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

descriptionPublicationkeyboard_double_arrow_right Article 01 Feb 2013 Spain English Publisher:Elsevier BVJournal:Chemical Physics, volume 412, pages 77-83 (issn: 0301-0104,

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Authors: M. Franckevičius; R. Vaišnoras; M. Marcos; J.L. Serrano; V. Gulbinas;

doi: 10.1016/j.chemphys.2012.12.017

handle: 10261/73517

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

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Abstract

Femtosecond 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.

M.F. acknowledges EU Structural Funds project “Postdoctoral Fellowship Implementation in Lithuania” for funding his postdoctoral fellowship. This research was also funded by the European Social Fund under the Global Grant measure.

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Spain

Related Organizations

University of Zaragoza
Spain
Center for Physical Sciences and Technology
Lithuania
Spanish National Research Council
Spain
Vilnius University
Lithuania

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