katalyyttiselläisillä

Katalyyttiselläisillä is a Finnish term used to describe catalytic systems that derive their activity from the collective action of multiple sites or components, rather than a single active site. It covers catalysts that operate through cooperative interactions, multi-site turnover, or catalytic networks, including ensemble catalysts, relay or cascade catalysis, and enzyme mimics.

Etymology and usage notes: The term is built from the word katalyytti (catalyst) with suffixes that signal plurality and relational positioning. In Finnish chemistry literature, it appears in discussions of cooperative or network-based catalysis. It is not part of a single, universally standardized nomenclature, and its precise scope can vary among authors and contexts.

Examples and concepts: Katalyyttiselläisillä concepts appear in multi-site homogeneous catalysts where neighboring sites cooperate, solid-state catalysts with interacting neighboring centers, and porous materials like metal-organic frameworks that host distributed catalytic sites. It also covers enzyme-like systems such as artificial metalloenzymes and catalytic networks where multiple steps are linked through relay or cascade mechanisms.

Characteristics and challenges: Common features include cooperativity between sites, control of selectivity by spatial arrangement, and potential for enhanced turnover through relay effects. Challenges include the complexity of synthesizing such systems, difficulty in characterizing the individual contributions of each site, and the need for methods that can quantify cooperative effects.

Significance and context: The concept helps model and design catalysts for complex reaction networks and sustainable chemical processes, and it provides a language for describing systems where activity arises from collective behavior rather than a single active site. As a term, its use is contextual and may be replaced by more established phrases like cooperative catalysis or cascade catalysis in some literature.