Construction and electronic properties of carbon nanotube hybrids with conjugated cubic silsesquioxane

Abstract

We herein reprot a hierarchical hybrid preparaed from zero-dimensional cubic silsesquioxane, octa-aminophenylsilsesquioxane, and one-dimensional single-walled carbon nanotubes (SWNT) through Friedel-Crafts acylation and amidation chemistry.We characterized the electronic structure and morphology of the nanohybrid by FT-IR spectra, Raman spectra, electrochemical analysis and field-emission scanning electron microscope. In addition, High resolution TEM results indicated that their average diameter and diameter distribution remained nearly unchanged with respect to that of the pristine, in accordance with the Raman spectroscopic results. The specific 2 capacitance of abtained hybrid was larger than that of the pristine SWNT due to the hierarchical structure and the charge transfer from both SWNT and octa-aminophenylsilsesquioxane. To further study the electronic properties of conjugated functionalized silsesquioxane, the model compounds with a structure similar to that of the nanohybrid were desighed and characterized by photoluminescence UV-vis analysis and density functional theoretical calculations.The analysis indicated the presence of an electron delocalization effect between the octa-aminophenylsilsesquioxane cores and the conjugated group. Such important electronic properties also assisted in the improvement of the performance for hierarchical hybrid.

Molecular Transformation, Diffusion, and Assembling into Three-Dimensional Freestanding Tube Arrays via a Triphasic Reaction

“…After the addition of the Ag/C catalyst and NaBH 4 to nitrobenzene solution, the peak at 270 nm disappeared and two new peaks at 230 and 280 nm appeared after 1 min (Figure a). These two newly generated peaks are characteristic absorbance bands of aniline . Nitrobenzene exists as a droplet in phase I, and its solubility in water is 1.9 mg/mL.…”

“…These two newly generated peaks are characteristic absorbance bands of aniline. 43 Nitrobenzene exists as a droplet in phase I, and its solubility in water is 1.9 mg/mL. The disappearance of the nitrobenzene absorbance band indicates that nitrobenzene immediately reacted to form aniline.…”

Electrocatalysis of Lindane Using Antimony Oxide Nanoparticles Based-SWCNT/PANI Nanocomposites

“…The peaks at 2930 and 2340 cm −1 observed in the high frequency region were attributed to the symmetric mode and anti-symmetric mode of CH 2 (Tchoul et al, 2007 ; Helali et al, 2016 ). The peak observed at 1698 cm −1 was assigned to the carbonyl stretching vibration demonstrating the introduction of a carboxyl group on the surface of the nanotubes (Xu et al, 2015 ). The peak at 1104 cm −1 was assigned to either the SWCNT defects or residual carbon impurities or both (Helali et al, 2016 ).…”

Influence of POSS fillers on the transport properties of natural rubber nanocomposites

“…POSS based hybrid systems are also in demand for use in specific technological applications and are popular due to their tunable surface groups and diverse properties . POSS nanoparticles also form hybrids with other nanoparticles like carbon nanotubes , graphene oxide , silica , nanoclay and so on which greatly reduces the problem of nanoparticle agglomeration. Although various works has been done with POSS‐elastomer systems, their nanocomposites with NR are an unexplored area.…”