Crystal Engineering seminars

Producing metal-organic frameworks as nanoparticles could make them easier to process at industrial scale and change properties such as transport. Controlled synthesis and the effects of particle size remain insufficiently understood. Carl K. Brozek presents synthetic methods and mechanistic models for preparing MOF nanoparticles whose electrical conduction, magnetism, optical response and dynamic bonding differ from bulk frameworks. Solution-state spectroscopy and electrochemistry expose size-dependent and interfacial effects that conventional framework materials do not reveal. The work provides approaches for scalable MOF manufacture while raising broader questions about relationships among structure, size and properties. Speaker: Associate Professor Carl K. Brozek, University of Oregon, Department of Chemistry and Biochemistry. Hosted by Jack Zhang and Kevin Kittilstved for Washington State University Chemistry. Monday 19 October 2026, 16:10–17:00 America/Los_Angeles (Pacific Daylight Time). Attend at Fulmer Hall, Room 201, Washington State University, Pullman, Washington, USA, or use the public Zoom Link on the official event page.

Organic multicomponent crystals can alter material properties without changing the covalent structures of their constituent molecules. René de Gelder examines how these crystals can be classified and how chirality affects the resulting classes and subclasses. Thousands of structures in resources such as the Cambridge Structural Database provide the basis for a network-science analysis of structural diversity. The approach seeks principles governing multicomponent crystal formation, ways to predict new combinations, and a map of the transition between cocrystals and salts.

Omar M. Yaghi examines how reticular chemistry changes the scale and diversity of materials that chemists can design. By joining molecular building blocks into extended structures, researchers have developed large families of metal–organic frameworks and covalent organic frameworks with tunable internal spaces and functions. The lecture asks how artificial intelligence and robotics could accelerate the preparation and exploration of these materials, moving chemical discovery from scarcity toward abundance. Yaghi connects this approach to carbon capture and the collection of water from air, building on design principles for nanoporous frameworks and their applications in gas storage and separation. The discussion extends the metal–organic framework research recognised by the 2025 Nobel Prize in Chemistry into current methods for discovery and environmental applications.

Richard Robson, Susumu Kitagawa and Omar M. Yaghi examine the origins, development and applications of metal–organic frameworks. Robson follows the emergence of coordination polymers and the design of extended molecular structures from pre-organized building blocks, explaining the architectural ideas behind framework construction. Kitagawa describes how coordination chemistry led to porous materials and then to flexible crystalline structures. His discussion of soft porous crystals shows how frameworks can respond to external stimuli, opening and closing as they capture molecules, with implications for gas storage and separation. Yaghi considers how fundamental framework chemistry can connect to industrial and societal applications, including emerging uses of artificial intelligence. Together, the lectures show how complementary approaches to molecular design, porosity and responsive structure developed into a broad materials research field.

Self-organized complex structures in nature, e.g., viral capsids, hierarchical biopolymers, and bacterial flagella, offer efficiency, adaptability, robustness, and multi-functionality. Can we program the self-assembly of three-dimensional (3D) complex structures using simple building blocks, and reach similar or higher level of sophistication in engineered materials? Here we present an analytic theory for the self-assembly of polyhedral nanoparticles (NPs) based on their crystal structures in non-Euclidean space. We show that the unavoidable geometrical frustration of these particle shapes, combined with competing attractive and repulsive interparticle interactions, lead to controllable self-assembly of structures of complex order. Applying this theory to tetrahedral NPs, we find high-yield and enantiopure self-assembly of helicoidal ribbons, exhibiting qualitative agreement with experimental observations. We expect that this theory will offer a general framework for the self-assembly of simple polyhedral building blocks into rich complex morphologies with new material capabilities such as tunable optical activity, essential for multiple emerging technologies.