086, P.R. China
| | - Xiao Anguo
- Department of Chemistry and Chemical Engineering, Hunan University of Arts and Science, Changde, Hunan, 415000, P.R. China
| | - Wu Hongwei
- Powder Metallurgy Research Institute, Central South University, Changsha, Hunan, 410086, P.R. China
| | - Yang Hailin
- Powder Metallurgy Research Institute, Central South University, Changsha, Hunan, 410086, P.R. China
| |
Collapse
|
43
|
D'Auria I, Lamberti M, Mazzeo M, Milione S, Pellecchia C. Phosphido-diphosphine pincer aluminum complexes as catalysts for ring opening polymerization of cyclic esters. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26969] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ilaria D'Auria
- Department of Chemistry and Biology; University of Salerno. I-84084, Via Giovanni Paolo II; 132, Fisciano I-84084 Salerno Italy
| | - Marina Lamberti
- Department of Chemistry and Biology; University of Salerno. I-84084, Via Giovanni Paolo II; 132, Fisciano I-84084 Salerno Italy
| | - Mina Mazzeo
- Department of Chemistry and Biology; University of Salerno. I-84084, Via Giovanni Paolo II; 132, Fisciano I-84084 Salerno Italy
| | - Stefano Milione
- Department of Chemistry and Biology; University of Salerno. I-84084, Via Giovanni Paolo II; 132, Fisciano I-84084 Salerno Italy
| | - Claudio Pellecchia
- Department of Chemistry and Biology; University of Salerno. I-84084, Via Giovanni Paolo II; 132, Fisciano I-84084 Salerno Italy
| |
Collapse
|
44
|
Liu X, Jian C, Yu D, Zhang J, Tang N, Wang C, Wu J. Synthesis, characterization of aluminum complexes supported by multidentate aminophenol ligands and application in the ring-opening polymerization of ε-caprolactone. INORG CHEM COMMUN 2013. [DOI: 10.1016/j.inoche.2013.09.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
45
|
Han HL, Liu Y, Liu JY, Nomura K, Li YS. Synthesis of binuclear phenoxyimino organoaluminum complexes and their use as the catalyst precursors for efficient ring-opening polymerisation of ε-caprolactone. Dalton Trans 2013; 42:12346-53. [PMID: 23860908 DOI: 10.1039/c3dt50264c] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A series of novel binuclear phenoxyimino organoaluminum complexes of the type [(RN=CH)C6H3OAlMe2]2 [R = C6H5 (2a), 2,6-(i)Pr2C6H3 (2b), 2,6-Ph2C6H3 (2c), adamantyl (2d), (t)Bu (2e)] have been prepared in high yields, and these complexes were identified by (1)H, (13)C NMR and elemental analysis. Structural analysis for 2a-e revealed that these complexes have a distorted tetrahedral geometry around Al and both the Al-O and the Al-N bond distances were considerably influenced by substituents in the imino groups. The complexes were tested as catalyst precursors for ring-opening polymerisation (ROP) of ε-caprolactone (CL) in the presence of BnOH, and their catalytic activities were strongly affected by the catalyst structures and polymerisation conditions. An efficient living ROP has been achieved using the 2b/BnOH system.
Collapse
Affiliation(s)
- Hong-Ling Han
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | | | | | | | | |
Collapse
|
46
|
Dagorne S, Normand M, Kirillov E, Carpentier JF. Gallium and indium complexes for ring-opening polymerization of cyclic ethers, esters and carbonates. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2013.02.012] [Citation(s) in RCA: 155] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
47
|
Horeglad P, Litwińska A, Żukowska GZ, Kubicki D, Szczepaniak G, Dranka M, Zachara J. The influence of organosuperbases on the structure and activity of dialkylgallium alkoxides in the polymerization of rac
-lactide: the road to stereo diblock PLA copolymers. Appl Organomet Chem 2013. [DOI: 10.1002/aoc.2978] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Paweł Horeglad
- Faculty of Chemistry; University of Warsaw; 02-089 Warsaw Poland
| | - Anna Litwińska
- Faculty of Chemistry; University of Warsaw; 02-089 Warsaw Poland
| | | | - Dominik Kubicki
- Faculty of Chemistry; Warsaw University of Technology; 00-664 Warsaw Poland
| | | | - Maciej Dranka
- Faculty of Chemistry; Warsaw University of Technology; 00-664 Warsaw Poland
| | - Janusz Zachara
- Faculty of Chemistry; Warsaw University of Technology; 00-664 Warsaw Poland
| |
Collapse
|
48
|
Postigo L, Maestre MDC, Mosquera MEG, Cuenca T, Jiménez G. Aminoarenethiolate Aluminum Complexes: Synthesis, Characterization, and Use in l-Lactide Polymerization. Organometallics 2013. [DOI: 10.1021/om400111f] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Lorena Postigo
- Departamento
de
Quı́mica Inorgánica, Universidad de Alcalá, Campus Universitario,
E-28871 Alcalá de Henares (Madrid), Spain
| | - Marı́a del Carmen Maestre
- Departamento
de
Quı́mica Inorgánica, Universidad de Alcalá, Campus Universitario,
E-28871 Alcalá de Henares (Madrid), Spain
| | - Marta E. G. Mosquera
- Departamento
de
Quı́mica Inorgánica, Universidad de Alcalá, Campus Universitario,
E-28871 Alcalá de Henares (Madrid), Spain
| | - Tomás Cuenca
- Departamento
de
Quı́mica Inorgánica, Universidad de Alcalá, Campus Universitario,
E-28871 Alcalá de Henares (Madrid), Spain
| | - Gerardo Jiménez
- Departamento
de
Quı́mica Inorgánica, Universidad de Alcalá, Campus Universitario,
E-28871 Alcalá de Henares (Madrid), Spain
| |
Collapse
|
49
|
Fan L, Wang Y, Yao Y, Wu B, Shen Q. Synthesis, Structure, and Catalytic Behavior of Ytterbium Complexes Derived from a Linked Bis(β-ketoiminato) Ligand. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201200565] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
50
|
Yoon S, Kim SH, Heo J, Kim Y. Dimeric aluminum methyl complex bridged by 2-oxy-2-methyl-1-(phenylamino)propane: Synthesis, structure, and use in ring opening polymerization of lactide. INORG CHEM COMMUN 2013. [DOI: 10.1016/j.inoche.2012.12.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|