= IUPAC Compendium of Chemical Terminology, fifth edition (Gold Book) by International Union of Pure and Applied Chemistry
{c}
{scope}
{tag=Work by International Union of Pure and Applied Chemistry}
{title2=2025}
= IUPAC Compendium of Chemical Terminology, fifth edition (Gold Book)
{c}
{synonym}
By <International Union of Pure and Applied Chemistry>.
Further entries: https://goldbook.iupac.org/terms/view/C00850[Carboxamides, C00850] and https://goldbook.iupac.org/terms/view/A00266[Amides, A00266]. Definitions indexed in the fifth edition distinguish the carboxamide class from the broader amide terminology.
Additional exact term locator: molecular internal conversion, I03102, https://goldbook.iupac.org/terms/view/I03102 . Primary IUPAC indexed definition describes a radiationless transition between electronic states of the same multiplicity, with increased vibrational excitation possible in the lower electronic state. This is the molecular term, distinct from nuclear internal conversion.
Kasha–Vavilov rule, entry K03371: https://old.goldbook.iupac.org/html/K/K03371.html . The primary terminology entry states excitation-wavelength independence of luminescence quantum yield and explicitly notes exceptions.
Additional definition locators: electronic state, ET07026, https://goldbook.iupac.org/terms/view/ET07026 ; radiationless transition, R05057, https://goldbook.iupac.org/terms/view/R05057 ; isosbestic point, I03310, https://goldbook.iupac.org/terms/view/I03310 . The isosbestic entry explicitly cautions that an invariant absorbance does not prove conversion between only two species. These locators support the respective state, non-photon transition and mixture-spectrum explanations.
Additional exact term locator: quantum yield, Q04991, https://goldbook.iupac.org/terms/view/Q04991/plain , DOI 10.1351/goldbook.Q04991. The indexed primary definition uses defined events per absorbed photon; absorbed spectral photon flux enters differential quantum yield. This adds the normalization definition, distinct from the already cited Kasha–Vavilov rule entry.
Copolymerisation composition equation, entry 15391, https://goldbook.iupac.org/terms/view/15391 : relates instantaneous binary copolymer composition to reacting monomer composition and reactivity ratios; notes 1 and 3 distinguish composition drift and integrated conversion-dependent forms. Monomer reactivity ratios, entry 15410, https://goldbook.iupac.org/terms/view/15410/plain : defines homopropagation-to-cross-propagation rate-constant ratios. Indexed primary definitions verified; direct page requests returned 403. The EVA article uses stipulated illustrative ratios, not measured kinetic constants for a commercial grade.
Additional terminology locators: copolymerization, C01336, https://goldbook.iupac.org/terms/view/C01336 , definition and 1996 recommendation p. 2306; copolymer, C01335, https://goldbook.iupac.org/terms/view/C01335 , definition as a polymer derived from more than one monomer species. These distinguish product identity from reacting-mixture composition.
Polymer blend, entry P04736, DOI 10.1351/goldbook.P04736: macroscopically homogeneous mixture of different polymers; components physically separable in principle; the definition makes no assumption of microscopic miscibility or number of phase domains. Official indexed entry PDF https://goldbook.iupac.org/terms/view/P04736/pdf ; indexed definition and notes inspected, direct fetch returned 403.
Homogeneous polymer blend, entry HT07582, https://goldbook.iupac.org/terms/view/HT07582 : the official indexed note states that a miscible polymer blend must obey the thermodynamic criteria of miscibility. This is distinct from the existing P04736 macroscopic blend definition.
Back to article page
