1
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Navarro M, González-Lizana D, Sánchez-Barba LF, Garcés A, Fernández I, Lara-Sánchez A, Rodríguez AM. Development of Heterobimetallic Al/Mg Complexes for the Very Rapid Ring-Opening Polymerization of Lactides. Inorg Chem 2023; 62:14833-14837. [PMID: 37676111 PMCID: PMC10521010 DOI: 10.1021/acs.inorgchem.3c02410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Indexed: 09/08/2023]
Abstract
The successful architecture of active catalytic species with enhanced efficiencies is critical for the optimal exploitation of sustainable resources in industrially demanded processes. In this work, we describe the preparation of novel helical heterobimetallic Al/Mg-based complexes of the type [AlMe2(pbpamd-)MgR{κ1-O-(OC4H8O)}] [R = Et (1a), tBu (2a)] as potential catalysts. The design was performed through the sequential addition of the Al fragment to the ligand, followed by the Mg platform, resulting in a planar π-C2N2(sp2)-Al/Mg bridging core between metals. The new heterobimetallic species have been unambiguously characterized by single-crystal X-ray analysis. NOESY, DOSY, and EXSY NMR studies as well as density functional theory calculations corroborate both a rearrangement in solution to scorpionate complexes containing an unprecedented apical carbanion with a direct σ-C(sp3)-Al covalent bond named [{Mg(R)(pbpamd-) Al(Me)2}] [R = Et (1b), tBu (2b)] and an interconversion equilibrium between both isomers. We verified their utility and high efficiency as catalysts in the well-controlled ring-opening polymerization of the biorenewable l- and rac-lactide (LA) at 23 °C, reaching a remarkable turnover frequency value close to 25000 h-1 for rac-LA at this temperature and exerting a significant level of heteroselectivity (Pr = 0.80). Very interestingly, the kinetics demonstrate apparent first-order with respect to the catalyst and LA, which supports a synergic intramolecular cooperation between centers with electronic modulation among them.
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Affiliation(s)
- Marta Navarro
- Departamento
de Biología y Geología, Física y Química
Inorgánica, Universidad Rey Juan
Carlos, 28933 Móstoles, Madrid, Spain
- Departamento
de Química Inorgánica, Orgánica y Bioquímica,
Centro de Innovación en Química Avanzada (ORFEO-CINQA),
Campus Universitario, Universidad de Castilla—La
Mancha, 13071 Ciudad Real, Spain
| | - David González-Lizana
- Departamento
de Biología y Geología, Física y Química
Inorgánica, Universidad Rey Juan
Carlos, 28933 Móstoles, Madrid, Spain
| | - Luis F. Sánchez-Barba
- Departamento
de Biología y Geología, Física y Química
Inorgánica, Universidad Rey Juan
Carlos, 28933 Móstoles, Madrid, Spain
| | - Andrés Garcés
- Departamento
de Biología y Geología, Física y Química
Inorgánica, Universidad Rey Juan
Carlos, 28933 Móstoles, Madrid, Spain
| | - Israel Fernández
- Departamento
de Química Orgánica I and Centro de Innovación
en Química Avanzada (ORFEO-CINQA), Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Agustín Lara-Sánchez
- Departamento
de Química Inorgánica, Orgánica y Bioquímica,
Centro de Innovación en Química Avanzada (ORFEO-CINQA),
Campus Universitario, Universidad de Castilla—La
Mancha, 13071 Ciudad Real, Spain
| | - Ana M. Rodríguez
- Departamento
de Química Inorgánica, Orgánica y Bioquímica,
Centro de Innovación en Química Avanzada (ORFEO-CINQA),
Campus Universitario, Universidad de Castilla—La
Mancha, 13071 Ciudad Real, Spain
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2
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Fuchs M, Walbeck M, Jagla E, Hoffmann A, Herres-Pawlis S. Guanidine Carboxy Zinc Complexes for the Chemical Recycling of Renewable Polyesters. Chempluschem 2022; 87:e202200029. [DOI: 10.1002/cplu.202200029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 02/22/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Martin Fuchs
- RWTH Aachen University: Rheinisch-Westfalische Technische Hochschule Aachen Chemistry GERMANY
| | - Marcel Walbeck
- RWTH Aachen University: Rheinisch-Westfalische Technische Hochschule Aachen Chemistry GERMANY
| | - Eveline Jagla
- RWTH Aachen University: Rheinisch-Westfalische Technische Hochschule Aachen Chemistry GERMANY
| | - Alexander Hoffmann
- RWTH Aachen University: Rheinisch-Westfalische Technische Hochschule Aachen Chemistry GERMANY
| | - Sonja Herres-Pawlis
- RWTH Aachen Fakultät 1, Institut für Anorganische Chemie Landoltweg 1 52074 Aachen GERMANY
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3
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Diaz C, Fu J, Soobrattee S, Cao L, Nyamayaro K, Goonesinghe C, Patrick BO, Mehrkhodavandi P. Comparison of Imine- and Phosphinimine-Supported Indium Complexes: Tuning the Reactivity for the Sequential and Simultaneous Copolymerization of Lactide and ε-Caprolactone. Inorg Chem 2022; 61:3763-3773. [PMID: 35171588 DOI: 10.1021/acs.inorgchem.2c00043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Imine- and phosphinimine-supported indium complexes were used as catalysts in the polymerization of racemic lactide and ε-caprolactone as well as their copolymerization by the sequential and simultaneous addition of monomers. Tuning the electronics and sterics of the indium centers by either (i) changing the nature of the nitrogen donors and (ii) coordinating a hemilabile side group had a significant effect on the reactivity of the complexes, their stability, and their control in the synthesis of block copolymers. Specifically, the imine-supported complex (5) showed the highest activity in the homo- and copolymerization of the cyclic esters, in contrast to the phosphinimine-supported complex (7), which was significantly slower and less stable. The presence of morpholine and thiomorpholine hemilabile side groups either reduced the activity or prevented the formation of alkoxide complexes.
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Affiliation(s)
- Carlos Diaz
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Jane Fu
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Shazia Soobrattee
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Lirong Cao
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Kudzanai Nyamayaro
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Chatura Goonesinghe
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Brian O Patrick
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Parisa Mehrkhodavandi
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
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4
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Jiang Y, Zhang W, Han M, Wang X, Solan GA, Wang R, Ma Y, Sun WH. Phenoxy-imine/-amide aluminum complexes with pendant or coordinated pyridine moieties: Solvent effects on structural type and catalytic capability for the ROP of cyclic esters. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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5
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Baker CA, Romain C, Long NJ. Cation-π interactions enabling hard/soft Ti/Ag heterobimetallic cooperativity in lactide ring-opening polymerisation. Chem Commun (Camb) 2021; 57:12524-12527. [PMID: 34751687 DOI: 10.1039/d1cc05083d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The combination of a Ti-salen complex with AgBArF reveals unique hard/soft heterobimetallic cooperativity in lactide ring-opening polymerisation (ROP), enabling significant activity at room temperature. Reactivity, mechanistic and computational studies highlight the role of cation-π interactions in the formation of heterobimetallic species and provide key insights into the role of both metals in ROP.
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Affiliation(s)
- Chloe A Baker
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London, W12 0BZ, UK.
| | - Charles Romain
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London, W12 0BZ, UK.
| | - Nicholas J Long
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City Campus, Wood Lane, London, W12 0BZ, UK.
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6
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Gruszka W, Garden JA. Advances in heterometallic ring-opening (co)polymerisation catalysis. Nat Commun 2021; 12:3252. [PMID: 34059676 PMCID: PMC8167082 DOI: 10.1038/s41467-021-23192-y] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 04/12/2021] [Indexed: 11/09/2022] Open
Abstract
Truly sustainable plastics require renewable feedstocks coupled with efficient production and end-of-life degradation/recycling processes. Some of the most useful degradable materials are aliphatic polyesters, polycarbonates and polyamides, which are often prepared via ring-opening (co)polymerisation (RO(CO)P) using an organometallic catalyst. While there has been extensive research into ligand development, heterometallic cooperativity offers an equally promising yet underexplored strategy to improve catalyst performance, as heterometallic catalysts often exhibit significant activity and selectivity enhancements compared to their homometallic counterparts. This review describes advances in heterometallic RO(CO)P catalyst design, highlighting the overarching structure-activity trends and reactivity patterns to inform future catalyst design.
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Affiliation(s)
- Weronika Gruszka
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK
| | - Jennifer A Garden
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK.
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7
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Phosphasalalen Rare-Earth Complexes for the Polymerization of rac-Lactide and rac-β-Butyrolactone. Inorg Chem 2021; 60:705-717. [PMID: 33405906 DOI: 10.1021/acs.inorgchem.0c02741] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of new phosphasalalen pro-ligands, analogues of salalen but with an iminophosphorane replacing the imine functionality, and their corresponding rare-earth alkoxide and siloxide complexes were synthesized. The multinuclear NMR spectra and X-ray diffraction analyses revealed that, for the tert-butoxide and ethoxide complexes, the resulting phosphasalalen rare-earth product was composed of a mononuclear alkoxide and a binuclear complex containing bridged alkoxo and hydroxo groups, while an analogous binuclear complex was isolated as the sole product for the siloxide complex. All the complexes could catalyze the heteroselective ring-opening polymerization (ROP) of rac-lactide (Pr up to 0.77) with high catalytic activities and a controlled polydispersity. Remarkably, the yttrium and lutetium phosphasalalen complexes could also efficiently catalyze the ROP of rac-β-butyrolactone to produce syndiotactic polymers (Pr up to 0.73) while their salalen analogues were inert, revealing the special effects of the iminophosphorane moiety. Detailed end-group analyses and kinetic investigations suggested that the alkoxo-hydroxo-bridged complexes maintained their binuclear structures in the polymerization.
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8
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Liu N, Liu D, Liu B, Zhang H, Cui D. Stereoselective polymerization of rac-lactide catalyzed by zwitterionic calcium complexes. Polym Chem 2021. [DOI: 10.1039/d0py01397h] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Two zwitterionic calcium complexes L1CaN(SiMe3)2(THF) (1) and L2CaN(SiMe3)2 (2) via protolysis reaction were synthesized. At −75 °C, 1 gave a heterotactic sequence enriched polylactide, whilst 2 produced an isotactic sequence enriched polymer.
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Affiliation(s)
- Na Liu
- Key Laboratory of Rare and Scattered Elements
- Liaoning University
- Shenyang
- China
| | - Doudou Liu
- College of Chemistry & Chemical Engineering
- Inner Mongolia University
- Hohhot
- China
| | - Bo Liu
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Science
- Changchun
- China
| | - Hao Zhang
- College of Chemistry & Chemical Engineering
- Inner Mongolia University
- Hohhot
- China
| | - Dongmei Cui
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Science
- Changchun
- China
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9
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Liu S, Chen X. The homoleptic bis(β-quinolylenolate) zinc catalysts for the ring-opening polymerization of ε-caprolactone: Kinetics and mechanism. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121596] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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10
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Potassium N-arylbenzimidates as readily accessible and benign (pre)catalysts for the ring opening polymerization of ε-CL and L-LA. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.111280] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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11
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Anwar H, Haque RA, Saleem RSZ, Iqbal MA. Recent advances in synthesis of organometallic complexes of indium. REV INORG CHEM 2020. [DOI: 10.1515/revic-2020-0005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
AbstractThe indium complexes are being used in many applications like catalysis, optoelectronics, sensors, solar cells, biochemistry, medicine, infrared (IR) mirrors and thin-film transistors (TFTs). In organometallic complexes of indium, it forms different types of complexes with single, double, triple and tetra linkages by coordinating with numerous elements like C, N, O and S and also with some other elements like Se and Ru. So, the present study comprises all the possible ways to synthesize the indium complexes by reacting with different organic ligands; most of them are N-heterocyclic carbenes, amines, amides and phenols. The commonly used solvents for these syntheses are tetrahydrofuran, dichloromethane, toluene, benzene, dimethyl sulfoxide (DMSO) and water. According to the nature of the ligands, indium complexes were reported at different temperatures and stirring time. Because of their unique characteristics, the organometallic chemistry of group 13 metal indium complexes remains a subject of continuing interest in synthetic chemistry as well as material science.
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Affiliation(s)
- Hira Anwar
- Department of Chemistry, University of Agriculture, Faisalabad-38040, Pakistan
- Organometallic and Coordination Chemistry Laboratory, University of Agriculture, Faisalabad-38040, Pakistan
| | - Rosenani A. Haque
- School of Chemical Sciences, Universiti Sains Malaysia, 11800-USM, Penang, Malaysia
| | - Rahman Shah Zaib Saleem
- Department of Chemistry and Chemical Engineering, Syed Babar Ali School of Science and Engineering, Lahore University of Management Sciences, Lahore 54792, Pakistan
| | - Muhammad Adnan Iqbal
- Department of Chemistry, University of Agriculture, Faisalabad-38040, Pakistan
- Organometallic and Coordination Chemistry Laboratory, University of Agriculture, Faisalabad-38040, Pakistan,
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12
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Andrea KA, Beckett AR, Briand GG, Martell SA, Masuda J, Morrison KM, Yammine EM. Synthesis and structural characterization of methylindium imino/aminophenolates: Comparison to aluminum analogues and reactivity toward the coupling reactions of carbon dioxide with epoxides. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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Qin L, Cheng F, Eisen MS, Chen X. Unexpected substituent’s effects on catalytic activity in the ring-opening polymerization of ε-CL and δ-VL catalyzed by β-pyridyl-enamino Al complexes. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109626] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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14
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Hador R, Lipstman S, Rescigno R, Venditto V, Kol M. Aluminium complexes of salanol ligands: coordination chemistry and stereoselective lactide polymerization. Chem Commun (Camb) 2020; 56:13528-13531. [DOI: 10.1039/d0cc05957a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aluminium complexes of the new salanol ligands give rise to all PLA tacticities by different stereocontrol mechanisms.
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Affiliation(s)
- Rami Hador
- The School of Chemistry
- Tel Aviv University
- Ramat Aviv
- Israel
| | | | - Raffaella Rescigno
- Department of Chemistry and Biology A. Zambelli
- and INSTM Research Unit
- University of Salerno
- 84084 Fisciano
- Italy
| | - Vincenzo Venditto
- Department of Chemistry and Biology A. Zambelli
- and INSTM Research Unit
- University of Salerno
- 84084 Fisciano
- Italy
| | - Moshe Kol
- The School of Chemistry
- Tel Aviv University
- Ramat Aviv
- Israel
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15
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Ghosh S, Wölper C, Tjaberings A, Gröschel AH, Schulz S. Syntheses, structures and catalytic activity of tetranuclear Mg complexes in the ROP of cyclic esters under industrially relevant conditions. Dalton Trans 2020; 49:375-387. [PMID: 31829382 DOI: 10.1039/c9dt04359d] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Tetranuclear magnesium imino(phenolate) complexes Mg4(L1–4)4 are excellent catalysts for the ROP of bulk rac-lactide and ε-caprolactone under industrially relevant conditions.
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Affiliation(s)
- Swarup Ghosh
- Faculty of Chemistry
- University of Duisburg-Essen and Center for Nanointegration Duisburg-Essen (CENIDE)
- D-45141 Essen
- Germany
| | - Christoph Wölper
- Faculty of Chemistry
- University of Duisburg-Essen and Center for Nanointegration Duisburg-Essen (CENIDE)
- D-45141 Essen
- Germany
| | - Alexander Tjaberings
- Faculty of Chemistry
- University of Duisburg-Essen and Center for Nanointegration Duisburg-Essen (CENIDE)
- NanoEnergieTechnikZentrum
- 47057 Duisburg
- Germany
| | - André H. Gröschel
- Faculty of Chemistry
- University of Duisburg-Essen and Center for Nanointegration Duisburg-Essen (CENIDE)
- NanoEnergieTechnikZentrum
- 47057 Duisburg
- Germany
| | - Stephan Schulz
- Faculty of Chemistry
- University of Duisburg-Essen and Center for Nanointegration Duisburg-Essen (CENIDE)
- D-45141 Essen
- Germany
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16
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Diteepeng N, Buffet JC, Turner ZR, O'Hare D. Constrained geometry scandium permethylindenyl complexes for the ring-opening polymerisation of l- and rac-lactide. Dalton Trans 2019; 48:16099-16107. [PMID: 31617518 DOI: 10.1039/c9dt03450a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and characterisation of constrained geometry scandium permethylindenyl chloride, aryloxide and borohydride complexes Me2SB(tBuN,I*)Sc(Cl)(THF) (1), Me2SB(tBuN,I*)Sc(O-2,6-iPr-C6H3)(THF) (2), Me2SB(tBuN,I*)Sc(O-2,4-tBu-C6H3)(THF) (3) and Me2SB(tBuN,I*)Sc(BH4)(THF) (4) are reported. The activity of complexes 1-4 as initiators for the ring-opening polymerisation (ROP) of l- and rac-lactide is presented. The ROP of l- and rac-lactide using complexes 2 and 3 show first-order dependence on monomer concentration, and produced isotactic polylactide (PLA) and moderately heterotactic PLA (Pr = 0.68-0.72), respectively. Good agreement between experimental and theoretical molecular weights of PLA (Mn) and relatively narrow dispersities (Mw/Mn < 1.20) were obtained. Complex 4 showed higher activity for ROP of l- and rac-lactide than 2 or 3, with second-order dependence on monomer concentrations. However, poorly controlled molecular weights and lower heteroselectivity (Pr = 0.61-0.67) were observed. The effect of temperature and catalyst concentration for the ROP of l-lactide using 2 and 3 was also studied.
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Affiliation(s)
- Nichabhat Diteepeng
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, OX1 3TA Oxford, UK.
| | - Jean-Charles Buffet
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, OX1 3TA Oxford, UK.
| | - Zoë R Turner
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, OX1 3TA Oxford, UK.
| | - Dermot O'Hare
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, OX1 3TA Oxford, UK.
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17
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Hador R, Botta A, Venditto V, Lipstman S, Goldberg I, Kol M. The Dual‐Stereocontrol Mechanism: Heteroselective Polymerization of
rac
‐Lactide and Syndioselective Polymerization of
meso
‐Lactide by Chiral Aluminum Salan Catalysts. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906848] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Rami Hador
- School of Chemistry Tel Aviv University Ramat Aviv Tel Aviv 6997801 Israel
| | - Antonio Botta
- Department of Chemistry and Biology A. Zambelli, and INSTM Research Unit University of Salerno Fisciano 84084 Salerno Italy
| | - Vincenzo Venditto
- Department of Chemistry and Biology A. Zambelli, and INSTM Research Unit University of Salerno Fisciano 84084 Salerno Italy
| | - Sophia Lipstman
- School of Chemistry Tel Aviv University Ramat Aviv Tel Aviv 6997801 Israel
| | - Israel Goldberg
- School of Chemistry Tel Aviv University Ramat Aviv Tel Aviv 6997801 Israel
| | - Moshe Kol
- School of Chemistry Tel Aviv University Ramat Aviv Tel Aviv 6997801 Israel
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18
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Hador R, Botta A, Venditto V, Lipstman S, Goldberg I, Kol M. The Dual‐Stereocontrol Mechanism: Heteroselective Polymerization of
rac
‐Lactide and Syndioselective Polymerization of
meso
‐Lactide by Chiral Aluminum Salan Catalysts. Angew Chem Int Ed Engl 2019; 58:14679-14685. [DOI: 10.1002/anie.201906848] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Indexed: 11/12/2022]
Affiliation(s)
- Rami Hador
- School of Chemistry Tel Aviv University Ramat Aviv Tel Aviv 6997801 Israel
| | - Antonio Botta
- Department of Chemistry and Biology A. Zambelli, and INSTM Research Unit University of Salerno Fisciano 84084 Salerno Italy
| | - Vincenzo Venditto
- Department of Chemistry and Biology A. Zambelli, and INSTM Research Unit University of Salerno Fisciano 84084 Salerno Italy
| | - Sophia Lipstman
- School of Chemistry Tel Aviv University Ramat Aviv Tel Aviv 6997801 Israel
| | - Israel Goldberg
- School of Chemistry Tel Aviv University Ramat Aviv Tel Aviv 6997801 Israel
| | - Moshe Kol
- School of Chemistry Tel Aviv University Ramat Aviv Tel Aviv 6997801 Israel
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19
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Zhu D, Guo L, Zhang W, Hu X, Nomura K, Vignesh A, Hao X, Zhang Q, Sun WH. Dialkylaluminum 2-substituted 6,6-dimethylcyclopentylpyridin-7-oxylates toward structural-differentiation of the ring-opening polymerization of ε-caprolactone and l-lactides. Dalton Trans 2019; 48:4157-4167. [PMID: 30810136 DOI: 10.1039/c9dt00137a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, a series of dialkylaluminum 2-substituted 6,6-dimethylcyclopentyl pyridin-7-oxylates Al1-Al7 were synthesized and characterized by 1H- and 13C-NMR spectroscopy and elemental analysis. The molecular structure of Al3 was proven to be a dimer of an aluminum complex. These aluminum complexes could efficiently initiate the ring-opening polymerization (ROP) of ε-caprolactone (CL), and the structural differentiations of the resultant PCL were strongly dependent on the amount of BnOH (PhCH2OH) used. In the absence of BnOH, the resultant PCL showed a cyclic structure, whereas BnO-capped linear PCL was obtained in the presence of >2.0 equivalents of BnOH; the resultant PCL was a mixture of linear and cyclic PCLs in the presence of 1.0 equivalent of BnOH. Moreover, these aluminum complexes exhibited high efficiency towards the ROP of l-lactide (LLA); however, the activities were lower than those for the ROP of ε-CL. Without BnOH, the resultant PLLA showed a highly linear structure with the alkyl-end group from aluminum complexes; on the other hand, PLLA displayed a major cyclic structure and minor BnO-capped linear PLLA if 1.0 equivalent of BnOH was employed, and the percentage of BnO-capped linear PLLA was increased by increasing the amount of BnOH.
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Affiliation(s)
- Dongzhi Zhu
- 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.
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20
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Kremer AB, Mehrkhodavandi P. Dinuclear catalysts for the ring opening polymerization of lactide. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2018.09.008] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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21
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Cai Z, Xiao D, Do LH. Cooperative Heterobimetallic Catalysts in Coordination Insertion Polymerization. COMMENT INORG CHEM 2019. [DOI: 10.1080/02603594.2019.1570165] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Zhongzheng Cai
- Department of Chemistry, University of Houston, Houston, Texas, USA
| | - Dawei Xiao
- Department of Chemistry, University of Houston, Houston, Texas, USA
| | - Loi H. Do
- Department of Chemistry, University of Houston, Houston, Texas, USA
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22
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Deacy AC, Durr CB, Garden JA, White AJP, Williams CK. Groups 1, 2 and Zn(II) Heterodinuclear Catalysts for Epoxide/CO2 Ring-Opening Copolymerization. Inorg Chem 2018; 57:15575-15583. [DOI: 10.1021/acs.inorgchem.8b02923] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Arron C. Deacy
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Christopher B. Durr
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Jennifer A. Garden
- Department of Chemistry, Imperial College London, London SW7 2AZ, United Kingdom
| | - Andrew J. P. White
- Department of Chemistry, Imperial College London, London SW7 2AZ, United Kingdom
| | - Charlotte K. Williams
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
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23
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Jung HJ, Chang C, Yu I, Aluthge DC, Ebrahimi T, Mehrkhodavandi P. Coupling of Epoxides and Lactones by Cationic Indium Catalysts To Form Functionalized Spiro-Orthoesters. ChemCatChem 2018. [DOI: 10.1002/cctc.201800474] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Hyuk-Joon Jung
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Chen Chang
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Insun Yu
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Dinesh C. Aluthge
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Tannaz Ebrahimi
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Parisa Mehrkhodavandi
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
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24
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Shin S, Cho H, Lee H, Nayab S, Kim Y. Zinc(II) complexes containing N′-aromatic group substituted N,N′,N-bis((1H-pyrazol-1-yl)methyl)amines: Synthesis, characterization, and polymerizations of methyl methacrylate and rac-lactide. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1437266] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Sujin Shin
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu, Republic of Korea
| | - Hyungwoo Cho
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu, Republic of Korea
| | - Hyosun Lee
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu, Republic of Korea
| | - Saira Nayab
- Department of Chemistry, Shaheed Benazir Bhutto University, Sheringal Dir (U), Islamic Republic of Pakistan
| | - Younghak Kim
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, Republic of Korea
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25
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Han Y, Gao A, Zhang Y, Yao W, Guan H. Zinc complexes supported by N,O-bidentate amino-alkoxyl ligands: Synthesis, characterization and catalytic property for the ring-opening polymerization of l-lactide. Polyhedron 2018. [DOI: 10.1016/j.poly.2017.10.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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26
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Osten KM, Mehrkhodavandi P. Indium Catalysts for Ring Opening Polymerization: Exploring the Importance of Catalyst Aggregation. Acc Chem Res 2017; 50:2861-2869. [PMID: 29087695 DOI: 10.1021/acs.accounts.7b00447] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Inexorably, the environmental persistence and damage caused by polyolefins have become major drawbacks to their continued long-term use. Global shifts in thinking from fossil-fuel to renewable biobased resources have urged researchers to focus their attention on substituting fossil-fuel based polymers with renewable and biodegradable alternatives on an industrial scale. The recent development of biodegradable polyesters from ring opening polymerization (ROP) of bioderived cyclic ester monomers has emerged as a promising new avenue toward this goal. Ever increasing numbers of metal-based initiators have been reported in the literature for the controlled ROP of cyclic esters, in particular for the polymerization of lactide to produce poly(lactic acid) (PLA). PLA has several material weaknesses, which hinder its use as a replacement for commodity plastics. Despite many advances in developing highly active and controlled catalysts for lactide polymerization, no single catalyst system has emerged to replace industrially used catalysts and provide access to PLA materials with improved properties. We reported the first example of indium(III) for the ring opening polymerization of lactide. Since then, indium(III) has emerged as a useful Lewis acid in initiators for the controlled polymerization of lactide and other cyclic esters. In particular, we have developed a large family of chiral dinuclear indium complexes bearing tridentate diaminophenolate ligands and tetradentate salen and salan ligands. Complexes within our tridentate ligand family are highly active initiators for the moderately isoselective living and immortal polymerization of rac-lactide, as well as other cyclic esters. We have shown that subtle steric effects influence aggregation in these systems, with polymerization typically proceeding through a dinuclear propagating species. In addition, profound effects on polymerization activities have been observed for central tertiary versus secondary amine donors in these and other related systems. In contrast, our well-controlled and highly active chiral indium salen systems are more isoselective than the tridentate analogues and polymerize lactide via a mononuclear propagating species. Again, we have noticed that subtle steric and electronic changes to the ligand can influence both polymerization activity and stereoselectivity via aggregation phenomena. Recently, we have reported a promising new chiral indium catalyst supported by a tetradentate salan ligand. This catalyst is remarkably water and air stable and can be activated by linear and branched alcohols to provide controlled access to multiblock copolymers in air. This catalyst represents an important step forward toward generating new, commercially relevant catalysts for ROP of cyclic esters to produce novel biodegradable polymers, and highlights the unique value of indium-based catalysts in the field.
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Affiliation(s)
- Kimberly M. Osten
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T1Z1, Canada
| | - Parisa Mehrkhodavandi
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T1Z1, Canada
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27
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Aminophenolates of aluminium, gallium and zinc: Synthesis, characterization and polymerization activity. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3748] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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28
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Kan C, Hu J, Huang Y, Wang H, Ma H. Highly Isoselective and Active Zinc Catalysts for rac-Lactide Polymerization: Effect of Pendant Groups of Aminophenolate Ligands. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01420] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Chao Kan
- Shanghai Key Laboratory of
Functional Materials Chemistry and Laboratory of Organometallic Chemistry,
School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Jianwen Hu
- Shanghai Key Laboratory of
Functional Materials Chemistry and Laboratory of Organometallic Chemistry,
School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Yang Huang
- Shanghai Key Laboratory of
Functional Materials Chemistry and Laboratory of Organometallic Chemistry,
School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Haobing Wang
- Shanghai Key Laboratory of
Functional Materials Chemistry and Laboratory of Organometallic Chemistry,
School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Haiyan Ma
- Shanghai Key Laboratory of
Functional Materials Chemistry and Laboratory of Organometallic Chemistry,
School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
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29
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Xia Q, Cui Y, Yuan D, Wang Y, Yao Y. Synthesis and characterization of lanthanide complexes stabilized by N -aryl substituted β -ketoiminato ligands and their application in the polymerization of rac -lactide. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.06.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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30
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Group 4 Metal Complexes of Phenylene-Salalen Ligands in rac
-Lactide Polymerization Giving High Molecular Weight Stereoblock Poly(lactic acid). Chemistry 2017; 23:11540-11548. [DOI: 10.1002/chem.201701007] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2017] [Indexed: 01/19/2023]
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31
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Nifant'ev IE, Shlyakhtin AV, Tavtorkin AN, Ivchenko PV, Borisov RS, Churakov AV. Monomeric and dimeric magnesium mono-BHT complexes as effective ROP catalysts. CATAL COMMUN 2016. [DOI: 10.1016/j.catcom.2016.09.018] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
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32
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Kirk SM, Kociok-Köhn G, Jones MD. Zirconium vs Aluminum Salalen Initiators for the Production of Biopolymers. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00718] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sarah M. Kirk
- Doctoral Training
Centre in Sustainable Chemical Technologies and ‡Department of
Chemistry, University of Bath, Bath BA2 7AY, U.K
| | - Gabriele Kociok-Köhn
- Doctoral Training
Centre in Sustainable Chemical Technologies and ‡Department of
Chemistry, University of Bath, Bath BA2 7AY, U.K
| | - Matthew D. Jones
- Doctoral Training
Centre in Sustainable Chemical Technologies and ‡Department of
Chemistry, University of Bath, Bath BA2 7AY, U.K
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33
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Cybularczyk M, Dranka M, Zachara J, Horeglad P. Effect of In–CNHC Bonds on the Synthesis, Structure, and Reactivity of Dialkylindium Alkoxides: How Indium Compares to Gallium. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00510] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Martyna Cybularczyk
- Centre
of New Technologies, University of Warsaw, Banacha 2c, 02-097 Warsaw, Poland
- Faculty
of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Maciej Dranka
- Faculty
of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | - Janusz Zachara
- Faculty
of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | - Paweł Horeglad
- Centre
of New Technologies, University of Warsaw, Banacha 2c, 02-097 Warsaw, Poland
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34
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Lanthanide alkoxide complexes stabilized by a novel salen-type Schiff-base ligand: Synthesis, structure, and catalysis for the polymerization of lactide. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.06.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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35
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Wang H, Yang Y, Ma H. Exploring Steric Effects in Diastereoselective Synthesis of Chiral Aminophenolate Zinc Complexes and Stereoselective Ring-Opening Polymerization of rac-Lactide. Inorg Chem 2016; 55:7356-72. [DOI: 10.1021/acs.inorgchem.6b00378] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Haobing Wang
- Shanghai Key Laboratory of Functional Materials Chemistry
and Laboratory of Organometallic Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Yang Yang
- Shanghai Key Laboratory of Functional Materials Chemistry
and Laboratory of Organometallic Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Haiyan Ma
- Shanghai Key Laboratory of Functional Materials Chemistry
and Laboratory of Organometallic Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
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36
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Rosen T, Popowski Y, Goldberg I, Kol M. Zinc Complexes of Sequential Tetradentate Monoanionic Ligands in the Isoselective Polymerization of rac
-Lactide. Chemistry 2016; 22:11533-6. [DOI: 10.1002/chem.201601979] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Tomer Rosen
- School of Chemistry; Tel Aviv University; Ramat Aviv Tel Aviv 69978 Israel
| | - Yanay Popowski
- School of Chemistry; Tel Aviv University; Ramat Aviv Tel Aviv 69978 Israel
| | - Israel Goldberg
- School of Chemistry; Tel Aviv University; Ramat Aviv Tel Aviv 69978 Israel
| | - Moshe Kol
- School of Chemistry; Tel Aviv University; Ramat Aviv Tel Aviv 69978 Israel
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37
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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.
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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.
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38
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Li W, Ouyang H, Chen L, Yuan D, Zhang Y, Yao Y. A Comparative Study on Dinuclear and Mononuclear Aluminum Methyl Complexes Bearing Piperidyl–Phenolato Ligands in ROP of Epoxides. Inorg Chem 2016; 55:6520-4. [PMID: 27322514 DOI: 10.1021/acs.inorgchem.6b00639] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wenyi Li
- Key Laboratory of Organic Synthesis of Jiangsu Province and Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, College of Chemistry, Chemical Engineering & Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People’s Republic of China
- Department
of Chemistry and Biological Engineering, Hunan University of Science and Engineering, Yongzhou 425199, Hunan, People’s Republic of China
| | - Hao Ouyang
- Key Laboratory of Organic Synthesis of Jiangsu Province and Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, College of Chemistry, Chemical Engineering & Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People’s Republic of China
| | - Lijuan Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province and Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, College of Chemistry, Chemical Engineering & Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People’s Republic of China
| | - Dan Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province and Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, College of Chemistry, Chemical Engineering & Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People’s Republic of China
| | - Yong Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province and Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, College of Chemistry, Chemical Engineering & Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People’s Republic of China
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province and Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, College of Chemistry, Chemical Engineering & Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People’s Republic of China
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39
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Fliedel C, Rosa V, Alves FM, Martins AM, Avilés T, Dagorne S. P,O-Phosphinophenolate zinc(II) species: synthesis, structure and use in the ring-opening polymerization (ROP) of lactide, ε-caprolactone and trimethylene carbonate. Dalton Trans 2016; 44:12376-87. [PMID: 25847079 DOI: 10.1039/c5dt00458f] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The P,O-type phosphinophenol proligands (1·H, 2-PPh2-4-Me-6-Me-C6H2OH; 2·H, 2-PPh2-4-Me-6-(t)Bu-C6H2OH) readily react with one equiv. of ZnEt2 to afford in high yields the corresponding Zn(II)-ethyl dimers of the type [(κ(2)-P,O)Zn-Et]2 (3 and 4) with two μ-OPh bridging oxygens connecting the two Zn(II) centers, as determined by X-ray diffraction (XRD) studies in the case of 3. Based on diffusion-ordered NMR spectroscopy (DOSY), both species 3 and 4 retain their dimeric structures in solution. The alcoholysis reaction of Zn(II) alkyls 3 and 4 with BnOH led to the high yield formation of the corresponding Zn(II) benzyloxide species [(κ(2)-P,O)Zn-OBn]2 (5 and 6), isolated in a pure form as colorless solids. The centrosymmetric and dimeric nature of Zn(II) alkoxides 5 and 6 in solution was deduced from DOSY NMR experiments and multinuclear NMR data. Though the heteroleptic species 5 is stable in solution, its analogue 6 is instable in CH2Cl2 solution at room temperature to slowly decompose to the corresponding homoleptic species 8via the transient formation of (κ(2)-P,O)2Zn2(μ-OBn)(μ–κ(1):κ(1)-P,O) (6′). Crystallization of compound 6 led to crystals of 6′, as established by XRD analysis. The reaction of ZnEt2 with two equiv. of 1·H and 2·H allowed access to the corresponding homoleptic species of the type [Zn(P,O)2] (7 and 8). All gathered data are consistent with compound 7 being a dinuclear species in the solid state and in solution. Data for species 8, which bears a sterically demanding P,O-ligand, are consistent with a mononuclear species in solution. The Zn(II) alkoxide species 5 and the [Zn(P,O)2]-type compounds 7 and 8 were evaluated as initiators of the ring-opening polymerization (ROP) of lactide (LA), ε-caprolactone (ε-CL) and trimethylene carbonate (TMC). Species 5 is a well-behaved ROP initiator for the homo-, co- and ter-polymerization of all three monomers with the production of narrow disperse materials under living and immortal conditions. Though species 7 and 8 are ROP inactive on their own, they readily polymerize LA in the presence of a nucleophile such as BnOH to produce narrow disperse PLA, presumably via an activated-monomer ROP mechanism.
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Affiliation(s)
- Christophe Fliedel
- LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa, Caparica, 2829-516, Portugal
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40
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Moskalev MV, Lukoyanov AN, Baranov EV, Fedushkin IL. Unexpected reactivity of an alkylaluminum complex of a non-innocent 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene ligand (dpp-bian). Dalton Trans 2016; 45:15872-15878. [DOI: 10.1039/c6dt01750a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The non-innocence of the bis-amido dpp-bian ligand has been documented by the reactions of compound 1 with acidic substrates, e.g. water.
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Affiliation(s)
- M. V. Moskalev
- G.A. Razuvaev Institute of Organometallic Chemistry
- Russian Academy of Sciences
- 603137 Nizhny Novgorod
- Russian Federation
| | - A. N. Lukoyanov
- G.A. Razuvaev Institute of Organometallic Chemistry
- Russian Academy of Sciences
- 603137 Nizhny Novgorod
- Russian Federation
| | - E. V. Baranov
- G.A. Razuvaev Institute of Organometallic Chemistry
- Russian Academy of Sciences
- 603137 Nizhny Novgorod
- Russian Federation
| | - I. L. Fedushkin
- G.A. Razuvaev Institute of Organometallic Chemistry
- Russian Academy of Sciences
- 603137 Nizhny Novgorod
- Russian Federation
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41
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Zhang Q, Zhang W, Wang S, Solan GA, Liang T, Rajendran NM, Sun WH. Sodium iminoquinolates with cubic and hexagonal prismatic motifs: synthesis, characterization and their catalytic behavior toward the ROP of rac-lactide. Inorg Chem Front 2016. [DOI: 10.1039/c6qi00155f] [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
Sodium 2-arylimino-8-quinolates have been shown to adopt a variety of unusual multimetallic assemblies; all exhibit good activities towards the ROP of rac-lactide.
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Affiliation(s)
- Qiurui Zhang
- Key Laboratory of Engineering Plastics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Wenjuan Zhang
- Key Laboratory of Engineering Plastics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Shengdong Wang
- Key Laboratory of Engineering Plastics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Gregory A. Solan
- Key Laboratory of Engineering Plastics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Tongling Liang
- Key Laboratory of Engineering Plastics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | | | - Wen-Hua Sun
- Key Laboratory of Engineering Plastics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
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42
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Wang H, Guo J, Yang Y, Ma H. Diastereoselective synthesis of chiral aminophenolate magnesium complexes and their application in the stereoselective polymerization of rac-lactide and rac-β-butyrolactone. Dalton Trans 2016; 45:10942-53. [DOI: 10.1039/c6dt01126h] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A series of magnesium silylamido complexes supported by chiral aminophenolate ligands were synthesized, and their catalytic behaviors toward the ring-opening polymerization of rac-lactide (LA) and rac-β-butyrolactone (BBL) were explored.
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Affiliation(s)
- Haobing Wang
- Shanghai Key Laboratory of Functional Materials Chemistry and Laboratory of Organometallic Chemistry
- East China University of Science and Technology
- Shanghai 200237
- People's Republic of China
| | - Jianshuang Guo
- Shanghai Key Laboratory of Functional Materials Chemistry and Laboratory of Organometallic Chemistry
- East China University of Science and Technology
- Shanghai 200237
- People's Republic of China
| | - Yang Yang
- Shanghai Key Laboratory of Functional Materials Chemistry and Laboratory of Organometallic Chemistry
- East China University of Science and Technology
- Shanghai 200237
- People's Republic of China
| | - Haiyan Ma
- Shanghai Key Laboratory of Functional Materials Chemistry and Laboratory of Organometallic Chemistry
- East China University of Science and Technology
- Shanghai 200237
- People's Republic of China
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43
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Theoretical and experimental studies of 1,5,7-triazabicyclo[4.4.0]dec-5-ene-catalyzed ring opening/ring closure reaction mechanism for 5-, 6- and 7-membered cyclic esters and carbonates. REACTION KINETICS MECHANISMS AND CATALYSIS 2015. [DOI: 10.1007/s11144-015-0952-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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44
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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.
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Affiliation(s)
- A Meduri
- Dipartimento di Chimica e Biologia, Università di Salerno, via Giovanni Paolo II 132, I-84084, Fisciano, Salerno, Italy
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45
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Zhu JB, Chen EYX. From meso-Lactide to Isotactic Polylactide: Epimerization by B/N Lewis Pairs and Kinetic Resolution by Organic Catalysts. J Am Chem Soc 2015; 137:12506-9. [DOI: 10.1021/jacs.5b08658] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jian-Bo Zhu
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
| | - Eugene Y.-X. Chen
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
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46
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Castro-Osma JA, Alonso-Moreno C, Lara-Sánchez A, Otero A, Fernández-Baeza J, Sánchez-Barba LF, Rodríguez AM. Catalytic behaviour in the ring-opening polymerisation of organoaluminiums supported by bulky heteroscorpionate ligands. Dalton Trans 2015; 44:12388-400. [PMID: 25534594 DOI: 10.1039/c4dt03475a] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of alkyl organoaluminium complexes based on bulky heteroscorpionate ligands were designed as catalysts for the ring-opening polymerisation of cyclic esters. Thus, the treatment of AlX3 (X = Me, Et) with bulky acetamide or thioacetamide heteroscorpionate ligands nbptamH (1) [nbptamH = N-naphthyl-2,2-bis(3,5-dimethylpyrazol-1-yl)thioacetamide], fbpamH (2) [fbpamH = N-fluorenyl-2,2-bis(3,5-dimethylpyrazol-1-yl)acetamide], ptbptamH (3) [ptbptamH = N-phenyl-2,2-bis(3,5-di-tert-butylpyrazol-1-yl)thioacetamide], ntbptamH (4) [ntbptamH = N-naphthyl-2,2-bis(3,5-di-tert-butylpyrazol-1-yl)thioacetamide], ptbpamH (5) [ptbpamH = N-phenyl-2,2-bis(3,5-di-tert-butylpyrazol-1-yl)acetamide] and (S)-mtbpamH (6) [(S)-mtbpamH = (S)-(−)-N-α-methylbenzyl-2,2-bis(3,5-di-tert-butylpyrazol-1-yl)acetamide] for 1 hour at 0 °C afforded the dialkyl aluminium complexes [AlX2{κ(2)-nbptam}] (X = Me 7, Et 8), [AlX2{κ(2)-fbpam}] (X = Me 9, Et 10), [AlX2{κ(2)-ptbptam}] (X = Me 11, Et 12), [AlX2{κ(2)-ntbptam}] (X = Me 13, Et 14), [AlX2{κ2(-)ptbpam}] (X = Me 15, Et 16) and [AlX2{κ(2)-(S)-mtbpam}] (X = Me 17, Et 18). The structures of the complexes were determined by spectroscopic methods and the X-ray crystal structure of 14 was also established. The alkyl-containing aluminium complexes 7–18 can act as efficient single-component initiators for the ring-opening polymerisation of ε-caprolactone and rac-lactide. The polymerisations are living, as evidenced by the narrow polydispersities of the isolated polymers and the linear nature of the number average molecular weight versus conversion plot. Finally, a comparative study of ring-opening polymerisation for new bulky heteroscorpionate aluminium initiators and the less congested aluminium analogues is reported.
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Affiliation(s)
- Jose A Castro-Osma
- Departamento de Química Inorgánica, Orgánica y Bioquímica-Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, 13071-Ciudad Real, Spain.
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47
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Wang X, Brosmer JL, Thevenon A, Diaconescu PL. Highly Active Yttrium Catalysts for the Ring-Opening Polymerization of ε-Caprolactone and δ-Valerolactone. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00442] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xinke Wang
- Department of Chemistry and
Biochemistry, University of California, Los Angeles, 607 Charles
E. Young Drive East, Los Angeles, California 90095, United States
| | - Jonathan L. Brosmer
- Department of Chemistry and
Biochemistry, University of California, Los Angeles, 607 Charles
E. Young Drive East, Los Angeles, California 90095, United States
| | - Arnaud Thevenon
- Department of Chemistry and
Biochemistry, University of California, Los Angeles, 607 Charles
E. Young Drive East, Los Angeles, California 90095, United States
| | - Paula L. Diaconescu
- Department of Chemistry and
Biochemistry, University of California, Los Angeles, 607 Charles
E. Young Drive East, Los Angeles, California 90095, United States
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48
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Averianov IV, Korzhikov VA, Tennikova TB. Synthesis of poly(lactic acid) and the formation of poly(lactic acid)-based supraporous biofunctional materials for tissue engineering. POLYMER SCIENCE SERIES B 2015. [DOI: 10.1134/s1560090415040016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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49
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Gu W, Xu P, Wang Y, Yao Y, Yuan D, Shen Q. Synthesis and Characterization of Yttrium and Ytterbium Complexes Supported by Salen Ligands and Their Catalytic Properties for rac-Lactide Polymerization. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00223] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Weikai Gu
- Key
Laboratory of Organic Synthesis of Jiangsu Province and Suzhou Key
Laboratory of Macromolecular Design and Precision Synthesis, College
of Chemistry, Chemical Engineering and Materials Science, Dushu Lake
Campus, Soochow University, Suzhou 215123 People’s Republic of China
| | - Pengfei Xu
- Key
Laboratory of Organic Synthesis of Jiangsu Province and Suzhou Key
Laboratory of Macromolecular Design and Precision Synthesis, College
of Chemistry, Chemical Engineering and Materials Science, Dushu Lake
Campus, Soochow University, Suzhou 215123 People’s Republic of China
| | - Yaorong Wang
- Key
Laboratory of Organic Synthesis of Jiangsu Province and Suzhou Key
Laboratory of Macromolecular Design and Precision Synthesis, College
of Chemistry, Chemical Engineering and Materials Science, Dushu Lake
Campus, Soochow University, Suzhou 215123 People’s Republic of China
| | - Yingming Yao
- Key
Laboratory of Organic Synthesis of Jiangsu Province and Suzhou Key
Laboratory of Macromolecular Design and Precision Synthesis, College
of Chemistry, Chemical Engineering and Materials Science, Dushu Lake
Campus, Soochow University, Suzhou 215123 People’s Republic of China
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s Republic of China
| | - Dan Yuan
- Key
Laboratory of Organic Synthesis of Jiangsu Province and Suzhou Key
Laboratory of Macromolecular Design and Precision Synthesis, College
of Chemistry, Chemical Engineering and Materials Science, Dushu Lake
Campus, Soochow University, Suzhou 215123 People’s Republic of China
| | - Qi Shen
- Key
Laboratory of Organic Synthesis of Jiangsu Province and Suzhou Key
Laboratory of Macromolecular Design and Precision Synthesis, College
of Chemistry, Chemical Engineering and Materials Science, Dushu Lake
Campus, Soochow University, Suzhou 215123 People’s Republic of China
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50
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Robinson JR, Gu J, Carroll PJ, Schelter EJ, Walsh PJ. Exchange Processes in Shibasaki’s Rare Earth Alkali Metal BINOLate Frameworks and Their Relevance in Multifunctional Asymmetric Catalysis. J Am Chem Soc 2015; 137:7135-44. [DOI: 10.1021/jacs.5b02201] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jerome R. Robinson
- P. Roy and Diana T. Vagelos Laboratories,
Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Jun Gu
- P. Roy and Diana T. Vagelos Laboratories,
Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J. Carroll
- P. Roy and Diana T. Vagelos Laboratories,
Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Eric J. Schelter
- P. Roy and Diana T. Vagelos Laboratories,
Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J. Walsh
- P. Roy and Diana T. Vagelos Laboratories,
Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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