Abstracts Book - IMRC 2018

• SF2-P010
SYNTHESIS AND CHARACTERIZATION OF SECOND GENERATION
CONJUGATED DENDRIMERS WITH RESORCINARENE CORE
Damaris Castro Monter 1 , Rosa Angeles Vazquez 1 , Marcos Martínez García 2 , María Isabel Reyes
Valderrama 1 , Karina Aleman Ayala 1 , Eleazar Salinas Rodriguez 1 , Ventura Rodriguez Lugo 1
1 Universidad Autónoma del Estado de Hidalgo, Instituto de Ciencias Básicas e Ingeniería, Área
Académica de Ciencias de la Tierra y Materiales, Mexico. 2 Universidad Nacional Autónoma de
México, Facultad de Química, Mexico.
Conjugated organic systems are the base for the design of new optoelectronic
devices that require, for example, color tunability, large active area, mechanic
flexibility and low cost processing. Within these systems we find conjugated
dendrimers, which are monodisperse, highly branched three-dimensional
macromolecules with nanometer-scale dimensions having dendrons with the
ability to delocalize electrons [1]. Conjugated dendrimers have completely
reproducible chemical and physical properties based on their precisely defined
molecule structures and molecular weights. Combining the advantages of both
polymer and small molecule materials, conjugated dendrimers have become a
promising type of material for today’s organic electronics industry [2]. In this
work, π-conjugated second generation dendrimers with applications in the
optoelectronic field were synthesized and characterized. Dendrimers were
grown using the convergent method with resorcinarenes as central molecules,
which were obtained by condensation reaction between resorcinol and two
different types of aldehydes: dodecyl aldehyde and trans-cinnamaldehyde.
Thiophene, quinoline and pyridine groups are present in the dendrons, were
made using different reactions such as: Heck type reactions and Wittig type
reactions, Knoevenagel condensation, reductions and halogenations. The
optical and electronic properties of the dendrimers were calculated using the
Density functional theory (DFT) with the B3LYP functional hybrid model in
combination with 6-31G(d) basis set. The time-dependent (TD) –DFT study was
performed using the BHandHLYP model and the set 6-31G (d). Theoretical
values of Band Gap in a range of 3.3 to 3.5 eV for the units of the synthesized
dendrimers were obtained. The theoretical absorption values have λmax in a
range between 400-430 nm. The experimental optical properties in solution
were obtained with Ultraviolet-visible and Flourescence spectroscopies,
absorption values in the range between 280-450 nm and emission values in
ranges between 400-580 nm were obtained. The molecular structures of the