Judith Percino

Synthesis, characterization and theoretical calculations of model compounds of silanols catalyzed by TEMPO to elucidate the presence of Si–O–Si and Si–O–N bonds

We report the results from the reactions of 1-phenylethanol, 2-methylpropanol, trimethylsilanol and triphenylsilanol with TEMPO, OH-TEMPO and Br-TEMPO salt at different reaction conditions to obtain model functionalized compounds. With 1-phenylethanol, the ketone compound was obtained as expected, but when using triphenylsilanol the corresponding hexaphenyldisiloxane [di(triphenylsilane)ether] was obtained in crystal form, as well as the silaneoxiamine (Si–O–N). The hexaphenyldisiloxane crystal belonged to the triclinic crystal system with a space group P, a = 8.5829(4) A, b = 9.4856(4) A, c = 10.9694(5) A, α = 95.951(4)°, β = 90.059(3)°, γ = 113.352(4)°, the asymmetric unit comprised of Z = 1. The results showed that the synthetic method to obtain silane ether is simple and can be completed in one step, as well as independently of the type of TEMPO and base used. Also, under the same reactions conditions, we prepared the corresponding TEMPO-containing silanes as triphenylsilaneoxiamine and observed formation of Si-oxide chains through an in situ polycondensation reaction. The resulting compounds were characterized by FT-IR spectroscopy, mass spectrometry (EI), and 1H-NMR. The best assignment for infrared spectroscopy characterization and the structural parameters by vibrational frequencies were determined by DFT calculations.

Quantitative analysis of intermolecular interactions in 2,2’-((4-bromophenyl)methylene)bis(3-hydroxy-5,5-dimethylcyclohex-2-en-1-one): insights from crystal structure, PIXEL, Hirshfeld surfaces and QTAIM analysis

The crystallographic study of 2,2’-((4-bromophenyl)methylene)bis(3-hydroxy-5,5-dimethylcyclohex-2-en-1-one) reveals that the compound crystallizes in the centrosymmetric space group

Synthesis, Characterization, and Optical Properties of New Two-Photon-Absorbing Fluorene Derivatives

P2_{1}/c

Synthesis and characterization of novel rigid two-photon absorbing polymers {

P21/c. In the solid state, the structure of the title compound exhibits two strong intramolecular

Oxygen to carbon atoms ratio effect on the size, morphology and purity of functionalized carbon nanoshells by using alcohol mixtures as carbon source

\hbox {O}{-}\hbox {H}\cdots \hbox { O}

Physicochemical study by multi-angle light scattering of water-soluble methacryloylaminophenylarsonate copolymers

O-H⋯O hydrogen bonding interactions. Further, molecules of the title compound are self-assembled by weak intermolecular