Publications List (69 refereed papers + 21 patent applications)

Independent Research Publications

1. Chen, E. Y.-X.* "Coordination Polymerization of Polar Vinyl Monomers by Single-Site Metal Catalysts", Chem. Rev. 2009, 109, in press (invited contribution to the thematic issue on Polymer Synthesis).
2. Chen, E. Y.-X.* "Transformation of Polymerization of Polar Vinyl Monomers by Discrete and Hybrid Metal Catalysts", Dalton Trans. 2009, in press (invited Perspective to the themed issue on Metal-Catalysed Polymerisation).
3. Escudé N. C.; Chen, E. Y.-X.* "Stereoregular Methacrylate-POSS Hybrid Polymers: Syntheses and Nanostructured Assemblies", 2009, in review.
4. Miyake, G. M.; Caporaso, L.; Cavallo, L.;* Chen, E. Y.-X.* "Coordination-Addition Polymerization and Kinetic Resolution of Methacrylamides by Chiral Metallocene Catalysts", Macromolecules 2009, 42, 1462-1471.
5. Chen, E. Y.-X.* "Ion-Paring Polymerization", Comments Inorg. Chem. 2009, 30, 7-27 (invited contribution).
6. Ning, Y.; Zhang, Y.; Rodriguez-Delgado, A.; and Chen, E. Y.-X.* "Neutral Metallocene Ester Enolate and Non-Metallocene Alkoxy Complexes of Zirconium for Catalytic Ring-Opening Polymerization of Cyclic Esters", Organometallics 2008, 27, 5632-5640.
7. Ning, Y.; Caporaso, L.; Correa, A.; Gustafson, L. O.; Cavallo, L.;* and Chen, E. Y.-X.* "Syndioselective MMA Polymerization by Group 4 Constrained Geometry Catalysts: A Combined Experimental and Theoretical Study", Macromolecules 2008, 41, 6910-6919.
8. Zhang, Y.; Chen, E. Y.-X.* "Structure-Reactivity Relationships in Bimolecular-Activated Monomer Polymerization of (Meth)acrylates Using Oxidatively Activated Group 14 Ketene Acetals", Macromolecules 2008, 41, in 6353-6360

9. Miyake, G. M.; Chen, E. Y.-X.* "Metallocene-Mediated Asymmetric Coordination Polymerization of Polar Vinyl Monomers to Optically Active, Stereoregular Polymers", Macromolecules 2008, 41, 3405-3416.
10. Ning, Y.; Chen, E. Y.X.* "Metallocene-Catalyzed Polymerization of Methacrylates to Highly Syndiotactic Polymers at High Temperatures," J. Am. Chem. Soc. 2008, 130, 2463-2465.
11. Zhang, Y.; Chen, E. Y.-X.* "Controlled Polymerization of Methacrylates to High Molecular Weight Polymers Using Oxidatively Activated Group Transfer Polymerization Initiators", Macromolecules 2008, 41, 36-42.
12. Zhu, H.; Chen, E. Y.-X.* "Group 13 and Lanthanide Complexes Supported by Tridentate Tripodal Triamine Ligands: Structural Diversity and Polymerization Catalysis," Organometallics 2007, 26, 5395-5405.
13. Ning, Y.; Zhu, H.; Chen, E. Y.-X.* "Remarkable Lewis Acid Effects on Polymerization of Functionalized Alkenes by Metallocene and Lithium Ester Enolates", J. Organomet. Chem. 2007, 692, 4535-4544 (invited contribution to the special issue in honor of G. Erker).
14. Miyake, G. M.; Mariott, W. R.; Chen, E. Y.-X.* "Asymmetric Coordination Polymerization of Acrylamides by Enantiomeric Metallocenium Ester Enolate Catalysts", J. Am. Chem. Soc. 2007, 129, 6724-6725.
15. Mariott, W. R.; Escudé, N. C.; Chen, E. Y.-X.* "Stereoregular P(MMA)-Clay Nanocomposites by Metallocene Catalysts: In Situ Synthesis and Stereocomplex Formation", J. Polym. Sci. Part A: Polym. Chem. 2007, 45, 2581-2592 (a cover page article).
16. Zhu, H.; Chen, E. Y.-X.* "Tripodal Amido Boron and Aluminum Complexes", Inorg. Chem. 2007, 46, 1481-1487.
17. Chen, E. Y.-X.; Rodriguez-Delgado, A. "Complexes of Zirconium and Hafnium in the Oxidation State IV" in Comprehensive Organometallic Chemistry III; Bochmann, M. Vol. Ed.; Mingos, M. P.; Crabtree, R. H. Chief Eds.; Elsevier: Oxford, 2006; Vol. 4, pp 759-1004, 2006 (an invited contribution).
18. Garner, L. E.; Zhu, H.; Hlavinka, M. L.; Hagadorn, J. R.; Chen, E. Y.-X.* "Cationic Zinc Enolates as Highly Active Catalysts for Acrylate Polymerization", J. Am. Chem. Soc. 2006, 128, 14822-14823.
19. Ning, Y.; Chen, E. Y.-X.* "Diastereospecific Ion-Pairing Polymerization of Functionalized Alkenes by Metallocene/Lewis Acid Hybrid Catalysts", Macromolecules 2006, 39, 7204-7215.
20. Mariott, W. R.; Gustafson, L. O.; Chen, E. Y.-X.* "Activation of Tantalocene(V) Alkyl and Alkylidene Complexes with Strong Organo-Lewis Acids and Application to Polymerization Catalysis", Organometallics 2006, 25, 3721-3729.
21. Rodriguez-Delgado, A.; Mariott, W. R.; Chen, E. Y.-X.* "Synthesis and MMA Polymerization of Chiral ansa-Zirconocene Ester Enolate Complexes with C2- and Cs-Ligation", J. Organomet. Chem. 2006, 691, 3490-3497.
22. Mariott, W. R.; Rodriguez-Delgado, A.; Chen, E. Y.-X.* "Chain Termination and Transfer Reactions in the Acrylate Polymerization by a Monometallic Chiral Zirconocenium Catalyst System", Macromolecules 2006, 39, 1318-1327.
23. Mariott, W. R.; Chen, E. Y.-X.* "Mechanism and Scope of Stereospecific Polymerization of Acrylamides by Chiral Zirconocenium Ester and Amide Enolates", Macromolecules 2005, 38, 6822-6832.
24. Ning, Y.; Cooney, M. J.; Chen, E. Y.-X.* "Polymerization of MMA by Oscillating Zirconocene Catalysts, Diastereomeric Zirconocene Mixtures, and Diastereospecific Metallocene Pairs", J. Organomet. Chem. 2005, 690, 6263-6270 (an invited contribution).
25. Rodriguez-Delgado, A.; Chen, E. Y.-X.* "Mechanistic Studies of Stereospecific Polymerization of Methacrylates Using a Cationic, Chiral ansa-Zirconocene Ester Enolate", Macromolecules 2005, 38, 2587-2594.
26. Rodriguez-Delgado, A.; Chen, E. Y.-X.* "Single-Site Anionic Polymerization. Monomeric Ester Enolaluminate Propagator Synthesis, Molecular Structure, and Polymerization Mechanism", J. Am. Chem. Soc. 2005, 127, 961-974.
27. Rodriguez-Delgado, A.; Chen, E. Y.-X.* "Ligand Exchange and Abstraction Reactions Involving Titanium Isopropoxide with Tris(pentafluorophenyl)borane and -alane: Ramifications for Ring-Opening Polymerization of Propylene Oxide", Inorg. Chimi. Acta 2004, 357, 3911-3919 (an invited contribution to the special issue in honor of T. J. Marks).
28. Mariott, W. R.; Chen, E. Y.-X.* "Stereospecific, Coordination Polymerization of Acrylamides by Chiral ansa-Metallocenium Alkyl and Ester Enolate Cations", Macromolecules 2004, 37, 4741-4743.
29. Chen, E. Y.-X. "Stereospecific Polymerization of Methacrylates by Metallocene and Related Catalysts", J. Polym. Sci. Part A: Polym. Chem. 2004, 42, 3395-3403 (an invited Highlight and cover-page article).
30. Rodriguez-Delgado, A.; Mariott, W. R.; Chen, E. Y.-X.* "Living and Syndioselective Polymerization of Methacrylates by Constrained Geometry Titanium Alkyl and Enolate Complexes", Macromolecules 2004, 37, 3092-3100.
31. Bolig, A. D.; Chen, E. Y.-X.* "Ansa-Zirconocene Ester Enolates: Synthesis, Structure, Reaction with Organo-Lewis Acids, and Application to Polymerization of Methacrylates", J. Am. Chem. Soc. 2004, 126, 4897-4906.
32. Chen, E. Y.-X.,* Campbell, R. E., Jr.; Devore, D. D.*, Green, D. P.; Link, B.; Soto, J.; Wilson, D. R.; Abboud, K. A. "Divalent Ansa-Zirconocenes: Stereoselective Synthesis and High Activity for Propylene Polymerization", J. Am. Chem. Soc. 2004, 126, 42-43.
33. Mariott, W. R. Chen, E. Y.-X.* "Stereochemically Controlled PMMA-Exfoliated Silicate Nanocomposites Using Intergallery-Anchored Metallocenium Cations", J. Am. Chem. Soc. 2003, 125, 15726-15727.
34. Jin, J.; Mariott, W. R.; Chen, E. Y.-X.* "Polymerization of Methyl Methacrylate by Metallocene Imido Complexes and Tris(pentafluorophenyl)alane", J. Polym. Sci. Part A: Polym. Chem. 2003, 41, 3132-3142.
35. Mariott, W. R.; Hayden, L. M.; Chen, E. Y.-X.* "Olefin Copolymerization and Polymerization of Methyl Methacrylate Catalyzed by Tantalum(V)-Based Complexes" in Beyond Metallocenes. Next-Generation Polymerization Catalysts; Patil, A. O.; Hlatky, G. G. Eds.; ACS Symp. Ser. 2003, 857, 101-111 (an invited contribution).
36. Chakraborty, D.; Rodriguez, A.; Chen, E. Y.-X.* "Catalytic Ring-Opening Polymerization of Propylene Oxide by Organoborane and Aluminum Lewis Acids", Macromolecules 2003, 36, 5470-5481.
37. Chen, E. Y.-X.;* Cooney, M. J. "Amphicatalytic Polymerization: Synthesis of Stereomultiblock Poly(methyl methacrylate) with Diastereospecific Ion Pairs", J. Am. Chem. Soc. 2003, 125, 7150-7151.
38. Chakraborty, D.; Chen, E. Y.-X.* "Chiral Amido Aluminum and Zinc Alkyls: A Synthetic, Structural, and Polymerization Study", Organometallics 2003, 22, 769-774.
39. Chakraborty, D.; Chen, E. Y.-X.* "First Isolation and Structural Characterization of Triarylaluminum-Water and -Methanol Complexes", Organometallics 2003, 22, 207-210.
40. Jin, J.; Chen, E. Y.-X.* "Stereoblock Copolymerization of Propylene and Methyl Methacrylate With Single-Site Metallocene Catalysts", Macromol. Chem. Phys. 2002, 203, 2329-2333.
41. Chakraborty, D.; Chen, E. Y.-X.* "Chlorobis(pentafluorophenyl)alane: Synthesis, Crystal Structure, and Polymerization Catalysis", Inorg. Chem. Commun. 2002, 5, 698-701.
42. Bolig, A. D.; Chen, E. Y.-X.* "Isotactic-b-Syndiotactic Stereoblock Poly(methyl methacrylate) by Chiral Metallocene/Lewis Acid Hybrid Catalysts", J. Am. Chem. Soc. 2002, 124, 5612-5613.
43. Jin, J.; Wilson, D. R.; Chen, E. Y.-X.* "Monoalkyl, Chiral-at-Metal 'Constrained Geometry' Complexes as Efficient &alpha-Olefin and Methyl Methacrylate Polymerization Catalysts", Chem. Commun. 2002, 708-709.
44. Chakraborty, D.; Chen, E. Y.-X.* "Neutral, Three-Coordinate, Chelating Diamide Aluminum Complexes: Catalysts/Initiators for Synthesis of Telechelic Oligomers and High Polymers", Organometallics 2002, 21, 1438-1442.
45. Feng, S.; Roof, G. R.; Chen, E. Y.-X.* "Tantalum(V)-Based Metallocene, Half-Metallocene, and Non-Metallocene Complexes as Ethylene-1-Octene Copolymerization and Methyl Methacrylate Polymerization Catalysts", Organometallics 2002, 21, 832-839.
46. Chakraborty, D.; Chen, E. Y.-X.* "Neutral Olefin Polymerization Activators as Highly Active Catalysts for ROP of Heterocyclic Monomers and for Polymerization of Styrene", Macromolecules 2002, 35, 13-15.
47. Jin, J.; Chen, E. Y.-X.* "Chiral ansa-Titanocene Imido Complexes: Novel Synthesis and Effective Initiator for Syndiospecific Polymerization of MMA", Organometallics 2002, 21, 13-15.
48. Abboud, K. A.;* Nickias, P. N.; Chen, E. Y.-X. "A Dimeric Constrained-Geometry Titanium Complex Linked by Double Ti-CH2-Al-CH2 Heterocycles", Acta Cryst. 2002, C58, m41-42.
49. Bolig, A. D.; Chen, E. Y.-X.* "Reversal of Polymerization Stereoregulation in Anionic Polymerization of MMA by Chiral Metallocene and Non-Metallocene Initiators: A New Reaction Pathway for Metallocene-Initiated MMA Polymerization", J. Am. Chem. Soc. 2001, 123, 7943-7944.
50. Chen, E. Y.-X.;* Kruper, W. J.; Roof, G.; Wilson, D. R. "Double Activation of Constrained Geometry and ansa-Metallocene Group 4 Metal Dialkyls: Synthesis, Structure, and Olefin Polymerization Study of Mono- and Dicationic Aluminate Complexes", J. Am. Chem. Soc. 2001, 123, 745-746.
    
    (One-page highlights on this publication were reported in Chemical and Engineering News, 2001, 79(8), 57. This research was also reviewed as one of the three highlights in polymer chemistry for year 2001: Chemical and Engineering News, 2001, 79(50), 54.)
51. Abboud, K. A.;* Nickias, P. N.; Chen, E. Y.-X. "{N-[Dimethyl(η5-2,3,4,6-tetramethyl-indenyl)silyl]Cyclobutylamido-κN}-(η4-1,4-diphenyl-1,3-butadiene) Titanium(II)", Acta Cryst. 2001, C57, 1408-1409.
52. Chen, E. Y.-X.;* Abboud, K. A. 'Unusual Weakly Coordinating Anion Reactivity in Metallocene Chemistry. Formation of Tantalocene Cation-Dinuclear Anion Pairs", Organometallics 2000, 19, 5541-5543.
53. Chen, E. Y.-X.;* Marks, T. J.* "Cocatalyst for Metal-Catalyzed Olefin Polymerization: Activators, Activation Processes, and Structure-Activity Relationships", Chem. Rev. 2000, 100, 1391-1434 (an invited contribution).
54. Klosin, J.;* Roof, G.; Chen, E. Y.-X.;* Abboud, K. A. "Ligand Exchange and Alkyl Abstraction Involving (Perfluoroaryl)boranes and -alanes with Aluminum and Gallium Alkyls", Organometallics 2000, 19, 4684-4686.

Postdoctoral, Graduate and Undergraduate Research Publications

55. Chen, Y.-X.; Metz, M. V.; Li, L.; Stern, C. L.; Marks, T. J.* "Sterically Encumbered (Perfluoroaryl) Borane and Aluminate Cocatalysts for Tuning Cation-Anion Ion Pair Structure and Reactivity in Metallocene Polymerization Processes. A Synthetic, Structural, and Polymerization Study", J. Am. Chem. Soc. 1998, 120, 6287-6305.
56. Chen, Y.-X.; Fu, P.; Stern, C. L.; Marks, T. J.* "A Novel Phenolate Constrained Geometry Catalyst System. Efficient Synthesis, Structural Characterization, and α-Olefin Polymerization Catalysis", Organometallics 1997, 16, 5958-5963.
57. Chen, Y.-X.; Stern, C. L.; Marks, T. J.* "Very Large Counteranion Modulation of Cationic Metallocene Polymerization Activity and Stereoregulation by a Sterically Congested (Perfluoroaryl)fluoroaluminate", J. Am. Chem. Soc. 1997, 119, 2582-2583.
58. Chen, Y.-X.; Marks, T. J.* "Constrained Geometry Dialkyl Catalysts. Highly Efficient Synthesis, C-H Bond Activation Chemistry, Monomer-Dimer Equilibration, and α-Olefin Polymerization Catalysis", Organometallics 1997, 16, 3649-3657.
59. Chen, Y.-X.; Stern, C. L.; Yang, S.; Marks, T. J.* "Organo-Lewis Acids as Cocatalysts in Cationic Metallocene Polymerization Catalysis. Unusual Characteristics of Sterically Encumbered Tris(perfluorobiphenyl)borane", J. Am. Chem. Soc. 1996, 118, 12451-12452.
60. Chen, Y.-X.; Rausch, M. D.;* Chien, J. C. W.* "C2v- and C2-Symmetric ansa-Bis(fluorenyl)Zirconocene Catalysts: Synthesis and α-Olefin Polymerization Catalysis", Macromolecules 1995, 28, 5399-5404.
61. Chen, Y.-X.; Rausch, M. D.;* Chien, J. C. W.* "Heptane-Soluble Homogeneous Zirconocene Catalyst: Synthesis of a Single Diastereomer, Polymerization Catalysis and Effect of Silica Supports", J. Polym. Sci. Part A: Polym. Chem. 1995, 33, 2093-2108.
62. Chen, Y.-X.; Rausch, M. D.;* Chien, J. C. W.* "1,3-Propanediyl Silylene-bis-(1-indenyl)dichlorozirconium. Synthesis and Polymerization Catalysis", J. Organomet. Chem. 1995, 487, 29-34.
63. Chen, Y.-X.; Rausch, M. D.;* Chien, J. C. W.* "Silylene-Bridged Fluorenyl-Containing Ligands and Zirconium Complexes with C1 and Cs Symmetry: General Synthesis and Olefin Polymerization Catalysis", J. Organomet. Chem. 1995, 497, 1-9.
64. Chen, Y.-X.; Rausch, M. D.;* Chien, J. C. W.* "Stereoselective Synthesis of a Germanium-Bridged Zirconocene for Temperature-Invariant Propylene Polymerization", Organometallics 1994, 13, 748-749.
65. Chen, Y.-X.; Rausch, M. D.;* Chien, J. C. W.* "Indenyl- and Fluorenyl Silanes: Synthesis and Thermal Diastereomerization", Organometallics 1993, 12, 4607-4612.
66. Chen, S. -S.; Chen, Y.-X.; Wang, J. -T.* "Investigation of Reaction Between Fulvenes and α-Naphthyllithium", Sci. China, Ser. B. 1990, 33, 769-776.
67. Chen, S.-S.; Chen, Y.-X.; Wang, J.-T.* "Studies on Ring-Bridged Bis(η5-cyclopentadienyl) Metal (IV B) Derivatives (I)", Acta Chimica Sinica 1990, 48, 298-301.
68. Chen, S.-S.; Chen, Y.-X.; Wang, J.-T.* "Studies on Ring-Bridged Bis(η5-cyclopentadienyl) Metal (IV B) and Iron Derivatives (II)", Acta Chimica Sinica 1990, 48, 582-586.
69. Chen, S.-S.; Chen, Y.-X.; Wang, J.-T.* "Reaction of Fulvenes and Aryllithiums", Scientia Sinica, B. 1989, 10, 1014-1019.

Issued Patents and Patent Applications

1. Chen, E. Y.; Kruper, W. J. "Dicationic Non-Metallocene Group 4 Metal Complexes", U.S. Pat, 6,683,199, 2004.
2. Chen, E. Y.; Kruper, W. J. "Preparation of Polymerization Catalyst Compositions", U.S. Pat, 6,673,735, 2004.
3. Chen, E. Y.; Chakraborty, D. "Polymerization Processes Using A Highly Active Catalyst", PCT Int. Appl. WO 030000750, 2003.
4. Chen, E. Y.; Feng, S.; Graf, D. D.; Patton, J. T.; Wilson, D. R. "Highly Activated Bimetallic Constrained Geometry Catalysts for Olefin Polymerization", U.S. Pat. 6,284,698, 2001.
5. Chen, E. Y. "Ansa-Group 4 Metal Bis(μ-Substituted) Aluminum Metallocenes", U.S. Pat. 6,162,935, 2000.
6. Chen, E. Y.; Campbell, R. E.; Devore, D. D.; Green, D. P.; Patton, J. T.; Soto, J.; Wilson, D. R. "Integrated Process for Preparation of Diene Complexes as Catalysts for Olefin Polymerization", U.S. Pat. 6,136,993, 2000.
7. Chen, E. Y.; Klosin, J.; Kruper, W. J.; Lapointe, R. E. "Process for Preparing Trifluoroarylaluminum Etherates", U.S. Pat. 6,160,146, 2000.
8. Chen, E. Y.; Devore, D. D. "Dimeric Group 4 Metallocenes in +3 Oxidation State", PCT Int. Appl. WO 0075152, 2000.
9. Chen, E. Y.; Kruper, W. J. "Dinuclear Fluoroaryl Aluminum Alkyl Complexes",PCT Int. Appl. WO 00015642, 2000.
10. Chen, E. Y.; Kruper, W. J.; Nickias, P. N.; Wilson, D. R. "Ansa-Group 4 Metal Bis(μ-Substituted) Aluminum Complexes", PCT Int. Appl. WO 0009523, 2000.
11. Chen, E. Y.; Kruper, W. J.; Roof, G. "Catalyst Activator Composition for Olefin Polymerization", PCT Int. Appl. WO 0009515, 2000.
12. Chen, E. Y.; Kruper, W. J.; Roof, G.; Schwartz, D. J.; Storer, J. W. "Mixture of Fluoroarylaluminum and Aryloxyaluminum Catalyst Activator Composition for Olefin Polymerization", PCT Int. Appl. WO 0009514, 2000.
13. Chen, E. Y.; Kruper, W. J.; Roof, G.; Schwartz, D. J.; Storer, J. W. "Three Coordinate Aryloxyaluminum Catalyst Activator Composition and Its Manufacture for Olefin Polymerization", PCT Int. Appl. WO 0009513, 2000.
14. Chen, E. Y.; Campbell, R. E.; Devore, D. D.; Green, D. P.; Patton, J. T.; Soto, J.; Wilson, D. R. "Integrated Process for Preparation of Diene Complexes", U.S. Pat. 6,127,563, 2000.
15. Marks, T. J.; Chen, Y.-X. "Organoborane Complexes with Metallocenes for Polymerization Catalysts", U.S. Pat. 6,087,460, 2000.
16. Marks, T. J.; Chen, Y.-X. "Synthesis and Use of (Polyfluoroaryl)fluoroanions of Aluminum, Gallium and Indium as Polymerization Cocatalysts", U.S. Pat. 6,130,302, 2000.
17. Carnahan, E. M.; Chen, E. Y.; Jacobsen, G. B.; Stevens, J. C. "Fluorohydrocarbyl-Modified Alumoxane Catalyst Activator for Polymerization of Olefins", PCT Int. Appl. WO 9915534, 1999.
18. Marks, T. J.; Li, L.; Chen, Y.-X. McAdon, M. H.; Nickias, P. N. "Perfluoro Group-Substituted Boron-Containing Activator for Transition Metal Complex Catalysts for Polymerization of Olefin", PCT Int. Appl. WO 9906412, 1999.
19. Marks, T. J., Chen, Y.-X. "Organo-Lewis Acid Cocatalysts for Cationic Homogeneous Ziegler-Natta Olefin Polymerizations", U.S. Pat. 5,856,256, 1999.
20. Marks, T. J.; Chen, Y.-X. "Phenolate Constrained Geometry Polymerization Catalyst and Method for Preparing", U.S. Pat. 5,856,258, 1999.
21. Marks, T. J.; Chen, Y.-X. "Synthesis and Use of (Perfluoroaryl)fluoro-Aluminate Anion", U.S. Pat. 5,854,166, 1998.