Determination of Copper in Different Ethanolic Matrices Using a Chloropropyl Silica Gel Modified with a Nanostructured Cubic Octa(3‐aminopropyl)octasilsesquioxane

Carmo, Devaney Ribeiro do; Bicalho, Urquisa de Oliveira; Silveira, Tayla Fernanda a; Filho, Newton Luiz Dias; Paim, Leonardo Lataro

doi:10.1155/2013/509341

Cited by 5 publications

(2 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is a trend in supramolecular chemistry in the synthesis of Platonic or Archimedean polyhedral clusters by chemical fragments, eventually with metallic ions complexing suitable ligands. In this respect, homeomorphs of the cube, of various chemical composition, have been already synthesized [ 6 , 8 , 22 , 23 ]. For cubane and related structures see refs.…”

Section: Introductionmentioning

confidence: 99%

Cube-Rhombellane Related Structures: A Drug Perspective

2018

View full text Add to dashboard Cite

Rhombellanes represent a new class of structures, of which homeomorphs may be synthesized as real molecules. Cube-rhombellane is a double-shell structure, with vertices of degree 3 and 6, respectively. Several hypothetical structures/molecules were proposed and computed using molecular graph theory and coordination chemistry principles. Some geometries were optimized at the B3LYP/6-31G (d, p) level of theory, followed by harmonic vibrational frequency analysis at the same level of theory, single point data were collected in view of molecular stability evaluation. Some of the bioactive functionalized structures were also proposed and explored by molecular mechanics (MM)-based conformational analysis, to check their internal mobility. Drug-like properties of the proposed molecular structures were compared with some existing nano-molecules (fullerenes, nanotubes). ADME and other physico-chemical characteristics were computed using commercial software. Substructures of the proposed molecules, useful in a future synthesis, were provided by retro combinatorial synthesis (RECAP). Computational results obtained are promising regarding ADME properties, drug-likeness and nano-properties.

show abstract

Section: Introductionmentioning

confidence: 99%

Cube-Rhombellane Related Structures: A Drug Perspective

2018

View full text Add to dashboard Cite

show abstract

“…Silsesquioxanes are materials with an empirical formula (RSiO 1.5 )n, where R is a hydrogen atom or an organic group (Do Carmo, Bicalho, Silveira, Dias Filho, & Paim, 2013;Cordes, Lickiss, & Rataboul, 2010;Baney, Itoh, Sakakibara, & Suzukit, 1995;Kuo & Chang, 2011;Xu, Loo, & Wang, 2011;Tanaka & Chujo, 2012;Li-Chih & Shea, 2011) and n = 4, 6, 8, 10 (n ≥ 4) (Cordes, Lickiss, & Rataboul, 2010). Due to their intrinsic quality properties, and as a consequence in recent years there has been a large increase in the number of patents and publications related to these materials (Laine & Roll, 2011;Cordes, Lickiss, & Rataboul, 2010).…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Thermal Properties of Silsesquioxane Organically Modified With 4,5-Diphenyl-2-Imidazolethiol

Carmo

Magossi²,

Bicalho³

et al. 2014

IJC

View full text Add to dashboard Cite

The present paper describes the preparation of a nanostructured silsesquioxane, the octa-(3-chloropropyl)-octasilsesquioxane (S) that was organofunctionalised with the 4,5-Diphenyl-2-imidazolethiol (DIT). The modification of silsesquioxane with DIT proposed in this paper follows two steps. The composite prepared after functionalization was ascribed as SDIT. The composite SDIT and precursors were characterized by infrared (FTIR), 13 C and 29 Si Nuclear Resonance Magnetic (NMR) in solid state, Scanning Electron microscopy (SEM); X-Ray Diffraction (XRD); Energy-Dispersive X-ray spectroscopy (EDS) and Thermogravimetry. By spectroscopic analysis using above techniques, we conclude with that the SDIT synthesis was conducted with success. It was observed a cluster of particles containing cavities in an orderly fashion. The themogravimetry analyzes performed in two different atmospheres, concluding that the materials (S, DIT and SDIT) when in air atmosphere has a slower degradation process in relation to nitrogen atmosphere. The thermogravimetry of SDIT indicate a greater thermal stability in nitrogen atmosphere.

show abstract