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AuthorAl-Ansari, Ibrahim A. Z.
Available date2015-11-05T06:57:46Z
Publication Date1997
Publication NameJournal of Physical Organic Chemistry
ResourceWiley Online Library
CitationAl-Ansari, I.A.Z. (1997), Ground- and excited-state properties of some 3,4-dihydro-1-(2-p-substituted benzylidene)naphthalenones: substituent and environmental effects. J. Phys. Org. Chem., 10: 687-696. https://doi.org/10.1002/(SICI)1099-1395(199709)10:9<687::AID-POC932>3.0.CO;2-A
ISSN1099-1395
URIhttp://dx.doi.org/10.1002/(SICI)1099-1395(199709)10:9<687::AID-POC932>3.0.CO;2-A
URIhttp://hdl.handle.net/10576/3629
AbstractElectronic absorption and steady-state fluorescence emission of seven 3,4-dihydro-1-(2-p-substituted benzylidene)naphthalenones (1–7) show sizable solvent dependence. The charge-transfer (CT) absorption maxima of these compounds in various solvents show a red shift for the electron-donating substituted compounds (1–5), whereas a blue shift is observed for compounds possessing electron-withdrawing substituents (6, 7). Excitation into the lowest energy absorption gives emission from the locally excited state, which relaxes to the emitting intramolecular charge-transfer state for compounds with strong electron-donating substituents (1–3) in hydroxylic solvents. However, in moderately polar solvents, dual emissions are observed for these compounds. No CT emission is observed for the compounds with moderate electron-donating substituents (3 and 4) or those with electron-withdrawing substituents (6 and 7). Compound 1 with an –N(CH3)2 substituent shows an excited-state dipole moment of 17 D.
Languageen
PublisherJohn Wiley & Sons, Ltd.
Subjectabsorption
fluorescence
solvatochromism
hydrogen bonding
dipole moment
naphthalenones
TitleGround- and excited-state properties of some 3,4-dihydro-1-(2-p-substituted benzylidene)naphthalenones: substituent and environmental effects
TypeArticle
Issue Number9
Volume Number10
dc.accessType Abstract Only


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