Matches in SemOpenAlex for { <https://semopenalex.org/work/W2091296451> ?p ?o ?g. }
- W2091296451 endingPage "41" @default.
- W2091296451 startingPage "33" @default.
- W2091296451 abstract "Bitumen free radicals are located within the planar polynuclear aromatic ring systems of bituminous crystallites in such a manner as to optimize their stabilization by the resonance of delocalized π-electrons. The states of spin multiplicity exhibited by these substances are revealed by the observed transitions under thermal excitations. Experimental ESR intensity-temperature dependence data from several asphaltic bitumens, a model compound (phthalocyanine), and a few charge-transfer complexes were collected. Curves containing both exponential (singlet-triplet) and Curie-Weiss (doublet) components were then calculated from the curves and found to be consistent with published results. This spin correlation indicates that both singlet-triplet transitions and doublet states exist within the bituminous aromatic sheets. This and other forms of thermal excitation (e.g., Russell effect), may be attributed to the propagation of Wannier excitons. The predominance of doublet concentrations in high vanadium samples (e.g., Mara asphaltene) indicates that spins are localized by nuclei-spin interactions." @default.
- W2091296451 created "2016-06-24" @default.
- W2091296451 creator A5004604235 @default.
- W2091296451 creator A5077589077 @default.
- W2091296451 date "1973-02-01" @default.
- W2091296451 modified "2023-09-25" @default.
- W2091296451 title "Spin excitations of bitumens" @default.
- W2091296451 cites W1985673030 @default.
- W2091296451 cites W2006991347 @default.
- W2091296451 cites W2013991257 @default.
- W2091296451 cites W2014068128 @default.
- W2091296451 cites W2014215073 @default.
- W2091296451 cites W2018979962 @default.
- W2091296451 cites W2025831101 @default.
- W2091296451 cites W2028969634 @default.
- W2091296451 cites W2032279344 @default.
- W2091296451 cites W2044091362 @default.
- W2091296451 cites W2052510118 @default.
- W2091296451 cites W2057273874 @default.
- W2091296451 cites W2057555625 @default.
- W2091296451 cites W2068686513 @default.
- W2091296451 cites W2070875302 @default.
- W2091296451 cites W2074433257 @default.
- W2091296451 cites W2080342185 @default.
- W2091296451 cites W2085305999 @default.
- W2091296451 cites W2085527587 @default.
- W2091296451 cites W2087524047 @default.
- W2091296451 cites W2087656010 @default.
- W2091296451 cites W2175795793 @default.
- W2091296451 cites W2313936499 @default.
- W2091296451 cites W4249054156 @default.
- W2091296451 doi "https://doi.org/10.1016/0008-6223(73)90006-7" @default.
- W2091296451 hasPublicationYear "1973" @default.
- W2091296451 type Work @default.
- W2091296451 sameAs 2091296451 @default.
- W2091296451 citedByCount "31" @default.
- W2091296451 countsByYear W20912964512015 @default.
- W2091296451 countsByYear W20912964512019 @default.
- W2091296451 countsByYear W20912964512020 @default.
- W2091296451 countsByYear W20912964512022 @default.
- W2091296451 countsByYear W20912964512023 @default.
- W2091296451 crossrefType "journal-article" @default.
- W2091296451 hasAuthorship W2091296451A5004604235 @default.
- W2091296451 hasAuthorship W2091296451A5077589077 @default.
- W2091296451 hasConcept C121332964 @default.
- W2091296451 hasConcept C17729963 @default.
- W2091296451 hasConcept C178790620 @default.
- W2091296451 hasConcept C181500209 @default.
- W2091296451 hasConcept C184779094 @default.
- W2091296451 hasConcept C185592680 @default.
- W2091296451 hasConcept C187961010 @default.
- W2091296451 hasConcept C26873012 @default.
- W2091296451 hasConcept C2778870898 @default.
- W2091296451 hasConcept C33062035 @default.
- W2091296451 hasConcept C41999313 @default.
- W2091296451 hasConcept C42704618 @default.
- W2091296451 hasConcept C46141821 @default.
- W2091296451 hasConcept C62520636 @default.
- W2091296451 hasConcept C65324659 @default.
- W2091296451 hasConcept C70050531 @default.
- W2091296451 hasConcept C83581075 @default.
- W2091296451 hasConcept C97355855 @default.
- W2091296451 hasConceptScore W2091296451C121332964 @default.
- W2091296451 hasConceptScore W2091296451C17729963 @default.
- W2091296451 hasConceptScore W2091296451C178790620 @default.
- W2091296451 hasConceptScore W2091296451C181500209 @default.
- W2091296451 hasConceptScore W2091296451C184779094 @default.
- W2091296451 hasConceptScore W2091296451C185592680 @default.
- W2091296451 hasConceptScore W2091296451C187961010 @default.
- W2091296451 hasConceptScore W2091296451C26873012 @default.
- W2091296451 hasConceptScore W2091296451C2778870898 @default.
- W2091296451 hasConceptScore W2091296451C33062035 @default.
- W2091296451 hasConceptScore W2091296451C41999313 @default.
- W2091296451 hasConceptScore W2091296451C42704618 @default.
- W2091296451 hasConceptScore W2091296451C46141821 @default.
- W2091296451 hasConceptScore W2091296451C62520636 @default.
- W2091296451 hasConceptScore W2091296451C65324659 @default.
- W2091296451 hasConceptScore W2091296451C70050531 @default.
- W2091296451 hasConceptScore W2091296451C83581075 @default.
- W2091296451 hasConceptScore W2091296451C97355855 @default.
- W2091296451 hasIssue "1" @default.
- W2091296451 hasLocation W20912964511 @default.
- W2091296451 hasOpenAccess W2091296451 @default.
- W2091296451 hasPrimaryLocation W20912964511 @default.
- W2091296451 hasRelatedWork W1966263681 @default.
- W2091296451 hasRelatedWork W1991677577 @default.
- W2091296451 hasRelatedWork W2006947814 @default.
- W2091296451 hasRelatedWork W2046488013 @default.
- W2091296451 hasRelatedWork W2050246313 @default.
- W2091296451 hasRelatedWork W2099377513 @default.
- W2091296451 hasRelatedWork W2144470133 @default.
- W2091296451 hasRelatedWork W2972586695 @default.
- W2091296451 hasRelatedWork W3210505103 @default.
- W2091296451 hasRelatedWork W4307715496 @default.
- W2091296451 hasVolume "11" @default.
- W2091296451 isParatext "false" @default.
- W2091296451 isRetracted "false" @default.
- W2091296451 magId "2091296451" @default.