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2
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Kumar S, Dholakiya BZ, Jangir R. Role of organometallic complexes in olefin polymerization: a review report. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.122066] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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3
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Park CY, Switzer JM, Speer J, Medvedev GA, Caruthers JM, Abu-Omar MM. Kinetics of Ethylene/1-Hexene Copolymerization over a Single-Site Hafnium Bis(phenolate) Catalyst: Insights into Insertion Complexity and Deactivation Pathways. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00230] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Jeffrey M. Switzer
- Charles D. Davidson School of Chemical Engineering, Forney Hall of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | | | - Grigori A. Medvedev
- Charles D. Davidson School of Chemical Engineering, Forney Hall of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - James M. Caruthers
- Charles D. Davidson School of Chemical Engineering, Forney Hall of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
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4
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Hanifpour A, Bahri‐Laleh N, Nekoomanesh‐Haghighi M, Poater A. 1‐Decene oligomerization by new complexes bearing diamine‐diphenolates ligands: Effect of ligand structure. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6227] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Ahad Hanifpour
- Polymerization Engineering Department Iran Polymer and Petrochemical Institute (IPPI) Tehran Iran
| | - Naeimeh Bahri‐Laleh
- Polymerization Engineering Department Iran Polymer and Petrochemical Institute (IPPI) Tehran Iran
| | | | - Albert Poater
- Institut de Química Computacional i Catàlisi, Departament de Química Universitat de Girona c/M. Aurèlia Capmany 69 Girona Catalonia E‐17003 Spain
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5
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Group IV diamine bis(phenolate) catalysts for 1-decene oligomerization. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.111047] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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6
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Siu TC, Silva I, Lunn MJ, John A. Influence of the pendant arm in deoxydehydration catalyzed by dioxomolybdenum complexes supported by amine bisphenolate ligands. NEW J CHEM 2020. [DOI: 10.1039/d0nj02151b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Molybdenum complexes devoid of a strongly coordinating pendant arm result in enhanced catalytic activity.
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Affiliation(s)
- Timothy C. Siu
- Chemistry and Biochemistry Department
- California State Polytechnic University
- Pomona
- USA
| | - Israel Silva
- Chemistry and Biochemistry Department
- California State Polytechnic University
- Pomona
- USA
| | - Maiko J. Lunn
- Chemistry and Biochemistry Department
- California State Polytechnic University
- Pomona
- USA
| | - Alex John
- Chemistry and Biochemistry Department
- California State Polytechnic University
- Pomona
- USA
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High Performance Size Exclusion Chromatography-Inductively Coupled Plasma-Mass Spectrometry to Study the Copper and Cadmium Complexation with Humic Acids. Molecules 2019; 24:molecules24173201. [PMID: 31484411 PMCID: PMC6749506 DOI: 10.3390/molecules24173201] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 08/30/2019] [Accepted: 09/01/2019] [Indexed: 11/16/2022] Open
Abstract
Dissolved organic matter (DOM) plays an important role in the environment by influencing the transport and distribution of organic and inorganic components through different processes: the retention, mobilization, and bio-availability of potentially toxic elements (PTEs). The aim of the present study is to examine the dimensional characterization of humic acids (HA) extracted from soil matrix, as well as to analyze the metal distribution among different ligand classes. The molecular size distribution of the HA extract from soil showed three dimensional classes: 52 KDa, 4.5 KDa, and 900 Da. HPSEC-ICP-MS measurements demonstrated that the dimensional classes, relative to first two fractions, bind the largest part of metals. The complexing capacity of HA was evaluated to assess the pollutants mobility in the environmental system. In particular, cadmium (Cd) and copper (Cu) complexation was investigated due to the great concern regarding their bio-availability and toxicity in natural waters. The complexing capacity of HA solution (20 mg/L) was measured by titration using a high-performance size exclusion chromatography (HP-SEC) coupled to an inductively coupled mass spectrometry (ICP-MS). Results obtained by this technique are compared with those obtained by anodic stripping voltammetry (ASV) to investigate the effects of kinetic lability of complexes on measurements carried by HPSEC-ICP-MS. In this study, results of ligand concentrations and stability constants obtained via the two techniques are assessed considering the detection window associated to the applied analytical methodology. Results obtained using the two analytical techniques showed that Cd is complexed by two classes of ligands. However, the ligand concentration values obtained using the two techniques are different, because the detection window associated to the two methodologies; the complexing capacity, which was obtained as sum of the two classes of ligands, were 33 nmol/L and 9 nmol/L for ASV and HPSEC-ICP-MS, respectively. The copper complexing capacities determined by the two methodologies are comparable: 166 and 139 nmol/L for ASV and HPSEC-ICP-MS, respectively. However, the results of Cu titration differ for the two techniques, highlighting only one class of ligands when ASV was used, and two classes when HPSEC-ICP-MS was employed. Differences on results obtained by the two techniques are explained considering the kinetic lability of complexes; the results show that, differently from previous studies, also Cu complexes can be kinetically labile, if one technique with high reaction time is used, as well some cadmium complexes are sufficient stable to be determined by HPSEC-ICP-MS.
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Quantification of active sites in single-site group 4 metal olefin polymerization catalysis. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.01.025] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Straightforward Design for Phenoxy-Imine Catalytic Activity in Ethylene Polymerization: Theoretical Prediction. Catalysts 2018. [DOI: 10.3390/catal8100422] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The quantitative structure-activity relationship (QSAR) of 18 Ti-phenoxy-imine (FI-Ti)-based catalysts was investigated to clarify the role of the structural properties of the catalysts in polyethylene polymerization activity. The electronic properties of the FI-Ti catalysts were analyzed based on density functional theory with the M06L/6-31G** and LANL2DZ basis functions. The analysis results of the QSAR equation with a genetic algorithm showed that the polyethylene catalytic activity mainly depended on the highest occupied molecular orbital energy level and the total charge of the substituent group on phenylimine ring. The QSAR models showed good predictive ability (R2) and R2 cross validation (R2cv) values of greater than 0.927. The design concept is “head-hat”, where the hats are the phenoxy-imine substituents, and the heads are the transition metals. Thus, for the newly designed series, the phenoxy-imine substituents still remained, while the Ti metal was replaced by Zr or Ni transition metals, entitled FI-Zr and FI-Ni, respectively. Consequently, their polyethylene polymerization activities were predicted based on the obtained QSAR of the FI-Ti models, and it is noteworthy that the FI-Ni metallocene catalysts tend to increase the polyethylene catalytic activity more than that of FI-Zr complexes. Therefore, the new designs of the FI-Ni series are proposed as candidate catalysts for polyethylene polymerization, with their predicted activities in the range of 35,000–48,000 kg(PE)/mol(Cat.)·MPa·h. This combined density functional theory and QSAR analysis is useful and straightforward for molecular design or catalyst screening, especially in industrial research.
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Switzer JM, Pletcher PD, Steelman DK, Kim J, Medvedev GA, Abu-Omar MM, Caruthers JM, Delgass WN. Quantitative Modeling of the Temperature Dependence of the Kinetic Parameters for Zirconium Amine Bis(Phenolate) Catalysts for 1-Hexene Polymerization. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01989] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jeffrey M. Switzer
- Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Paul D. Pletcher
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - D. Keith Steelman
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Jungsuk Kim
- Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Grigori A. Medvedev
- Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Mahdi M. Abu-Omar
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - James M. Caruthers
- Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - W. Nicholas Delgass
- Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
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Gunasekara T, Kim J, Preston A, Steelman DK, Medvedev GA, Delgass WN, Sydora OL, Caruthers JM, Abu-Omar MM. Mechanistic Insights into Chromium-Catalyzed Ethylene Trimerization. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00468] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thilina Gunasekara
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
| | - Jungsuk Kim
- Charles D. Davidson School of Chemical Engineering, Purdue University, Forney Hall of Chemical
Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Andrew Preston
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
| | - D. Keith Steelman
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Grigori A. Medvedev
- Charles D. Davidson School of Chemical Engineering, Purdue University, Forney Hall of Chemical
Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - W. Nicholas Delgass
- Charles D. Davidson School of Chemical Engineering, Purdue University, Forney Hall of Chemical
Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Orson L. Sydora
- Research and Technology, Chevron Phillips Chemical LP, 1862 Kingwood Drive, Kingwood, Texas 77339, United States
| | - James M. Caruthers
- Charles D. Davidson School of Chemical Engineering, Purdue University, Forney Hall of Chemical
Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Mahdi M. Abu-Omar
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106-9510, United States
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Gunasekara T, Kim J, Xiong S, Preston A, Steelman DK, Medvedev GA, Delgass WN, Caruthers JM, Abu-Omar MM. Interaction between Two Active Sites of the Same Catalyst for Macromonomer Enchained Olefin Polymerization. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01341] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Thilina Gunasekara
- Brown
Laboratory, Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
- Department
of Chemistry and Biochemistry, Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106-9510, United States
| | - Jungsuk Kim
- Charles D. Davidson School of Chemical Engineering,
Forney
Hall of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Silei Xiong
- Charles D. Davidson School of Chemical Engineering,
Forney
Hall of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Andrew Preston
- Brown
Laboratory, Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
- Department
of Chemistry and Biochemistry, Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106-9510, United States
| | - D. Keith Steelman
- Brown
Laboratory, Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Grigori A. Medvedev
- Charles D. Davidson School of Chemical Engineering,
Forney
Hall of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - W. Nicholas Delgass
- Charles D. Davidson School of Chemical Engineering,
Forney
Hall of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - James M. Caruthers
- Charles D. Davidson School of Chemical Engineering,
Forney
Hall of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Mahdi M. Abu-Omar
- Department
of Chemistry and Biochemistry, Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106-9510, United States
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Lee YK, Hur J. Using two-dimensional correlation size exclusion chromatography (2D-CoSEC) to explore the size-dependent heterogeneity of humic substances for copper binding. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 227:490-497. [PMID: 28494401 DOI: 10.1016/j.envpol.2017.04.099] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 04/13/2017] [Accepted: 04/13/2017] [Indexed: 06/07/2023]
Abstract
Knowledge of the heterogeneous distribution of humic substances (HS) reactivities along a continuum of molecular weight (MW) is crucial for the systems where the HS MW is subject to change. In this study, two dimensional correlation spectroscopy combined with size exclusion chromatography (2D-CoSEC) was first utilized to obtain a continuous and heterogeneous presence of copper binding characteristics within bulk HS with respect to MW. HS solutions with varying copper concentrations were directly injected into a size exclusion chromatography (SEC) system with Tris-HCl buffer as a mobile phase. Several validation tests confirmed neither structural disruption of HS nor competition effect of the mobile phase used. Similar to batch systems, fluorescence quenching was observed in the chromatograms over a wide range of HS MW. 2D-CoSEC maps of a soil-derived HS (Elliot soil humic acid) showed the greater fluorescence quenching degrees with respect to the apparent MW on the order of 12500 Da > 10600 Da > 7000 Da > 15800 Da. The binding constants calculated based on modified Stern-Volmer equation were consistent with the 2D-CoSEC results. More heterogeneity of copper binding affinities within bulk HS was found for the soil-derived HS versus an aquatic HS. The traditional fluorescence quenching titration method using ultrafiltered HS size fractions failed to delineate detailed distribution of the copper binding characteristics, exhibiting a much shorter range of the binding constants than those obtained from the 2D-CoSEC. Our proposed technique demonstrated a great potential to describe metal binding characteristics of HS at high MW resolution, providing a clear picture of the size-dependent metal-HS interactions.
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Affiliation(s)
- Yun-Kyung Lee
- Department of Environment and Energy, Sejong University, Seoul 05006, South Korea
| | - Jin Hur
- Department of Environment and Energy, Sejong University, Seoul 05006, South Korea.
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Gunasekara T, Preston AZ, Zeng M, Abu-Omar MM. Highly Regioselective α-Olefin Dimerization Using Zirconium and Hafnium Amine Bis(phenolate) Complexes. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00359] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Thilina Gunasekara
- Brown
Laboratory, Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
- Department
of Chemistry and Biochemistry, University of California, Santa
Barbara, California 93106, United States
| | - Andrew Z. Preston
- Brown
Laboratory, Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
- Department
of Chemistry and Biochemistry, University of California, Santa
Barbara, California 93106, United States
| | - Manhao Zeng
- Department
of Chemistry and Biochemistry, University of California, Santa
Barbara, California 93106, United States
| | - Mahdi M. Abu-Omar
- Department
of Chemistry and Biochemistry, University of California, Santa
Barbara, California 93106, United States
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16
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Preston AZ, Kim J, Medvedev GA, Delgass WN, Caruthers JM, Abu-Omar MM. Steric and Solvation Effects on Polymerization Kinetics, Dormancy, and Tacticity of Zr-Salan Catalysts. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00295] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andrew Z. Preston
- Brown
Laboratory, Department of Chemistry, Purdue University, 560 Oval
Drive, West Lafayette, Indiana 47907, United States
| | - Jungsuk Kim
- Charles
D. Davidson School of Chemical Engineering, Purdue University, Forney Hall of Chemical
Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Grigori A. Medvedev
- Charles
D. Davidson School of Chemical Engineering, Purdue University, Forney Hall of Chemical
Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - W. Nicholas Delgass
- Charles
D. Davidson School of Chemical Engineering, Purdue University, Forney Hall of Chemical
Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - James M. Caruthers
- Charles
D. Davidson School of Chemical Engineering, Purdue University, Forney Hall of Chemical
Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Mahdi M. Abu-Omar
- Department
of Chemistry and Biochemistry, Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
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Sampson J, Choi G, Akhtar MN, Jaseer EA, Theravalappil R, Al-Muallem HA, Agapie T. Olefin Polymerization by Dinuclear Zirconium Catalysts Based on Rigid Teraryl Frameworks: Effects on Tacticity and Copolymerization Behavior. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00015] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jessica Sampson
- Division
of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Gyeongshin Choi
- Division
of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | | | | | | | | | - Theodor Agapie
- Division
of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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Pletcher PD, Switzer JM, Steelman DK, Medvedev GA, Delgass WN, Caruthers JM, Abu-Omar MM. Quantitative Comparative Kinetics of 1-Hexene Polymerization across Group IV Bis-Phenolate Catalysts. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00974] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Paul D. Pletcher
- Brown
Laboratory, Department of Chemistry, Purdue University, 560 Oval
Drive, West Lafayette, Indiana 47907, United States
| | - Jeffrey M. Switzer
- Forney
Hall of Chemical Engineering, School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - D. Keith Steelman
- Brown
Laboratory, Department of Chemistry, Purdue University, 560 Oval
Drive, West Lafayette, Indiana 47907, United States
| | - Grigori A. Medvedev
- Forney
Hall of Chemical Engineering, School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - W. Nicholas Delgass
- Forney
Hall of Chemical Engineering, School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - James M. Caruthers
- Forney
Hall of Chemical Engineering, School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Mahdi M. Abu-Omar
- Brown
Laboratory, Department of Chemistry, Purdue University, 560 Oval
Drive, West Lafayette, Indiana 47907, United States
- Forney
Hall of Chemical Engineering, School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
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Ji X, Yao W, Luo X, Gao W, Mu Y. Synthesis of Ti, Zr, and Hf complexes with a new tetra-azane ligand by one-pot HCl-elimination and their properties as catalysts for production of UHMWPE. NEW J CHEM 2016. [DOI: 10.1039/c5nj02151k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first example for the HCl-elimination reaction being applied in the attachment of an amido-containing ligand to Zr and Hf.
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Affiliation(s)
- Xiangdong Ji
- State Key Laboratory of Supramolecular Structure and Materials
- School of Chemistry
- Jilin University
- Changchun 130012
- People's Republic of China
| | - Wei Yao
- State Key Laboratory of Supramolecular Structure and Materials
- School of Chemistry
- Jilin University
- Changchun 130012
- People's Republic of China
| | - Xuyang Luo
- State Key Laboratory of Supramolecular Structure and Materials
- School of Chemistry
- Jilin University
- Changchun 130012
- People's Republic of China
| | - Wei Gao
- State Key Laboratory of Supramolecular Structure and Materials
- School of Chemistry
- Jilin University
- Changchun 130012
- People's Republic of China
| | - Ying Mu
- State Key Laboratory of Supramolecular Structure and Materials
- School of Chemistry
- Jilin University
- Changchun 130012
- People's Republic of China
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20
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Ji X, Luo X, Gao W, Mu Y. Zirconium and hafnium complexes with new tetra-azane ligands: Synthesis, characterization and catalytic properties for ethylene polymerization. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.10.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Despagnet-Ayoub E, Takase MK, Henling LM, Labinger JA, Bercaw JE. Mechanistic Insights on the Controlled Switch from Oligomerization to Polymerization of 1-Hexene Catalyzed by an NHC-Zirconium Complex. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00472] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Emmanuelle Despagnet-Ayoub
- CNRS, LCC (Laboratoire
de Chimie de Coordination), 205 route de Narbonne, 31077 Toulouse Cedex 4, France
- Université de Toulouse, UPS, INPT, LCC, 31077 Toulouse
Cedex 4, France
| | - Michael K. Takase
- Arnold
and Mabel Beckman Laboratories of Chemical Synthesis, California Institute of Technology, Pasadena, California 91125, United States
| | - Lawrence M. Henling
- Arnold
and Mabel Beckman Laboratories of Chemical Synthesis, California Institute of Technology, Pasadena, California 91125, United States
| | - Jay A. Labinger
- Arnold
and Mabel Beckman Laboratories of Chemical Synthesis, California Institute of Technology, Pasadena, California 91125, United States
| | - John E. Bercaw
- Arnold
and Mabel Beckman Laboratories of Chemical Synthesis, California Institute of Technology, Pasadena, California 91125, United States
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22
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Synthesis and structural characterization of amine-bridged bis(phenolate) lanthanide complexes. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.04.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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23
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Hwang EY, Park GH, Lee CS, Kang YY, Lee J, Lee BY. Preparation of octahydro- and tetrahydro-[1,10]phenanthroline zirconium and hafnium complexes for olefin polymerization. Dalton Trans 2015; 44:3845-55. [PMID: 25611680 DOI: 10.1039/c4dt03683b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Post-metallocenes were constructed for olefin polymerization using 1,2,3,4,7,8,9,10-octahydro[1,10]phenanthroline and 1,2,3,4-tetrahydro[1,10]phenanthroline derivatives. A series of zirconium complexes - LZrCl2(NHMe2)2 [L = 2,9-H2-C12H12N2 (4), 2,9-Me2-C12H12N2 (5), 2,9-nBu2-C12H12N2 (6), and 2,9-iPr2-C12H12N2 (7)] - and hafnium complexes - LHfCl2(NHMe2)2 [L = 2,9-H2-C12H12N2 (8), 2,9-Me2-C12H12N2 (9), 2,9-nBu2-C12H12N2 (10), and 2,9-iPr2-C12H12N2 (11)] - were synthesized via the reaction of octahydro[1,10]phenanthrolines (2,9-R2-C12H12(NH)2) with (Me2N)2MCl2 (DME). The reaction of 2,9-R2-C12H12(NH)2 with (PhCH2)2ZrCl2 in the presence of a small amount of THF afforded a series of THF adduct analogs, i.e., LZrCl2(THF)2 [L = 2,9-H2-C12H12N2 (12), 2,9-Me2-C12H12N2 (13), 2,9-nBu2-C12H12N2 (14), and 2,9-iPr2-C12H12N2 (15)]. The treatment of 12 and 13 with excess Me3Al resulted in the formation of unexpected complexes, i.e., (η(4)-LAlMe2)ZrCl2(Me) [L = 2,9-H2-C12H12N2 (16) and 2,9-Me2-C12H12N2 (17)], in which the Me2Al unit forms a five-membered ring through binding with the two nitrogen donors and the MeCl2Zr unit slips to an η(4)-binding mode containing the N-C-C-N fragment. The treatment of tetrahydro[1,10]phenanthrolines [2,9-R2-C12NH9(NH)] with M(CH2Ph)4 afforded tribenzyl zirconium complexes LZr(CH2Ph)3 - [L = 2,9-Me2-C12NH9N (18) and 2,9-nBu2-C12NH9N (19)] - and hafnium complexes - LHf(CH2Ph)3 [L = 2,9-Me2-C12NH9N (20), 2,9-nBu2-C12NH9N (21), and 2,9-iPr2-C12NH9N (22)]. The structures of 4, 5, 12, 17, and 22 were elucidated by X-ray crystallography. The newly prepared complexes were screened for ethylene/1-octene copolymerization activity: 12 and 16 were potent catalysts (activities of 74 × 10(6) g mol-Zr h(-1) at ∼120 °C under 30 bar ethylene) for the production of wax-like low-molecular weight polyethylene (Mn: ∼5000), which is widely used in industry.
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Affiliation(s)
- Eun Yeong Hwang
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, South Korea
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Steelman DK, Xiong S, Medvedev GA, Delgass WN, Caruthers JM, Abu-Omar MM. Effects of Electronic Perturbations on 1-Hexene Polymerization Catalyzed by Zirconium Amine Bisphenolate Complexes. ACS Catal 2014. [DOI: 10.1021/cs5003788] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- D. Keith Steelman
- Brown
Laboratory and the Negishi Brown Institute for Catalysis (NBIC), Department
of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Silei Xiong
- School
of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Grigori A. Medvedev
- School
of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - W. Nicholas Delgass
- School
of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - James M. Caruthers
- School
of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Mahdi M. Abu-Omar
- Brown
Laboratory and the Negishi Brown Institute for Catalysis (NBIC), Department
of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
- School
of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
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25
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Park JH, Jang YE, Jeon JY, Go MJ, Lee J, Kim SK, Lee SI, Lee BY. Preparation of ansa-metallocenes for production of poly(α-olefin) lubricants. Dalton Trans 2014; 43:10132-8. [PMID: 24875269 DOI: 10.1039/c4dt00997e] [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
An ansa-zirconocene bearing methyl substituents at all positions adjacent to the bridgehead [(-C(Ph)HC(Ph)H-)(η(5)-2,5-Me2C5H2)2ZrCl2] (4) was prepared in high yields (78%) through the reductive dimerization of 1,4-dimethyl-6-phenylfulvene utilizing ZrCl2·DME generated in situ. The structure of 4 was subsequently confirmed using X-ray crystallography. 4 exhibited excellent catalytic performance with regard to 1-decene oligomerization, which was carried out with the intention of preparing lubricant base stocks. High activities (21 × 10(6) g mol(-1) Zr h(-1) activity; TON = 150 000; TOF = 42 s(-1)) were observed at temperatures as high as 120 °C and the oligomer distribution was appropriate for lubricant application. The simulated distillation (SIMDIS) data confirmed that a wide range of oligomers were formed, ranging from the dimer (2-mer) to 20-mer. A minimal amount of the dimer and oligomers larger than the 10-mer was formed (13 and 25 wt%, respectively). Alternatively, a typical unbridged complex such as (η(5)-nBuC5H4)2ZrCl2 primarily produced dimers (54 wt%), whereas the ansa-zirconocene (EBI)ZrCl2 primarily produced oligomers larger than 10-mer (62 wt%). The methyl substituents at the positions adjacent to the bridgehead in 4 played a significant role in the catalytic performance.
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Affiliation(s)
- Ji Hae Park
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, South Korea.
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Brown HA, Xiong S, Medvedev GA, Chang YA, Abu-Omar MM, Caruthers JM, Waymouth RM. Zwitterionic Ring-Opening Polymerization: Models for Kinetics of Cyclic Poly(caprolactone) Synthesis. Macromolecules 2014. [DOI: 10.1021/ma500395j] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Hayley A. Brown
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Silei Xiong
- Forney
Hall of Chemical Engineering, School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Grigori A. Medvedev
- Forney
Hall of Chemical Engineering, School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Young A. Chang
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Mahdi M. Abu-Omar
- Forney
Hall of Chemical Engineering, School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
- Brown
Laboratory, Department of Chemistry, Purdue University, 560 Oval
Drive, West Lafayette, Indiana 47907, United States
| | - James M. Caruthers
- Forney
Hall of Chemical Engineering, School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Robert M. Waymouth
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
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27
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Xiong S, Steelman DK, Medvedev GA, Delgass WN, Abu-Omar MM, Caruthers JM. Selective Degenerative Benzyl Group Transfer in Olefin Polymerization. ACS Catal 2014. [DOI: 10.1021/cs500021g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Silei Xiong
- School
of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - D. Keith Steelman
- Brown
Laboratory and the Negishi Brown Institute, Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Grigori A. Medvedev
- School
of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - W. Nicholas Delgass
- School
of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Mahdi M. Abu-Omar
- School
of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
- Brown
Laboratory and the Negishi Brown Institute, Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - James M. Caruthers
- School
of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
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Sun Q, Wang Y, Yuan D, Yao Y, Shen Q. Synthesis of Group 4 Metal Complexes Stabilized by an Amine-Bridged Bis(phenolato) Ligand and Their Catalytic Behavior in Intermolecular Hydroamination Reactions. Organometallics 2014. [DOI: 10.1021/om401158a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Qiu Sun
- Key Laboratory of Organic Synthesis of Jiangsu
Province, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, Dushu Lake Campus, 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, Soochow University, Dushu Lake Campus, 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, Soochow University, Dushu Lake Campus, Suzhou 215123, People’s Republic of China
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu
Province, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, Dushu Lake Campus, Suzhou 215123, People’s Republic of China
- The Institute of Low Carbon Economy, Suzhou 215123, People’s Republic of China
| | - Qi Shen
- Key Laboratory of Organic Synthesis of Jiangsu
Province, College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, Dushu Lake Campus, Suzhou 215123, People’s Republic of China
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29
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Steelman DK, Pletcher PD, Switzer JM, Xiong S, Medvedev GA, Delgass WN, Caruthers JM, Abu-Omar MM. Comparison of Selected Zirconium and Hafnium Amine Bis(phenolate) Catalysts for 1-Hexene Polymerization. Organometallics 2013. [DOI: 10.1021/om4006005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- D. Keith Steelman
- Brown Laboratory, Department
of Chemistry, Purdue University, 560 Oval
Drive, West Lafayette, Indiana 47907, United States
| | - Paul D. Pletcher
- Brown Laboratory, Department
of Chemistry, Purdue University, 560 Oval
Drive, West Lafayette, Indiana 47907, United States
| | - Jeffrey M. Switzer
- School of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering,
480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Silei Xiong
- School of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering,
480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Grigori A. Medvedev
- School of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering,
480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - W. Nicholas Delgass
- School of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering,
480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - James M. Caruthers
- School of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering,
480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Mahdi M. Abu-Omar
- Brown Laboratory, Department
of Chemistry, Purdue University, 560 Oval
Drive, West Lafayette, Indiana 47907, United States
- School of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering,
480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
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