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1‐(Arylalkenyl)pyrenes – Synthetic, Structural, Photophysical, Theoretical, and Electrochemical Investigations
Author(s) -
Sharif Muhammad,
Reimann Sebastian,
Wittler Kai,
Knöpke Leif R.,
Surkus AnnetteE.,
Roth Christian,
Villinger Alexander,
Ludwig Ralf,
Langer Peter
Publication year - 2011
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.201100620
Subject(s) - chemistry , intramolecular force , substituent , electrochemistry , differential pulse voltammetry , pyrene , photochemistry , absorption spectroscopy , basis set , absorbance , context (archaeology) , cyclic voltammetry , computational chemistry , electronic structure , spectroscopy , density functional theory , organic chemistry , electrode , paleontology , physics , quantum mechanics , chromatography , biology
As a new approach for tuning the electronic properties of pyrene derivatives, we converted 1‐bromopyrene into different substituted styrenes using the Mizoroki–Heck reaction. Several 1‐(arylalkenyl)pyrenes have been characterized and their electronic properties studied by absorption and emission spectroscopy. The effect of the electronic ambience on the emission spectra of these compounds is discussed. Amongst the intramolecular influences, such as electron donating or withdrawing groups, other influences in the form of solvatochromatism are considered. Electrochemical oxidation potentials determined by DPV (differential pulse voltammetry) are discussed with regard to substituent effects. The fine structure of the absorbance spectra obtained from photophysical measurements is compared with theoretical calculations performed by time dependent B3LYP DFT (TD‐DFT) methods using the 6‐31G* basis set. In this context, we discuss the calculated potential energy surfaces and geometric structures with regard to the substitution pattern of the pyrenes.