On the morning of June 11, 2025, at the invitation of Prof. Fang Yu of the Institute of New Concept Sensors and Molecular Materials, Prof. Pi-Tai Chou from China’s National Taiwan University and Assoc. Prof. Liu Xiaogang from Singapore University of Technology and Design presented reports in the institute’s lecture hall, under the titles of “Innovative Functional Molecules/Materials, Their Fundamentals and Unique Properties” and “Fluorescent Dye Molecular Design Guided by Structure-Activity Relationships” respectively.

Prof. Chou’s report, focusing on the application of molecular design theory and spectral technology in luminescent materials and energy, expounded the “energy gap law”, and demonstrated from both theoretical and experimental perspectives an innovative strategy for suppressing internal recombination energy by the combination of exciton delocalization, deuterium isotopes, and low-frequency coherent motion of molecular self-assembly. This breakthrough transcends the limitations of the energy gap law and opens up a new field of pursuing near-infrared organic emitters through intramolecular exciton delocalization.

A/Prof. Liu systematically summarized and explored the working principle and structure-activity relationship of fluorescent dyes by combining theoretical calculations with chemical big data, proposed design rules for developing new dyes, and explored their applications in biological imaging, biochemical detection, and chemical education.

The reports were presided over by Prof. Fang Yu. Nearly 80 teachers and students from the institute attended the meeting and had discussions with the two speakers on the theory and application of optical physics technology.

In the afternoon of the same day, A/Prof. Liu Xiaogang shared the skills and experiences of writing research papers in a special report titled “Effective Science Writing”, broadening the academic horizons of the students and stimulating their interest in scientific research. This report was hosted by Prof. Peng Haonan.