Dr. Junpeng Wang
Dr. Junpeng Wang is a physical organic and materials chemist. Prior to joining U Akron as an assistant professor of Polymer Science, he worked as postdocs with Prof. Jeremiah Johnson at Massachusetts Institute of Technology and Prof. Luping Yu at University of Chicago, respectively. He conducted his PhD research on polymer mechanochemistry with Prof. Stephen Craig at Duke University, and obtained his PhD degree in chemistry in 2015.
We are interested in understanding the interplay between the molecular-level knowledge and macroscopic properties of polymeric materials. On one hand, the molecular information, such as the molecular structures as well as the intermolecular and intramolecular interactions, determine many important polymer properties, including glass transition temperature, crystallinity and mechanical properties. On the other hand, the macroscopic properties could also impact the molecular interactions. For example, the diffusion and bond exchange in a glassy polymer would occur much slower than in a rubbery one. Polymer mechanochemistry is a subject that concerns how macroscopic force couples to single molecules and to activate reactions. It perfectly weaves the molecular-level insights and the macroscopic properties and involves many interesting fundamental and applied questions. For example, how does the force-induced chemistry impact the material properties? If so, can we leverage the chemistry to alter and control materials properties? Can we use the force-induced chemistry to monitor the dynamics of the mechanics, such as the process of stress dissipation? What types of materials would facilitate the force transmission and force-induced reactions? Can we manipulate the material properties to maximize the force-induced reactions?
- Zhou, J.; Sathe, D.; Wang, J.* “Understanding the Structure–Polymerization Thermodynamics Relationships of Fused-Ring Cyclooctenes for Developing Chemically Recyclable Polymers,” J. Am. Chem. Soc., 2022, DOI: 10.1021/jacs.1c11197.
- Wang, W.; Zhou, Z.; Sathe, D.; Tang, X.; Moran, S.; Jin, J.; Haeffner, F.; Wang, J.; Niu, J.* “Degradable Vinyl Random Copolymers via Photocontrolled Radical Ring-Opening Cascade Copolymerization,” Angew. Chem. Int. Ed., 2021, DOI: 10.1002/anie.202113302.
- Chen, H.; Shi, Z.; Hsu, T.-G.; Wang, J.* “Overcoming the Low Driving Force in Forming Depolymerizable Polymers through Monomer Isomerization,” Angew. Chem. Int. Ed., 2021, 60, 25493-25498.
- Zhu, T.; Shen, L.; Chen, H.; Yang, Y.; Zheng, L.; Chen, R.; Zheng, J.; Wang, J.*; Gong, X.* “Conjugated Molecules Based 2D Perovskites for High-Performance Perovskite Solar Cells,” J. Mat. Chem. A2021, 9, 21910-21917.
- Sathe, D.; Zhou, J.; Chen, H.; Su, H.-W.; Xie, W.; Hsu, T.-G.; Schrage, B.; Smith, T.; Ziegler, C. J.; Wang, J.* “Olefin Metathesis–Based Chemically Recyclable Polymers Enabled by Fused-Ring Monomers,” Nat. Chem., 2021, 13, 743-750.
- A Polymer with "Locked" Degradability: Superior Backbone Stability and Accessible Degradability Enabled by Mechanophore Installation.
5 Feb 2020 Journal of the American Chemical Society 142(5):2100-2104
Hsu T-G, Zhou J, Su H-W, Schrage BR, Ziegler CJ, Wang J
- Counting loops in sidechain-crosslinked polymers from elastic solids to single-chain nanoparticles
22 May 2019 Chemical Science 10(20):5332-5337
Wang J, Wang R, Gu Y, Sourakov A, Olsen BD, Johnson JA
- Counting Secondary Loops Is Required for Accurate Prediction of End-Linked Polymer Network Elasticity
20 Feb 2018 ACS Macro Letters 7(2):244-249
Wang J, Lin T-S, Gu Y, Wang R, Olsen BD, Johnson JA
- Combined Constant‐Force and Constant‐Velocity Single‐Molecule Force Spectroscopy of the Conrotatory Ring Opening Reaction of Benzocyclobutene
2 Jun 2017 ChemPhysChem 18(11):1486-1489
Kouznetsova TB, Wang J, Craig SL
- Mechanical gating of a mechanochemical reaction cascade
1 Dec 2016 Nature Communications 7(1):13433
Wang J, Kouznetsova TB, Boulatov R, Craig SL
- Single-Molecule Observation of a Mechanically Activated Cis-to-Trans Cyclopropane Isomerization.
24 Aug 2016 Journal of the American Chemical Society 138(33):10410-10412
Wang J, Kouznetsova TB, Craig SL
- Wang, J.; Piskun, I.; Craig, S. L., “Mechanochemically Strengthening of a Multi-mechanophore Benzocyclobutene Polymer”, ACS Macro Lett., 2015, 4, 834-837.
- Wang, J.; Kouznetsova, T. B.; Niu, Z.; Ong, M. T.; Klukovich, H. M.; Rheingold, A. L.; Martinez, T. J.; Craig, S. L., “Inducing and Quantifying Forbidden Reactivity with Single Molecule Polymer Mechanochemistry”, Nat. Chem., 2015, 7, 323-327.
- Wang, J.; Kouznetsova, T. B.; Kean, Z. S.; Fan, L.; Mar, B. D.; Martinez, T. J.; Craig, S. L., “A Remote Stereochemical Lever Arm Effect in Polymer Mechanochemistry”, J. Am. Chem. Soc., 2014, 136, 15162-15165.
- Shi, J.; Huang, X.; Wang, J.; Li, R., “A Theoretical Study on C−COOH Homolytic Bond Dissociation Enthalpies”, J. Phys. Chem. A 2010, 114, 6263-6272.
- Ph.D., Chemistry, Duke University, 2015
- B.S., Chemistry, University of Science & Technology of China, 2010