- Picosecond structural relaxation of abietic acid based amine end capped para-phenylenevinylene trimers in solution.
Picosecond structural relaxation of abietic acid based amine end capped para-phenylenevinylene trimers in solution.
Chemphyschem : a European journal of chemical physics and physical chemistry (2008-10-03)
Roberto E Di Paolo, Barbara Gigante, Maria A Esteves, Natércia Pires, Célia Santos, Maria H Lameiro, João Seixas de Melo, Hugh D Burrows, António L Maçanita
PMID18830995
ABSTRACT
The synthesis and photophysical properties of six new abietic acid based amine end-capped p-phenylenevinylene trimers (AECPV3) in their lowest excited singlet states are presented. The AECPV3 compounds show a large red-shift of both the absorption (25-30 nm) and emission (37-42 nm) maxima with respect to those of the corresponding trimers. Picosecond time-resolved fluorescence data reveal the presence of a fast conformational relaxation process (40-62 ps) of the initially excited compounds, leading to more planar conformers. The conformational relaxation time is proportional to the volume of both the side chain and the amine groups.
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