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Titolo:
High temperature behavior of alternant and nonalternant polycyclic aromatic hydrocarbons
Autore:
Necula, A; Scott, LT;
Indirizzi:
Boston Coll, Merket Chem Ctr, Dept Chem, Chestnut Hill, MA 02467 USA Boston Coll Chestnut Hill MA USA 02467 Chem, Chestnut Hill, MA 02467 USA
Titolo Testata:
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
fascicolo: 1-2, volume: 54, anno: 2000,
pagine: 65 - 87
SICI:
0165-2370(200003)54:1-2<65:HTBOAA>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
FLASH-VACUUM-PYROLYSIS; POTENTIAL-ENERGY SURFACE; THERMAL REARRANGEMENTS; ANOMALOUS FLUORESCENCE; RING CONTRACTIONS; BENZENE-RING; AUTOMERIZATION; ACEANTHRYLENE; CORANNULENE; NAPHTHALENE;
Keywords:
high temperature; polycyclic aromatic hydrocarbon; pyrolysis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
77
Recensione:
Indirizzi per estratti:
Indirizzo: Necula, A Boston Coll, Merket Chem Ctr, Dept Chem, Chestnut Hill, MA 02467USA Boston Coll Chestnut Hill MA USA 02467 stnut Hill, MA 02467 USA
Citazione:
A. Necula e L.T. Scott, "High temperature behavior of alternant and nonalternant polycyclic aromatic hydrocarbons", J AN AP PYR, 54(1-2), 2000, pp. 65-87

Abstract

Three different flash vacuum pyrolysis (FVP) set-ups were employed for thestudy of the thermal behavior of alternant and nonalternant polyclic aromatic hydrocarbons (PAH). The 1,2-switch of carbon atoms in the thermal automerizations of PAH, previously observed in benzene, pyrene and benz[a]anthracene, has been additionally observed for [1-C-13]anthracene, [6-C-13]benzo[c]phenanthrene and [1-C-13]- and [4-C-13]phenanthrenes at temperatures between 900 and 1100 degrees C. Bay region PAH (chrysene, benz[a]anthracene, phenanthrene, picene, perylene, benzo[ghi]perylene, benzo[e]pyrene, and benz[a,c]-anthracene) were discovered to undergo an intriguing transformation when heated at 1100 degrees C; the transformation is believed to be triggeredby cyclodehydrogenation across the bay region. Thermal formation of five-membered rings was used to synthesize a series of new nonalternant hydrocarbons. When the thermal closure of a five-membered ring is energetically unfavorable, migration of an ethynyl group from one benzene ring to another along the edge of a PAH (e.g. anthracene) can take place. (C) 2000 Published by Elsevier Science B.V.

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Documento generato il 24/09/20 alle ore 11:25:03