| |
| Yi Pang |
| |
The Lester E. and Kathleen A. Coleman Associate Professor
B.S., 1981, Zhengzhou University, China
Ph.D., 1990, Iowa State University
Postdoctoral Fellow, 1991-1993, Ames Laboratory, Iowa State University
Faculty, 1994-2005, Clark Atlanta University |
| |
Office: KNCL 401A
(330) 972-8263 |
| |
Lab: KNCL 417
(330) 972-7121 |
| |
| Email: yp5@uakron.edu |
| |
| Website: |
| |
| Research Interests |
| |
| Luminescent Polymers |
| |
| A major recent development in the field of molecular electronics has been the discovery of electroluminescent conjugated polymers. Emission of bright light when excited by flow of electricity through the conjugated polymers makes these materials attractive for commercial applications such as backlights for liquid crystal displays, large screen displays, and lasers. A reliable polymeric light-emitting diode device requires the polymer emissive layer to exhibit high efficiencies in photoluminescence and electroluminescence. Our goal is to develop such materials to meet the practical requirements, through design and synthesis of new polymers with high luminescence and improved stability. The applications include light-emitting diodes and photovoltaic devices. |
| |
| Optical absorption and emission spectra at low temperature has been proven to be a useful tool in elucidating the vibronic structure of a p-conjugated molecule. We have also found that the low temperature spectroscopy, in conjunction with proper solvent effects, provides an improved probe to study the molecular aggregation, which is important for device application. We will continue to use the low temperature probe to characterize the optical properties of luminescent materials, and to aid the development of new polymers of high luminescence. |
| |
 |
| |
| Chemical Sensors |
| |
| The luminescence signals of a material change, sometimes drastically, with the chemical environment, such as heavy metals. In this field, we will modify the polymer structure to develop sensor materials. With proper chelating groups, one can selectively bind the targeted metal ions, thereby enhancing the selectivity. We are particularly interested in the polymer systems which can undergo a large molecular conformational change upon metal chelation. |
| |
 |
| |
| Selected Publications |
| |
| L. Liao, A. Cirpan, L. Ding, F.E. Karasz, and Y. Pang. Efficient Poly[5-diphenylamino-1,3-phenylenevinylene)-alt-(2,5-dihexyloxy-1,4-phenylenevinylene)] Derivatives: Synthesis and Optical Properties. J. Polym. Sci. Part A.: Polym. Chem., 2006, 44, 2307-2315. |
| |
Q. Chu and Y. Pang. Terpyridine-Substituted Fluorescent Polymers and Their Chelation with Zinc Ion: Ligand-to-Metal-Ratio and Optical Properties. J. Polym. Sci. A.: Polym.
Chem., 2006, 44, 2338-2345.
|
| |
| L. Liao, A. Cirpan, Q. Chu, F. E. Karasz, and Y. Pang ¡§Synthesis and Optical Properties of Light-Emitting ƒà-Conjugated Polymers Containing Biphenyl and Dithienosilole.¡¨ J. Polym. Sci. Part A: Polym. Chem. 2007, 45 (10), 2048-2058. |
| |
| “Aggregation and Self-Assembly of Oligo(2,5-dialkoxy-1, 4-phenyleneethynylene)]s: An Improved Probe to Study Inter- and Intra-Molecular Interaction.” Q. Chu, Y. Pang; Macromolecules, 2005, 38, 517-520. |
| |
| “Blue-Emitting Poly(1,3-phenylenevinylene) Derivatives: Effect of Substitution Patterns on the Optical Properties.” L. Liao, Y. Pang, L. Ding, and F. E. Karasz; J. Polym. Sci. Part A: Polym. Chem., 2005, 43, 2800-2809. |
| |
| “Synthesis and Luminescence of Yellow/Orange-Emitting Poly[tris(2,5-dihexyloxy-1,4-phenylenevinylene)-alt-(1,3-phenylenevinylene)]s” L. Liao, Y. Pang, L. Ding, F. E. Karasz, P. R. Smith, and M. A. Meador; J. Polym. Sci. Part A: Polym. Chem., 2004, 42, 5853-5862. |
| |
| “A Highly Efficient Light-Emitting Poly[5-(dipenylamino)-1,3-phenylene vinylene]-alt-(2,5-dihexyloxy-1,4-phenylene vinylene)]: Synthesis and Optical Properties.” L. Liao, Y. Pang, L. Ding, and F. E. Karasz; Macromolecules, 2004, 37, 3970-3972. |
| |
| “Green-Emitting Poly[(1,3-phenylenevinylene)-alt-(1,4-phenylenevinylene)]s: Effect of Substitution Patterns on the Optical Properties.” L. Liao, Y. Pang, L. Ding, and F. E. Karasz; J. Polym. Sci. Part A: Polym. Chem. 2004, 42(8), 1820-1829. |
| |
| “Poly[(2-alkoxy-5-methyl-1,3-phenylene vinylene)-alt-(phenylene vinylene)] Derivatives with Different Content of cis-and trans-Olefins: Effect of Olefin Bond Geometry and Conjugation Length to Luminescence.” L. Liao, Y. Pang, L. Ding, F. E. Karasz; J. Polym. Sci. Part A: Polym. Chem. 2004, 42(2), 303-316. |
| |
| “Vibronic Structures in the Electronic Spectra of Oligo(phenylene ethynylene): Effect of m-Phenylene to the Optical Properties of Poly(m-phenylene ethynylene).” Q. Chu, Y. Pang; Spectrachimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2004, 60(7), 1459-1467. |
| |
| “Blue-Emitting Poly[(m-phenylene vinylene)-alt-(o-phenylene vinylene)]s: Effect of Regioregularity on the Optical Properties.” L. Liao, Y. Pang, L. Ding, F. E. Karasz; J. Polym. Sci. Part A: Polym. Chem., 2003, 41, 2650-2658. |
| |
| “A Yellow Light-Emitting Cyano-Substituted Poly[(1,3-phenylenevinylene)-alt-(1,4-phenylenevinylene)] Derivative: Its Synthesis and Optical Properties” L. Liao, Y. Pang, L. Ding, F. E. Karasz; J. Polym. Sci. Part A: Polym. Chem. 2003, 41, 3149-3158. |
| |
| “Molecular Aggregation of Poly[(1,3-phenyleethynylene)-alt-oligo(2,5-dialkoxy-1, 4-phenyleneethynylene)]: Effect of Solvent, Temperature, and Polymer Conformation.” Q. Chu, Y. Pang; Macromolecules, 2003, 36, 4614-4618. |
| |
| “Green-Emitting PPE-PPV Hybrid Polymers: Efficient Energy Transfer across meta-Phenylene Bridge.” Q. Chu, Y. Pang, L. Ding, F. E. Karasz; Macromolecules, 2003, 36, 3848-3853. |
| |
|
