Synthesis, characterization and photophysical-theoretical analysis of compounds A-π-D. 1. Effect of alkyl-phenyl substituted amines in photophysical properties

摘要: Abstract The study of new dipolar A-π-D molecules, which have an acceptor (A) and donor (D) charge joined by a conjugate bridge, been attention focus in the recent years due their different properties. In current work, molecular system has modified order to compare effect on properties, such as quantum yield. Thus, two series were generated (alkyl- alkoxy-substituted) determine if molecules with tertiary asymmetric amines change optical properties whether yield is affected. products characterized several techniques UV–Vis spectrophotometry, elemental analysis, NMR, FT-IR, mass spectroscopy fluorescence spectroscopy. Furthermore, behavior eight organic solvents, dichloromethane, tetrahydrofuran, ethyl acetate, 1,4-dioxane, acetone, acetonitrile, dimethylformamide dimethylsulfoxide experimentally theoretically studied. yields higher for alkyl-substituted series. Theoretically, dihedral angles formed between amine carbonyl group moieties correlation values, helping explain why they are non-polar solvents. Consequently, maximum was obtained (E)-2-cyano-3-(5-((E)-2-(9,9-diethyl-7-(methyl(phenyl)amino)-9H-fluoren-2-yl) vinyl)thiophen-2-yl)acrylic acid (M8-1) reaching 98.8%.