Professor Jiang has been widely recognized as a distinguished scientist and pioneer in the area of 2D polymers and covalent organic frameworks (COFs). Since 2005, Dr. Jiang has been devoted to the design, synthesis, and functional exploration of 2D polymers and COFs when he set up an independent laboratory at Institute for Molecular Science (IMS), National Institutes for Natural Sciences (NINS), and SOKENDAI, Japan. He has been a leading figure in the field of 2D polymer and COFs; his groundbreaking work laid the foundation for the development and understanding of COFs. He has explored the design principles of tetragonal, trigonal, Kagome and anisotropic COFs, the synthetic reactions including azine, phenazine, squaranine and C=C linkages, and the materials and their structure-originated functions. Dr. Jiang has developed the first examples, including the semiconducting COFs, light-emitting COFs, photoconductive COFs, energy-storage COFs, asymmetric catalytic COFs, photocatalytic COFs, ion-conducting COFs and spin-functional COFs through disclosing interplays between COFs with photons, phonons, electrons, holes, spins, ions, and molecules, thus leading,  developing, and deepening the area.
Professor Jiang has also pioneered the area of conjugated microporous polymers (CMPs) that are a class of amorphous yet conjugated organic networks. Dr. Jiang has focused on design, synthesis and functions of CMPs. Light-harvesting antennae effect, light-emitting materials, catalytic systems, supercapacitive energy storage, super absorbents and energy conversions have been developed in this laboratory. Dr. Jiang also developed the method based on electrochemistry for designed synthesis of thin films of CMPs on various substrates for developing devices.