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Excited state dynamics of PPI dendrimers functionalized with 4-(4′-ethoxybenzoyloxy)salicylaldehyde chromophores

AuthorsFranckevicius, M.; Marcos, Mercedes; Serrano, José Luis
Issue Date2013
CitationChemical Physics 412: 77-83 (2013)
AbstractFemtosecond transient absorption spectroscopy has been applied for the investigation of the excited state dynamics of poly(propyleneimine) dendrimers functionalized with 4-(40-ethoxybenzoyl-oxy)salicylaldehyde (SA) promesogenic units. Different transient absorption dynamics of three different tautomeric forms of SA chromophore groups have been distinguished. Cis-keto and enol-closed tautomeric forms experience opening of pseudo-aromatic ring and fast relaxation to the conformationally distorted ground state of trans-keto tautomeric form. No tautomeric changes take place under direct excitation of the trans-keto tautomers.
Identifiersdoi: 10.1016/j.chemphys.2012.12.017
issn: 0301-0104
Appears in Collections:(ICMA) Artículos
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