RESUMEN
Functionalizing the organic building blocks of electrically conductive MOFs (EC-MOFs) can be a powerful method for adjusting the electronic structure and introducing a specific chemistry. However, designing EC-MOF linkers with reactive functional groups for postsynthetic modification is challenging due to the requirements of d-p conjugation. This work addresses such design limitations by synthesizing an EC-MOF, Cu-thiatruxene (Cu-thiaTRX). This conductive framework incorporated a truxene-based linker with heterocyclic sulfur, allowing for efficient conjugation and an electrical conductivity of 2.2 × 10-2 S cm-1. Harnessing sulfur chemistry in Cu-thiaTRX involves a two-step postsynthetic modification: oxidation and SNAr. The sulfinic groups introduced in the framework enabled tunable proton conductivity, leading to a 200-fold improvement. These results highlight the importance of a rational linker design for functionalization.
RESUMEN
We study the evolution of a massive scalar field surrounding a Schwarzschild black hole and find configurations that can survive for arbitrarily long times, provided the black hole or the scalar field mass is small enough. In particular, both ultralight scalar field dark matter around supermassive black holes and axionlike scalar fields around primordial black holes can survive for cosmological times. Moreover, these results are quite generic in the sense that fairly arbitrary initial data evolve, at late times, as a combination of those long-lived configurations.
RESUMEN
Los tratamientos odontológicos en niños tienen una gran complejidad en su realización y dependen de distintos factores para alcanzar el éxito clínico, estos pueden ser resumidos en tres, que son: la selección de los materiales, la habilidad o destreza por parte del clínico, además de la cooperación del paciente. Objetivo: Conocer las propiedades biológicas de la pasta CTZ, así como sus ventajas y desventajas frente a otros materiales actualmente usados en la terapia pulpar en niños. Métodos: Se realizó un tratamiento de pulpectomía, a través de la NIET (Técnica de Endodoncia No Instrumentada), en la clínica de Odontopediatría, de la DEPeI, de la Facultad de Odontología, de la UNAM, quien presentó proceso de necrosis pulpar. Resultados: Estudios recientes muestran que los componentes de la pasta CTZ, tienden a ser más efectivos en el tratamiento de pulpectomía que otros materiales, encontrando que pacientes tratado con esta pasta, a la exploración clínica dos semanas después de su colocación se encontraban asintomáticos; y el examen radiográfico realizado a los 2, 4 y 6 meses reveló una reducción o estabilización de la lesión periapical. Conclusiones: La pasta CTZ ha mostrado excelentes resultados y reduce la carga bacteriana hasta niveles mínimos. Las características de la pasta permiten al clínico realizar tratamientos pulpares en menor tiempo y obtener resultados superiores a otras técnicas convencionales...(AU)
Dental treatments in children are very complex to carry out and depend on different factors to obtain a clinical success, mainly depending in: selection of materials, clinical abilities and patient´s cooperation. Objective: To know the biological properties of the CZT paste, as well as its advantages and disadvantages compared with other materials currently used in pulpar therapy in children. Method: A pulpectomy treatment was carried out by NIET (non-instrumented endodontic technique in the Pediatric Dentistry Clinic of the Postgraduate School, School of Dentistry, UNAM. All patients presented pulpar necrosis. Results: Recent studies have shown that the components of the CZT paste are more effective in pulpectomy treatment than other materials, finding asymptomatic patients after two weeks of treatment with this paste. Radiographic examination after 2, 4 and 6 months revealed a reduction or stabilization of the periapical lesion. Conclusions: The CZT paste has shown excellent results and reduces the bacteria concentration to minimal level. The characteristics of this paste allow the clinician to carry out pulpar treatment in less time and to obtain superior results comparing with conventional techniques...(AU)
