A5011584250- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Crystallography and molecular interactions
- Organometallic Compounds Synthesis and Characterization
- Organometallic Complex Synthesis and Catalysis
- Synthesis and Characterization of Heterocyclic Compounds
- Organoboron and organosilicon chemistry
- Nonlinear Optical Materials Research
- Crystal structures of chemical compounds
- Synthesis and biological activity
- Synthesis and Biological Evaluation
- Porphyrin and Phthalocyanine Chemistry
- Asymmetric Synthesis and Catalysis
- Natural product bioactivities and synthesis
- Supramolecular Chemistry and Complexes
- Luminescence and Fluorescent Materials
- Synthesis and Biological Activity
- Estrogen and related hormone effects
- Phytochemical Studies and Bioactivities
- Spanish Literature and Culture Studies
- Synthetic Organic Chemistry Methods
- Metal complexes synthesis and properties
- Molecular spectroscopy and chirality
- Nonlinear Optical Materials Studies
- Advanced Chemical Physics Studies
Center for Research and Advanced Studies of the National Polytechnic Institute
2009-2024
Instituto Politécnico Nacional
2009-2024
Centro de Investigación en Materiales Avanzados
1999-2001
We describe in this paper the synthesis, crystallization, and solid-state NMR dynamics of molecules intended to emulate structure function macroscopic compasses. The desired structures consist polar pyridine (2) pyridazine (3) groups as well their corresponding N-oxides (2O 3O), each linked axially two bulky triphenyl methyl by 1,4-triple bonds. are such that central heterocycles may rotate about dialkyne axle while being sterically shielded trityl groups. In addition synthesis samples with...
Herein is reported the synthesis of three new borinates (2a–2c) derived from bidentate imine ligands (1a–1c), which were prepared corresponding cinnamaldehyde derivatives. All compounds characterized by MS, IR and NMR spectroscopy. The nonlinear optical (NLO) characterization these molecules having push–pull properties included. Second order nonlinearities evaluated at 1.907 μm electric-field-induced second harmonic (EFISH) technique through β×μ product, showing a trend for general increase...
We report the synthesis and characterization of four molecular rotors 2, 3, 4, 5 containing 2-fluoro-, 2,3-difluoro-, 2,5-difluoro-, 2,3,5,6-tetrafluoro-substituted 1,4-phenylene rotators, respectively, that are axially linked through triple bonds rigid mestranol (3-methoxy-17α-ethynylestradiol) stators. Crystallization experiments using solvent mixtures hexanes–ethyl acetate acetonitrile–dichloromethane gave rise to polymorphic, pseudopolymorphic, isomorphic crystals. Whereas two solids...
The design, synthesis, and characterization of seven novel steroid-coumarin conjugates with diverse steroidal nuclei as lipophilic fluorescent materials for bioimaging applications are presented. were synthesized through amidation, characterized using spectroscopic spectrometric methods, their main photophysical properties determined. Dioxane : water titration experiments revealed ability to self-assemble, forming J-aggregates evidenced by new spectral bands at higher wavelengths....
Nine new organotin (IV) derivatives from L-amino acids (l-lysine, L-ornithine, L-glutamic acid, and L-aspartic acid) were synthesized by one-pot ultrasound-assisted methodology. All compounds characterized ATR-FTIR (Attenuated Total Reflectance-Fourier Transform Infrared), LRMS (Low-Resolution Mass Spectrometry), solution NMR (
Two molecular rotors featuring pyridine and fluorobenzene rings as polar rotators 9-octylfluorenyl stators were synthesized. Their crystal structures established through SXRD techniques, crystallizing in the monoclinic chiral P21 space group. The supramolecular assemblies of both isomorphs showed an orientation static dipoles lattice formation intriguing 2D layers that resemble cell membranes, a typical example amphidynamic system. Small activation energies modulation first-order...
Our study focuses on molecular rotors with fast-moving rotators and their potential applications in the development of new amphidynamic crystals. Steroidal a dipolar fluorine-substituted phenyl group as rotator were synthesized characterized. Three different investigated varying numbers fluorine atoms. A comprehensive analysis was performed using vibrational spectroscopy (Raman, FT-IR), electronic circular dichroism (ECD), dielectric response to understand behavior model rotors. The results...
Abstract. Three new nonsymmetric bimetallic diorganotin compounds derived from hexadentate Schiff bases were obtained by reaction of 2,6-dihydroxybenzene-1,3-dicarbaldehyde with R-(-)-phenylglycinol, glycine and 2-amino-5-nitrophenol, in the presence dibutyltin oxide. The full multinuclear NMR analysis, IR elemental analyses allowed to establish structures all compounds. In three cases, 119Sn chemical shifts are indicative two different pentacoordinated tin atoms solution. molecular...
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