专家学术报告
|
报告题目 |
Cobalt-Catalyzed Carbonylative Polymerization and Materials Therefrom |
|
报告时间 |
2012年12月13日 (星期四) 上午10:30 |
|
报告地点 |
材料楼五楼会议室 |
|
报告人 |
Dr. Li Jia (Associate Professor), University of Akron |
Cobalt-Catalyzed Carbonylative Polymerization and Materials Therefrom
Li Jia
Department of Polymer Science
University of Akron
Cobalt-catalyzed carbonylative polymerization (COP) of heterocycles is potentially a useful method for synthesis of a wide range of polyamides and polyesters (eq 1). The presentation willfirst focus on the development of this class of catalytic polymerization.[1] The evolving mechanistic understanding will be discussed based on our synthetic explorations and kinetic studies. The scope and limitation of the polymerization will be then discussed, including the suitable monomer types for the polymerization and the control of the microstructure and architecture of the polymer products.
The properties of the poly(b-alanoid)s (X = NR) synthesized via COP of aziridines will be then presented. The superb protein-adsorption resistance of the highly water-soluble members of poly(b-alanoid)s (R = Me or Et) is demonstrated by surface plasma resonance spectroscopy (Figure 1).[2]
Figure 1. Representative SPR sensorgrams showing very low level of adsorption when the poly(ethyl-b-alanoid)-modified surfaces are exposed to biological fluids.
Finally, oligo(b-alanine)s as a new physical crosslinking platform for thermoplastic elastomers will be presented. Only a few weight percent of oligo(b-alanine)s is necessary for physical crosslinking to occur. The oligo(b-alanine)s form filaments in the elastomeric matrix according to transmission electron microscopy.
[1]J. Am. Chem. Soc. 2004, 126, 13808-13815. Ibid, 14716-14717.
[2]Biomacromolecules, 2011, 12, 2573-2582.
Dr. Li Jia
Associate Professor of Polymer Science
Department of Polymer Science
The University of Akron
Akron, Ohio 44325-3909
Email: ljia@uakron.edu
Voice: (330) 972-7511
Fax: (330) 972-5290
Education
1996 Ph.D., Chemistry, Northwestern University
1991 B.Sc., Lanzhou University
Research Interests
Metal-catalyzed polymerization, supramolecular micelles and elastomers, synthesis of polymeric
electronic and optoelectronic materials, and soft lithography via nanoparticle self-assembly.
Recent Publications
1. Lin, S.; Zhang, B.; Skoumal, M. J.; Ramunno, B.; Li, X.; Wesdemiotis, C.; Liu, L.;* Jia,
L.;* "Antifouling poly(ß-peptoid)s", Biomacromolecules 2011, 12, 2573-2582.
2. Bhawalkar, S. P.; Qian, J.; Heiber, M. C.; Jia, L.;* "Development of a colloidal lithography
method for patterning nonplanar surfaces", Langmuir 2010, 26, 16662-6666.
3. Qian, J.; Bhawalkar, S. P.; Xu, Y.-S.; Jia, L.;* "Novel use of polymer brush in colloidal
lithography to overcome lateral capillary force", ACS Appl. Mater. Interfaces 2010, 2,
3111-3118.
4. Wang, C.; Kim, F. S.; Ren, G.; Xu, Y.; Pang, Y.; Jenekhe, S. A.;* Jia, L.;* "Regioregular
poly(3-alkanoylthiophene): Synthesis and electrochemical, photophysical, charge
transport, and photovoltaic properties", J. Polym. Sci. Part A: Polym. Chem. 2010, 48,
4681-4690.
5. Lin, S.; Yu, X.; Tu, Y.; Xu, H.; Cheng, S. Z. D.;* Jia, L.;* "Poly(ß-alanoid-blockß-
alanine)s: Synthesis via cobalt-catalyzed carbonylative polymerization and
self-assembly", Chem. Commun. 2010, 46, 4273-4275.
6. Ray, M. A., Shewmon, N.; Bhawalkar, S.; Jia, L.;* Yang, Y.; Daniels, E. S.; "Submicron
surface patterning using interfacial colloidal particle self-assembly", Langmuir 2009, 25,
7265-7270.
7. Chai, J.; Wang, C.; Jia, L.;* Pang, Y.; Graham, M.; Cheng, S. Z. D.; "Synthesis and
electrochemical properties of a new class of boron-containing n-type conjugated
polymers", Synthetic Metals 2009, 159, 1443-1449.
8. Chai, J.; Liu, G.; Chaicharoen, K.; Wesdemiotis, C.; Jia, L.;* "Cobalt-catalyzed
carbonylative polymerization of azetidines", Macromolecules 2008, 41, 8980-8985.
9. Ray, M. A.; Jia, L.;* "Micropatterning by non-densely packed interfacial colloidal
crystals", Adv. Mat. 2007, 19, 2020-2022.
10. Liu, G.; Jia, L.;* "Carbonylative copolymerization of azetidines and tetrahydrofuran. Dual
role of azetidine and synthesis of poly(amide-co-ester) with periodic ester distribution",
Angew. Chem., Int. Ed. 2006, 45, 129-131.
11. Ray, M. A.; Kim, H.; Jia, L.;* "Dynamic self-assembling. Linear periodic structure
generated by evaporation of colloidal solution on flat surface", Langmuir 2005, 21,
4786-4789.
12. Liu, G.; Jia, L.;* "Design of carbonylative polymerization of heterocycles. Synthesis of
polyesters and poly(amide-block-ester)s", J. Am. Chem. Soc. 2004, 126, 14716-14717.
Patents
1. Caporale, S.; Barclay, G. G.; Wang, D.; Jia, L. "Compositions and processes for
immersion lithography", 2007, patent application: US30/855,715.
2. Jia, L.; Ray, M. A.; "Bottom-up surface self-assembly of polymer colloids to form
patterned arrays", 2006, patent application: US60/839,592.
Professional Affiliations
American Chemical Society
Materials Research Society
International Society for Optical Engineering (SPIE)
Honors
NSF CAREER Award
DuPont Young Professor Award
Lindback Minority Junior Faculty Award
1.gif
2.gif
lijia-Akron.jpg
