Characterization of Ultrafast Intramolecular Charge Transfer Dynamics in Pyrenyl Derivatives: Systematic Change of the Number of Peripheral N,N-Dimethyaniline Substituents

Citations Over TimeTop 10% of 2011 papers

Abstract

We have comparatively investigated the charge transfer (CT) dynamics of a series of covalently linked N,N-dimethylaniline (DMA) and pyrenyl derivatives (N1, N2C, N2T, N3, and N4, where 1, 2, 3, and 4 represent the number of DMA groups, and C and T are abbreviations for cis and trans, respectively). Their CT characters have been estimated in the order of N1 > N2C ≅ N2T > N3 > N4 by an increase of Stokes shift with increasing the solvent polarity. The femtosecond time-resolved fluorescence spectra show very early excited-state dynamics, a transition from the initially populated locally excited (LE) state to the CT state. The spectral analysis reveals that CT stabilization processes of N2T and N4 are relatively constant in comparison with those of N1, N2C, and N3. These results indicate that the CT characters of N1, N2C, N2T, N3, and N4 molecular systems are strongly influenced by the number and position of donor (DMA) groups onto the acceptor (pyrene) moiety.

Related Papers

• → Synthesis and Shuttling Behavior of [2]Rotaxanes with a Pyrrole Moiety(2016)26 cited
• → Fluorescence and induced circular dichroism studies on host–guest complexation between γ-cyclodextrin and pyrene(1983)89 cited
• → Solubilization Effect of Surfactants on Morphological Transformation of Cadmium and Pyrene in Co-Contaminated Soils(2015)12 cited
• → Nature of weak inter-and intramolecular interactions in crystals 8. Influence of intermolecular contacts on the strength of intramolecular O-H...N bonds in crystals of 3-(2-hydroxyphenyl)-1,2,4-triazoles(2006)3 cited
• Design, synthesis and evaluation of novel hydroxyethylamine derivatives with nitrogen heterocyclic moiety at N-terminal as BACE1 inhibitors(2010)