1
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Kricheldorf HR, Weidner SM. Low molar mass cyclic poly(L-lactide)s: separate transesterification reactions of cycles and linear chains in the solid state. SOFT MATTER 2024; 20:6131-6139. [PMID: 39041173 DOI: 10.1039/d4sm00567h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/24/2024]
Abstract
L-Lactide (LA) was polymerized with neat tin(II) 2-ethylhexanoate (SnOct2) in toluene at 115 °C at low concentration with variation of the LA/Cat ratio. Cyclic polylactides (cPLAs) with number average molecular weights (Mn) between 7000 and 17 000 were obtained. MALDI-TOF mass spectrometry also revealed the formation of a few percent of linear chains. Crystalline cPLAs with Mn around 9000 and 14 000 were annealed at 140 °C in the presence of ScOct2 or dibutyl-2-stanna-1,3-dithiolane (DSTL). Simultaneously, crystallites of extended linear chains and crystallites of extended cycles were formed regardless of the catalyst, indicating that transesterification reaction proceeded different for linear chains and for cycles, governed by thermodynamic control. The formation of extended chain crystallites with low dispersity indicates the existence of symproportionation of short and long chains. A complementary experiment was carried out with a PLA ethyl ester composed mainly of linear chains with a small fraction of cycles.
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Affiliation(s)
- Hans R Kricheldorf
- Universität Hamburg, Institut für Technische Chemie und Makromolekulare Chemie, Bundesstr. 45, D-20146 Hamburg, Germany.
| | - Steffen M Weidner
- BAM, Bundesanstalt für Materialforschung und -prüfung, Richard Willstätter Str. 11, D-12489, Berlin, Germany
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2
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Laiwattanapaisarn N, Virachotikul A, Chumsaeng P, Jaenjai T, Phomphrai K. Ring-Opening Co- and Terpolymerization of Epoxides, Cyclic Anhydrides, and l-Lactide Using Constrained Aluminum Inden Complexes. Inorg Chem 2022; 61:20616-20628. [DOI: 10.1021/acs.inorgchem.2c03532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Affiliation(s)
- Nattiya Laiwattanapaisarn
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Wangchan, Rayong21210, Thailand
| | - Arnut Virachotikul
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Wangchan, Rayong21210, Thailand
| | - Phongnarin Chumsaeng
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Wangchan, Rayong21210, Thailand
| | - Tiphanan Jaenjai
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Wangchan, Rayong21210, Thailand
| | - Khamphee Phomphrai
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Wangchan, Rayong21210, Thailand
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3
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Ochs J, Pagnacco CA, Barroso-Bujans F. Macrocyclic polymers: Synthesis, purification, properties and applications. Prog Polym Sci 2022. [DOI: 10.1016/j.progpolymsci.2022.101606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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4
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Glöckler E, Ghosh S, Wölper C, Coban D, Gröschel AH, Schulz S. Binuclear ketodiiminate magnesium complexes for the ROP of cyclic -Lactide and ε-Caprolactone. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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5
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Mao X, Xian J, Wang R, Han X, Pan X, Wu J. Synthesis of Linear to Cyclic Polylactide via a One-Pot Step-Wise Ring-Opening Polymerization and Back-Biting Reaction of Ring Closure Using Magnesium Complexes. Inorg Chem 2022; 61:10722-10730. [PMID: 35771955 DOI: 10.1021/acs.inorgchem.2c00935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The controllable synthesis of cyclic polylactide remains a challenging topic so far. In this work, a new strategy of one-pot step-wise ring-opening polymerization (ROP) followed by a back-biting reaction of ring closure was reported, in which one magnesium atrane-like complex {N,N-bis[3,5-di-cumyl-2-benzyloxy]-[2-(2-aminoethoxy)ethoxy]magnesium} was utilized to initiate the ROP of lactide using 4-dimethylaminopyridine as a co-catalyst; then, macrocyclic polylactides were liberated out via increasing temperature after complete depletion of the monomer in which a back-biting reaction was utilized as a ring-closure method. The living feature at the first ROP stage can be proved well by the controllable molecular weights ranging from 3.10 to 34.70 kDa and narrow molecular weight distributions of linear polylactides obtained after quenching the reaction. The final cyclic polylactides with molecular weights (vs polystyrene) ranging from 2.50 to 16.10 kDa can be achieved too after the back-biting reaction of ring closure. Although a shoulder peak at the gel permeation chromatography profile appears when the ratio of monomer:initiator is high up to 100:1 or 200:1, this system is suitable for the controllable syntheses of cyclic polylactides with desirable modest molecular weights.
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Affiliation(s)
- Xiaoyang Mao
- State Key Laboratory of Applied Organic Chemistry (Lanzhou University), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Ji Xian
- State Key Laboratory of Applied Organic Chemistry (Lanzhou University), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Rui Wang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - Xinning Han
- College of Chemistry and Chemical Engineering, Ningxia Normal University, Guyuan 756000, People's Republic of China
| | - Xiaobo Pan
- State Key Laboratory of Applied Organic Chemistry (Lanzhou University), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Jincai Wu
- State Key Laboratory of Applied Organic Chemistry (Lanzhou University), Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People's Republic of China
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6
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Abstract
ConspectusThis Account discusses the evolution of our strategy to conduct environmentally responsible research in the field of polymer chemistry. To contextualize our work, we begin with a broad historical overview of the modern environmental movement, the rise of sustainability as a concept, and how chemistry has responded to these forces, which were often sharply critical of our field. We then trace our own responses, from graduate school onward, chronicling a series of experiences and research projects that molded, challenged, and reshaped how we think about sustainability in polymer science.Since beginning our independent careers in 2004, we have recognized and worked to resolve the tension between designing synthetic polymers for specific desired thermomechanical properties and minimizing environmental impact. In our early years, we were most strongly guided by the 12 Principles of Green Chemistry (12PGC), which had only recently been proposed. The authors' early research agendas had a rather narrow focus on two areas, specifically catalysis and biobased monomers, which we saw as strongly linked to sustainability. Over time, we found these areas to be too narrow in their focus, ignoring important considerations such as the capacity of monomer supply to support scale-up and the impact polymers have at the end of their usage lifetimes. With respect to monomers and catalysts, we consider descriptive metrics that quantify waste production and the toxicity of compounds used during synthesis. In terms of polymer end-of-life, we discuss hydrophobicity as a tool to help understand susceptibility to degradation in the environment as well as some of the concerns with design for degradation, a critical component of 12PGC.Now, after nearly two decades of investigation, we believe that achieving sustainability in polymer science will require us to move beyond the qualitative use of the 12PGC to a portfolio of metrics. We note a heartening increase in the availability and use of such metrics and tools across the field. These include items that provide limited insight but are relatively trivial to integrate into existing workflows such as E factor or the Toxicity Estimation Software Tool. We also appreciate the increased use of Life Cycle Assessment (LCA), which is both dramatically more thorough and difficult to deploy. Finally, we propose the creation of a national LCA center, similar to instrumental core facilities. Such a resource would enable the use of this tool across multiple phases of research and we hope would more effectively guide us to a sustainable future.
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Affiliation(s)
| | - Robert T Mathers
- Department of Chemistry, Pennsylvania State University, New Kensington, Pennsylvania 15068, United States
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7
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Goonesinghe C, Jung HJ, Roshandel H, Diaz C, Baalbaki HA, Nyamayaro K, Ezhova M, Hosseini K, Mehrkhodavandi P. An Air Stable Cationic Indium Catalyst for Formation of High-Molecular-Weight Cyclic Poly(lactic acid). ACS Catal 2022. [DOI: 10.1021/acscatal.2c02118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chatura Goonesinghe
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Hyuk-Joon Jung
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Hootan Roshandel
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Carlos Diaz
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Hassan A. Baalbaki
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Kudzanai Nyamayaro
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Maria Ezhova
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Kimia Hosseini
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Parisa Mehrkhodavandi
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
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8
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Pongpanit T, Saeteaw T, Chumsaeng P, Chasing P, Phomphrai K. Highly Active Homoleptic Zinc and Magnesium Complexes Supported by Constrained Reduced Schiff Base Ligands for the Ring-Opening Polymerization of Lactide. Inorg Chem 2021; 60:17114-17122. [PMID: 34605644 DOI: 10.1021/acs.inorgchem.1c02382] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
New homoleptic zinc and magnesium complexes containing constrained reduced Schiff base ligands based on substituted 7-hydroxy-1-indanone were successfully synthesized and used as a catalyst for the polymerization of lactide. The ligands contain a side arm having different basicity because dimethylamino, pyridyl, and furfuryl groups are shown to greatly affect the polymerization rates. The homoleptic zinc complex containing constrained reduced Schiff base ligands and a dimethylamino side arm was highly active, giving a 92% conversion of l-lactide in 3 min using [LA]:[Zn]:[BnOH] = 500:1:2 at room temperature. The polymerization is pseudo-first-order dependent on the LA concentration. Well-controlled and living behavior of the zinc complex was observed and demonstrated in the preparation of stereodiblock and triblock copolymers of l-, d-, and rac-lactide in a one-pot sequential synthesis with a predictable block length, block sequence, and narrow dispersity rapidly in 10 min. Stereocomplex formation was observed for PLA made sequentially from 100 l-LA, 100 rac-LA, and 100 d-LA having a high Tm of up to 220 °C.
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Affiliation(s)
- Tanyawan Pongpanit
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
| | - Thonthun Saeteaw
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
| | - Phongnarin Chumsaeng
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
| | - Pongsakorn Chasing
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
| | - Khamphee Phomphrai
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
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9
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Yin K, Hua L, Qu L, Yao Q, Wang Y, Yuan D, You H, Yao Y. Heterobimetallic rare earth metal-zinc catalysts for reactions of epoxides and CO 2 under ambient conditions. Dalton Trans 2021; 50:1453-1464. [PMID: 33439163 DOI: 10.1039/d0dt03772a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four homodinuclear rare earth metal (RE) complexes 1-4 bearing a multidentate diglycolamine-bridged bis(phenolate) ligand were synthesized. In addition, seven heterobimetallic RE-Zn complexes 5-11 were prepared through a one-pot strategy. In these heterobimetallic complexes, two RE centers are bridged by either Zn(OAc)2 or Zn(OBn)2 moieties. All complexes were characterized by single crystal X-ray diffraction, elemental analysis, IR spectroscopy, and multinuclear NMR spectroscopy (in the case of diamagnetic complexes 1, 4, 7 and 11). Moreover, the multi-nuclear structures of complexes 4 and 11 in solution were also studied by 1H DOSY spectroscopy. These complexes were applied in catalyzing the coupling reaction of carbon dioxide (CO2) with epoxides. Zn(OAc)2- and Zn(OBn)2-bridged heterobimetallic complexes showed comparable catalytic activities under ambient conditions and were more active than monometallic RE complexes. Significant synergistic effect in heterobimetallic complexes is observed. Mono-substituted epoxides were converted into cyclic carbonates under 1 atm CO2 at 25 °C in 88-96% yields, whereas di-substituted epoxides reacted under 1 atm CO2 at higher temperatures in 40-80% yields.
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Affiliation(s)
- Kuan Yin
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China.
| | - Linyan Hua
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China.
| | - Liye Qu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China.
| | - Quanyou Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province, 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, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China.
| | - Dan Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China.
| | - Hongpeng You
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China. and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China
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10
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Kerr RWF, Ewing PMDA, Raman SK, Smith AD, Williams CK, Arnold PL. Ultrarapid Cerium(III)–NHC Catalysts for High Molar Mass Cyclic Polylactide. ACS Catal 2021. [DOI: 10.1021/acscatal.0c04858] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ryan W. F. Kerr
- EaStCHEM School of Chemistry, University of Edinburgh, The King’s Buildings, Edinburgh EH9 3FJ, U.K
- EaStCHEM School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, U.K
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Paul M. D. A. Ewing
- EaStCHEM School of Chemistry, University of Edinburgh, The King’s Buildings, Edinburgh EH9 3FJ, U.K
- EaStCHEM School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, U.K
| | - Sumesh K. Raman
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Andrew D. Smith
- EaStCHEM School of Chemistry, University of St. Andrews, North Haugh, St. Andrews KY16 9ST, U.K
| | - Charlotte K. Williams
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Polly L. Arnold
- EaStCHEM School of Chemistry, University of Edinburgh, The King’s Buildings, Edinburgh EH9 3FJ, U.K
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11
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Wang TW, Golder MR. Advancing macromolecular hoop construction: recent developments in synthetic cyclic polymer chemistry. Polym Chem 2021. [DOI: 10.1039/d0py01655a] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Synthetic methodology to access cyclic macromolecules continues to develop via two distinct mechanistic classes: ring-expansion of macrocyclic initiators and ring-closure of functionalized linear polymers.
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Affiliation(s)
- Teng-Wei Wang
- Department of Chemistry
- University of Washington
- Seattle
- USA
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12
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Virachotikul A, Laiwattanapaisarn N, Wongmahasirikun P, Piromjitpong P, Chainok K, Phomphrai K. Ring-Opening Copolymerizaton of Cyclohexene Oxide and Succinic Anhydride by Zinc and Magnesium Schiff-Base Complexes Containing Alkoxy Side Arms. Inorg Chem 2020; 59:8983-8994. [PMID: 32408738 DOI: 10.1021/acs.inorgchem.0c00839] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The ring-opening copolymerization (ROCOP) of epoxides and cyclic anhydrides is a promising method for the synthesis of new polyesters with various polymer properties. Among previously reported metal catalysts for ROCOP, the Schiff-base complexes have gained significant attention because of their ease of synthesis and modification. In this work, zinc and magnesium complexes containing Schiff-base ligands with different alkoxy side arms [-(CH2)2O- and -(CH2)3O-] were synthesized and shown to have a cubane metal core by X-ray crystal structures. All complexes were studied in the ROCOP of cyclohexene oxide (CHO) and succinic anhydride (SA) in toluene at 110 °C. The zinc complex having a shorter side arm is the most active catalyst for copolymerization, giving poly(CHO-alt-SA) with narrow dispersity and negligible ether linkage. On the other hand, magnesium complexes were not active because of the formation of stable carboxylate species. The detailed analysis of polyester obtained from zinc complexes unexpectedly revealed three different types of polymer structures occurring at different polymerization times. Cyclic polymer was generated at the beginning by intramolecular transesterification of the alkoxy side arm, giving a low-molecular-weight polyester. At higher conversion, cyclization diminished, giving just a linear polyester but with minor competitive formation of higher-molecular-weight polyester having cyclohexanediol as an end group. On the basis of a thorough understanding of the polymerization mechanism, the desired cyclic poly(CHO-alt-SA) was successfully synthesized using a low monomer/catalyst ratio.
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Affiliation(s)
- Arnut Virachotikul
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Wangchan, Rayong 21210, Thailand
| | - Nattiya Laiwattanapaisarn
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Wangchan, Rayong 21210, Thailand
| | - Phonpimon Wongmahasirikun
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Wangchan, Rayong 21210, Thailand
| | - Parichat Piromjitpong
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Wangchan, Rayong 21210, Thailand
| | - Kittipong Chainok
- Materials and Textile Technology, Faculty of Science and Technology, Thammasat University, Khlong Luang, Pathum Thani 12121, Thailand
| | - Khamphee Phomphrai
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Wangchan, Rayong 21210, Thailand.,Research Network of NANOTEC-VISTEC on Nanotechnology for Energy, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
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13
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Ungpittagul T, Wongmahasirikun P, Phomphrai K. Synthesis and characterization of guanidinate tin(ii) complexes for ring-opening polymerization of cyclic esters. Dalton Trans 2020; 49:8460-8471. [PMID: 32315017 DOI: 10.1039/d0dt01115k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Novel homoleptic and heteroleptic (guanidinate)tin(ii) complexes were successfully synthesized and structurally characterized. The first heteroleptic (guanidinato)tin(ii) alkoxide complex was synthesized but found to be unstable leading to the corresponding bis(guanidinate)tin(ii) complex. The catalytic activities of bis(guanidinate)tin(ii) complexes having different substituents at the nitrogen atoms (isopropyl (1), cyclohexyl (2), and p-tolyl (3)) were investigated in the ring-opening polymerization (ROP) of ε-caprolactone (ε-CL) and lactide (LA). The lone-pair electrons of the tin(ii) atom were proposed to act as an initiator similar to N-heterocyclic carbenes. Among the synthesized catalysts, complex 1 having less steric hindrance efficiently catalyzed both homo- and copolymerizations of ε-CL and LA giving high molecular weight cyclic polyesters. Transesterification was found to be the major contributor to the cyclization to cyclic polyesters.
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Affiliation(s)
- Thasanaporn Ungpittagul
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand.
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14
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Impemba S, Della Monica F, Grassi A, Capacchione C, Milione S. Cyclic Polyester Formation with an [OSSO]-Type Iron(III) Catalyst. CHEMSUSCHEM 2020; 13:141-145. [PMID: 31560149 DOI: 10.1002/cssc.201902163] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 09/22/2019] [Indexed: 06/10/2023]
Abstract
The efficient formation of cyclic polyesters from the ring-opening polymerization of lactide, ϵ-caprolactone, and β-butyrolactone catalyzed by a 1,4-dithiabutanedyl-2,2'-bis(4,6-dicumylphenol) [OSSO]-FeCl complex activated with cyclohexene oxide was achieved. The catalyst was very active (initial turnover frequency up to 2718 h-1 ), robust, and worked with a monomer/Fe ratio up to 10 000. The formation of cyclic polymers was supported by using high-resolution matrix-assisted laser desorption ionization (MALDI) MS, and the average ring size (≈5 kDa for cyclic polylactide) independent of the reaction conditions. A monometallic ring-opening polymerization/cyclization mechanism was proposed from the results of a kinetic investigation.
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Affiliation(s)
- Salvatore Impemba
- Dipartimento di Chimica e Biologia "Adolfo Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 132-, 84084, Fisciano (SA), Italy
| | - Francesco Della Monica
- Dipartimento di Chimica e Biologia "Adolfo Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 132-, 84084, Fisciano (SA), Italy
| | - Alfonso Grassi
- Dipartimento di Chimica e Biologia "Adolfo Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 132-, 84084, Fisciano (SA), Italy
| | - Carmine Capacchione
- Dipartimento di Chimica e Biologia "Adolfo Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 132-, 84084, Fisciano (SA), Italy
| | - Stefano Milione
- Dipartimento di Chimica e Biologia "Adolfo Zambelli", Università degli Studi di Salerno, Via Giovanni Paolo II, 132-, 84084, Fisciano (SA), Italy
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15
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Tanaka D, Kadonaga Y, Manabe Y, Fukase K, Sasaya S, Maruyama H, Nishimura S, Yanagihara M, Konishi A, Yasuda M. Synthesis of Cage-Shaped Aluminum Aryloxides: Efficient Lewis Acid Catalyst for Stereoselective Glycosylation Driven by Flexible Shift of Four- to Five-Coordination. J Am Chem Soc 2019; 141:17466-17471. [DOI: 10.1021/jacs.9b08875] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Daiki Tanaka
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yuichiro Kadonaga
- Division of Science, Institute for Radiation Sciences, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Yoshiyuki Manabe
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- Core for Medicine and Science Collaborative Research and Education, Project Research Center for Fundamental Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Koichi Fukase
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- Core for Medicine and Science Collaborative Research and Education, Project Research Center for Fundamental Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Shota Sasaya
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hikaru Maruyama
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Sota Nishimura
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Mayu Yanagihara
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Akihito Konishi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Center for Atomic and Molecular Technologies, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Makoto Yasuda
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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16
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Petrus R, Sobota P. Magnesium and zinc alkoxides and aryloxides supported by commercially available ligands as promoters of chemical transformations of lactic acid derivatives to industrially important fine chemicals. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.06.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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17
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Praban S, Yimthachote S, Kiriratnikom J, Chotchatchawankul S, Tantirungrotechai J, Phomphrai K. Synthesis and characterizations of bis(phenoxy)‐amine tin(II) complexes for ring‐opening polymerization of lactide. ACTA ACUST UNITED AC 2019. [DOI: 10.1002/pola.29479] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Siriwan Praban
- Center for Catalysis, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of ScienceMahidol University Rama 6 Road Bangkok 10400 Thailand
| | - Supajittra Yimthachote
- Department of Materials Science and Engineering, School of Molecular Science and EngineeringVidyasirimedhi Institute of Science and Technology, Wangchan Rayong 21210 Thailand
| | - Jiraya Kiriratnikom
- Center for Catalysis, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of ScienceMahidol University Rama 6 Road Bangkok 10400 Thailand
| | - Sucheewin Chotchatchawankul
- Department of Materials Science and Engineering, School of Molecular Science and EngineeringVidyasirimedhi Institute of Science and Technology, Wangchan Rayong 21210 Thailand
| | - Jonggol Tantirungrotechai
- Center for Catalysis, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of ScienceMahidol University Rama 6 Road Bangkok 10400 Thailand
| | - Khamphee Phomphrai
- Department of Materials Science and Engineering, School of Molecular Science and EngineeringVidyasirimedhi Institute of Science and Technology, Wangchan Rayong 21210 Thailand
- Research Network of NANOTEC‐VISTEC on Nanotechnology for Energy, Vidyasirimedhi Institute of Science and Technology, Wangchan Rayong 21210 Thailand
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18
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Shaik M, Peterson J, Du G. Cyclic and Linear Polyhydroxylbutyrates from Ring-Opening Polymerization of β-Butyrolactone with Amido-Oxazolinate Zinc Catalysts. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b02096] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Muneer Shaik
- Department of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks, North Dakota 58202, United States
| | - Jhaiquashia Peterson
- Department of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks, North Dakota 58202, United States
| | - Guodong Du
- Department of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks, North Dakota 58202, United States
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19
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Mase N, Moniruzzaman, Yamamoto S, Nakaya Y, Sato K, Narumi T. Organocatalytic Stereoselective Cyclic Polylactide Synthesis in Supercritical Carbon Dioxide under Plasticizing Conditions. Polymers (Basel) 2018; 10:E713. [PMID: 30960638 PMCID: PMC6404224 DOI: 10.3390/polym10070713] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 06/23/2018] [Accepted: 06/26/2018] [Indexed: 11/16/2022] Open
Abstract
Cyclic polylactide (cPLA) is a structural isomer of linear polylactide (PLA) although it possesses unique functionalities in comparison to its linear counterpart. Hitherto, the control of stereochemical purity in conventional cPLA synthesis has not been achieved. In this study, highly stereochemically pure cPLA was synthesized in the absence of a metal catalyst and organic solvent, which required high consumption of the residual monomer. The synthesis was conducted in supercritical carbon dioxide under CO₂ plasticizing polymerization conditions in the presence of an organocatalyst and thiourea additives. In comparison with the stereocomplexes synthesized through conventional methods, cPLA from l-lactide (cPLLA) and cPLA from d-lactide (cPDLA) were synthesized with higher stereochemical purity and improved thermal stability. Moreover, the method presented herein is environmentally friendly and thus, applicable on an industrial level.
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Affiliation(s)
- Nobuyuki Mase
- Department of Engineering, Graduate School of Integrated Science and Technology, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizuoka 432-8561, Japan; (M.); (S.Y.); (Y.N.); (K.S.); (T.N.)
- Graduate School of Science and Technology, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizuoka 432-8561, Japan
- Research Institute of Green Science and Technology, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizuoka 432-8561, Japan
| | - Moniruzzaman
- Department of Engineering, Graduate School of Integrated Science and Technology, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizuoka 432-8561, Japan; (M.); (S.Y.); (Y.N.); (K.S.); (T.N.)
| | - Shoji Yamamoto
- Department of Engineering, Graduate School of Integrated Science and Technology, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizuoka 432-8561, Japan; (M.); (S.Y.); (Y.N.); (K.S.); (T.N.)
| | - Yoshitaka Nakaya
- Department of Engineering, Graduate School of Integrated Science and Technology, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizuoka 432-8561, Japan; (M.); (S.Y.); (Y.N.); (K.S.); (T.N.)
| | - Kohei Sato
- Department of Engineering, Graduate School of Integrated Science and Technology, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizuoka 432-8561, Japan; (M.); (S.Y.); (Y.N.); (K.S.); (T.N.)
| | - Tetsuo Narumi
- Department of Engineering, Graduate School of Integrated Science and Technology, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizuoka 432-8561, Japan; (M.); (S.Y.); (Y.N.); (K.S.); (T.N.)
- Graduate School of Science and Technology, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizuoka 432-8561, Japan
- Research Institute of Green Science and Technology, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizuoka 432-8561, Japan
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20
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Li P, Xi Y, Li L, Li H, Sun WH, Lei M. A DFT study on ring-opening polymerization of ε-caprolactone initiated by Mg and Al complexes. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.02.033] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Lapenta R, De Simone NA, Buonerba A, Talotta C, Gaeta C, Neri P, Grassi A, Milione S. Dinuclear zirconium complex bearing a 1,5-bridged-calix[8]arene ligand as an effective catalyst for the synthesis of macrolactones. Catal Sci Technol 2018. [DOI: 10.1039/c7cy02537h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
“Macrocyclization of Cycles with a Macrocycle.” The intramolecular cooperation of metal centres in a novel dinuclear complex has been postulated as responsible for the observed high rate of formation of macrocyclic polyesters.
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Affiliation(s)
- Rosita Lapenta
- Dipartimento di Chimica e Biologia
- Università degli Studi di Salerno
- 84084 Fisciano (SA)
- Italy
| | | | - Antonio Buonerba
- Dipartimento di Chimica e Biologia
- Università degli Studi di Salerno
- 84084 Fisciano (SA)
- Italy
- Interuniversity Consortium Chemical Reactivity and Catalysis
| | - Carmen Talotta
- Dipartimento di Chimica e Biologia
- Università degli Studi di Salerno
- 84084 Fisciano (SA)
- Italy
| | - Carmine Gaeta
- Dipartimento di Chimica e Biologia
- Università degli Studi di Salerno
- 84084 Fisciano (SA)
- Italy
| | - Placido Neri
- Dipartimento di Chimica e Biologia
- Università degli Studi di Salerno
- 84084 Fisciano (SA)
- Italy
| | - Alfonso Grassi
- Dipartimento di Chimica e Biologia
- Università degli Studi di Salerno
- 84084 Fisciano (SA)
- Italy
- Interuniversity Consortium Chemical Reactivity and Catalysis
| | - Stefano Milione
- Dipartimento di Chimica e Biologia
- Università degli Studi di Salerno
- 84084 Fisciano (SA)
- Italy
- Interuniversity Consortium Chemical Reactivity and Catalysis
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22
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Marszałek-Harych A, Jędrzkiewicz D, Ejfler J. Bio- and chemocatalysis cascades as a bridge between biology and chemistry for green polymer synthesis. Cell Mol Biol Lett 2017; 22:28. [PMID: 29225630 PMCID: PMC5715637 DOI: 10.1186/s11658-017-0061-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 11/23/2017] [Indexed: 02/08/2023] Open
Abstract
The development and integration of bio- and chemocatalytic processes to convert renewable or biomass feedstocks into polymers is a vibrant field of research with enormous potential for environmental protection and the mitigation of global warming. Here, we review the biotechnological and chemical synthetic strategies for producing platform monomers from bio-based sources and transforming them into eco-polymers. We also discuss their advanced bio-application using the example of polylactide (PLA), the most valuable green polymer on the market.
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Affiliation(s)
| | - Dawid Jędrzkiewicz
- Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
| | - Jolanta Ejfler
- Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
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23
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Luo Z, Chaemchuen S, Zhou K, Verpoort F. Ring-Opening Polymerization of l-Lactide to Cyclic Poly(Lactide) by Zeolitic Imidazole Framework ZIF-8 Catalyst. CHEMSUSCHEM 2017; 10:4135-4139. [PMID: 28925025 DOI: 10.1002/cssc.201701438] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 09/17/2017] [Indexed: 06/07/2023]
Abstract
The catalytic activity of ZIF-8 in the ring-opening polymerization of l-lactide without solvents or cocatalysts is presented for the first time. Two different synthetic strategies have been applied for synthesizing ZIF-8, either under solvothermal condition or by spray-drying procedure. Their catalytic activities are found to be correlating with the presence of open active sites in ZIF-8 structure. The structural defects that afford active acid and basic sites are supposed to cooperatively catalyze the reaction. ZIF-8 assembled by spray-drying technique, displays a superior catalytic activity at temperature of 160 °C, leading to the formation of high molecular weight cyclic polylactide. The ZIF-8 catalysts could be recycled and reused without any significant loss of catalytic activity.
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Affiliation(s)
- Zhixiong Luo
- Laboratory of Organometallics, Catalysis and Ordered Materials, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing; Center for Chemical and Material Engineering, Wuhan University of Technology, Wuhan, P. R. China
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, P .R. China
- Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281-S3, 9000, Ghent, Belgium
| | - Somboon Chaemchuen
- Laboratory of Organometallics, Catalysis and Ordered Materials, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing; Center for Chemical and Material Engineering, Wuhan University of Technology, Wuhan, P. R. China
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, P .R. China
| | - Kui Zhou
- Laboratory of Organometallics, Catalysis and Ordered Materials, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing; Center for Chemical and Material Engineering, Wuhan University of Technology, Wuhan, P. R. China
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Francis Verpoort
- Laboratory of Organometallics, Catalysis and Ordered Materials, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing; Center for Chemical and Material Engineering, Wuhan University of Technology, Wuhan, P. R. China
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, 430070, P .R. China
- Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281-S3, 9000, Ghent, Belgium
- National Research Tomsk Polytechnic University, Lenin Avenue 30, Tomsk, 634050, Russian Federation
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24
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Hossain MK, Schachner JA, Haukka M, Lehtonen A, Mösch-Zanetti NC, Nordlander E. Dioxidomolybdenum(VI) and -tungsten(VI) complexes with tripodal amino bisphenolate ligands as epoxidation and oxo-transfer catalysts. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.04.036] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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25
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Chang YA, Waymouth RM. Recent progress on the synthesis of cyclic polymers via ring-expansion strategies. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28635] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Young A. Chang
- Department of Chemistry; Stanford University; Stanford California 94305
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26
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Cols JMEP, Taylor CE, Gagnon KJ, Teat SJ, McIntosh RD. Well-defined Ti 4 pre-catalysts for the ring-opening polymerisation of lactide. Dalton Trans 2016; 45:17729-17738. [PMID: 27766320 DOI: 10.1039/c6dt03842e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The synthesis and full characterisation of four discrete tetrametallic titanium complexes is reported. These well-defined compounds are isostructural in the solid state and share the same general formula: Ti4(μ-O)2L4 (L = 1, 2, 3 or 4). Using a combination of NMR techniques the complexes are found to be stable in solution, even at elevated temperatures. Further studies show that the carboxylate moieties of the supporting amine bis(phenolate) ligands can be displaced by a more strongly coordinating solvent. This reversible process causes the coordinatively saturated Ti4(μ-O)2L4 complexes to separate into two Ti2(μ-O)L2 subunits which we envisaged would be catalytically active. Proof-of-concept experiments establish that all four of these complexes display catalytic activity in the ring-opening polymerisation of rac-lactide. These aggregates can therefore be viewed as air and moisture stable pre-catalysts for a range of reactions.
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Affiliation(s)
- Jean-Marie E P Cols
- Institute of Chemical Sciences Heriot-Watt University, Riccarton, Edinburgh, EH14 4AS, UK.
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27
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Gianopoulos CG, Kumar N, Zhao Y, Jia L, Kirschbaum K, Mason MR. Aluminum alkoxide, amide and halide complexes supported by a bulky dipyrromethene ligand: synthesis, characterization, and preliminary ε-caprolactone polymerization activity. Dalton Trans 2016; 45:13787-97. [PMID: 27484717 DOI: 10.1039/c6dt02449a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aluminum halide, alkoxide and amide complexes 2-6 of the form (N,N)AlX2-nYn (n = 0, 1 and (N,N) = 1,9-dimesityl-5-phenyldipyrromethene (1)) were synthesized and characterized by NMR spectroscopy and X-ray crystallography. The in situ generated lithium salt of dipyrromethene 1 was reacted with AlX3 to afford aluminum halide complexes (N,N)AlX2 (X = Cl (2), I (3)) which were isolated as dichroic crystals. Salt metathesis reactions were employed to produce alkoxide complexes (N,N)Al(Cl)(O(t)Bu) (4) and (N,N)Al(O(t)Bu)2 (5) from compound 2. The dimethylamide complex (N,N)Al(NMe2)2 (6) was prepared by reaction of dipyrromethene 1 with [Al(NMe2)3]2. Crystallographic data revealed that the dipyrromethene is non-planar when bulky coligands are present as in compounds 3-6, while in the dichloride complex 2 the dipyrromethene is planar. Halide complexes 2 and 3 reacted with adventitious moisture in toluene to afford crystalline acid-base adducts (N,N)H·HX, (X = Cl (7), I (8)), which adopted structures reminiscent of anion receptors. Alkoxide and dimethylamide complexes 5 and 6 were also applied as precatalysts for the ring-opening polymerization of ε-caprolactone and preliminary results are reported.
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Affiliation(s)
- Christopher G Gianopoulos
- Department of Chemistry, School of Green Chemistry and Engineering, The University of Toledo, Toledo, Ohio 43606-3390, USA.
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28
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Li J, Deng Y, Jie S, Li BG. Zinc complexes supported by (benzimidazolyl)pyridine alcohol ligands as highly efficient initiators for ring-opening polymerization of ε-caprolactone. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.08.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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29
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Nomura K, Shinmura R, Pivsa-Art W, Khawdas W, Aso Y, Ohara H. Interactions between cyclic oligo(l-lactic acid) and alkali metal ions in organic solvent. JOURNAL OF POLYMER RESEARCH 2015. [DOI: 10.1007/s10965-015-0826-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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30
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Dupé A, Hossain MK, Schachner JA, Belaj F, Lehtonen A, Nordlander E, Mösch‐Zanetti NC. Dioxomolybdenum(VI) and ‐tungsten(VI) Complexes with Multidentate Aminobisphenol Ligands as Catalysts for Olefin Epoxidation. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500055] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Antoine Dupé
- Institute of Chemistry, Department of Inorganic Chemistry, University of Graz, Schubertstraße 1, 8010 Graz, Austria, http://chemie.uni‐graz.at/en/inorganic‐chemistry/research/moesch‐zanetti‐group
| | - Md. Kamal Hossain
- Inorganic Chemistry Research Group, Chemical Physics, Centre for Chemistry and Chemical Engineering, Lund University, Box 124, 22100 Lund, Sweden, http://www.chemphys.lu.se/people/nordlander/
| | - Jörg A. Schachner
- Institute of Chemistry, Department of Inorganic Chemistry, University of Graz, Schubertstraße 1, 8010 Graz, Austria, http://chemie.uni‐graz.at/en/inorganic‐chemistry/research/moesch‐zanetti‐group
| | - Ferdinand Belaj
- Institute of Chemistry, Department of Inorganic Chemistry, University of Graz, Schubertstraße 1, 8010 Graz, Austria, http://chemie.uni‐graz.at/en/inorganic‐chemistry/research/moesch‐zanetti‐group
| | - Ari Lehtonen
- Department of Chemistry, University of Turku, 20014 Turku, Finland, http://www.utu.fi/en/units/sci/units/chemistry/research/mcca/Pages/Sub‐pages%20of%20Functional%20Materials/Metal‐ organic‐Chemistry.aspx
| | - Ebbe Nordlander
- Inorganic Chemistry Research Group, Chemical Physics, Centre for Chemistry and Chemical Engineering, Lund University, Box 124, 22100 Lund, Sweden, http://www.chemphys.lu.se/people/nordlander/
| | - Nadia C. Mösch‐Zanetti
- Institute of Chemistry, Department of Inorganic Chemistry, University of Graz, Schubertstraße 1, 8010 Graz, Austria, http://chemie.uni‐graz.at/en/inorganic‐chemistry/research/moesch‐zanetti‐group
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31
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Bonnet F, Stoffelbach F, Fontaine G, Bourbigot S. Continuous cyclo-polymerisation of l-lactide by reactive extrusion using atoxic metal-based catalysts: easy access to well-defined polylactide macrocycles. RSC Adv 2015. [DOI: 10.1039/c4ra16634e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Macrocyclic polylactide was synthesized by reactive extrusion polymerisation of l-lactide using lanthanide trisborohydrides as the catalysts. This is the first example of a cyclic polyester obtained directly via a continuous process.
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Affiliation(s)
- Fanny Bonnet
- Unité de Catalyse et de Chimie du Solide
- CNRS
- UMR 8181
- Université Lille 1
- 59655 Villeneuve d'Ascq
| | | | - Gaelle Fontaine
- Unité Matériaux Et Transformation
- CNRS
- UMR 8207
- Ecole Nationale Supérieure de Chimie de Lille (ENSCL)
- 59652 Villeneuve d'Ascq
| | - Serge Bourbigot
- Unité Matériaux Et Transformation
- CNRS
- UMR 8207
- Ecole Nationale Supérieure de Chimie de Lille (ENSCL)
- 59652 Villeneuve d'Ascq
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32
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Wongmahasirikun P, Prom-on P, Sangtrirutnugul P, Kongsaeree P, Phomphrai K. Synthesis of cyclic polyesters: effects of alkoxy side chains in salicylaldiminato tin(ii) complexes. Dalton Trans 2015; 44:12357-64. [DOI: 10.1039/c5dt00139k] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new salicylaldiminato tin(ii) catalyst system having alkoxy side chains has been developed and shown to effectively polymerize l-lactide and ε-caprolactone giving cyclic PLA and cyclic PCL, respectively.
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Affiliation(s)
- Phonpimon Wongmahasirikun
- Center for Catalysis
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Mahidol University
- Bangkok 10400
| | - Paweenuch Prom-on
- Center for Catalysis
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Mahidol University
- Bangkok 10400
| | - Preeyanuch Sangtrirutnugul
- Center for Catalysis
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Mahidol University
- Bangkok 10400
| | - Palangpon Kongsaeree
- Center for Catalysis
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Mahidol University
- Bangkok 10400
| | - Khamphee Phomphrai
- Center for Catalysis
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Mahidol University
- Bangkok 10400
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33
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Jędrzkiewicz D, Ejfler J, Gulia N, John Ł, Szafert S. Designing ancillary ligands for heteroleptic/homoleptic zinc complex formation: synthesis, structures and application in ROP of lactides. Dalton Trans 2015; 44:13700-15. [DOI: 10.1039/c5dt01553g] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesis and characterization of a series of new amino-phenol/naphthol ligands (L1,2-H) have been developed and their respective zinc complexes (1 and 2-Zn) have been synthesized.
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Affiliation(s)
- D. Jędrzkiewicz
- Department of Chemistry
- University of Wrocław
- 50-383 Wrocław
- Poland
| | - J. Ejfler
- Department of Chemistry
- University of Wrocław
- 50-383 Wrocław
- Poland
| | - N. Gulia
- Department of Chemistry
- University of Wrocław
- 50-383 Wrocław
- Poland
| | - Ł. John
- Department of Chemistry
- University of Wrocław
- 50-383 Wrocław
- Poland
| | - S. Szafert
- Department of Chemistry
- University of Wrocław
- 50-383 Wrocław
- Poland
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34
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Scheiper C, Dittrich D, Wölper C, Bläser D, Roll J, Schulz S. Synthesis, Structure, and Catalytic Activity of Tridentate, Base-Functionalized β-Ketiminate Zinc Complexes in Ring-Opening Polymerization of Lactide. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201301462] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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35
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Wojtaszak J, Mierzwicki K, Szafert S, Gulia N, Ejfler J. Homoleptic aminophenolates of Zn, Mg and Ca. Synthesis, structure, DFT studies and polymerization activity in ROP of lactides. Dalton Trans 2014; 43:2424-36. [DOI: 10.1039/c3dt52868e] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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36
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Hänninen MM, Peuronen A, Damlin P, Tyystjärvi V, Kivelä H, Lehtonen A. Vanadium complexes with multidentate amine bisphenols. Dalton Trans 2014; 43:14022-8. [DOI: 10.1039/c4dt01007h] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Amine bisphenols react with VO(acac)2 to yield V(iv) or V(v) complexes depending on the additional hydroxyl donor in the ligand side-arm.
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Affiliation(s)
- M. M. Hänninen
- Laboratory of Inorganic Chemistry
- Department of Chemistry
- University of Jyväskylä
- FI-40014 Jyväskylä, Finland
- Department of Chemistry and Biochemistry
| | - A. Peuronen
- Laboratory of Inorganic Chemistry
- Department of Chemistry
- University of Jyväskylä
- FI-40014 Jyväskylä, Finland
| | - P. Damlin
- Laboratory of Materials Chemistry and Chemical Analysis
- Department of Chemistry
- University of Turku
- Turku, Finland
| | - V. Tyystjärvi
- Laboratory of Materials Chemistry and Chemical Analysis
- Department of Chemistry
- University of Turku
- Turku, Finland
| | - H. Kivelä
- Laboratory of Materials Chemistry and Chemical Analysis
- Department of Chemistry
- University of Turku
- Turku, Finland
| | - A. Lehtonen
- Laboratory of Materials Chemistry and Chemical Analysis
- Department of Chemistry
- University of Turku
- Turku, Finland
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37
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Piedra-Arroni E, Ladavière C, Amgoune A, Bourissou D. Ring-Opening Polymerization with Zn(C6F5)2-Based Lewis Pairs: Original and Efficient Approach to Cyclic Polyesters. J Am Chem Soc 2013; 135:13306-9. [DOI: 10.1021/ja4069968] [Citation(s) in RCA: 148] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Estefanía Piedra-Arroni
- Laboratoire Hétérochimie
Fondamentale et Appliquée, UMR CNRS 5069, Université de Toulouse, F-31062 Toulouse, France
| | - Catherine Ladavière
- Ingénierie
des Matériaux Polymères, UMR CNRS 5223, Université Claude Bernard Lyon 1, 69622 Villeurbanne Cedex, France
| | - Abderrahmane Amgoune
- Laboratoire Hétérochimie
Fondamentale et Appliquée, UMR CNRS 5069, Université de Toulouse, F-31062 Toulouse, France
| | - Didier Bourissou
- Laboratoire Hétérochimie
Fondamentale et Appliquée, UMR CNRS 5069, Université de Toulouse, F-31062 Toulouse, France
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38
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Castro-Osma JA, Alonso-Moreno C, García-Martinez JC, Fernández-Baeza J, Sánchez-Barba LF, Lara-Sánchez A, Otero A. Ring-Opening (ROP) versus Ring-Expansion (REP) Polymerization of ε-Caprolactone To Give Linear or Cyclic Polycaprolactones. Macromolecules 2013. [DOI: 10.1021/ma401216u] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- José A. Castro-Osma
- Facultad de
Ciencias y Tecnología
Química de Ciudad Real, Departamento de Química Inorgánica,
Orgánica y Bioquímica, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain
| | - Carlos Alonso-Moreno
- Facultad de Farmacia de Albacete,
Departamento de Química Inorgánica, Orgánica
y Bioquímica, Universidad de Castilla-La Mancha, 02071 Albacete, Spain
| | - Joaquín C. García-Martinez
- Facultad de Farmacia de Albacete,
Departamento de Química Inorgánica, Orgánica
y Bioquímica, Universidad de Castilla-La Mancha, 02071 Albacete, Spain
| | - Juan Fernández-Baeza
- Facultad de
Ciencias y Tecnología
Química de Ciudad Real, Departamento de Química Inorgánica,
Orgánica y Bioquímica, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain
| | - Luis F. Sánchez-Barba
- Facultad de
Ciencias y Tecnología
Química de Ciudad Real, Departamento de Química Inorgánica,
Orgánica y Bioquímica, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain
| | - Agustín Lara-Sánchez
- Facultad de
Ciencias y Tecnología
Química de Ciudad Real, Departamento de Química Inorgánica,
Orgánica y Bioquímica, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain
| | - Antonio Otero
- Facultad de
Ciencias y Tecnología
Química de Ciudad Real, Departamento de Química Inorgánica,
Orgánica y Bioquímica, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain
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39
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Scheiper C, Schulz S, Wölper C, Bläser D, Roll J. Synthesis and Single Crystal X-ray Structures of Cationic Zincβ-Diketiminate Complexes. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201300119] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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40
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Reisberg SH, Hurley HJ, Mathers RT, Tanski JM, Getzler YDYL. Lactide Cyclopolymerization Kinetics, X-ray Structure, and Solution Dynamics of (tBu-SalAmEE)Al and a Cautionary Tale Of Polymetalate Formation. Macromolecules 2013. [DOI: 10.1021/ma400046x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
| | - Harry J. Hurley
- Department
of Chemistry, Kenyon College, Gambier,
Ohio 43022, United States
| | - Robert T. Mathers
- Deparment of Chemistry, The Pennsylvania State University, New Kensington,
Pennsylvania 15068, United States
| | - Joseph M. Tanski
- Department of Chemistry, Vassar College, 124 Raymond Avenue, Box 601, Poughkeepsie,
New York 12604, United States
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41
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Petrus R, Sobota P. Zinc complexes supported by methyl salicylato ligands: synthesis, structure, and application in ring-opening polymerization of l-lactide. Dalton Trans 2013; 42:13838-44. [DOI: 10.1039/c3dt51200b] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Bouyhayi M, Sarazin Y, Casagrande OL, Carpentier JF. Aluminum, calcium and zinc complexes supported by potentially tridentate iminophenolate ligands: synthesis and use in the ring-opening polymerization of lactide. Appl Organomet Chem 2012. [DOI: 10.1002/aoc.2909] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Miloud Bouyhayi
- Institut des Sciences Chimiques de Rennes, Organometallics: Materials and Catalysis laboratories, UMR 6226 CNRS; University of Rennes 1; Rennes; 35042 Cedex; France
| | - Yann Sarazin
- Institut des Sciences Chimiques de Rennes, Organometallics: Materials and Catalysis laboratories, UMR 6226 CNRS; University of Rennes 1; Rennes; 35042 Cedex; France
| | - Osvaldo L. Casagrande
- Laboratório de Catálise Molecular, Instituto de Química; Universidade Federal do Rio Grande do Sul; Porto Alegre; RS 90501-970; Brazil
| | - Jean-François Carpentier
- Institut des Sciences Chimiques de Rennes, Organometallics: Materials and Catalysis laboratories, UMR 6226 CNRS; University of Rennes 1; Rennes; 35042 Cedex; France
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43
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Martínez G, Cuenca T, Mosquera MEG. Effect of the Nitrogen Substituent on the Reactions of Alane towards Imino‐ and Aminophenols: Generation of a Dinuclear Aluminoxane. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200255] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Gema Martínez
- Departamento de Química Inorgánica, Facultad de Farmacia, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, Fax: +34‐918854683
| | - Tomás Cuenca
- Departamento de Química Inorgánica, Facultad de Farmacia, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, Fax: +34‐918854683
| | - Marta E. G. Mosquera
- Departamento de Química Inorgánica, Facultad de Farmacia, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain, Fax: +34‐918854683
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