Tepkide

Tepkide is a term encountered mainly in Turkish-language chemical literature and is not part of standard English nomenclature. It denotes particles formed as a result of a chemical reaction, i.e., reaction products, including solids, liquids, or gases.

In practice, tepkide can refer to discrete particles or molecular species that accumulate during a reaction, as opposed to reactants or catalysts. In catalysis, tepkide particles may decorate catalyst surfaces or exist as colloids or aerosols, influencing activity and selectivity. In atmospheric chemistry, tepkide-like particles correspond to secondary aerosol components produced by oxidation and polymerization of precursor gases. In materials science, tepkide can refer to by-products that affect material properties or phase formation.

Detection and analysis: Methods such as transmission electron microscopy (TEM), scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDS), mass spectrometry, infrared or Raman spectroscopy, and X-ray diffraction (XRD) are used to characterize tepkide's size, morphology, composition, and structure.

Etymology and status: The word tepkide is a calque of the Turkish term tepki (reaction) with -ide as a suffix, echoing English chemistry terms like oxide or sulfide but not implying a mineral class. It is not widely standardized; in English-language literature the equivalent concept is typically called reaction products, by-products, or product species.

See also: reaction mechanism, by-product, catalyst, aerosol, solid-state chemistry.