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51
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Yang B, Pang W, Chen M. Redox Control in Olefin Polymerization Catalysis by Phosphine–Sulfonate Palladium and Nickel Complexes. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700214] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Bangpei Yang
- Department of Polymer Science and Engineering University of Science and Technology of China 230026 Hefei China
| | - Wenmin Pang
- Department of Polymer Science and Engineering University of Science and Technology of China 230026 Hefei China
| | - Min Chen
- Department of Polymer Science and Engineering University of Science and Technology of China 230026 Hefei China
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52
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Semwal S, Choudhury J. Switch in Catalyst State: Single Bifunctional Bi-state Catalyst for Two Different Reactions. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702142] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Shrivats Semwal
- Organometallics & Smart Materials Laboratory, Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal 462066 India
| | - Joyanta Choudhury
- Organometallics & Smart Materials Laboratory, Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal 462066 India
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53
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Semwal S, Choudhury J. Switch in Catalyst State: Single Bifunctional Bi-state Catalyst for Two Different Reactions. Angew Chem Int Ed Engl 2017; 56:5556-5560. [DOI: 10.1002/anie.201702142] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 03/22/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Shrivats Semwal
- Organometallics & Smart Materials Laboratory, Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal 462066 India
| | - Joyanta Choudhury
- Organometallics & Smart Materials Laboratory, Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal 462066 India
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54
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Aucamp D, Witteler T, Dielmann F, Siangwata S, Liles DC, Smith GS, Bezuidenhout DI. A Triarylated 1,2,3-Triazol-5-ylidene Ligand with a Redox-Active Ferrocenyl Substituent for Rhodium(I)-Catalyzed Hydroformylation of 1-Octene. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700164] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Danielle Aucamp
- Chemistry Department; University of Pretoria; Private Bag X20, Hatfield 0028 Pretoria South Africa
| | - Tim Witteler
- Institut für Anorganische und Analytische Chemie; Westfälische Wilhelms-Universität Münster; Corrensstrasse 30 48149 Münster Germany
| | - Fabian Dielmann
- Institut für Anorganische und Analytische Chemie; Westfälische Wilhelms-Universität Münster; Corrensstrasse 30 48149 Münster Germany
| | - Shepherd Siangwata
- Department of Chemistry; University of Cape Town; 7701 Rondebosch South Africa
| | - David C. Liles
- Chemistry Department; University of Pretoria; Private Bag X20, Hatfield 0028 Pretoria South Africa
| | - Gregory S. Smith
- Department of Chemistry; University of Cape Town; 7701 Rondebosch South Africa
| | - Daniela I. Bezuidenhout
- Chemistry Department; University of Pretoria; Private Bag X20, Hatfield 0028 Pretoria South Africa
- Molecular Sciences Institute; School of Chemistry; University of the Witwatersrand; 2050 Johannesburg South Africa
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55
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Wei J, Riffel MN, Diaconescu PL. Redox Control of Aluminum Ring-Opening Polymerization: A Combined Experimental and DFT Investigation. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02402] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Junnian Wei
- Department of Chemistry and
Biochemistry, University of California, Los Angeles, 607 Charles
E. Young Drive East, Los Angeles, California 90095, United States
| | - Madeline N. Riffel
- 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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56
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Lastovickova DN, Shao H, Lu G, Liu P, Bielawski CW. A Ring-Opening Metathesis Polymerization Catalyst That Exhibits Redox-Switchable Monomer Selectivities. Chemistry 2017; 23:5994-6000. [PMID: 27977049 DOI: 10.1002/chem.201605738] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Indexed: 12/20/2022]
Abstract
A ring-opening metathesis polymerization catalyst supported by a redox-active N-heterocyclic carbene was synthesized and found to undergo reversible reduction. In its neutral form, the catalyst polymerized 1,5-cis,cis-cyclooctadiene at a higher rate than that of a norbornene derivative; however, upon reduction, the selectivity was found to reverse. Utilizing this oxidation state dependent selectivity, a series of copolymers with controlled compositions, microstructures, and physical properties were prepared by redox-switching the catalyst over the course of a series of polymerization reactions.
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Affiliation(s)
- Dominika N Lastovickova
- Department of Chemistry, The University of Texas at Austin, 1 University Station, A1590, Austin, TX, 78712, USA
- Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS), Ulsan, 44919, Republic of Korea
| | - Huiling Shao
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA, 15260, USA
| | - Gang Lu
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA, 15260, USA
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA, 15260, USA
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, 3700 O'Hara Street, Pittsburgh, PA, 15261, USA
| | - Christopher W Bielawski
- Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS), Ulsan, 44919, Republic of Korea
- Department of Chemistry and Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
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57
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Lowe MY, Shu S, Quan SM, Diaconescu PL. Investigation of redox switchable titanium and zirconium catalysts for the ring opening polymerization of cyclic esters and epoxides. Inorg Chem Front 2017. [DOI: 10.1039/c7qi00227k] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and characterization of (thiolfan*)Zr(OtBu)2 (thiolfan* = 1,1′-di(2,4-di-tert-butyl-6-thiophenoxide)ferrocene) is reported, as well as its activity toward the ring-opening polymerizations of l-lactide and ε-caprolactone.
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Affiliation(s)
- Miranda Y. Lowe
- Department of Chemistry and Biochemistry
- University of California
- Los Angeles
- Los Angeles
- USA
| | - Sisheng Shu
- Department of Chemistry and Biochemistry
- University of California
- Los Angeles
- Los Angeles
- USA
| | - Stephanie M. Quan
- Department of Chemistry and Biochemistry
- University of California
- Los Angeles
- Los Angeles
- USA
| | - Paula L. Diaconescu
- Department of Chemistry and Biochemistry
- University of California
- Los Angeles
- Los Angeles
- USA
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58
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Helmdach K, Dörk S, Villinger A, Seidel WW. Sterically encumbered metalla-diphosphines: unlocking alkyne rotation by PtII coordination. Dalton Trans 2017. [DOI: 10.1039/c7dt01803g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Chelate coordination of a redoxactive metalla-diphosphine at PtCl2 changes the electronic structure at the alkyne complex moiety significantly, which is reflected in the onset of rotational isomerism.
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Affiliation(s)
- Kai Helmdach
- Institut für Chemie
- Universität Rostock
- 18059 Rostock
- Germany
| | - Stephan Dörk
- Institut für Chemie
- Universität Rostock
- 18059 Rostock
- Germany
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59
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Lastovickova DN, Teator AJ, Shao H, Liu P, Bielawski CW. A redox-switchable ring-closing metathesis catalyst. Inorg Chem Front 2017. [DOI: 10.1039/c7qi00018a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A ring-closing metathesis catalyst was arrested upon reduction of a redox-active ligand; subsequent oxidation restored catalytic activity.
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Affiliation(s)
| | - Aaron J. Teator
- Department of Chemistry
- The University of Texas at Austin
- 1 University Station
- Austin
- USA
| | - Huiling Shao
- Department of Chemistry
- University of Pittsburgh
- Pittsburgh
- USA
| | - Peng Liu
- Department of Chemistry
- University of Pittsburgh
- Pittsburgh
- USA
| | - Christopher W. Bielawski
- Center for Multidimensional Carbon Materials (CMCM)
- Institute for Basic Science (IBS)
- Ulsan 44919
- Republic of Korea
- Department of Chemistry
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60
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Zou W, Pang W, Chen C. Redox control in palladium catalyzed norbornene and alkyne polymerization. Inorg Chem Front 2017. [DOI: 10.1039/c6qi00562d] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Switchable polymerization of norbornene, 5-norbornene-2-yl acetate and 1-chloro-1-octyne could be realized by using two palladium complexes (NHC)Pd(allyl)Cl (NHC = 1,3-Ar2-naphthoquinimidazolylidene, Ar = 2,6-Me2-C6H3, 2,6-iPr2-C6H3) bearing a redox-active naphthoquinone moiety.
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Affiliation(s)
- Wenping Zou
- CAS Key Laboratory of Soft Matter Chemistry
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
| | - Wenmin Pang
- CAS Key Laboratory of Soft Matter Chemistry
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
| | - Changle Chen
- CAS Key Laboratory of Soft Matter Chemistry
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
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61
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Chile LE, Ebrahimi T, Wong A, Aluthge DC, Hatzikiriakos SG, Mehrkhodavandi P. Impact of aryloxy initiators on the living and immortal polymerization of lactide. Dalton Trans 2017; 46:6723-6733. [DOI: 10.1039/c7dt00990a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This report describes two different methodologies for the synthesis of aryl end-functionalized poly(lactide)s (PLAs) catalyzed by indium complexes.
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Affiliation(s)
- L.-E. Chile
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
- Department of Chemical and Biological Engineering
| | - T. Ebrahimi
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
- Department of Chemical and Biological Engineering
| | - A. Wong
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
| | - D. C. Aluthge
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
| | - S. G. Hatzikiriakos
- Department of Chemical and Biological Engineering
- University of British Columbia
- Vancouver
- Canada
| | - P. Mehrkhodavandi
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
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62
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Naumann S, Wang D. Dual Catalysis Based on N-Heterocyclic Olefins for the Copolymerization of Lactones: High Performance and Tunable Selectivity. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b02374] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Stefan Naumann
- Institute of Polymer Chemistry, University of Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Dongren Wang
- Institute of Polymer Chemistry, University of Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
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