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Fully conjugated push–pull dendrons with high dipole moments in excited state; synthesis and theoretical rationalization
Author(s) -
TadeoLeón Javier,
Fomine Serguei,
Bizarro Monserrat,
Guadarrama Patricia
Publication year - 2015
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/poc.3411
Subject(s) - chemistry , solvatochromism , excited state , dipole , conjugated system , dendrimer , ground state , density functional theory , photochemistry , molecule , molecular physics , chemical physics , computational chemistry , atomic physics , organic chemistry , physics , polymer
Novel fully conjugated push–pull dendrons were synthesized by a divergent approach to evaluate the performance of non‐conventional architectures like dendritic one in charge separation processes associated with photovoltaic events. The dipole moments in excited state were estimated by the solvatochromic method, to be related to the charge separation efficiency. A 1:2 ratio of donor–acceptor groups (methoxy and nitro groups respectively) promotes the largest dipole moment in both ground and excited state (up to 17 D), due to the efficient electron density transfer over the entire molecule, through the π‐electron system. The synthesized dendrons induce charge transfer on excitation as follows from UV–vis absorption–emission analysis and theoretical calculations. Copyright © 2015 John Wiley & Sons, Ltd.