

1. Solid-State NMR Methodology Development

References:
1. Rongchun Zhang, Kamal H. Mroue, and Ayyalusamy Ramamoorthy.* Proton-based ultrafast magic angle spinning solid-state NMR spectroscopy, Acc. Chem. Res. 2017, 50, 1105-1113.
2. Rongchun Zhang,* Vipin Agarwal,* Yusuke Nishiyama.* Proton Triple-Quantum (TQ) Solid-State NMR Spectroscopy at slow MAS~10 kHz. J. Magn. Reson. Open. 2021, 8-9, 100020
3. Hao Wang, Zhiwei Yan, Dongjia Li, Xiaoliang Wang, and Rongchun Zhang*. Solid-State NMR Spectroscopy. Encyclopedia of Polymer Science and Technology, 2022, in press.
4. Yusuke Nishiyama,* Vipin Agarwal,* Rongchun Zhang.* Efficient symmetry-based g-encoded DQ recoupling sequences for suppression of t1-noise in solid-state NMR spectroscopy at fast MAS. Solid State Nucl. Magn. Reson. 2021, 114, 101734.
5. Yusuke Nishiyama,* Vipin Agarwal,* Rongchun Zhang.* t1-Noise Suppression by r-Free Recoupling Sequences in Solid-State NMR for
Structural Characterization of Fully Protonated Molecules at Fast MAS. J. Phys. Chem. C, 2020, 124, 26332-26343
6. Rongchun Zhang, Yusuke Nishiyama,* Ayyalusamy Ramamoorthy.* Exploiting heterogeneous time scale of dynamics to
enhance 2D HETCOR solid-state NMR sensitivity. J. Magn. Reson. 2019, 309,106615.
2. Polymer network, structure-dynamics-property relationship

References:
1. Rongchun Zhang,* Chi Zhang, Zhijun Yang, Qiang Wu, Pingchuan Sun, and Xiaoliang Wang.* Hierarchical dynamics in
transient polymer network cross-linked by orthogonal dynamic bonds. Macromolecules, 2020, 53, 5937-5949.
2. 张荣纯*,多相聚合物微观结构和分子间相互作用的固体NMR研究,高分子学报,2020, 51(2), 136-147.
3. Fenfen Wang,† Shengli Chen,† Qiang Wu, Rongchun Zhang,* Pingchuan Sun.* Strain-induced structural and dynamic changes in segmental polyurethane elastomers. Polymer, 2019,163, 154-161
4. Xueting Zou, Xing Kui, Rongchun Zhang*, Yue Zhang, Xiaoliang Wang, Qiang Wu, Tiehong Chen, and Pingchuan Sun*. Viscoelasticity and Structures in Chemically and Physically Dual-Cross-Linked Hydrogels: Insights from Rheology and Proton Multiple-Quantum NMR Spectroscopy. Macromolecules, 2017, 50, 9340-9352.
5. Donglin Tian, Tao Li, Rongchun Zhang,* Qiang Wu, Tiehong Chen, Pingchuan Sun,* and Ayyalusamy Ramamoorthy.
Conformations and intermolecular interactions in cellulose/silk fibroin blend films: a solid-state NMR perspective.
J. Phys. Chem. B, 2017, 121 (25), 6108-6116
3. Polymer material design: self-healing, mechanical, shape-memory, and dynamic bonds

References:
1. Chi Zhang†, Zhijun Yang†, Nghia Tuan Duong, Xiaohui Li, Yusuke Nishiyama, Qiang Wu, Rongchun Zhang*, Pingchuan Sun*. Using dynamic bonds to enhance the mechanical performance: from microscopic molecular interactions to macroscopic properties. Macromolecules, 2019, 52, 5014-5025.
2. Zhijun Yang, Fenfen Wang, Chi Zhang, Jian Li, Rongchun Zhang*, Qiang Wu, Tiehong Chen, Pingchuan Sun*.
Bio-inspired self-healing polyurethanes with multiple stimulus responsiveness. Polym. Chem. 2019, 10, 3362-3370
3. Xiling Niu, Fenfen Wang, Xiaohui Li, Rongchun Zhang,* Qiang Wu, Pingchuan Sun.* Using Zn2+ ionomer to catalyze transesterification reaction in Epoxy Vitrimer. Ind. Eng. Chem. Res. 2019,58, 5698-570
4. Mei Li, Rongchun Zhang,* Xiaohui Li, Qiang Wu, Tiehong Chen, and Pingchuan Sun*. High-performance recyclable cross-linked polyurethane with orthogonal dynamic bonds: the molecular design, microstructures, and macroscopic properties. Polymer, 2018, 148, 127-137