Our Research

The Saint-Louis Lab Research Focus

The Saint-Louis Lab develops programmable molecular organic materials that harness light to sense, communicate, and respond to their environment. By integrating organic synthesis, photochemistry, and materials science, we create molecular systems with emergent optical and functional properties that enable next-generation technologies in sensing, imaging, controlled molecular release, and responsive materials.

Research Area 1:

Light-Controlled Molecular Function

We develop visible-light-responsive molecular systems that transform light into molecular function, enabling precise spatiotemporal control over chemical and biological processes.

We are developing a new class of thiophene-based o-nitrobenzyl photolabile protecting groups (PPGs) that absorb in the visible region of the electromagnetic spectrum, allowing milder reaction conditions and more selective light-triggered activation than traditional UV-responsive systems. A key target is the synthesis and controlled release of hydroxamic acids, which serve as important building blocks for anti-cancer drug candidates and are often challenging to prepare and handle by conventional routes. By incorporating these PPGs into light-responsive smart materials, we aim to enable on-demand photo cleavage of such biologically relevant molecules. This strategy broadens the scope of applications to targeted drug delivery, photo-responsive polymer architectures, and dynamic molecular devices.

Research Area 2:

Molecular Materials that Harness Light

We design boron(B)-nitrogen(N)-containing functional materials with tunable optical and electronic properties.

We design, synthesize, and investigate novel fluorescent molecules containing a three-coordinate boron atom bonded to carbon, nitrogen, and hydroxyl groups. By introducing the boron–nitrogen bond into polycyclic aromatic hydrocarbon organic fluorophores, we can systematically tune their electronic and photophysical properties. Our work seeks to understand how the B-N bond incorporation influences intermolecular interactions, emission behavior, and material stability, thereby enabling the development of next-generation sensors, imaging agents, and optoelectronic materials.

Looking Forward

Our long-term goal is to establish the molecular design principles that enable organic materials to sense, communicate, and response to their environment. By harnessing light-responsive molecules and advanced functional materials, we seek to create a new generation of molecular technologies that transcend traditional boundaries between chemistry, photonics, and information processing.

Keywords – Programmable Molecular Materials,  Molecular Photonics, Boron-Nitrogen Chemistry, Fluorescent Materials, Photochemistry, Optical Sensing, Adaptive Materials, Photoresponsive Molecular Systems, Chemical Biology,  Molecular Imaging