The term "molecular complexity" describes the inherent richness of molecular structures, encompassing factors such as the variety of functional groups, bonding modes, symmetry, and stereo chemistry. However, when we turn our attention to molecular photo- and electronic-functions, the essential elements of complexity differ significantly. In this research project, we propose the concept of "π-molecular complexity," and through a distinctive hierarchical approach, we take on the challenge of pioneering new molecular functionalities and advancing transformative molecular technologies.

Many of those drawn to this project may find themselves captivated by novel or unusual π-conjugated molecules. Over the years, the creation of unusual π-skeletons has been extensively pursued around the world, and, since the pioneering work of Prof. Tetsuo Nozoe in non-benzenoid aromatic chemistry, Japan also has made significant contributions to the field. Yet, while numerous molecules with unique structures and properties have been discovered, achieving truly outstanding functionality remains a formidable challenge. Nevertheless, we firmly believe that even a single, exceptional functional molecule holds the potential to open new frontiers in molecular technology and pave the way to unexplored domains in molecular functional science. In this research project, we aim to create such groundbreaking molecules by synergistically exploring hierarchical π-molecular complexity from three perspectives: structural complexity, state complexity, and functional-field complexity. Through these efforts, we aspire to develop not merely unusual but truly unconventional functional π-molecular systems that transcend existing frameworks, and thereby to establish the foundation for the next generation of π-molecular science. We sincerely look forward to your participation and your bold challenges.

Head Investigator, Shigehiro Yamaguchi
Institute of Transformative Bio-Molecules, Nagoya University