Browsing by Author "Treto-Suárez, Manuel A."

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    Assessing the electronic properties of bimetallic complexes with N-M-N-M cycle (M = Ag, Au and Cu)
    (2024) Zarate, Ximena; Treto-Suárez, Manuel A.; Hidalgo-Rosa, Yoan; Schott Verdugo, Eduardo Enrique
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    Fluorescent B(III) and Sn(IV) Schiff base: Synthesis, photophysical properties, emergent behavior, applications, and fluorescence mechanism
    (Elsevier Ltd., 2026) Ibarra-Rodríguez, Marisol; Jiménez-Pérez, Víctor M.; Lara-Cerón, Jesús A.; Molina-Paredes, Areli A.; Hidalgo-Rosa, Yoan ; Schott Verdugo, Eduardo; Paez-Hernández, Dayán; Treto-Suárez, Manuel A.; Zárate, Ximena; Muñoz-Flores, Blanca M.
    In this review, we describe the preparation methods, photophysical properties, and applications of fluorescent Boron(III) and Tin(IV) Schiff base. Although Schiff base have been known for a long time, Boron(III) and Tin(IV) compounds derived from them have gained significant attention in materials chemistry in recent decades. Remarkably, fluorescent organoboron and organotin complexes offer several advantages, such as being synthesized via green methods and exhibiting desirable physical and optical properties. Notably, the low cytotoxicity of organoboron compounds makes them excellent fluorescence dyes for in vitro and in vivo bioimaging. We present the most recent studies of Boron(III) and Tin(IV) compounds and highlight the favorable photophysical and physicochemical properties. Furthermore, we discuss materials that respond to various stimuli -physical, chemical and biological. Some fluorescent organoboron and tin complexes behave as smart materials, showing multi-stimuli responsiveness through processes such as mechanochromism, thermochromism, piezochromism, and vapochromism, most of which are observed in the solid-state. We also include several quantum chemical studies aimed at understanding the electronic structures and optical properties of these fluorescent Schiff base complexes.
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    Synthesis and theoretical study of copper sensitive pyridine azo-derivatized chemosensors
    (2025) Tapia-Merino, Jorge; Treto-Suárez, Manuel A.; Bonetti, Giovanna; Zarate, Ximena; Schott Verdugo, Eduardo Enrique
    The synthesis and spectroscopic characterization of two new N,N-bis(pyridin-2-ylmethyl)-4-(X-diazenyl)aniline (X: A = CH3, Bdouble bondCN) chemosensors were carried out. Both compounds are yellow in H2O/CH3CN solution as a free ligand. Upon contact with Cu2+ cations, the solution becomes colorless. UV–Vis absorption studies of the sensors show that this color change is due to the Cu2+ interaction with the sensor with 1:1 stoichiometry, causing a blue shift of the characteristic band, and high selectivity. In addition, theoretical calculations were performed using time-dependent density functional theory (TDDFT) and Morokuma-Ziegler decomposition analysis. The theoretical results display a good correlation with the experimental data. The transition π→π∗ is evidenced as characteristic of the free sensor and the complexes formed by the sensor and metals. Other metal ions (different from copper) were also experimentally and theoretically studied. Only the Cu2+ complexes showed an increase in the band intensity at 312–323 nm displaying an LMCT character (π→3dx2-y2)) with a strong contribution of the 3d molecular orbitals of Cu2+ ions.