Uv 3101pc

Formation of the Ormosil/POM and Ormosil(NR₄⁺Cl⁻)/POM hybrids was confirmed by UV–Vis (UV3101PC, Shimadzu, Kyoto, Japan) spectrophotometry and ³¹P solid-state NMR systems (MSL-500, Bruker). ³¹P NMR spectra of hybrids were obtained using the cross-polarization/magic-angle spinning (CP/MAS) technique. The morphology of the hybrids was observed using a scanning electron microscope (SEM, Hitachi S-3000N) and a transmission electron microscope (TEM, Hitachi H-7100) equipped with an energy-dispersive X-ray (EDX, Hitachi S-300) microanalysis system. X-ray photoelectron spectroscopy (XPS, PHI 1600) was applied to determine the interactions between the Ormosil systems and the POM. The hybrids were employed in a study of their reaction with CEES at room temperature (27 °C). CEES was purchased from Aldrich and used as received. Reaction with CEES was examined by treating 3 mL of CDCl₃ solution and 10 μL of CEES with 0.2 g of the hybrid powder. After CEES loading into the hybrid powder via CDCl₃ had been completed, at periodic intervals of time up to 24 h, the solid reagent was immediately separated from the suspension by centrifugation. The CDCl₃ supernatant from centrifugation was saved for ¹³C NMR solution analysis.

(AT)₁₅-SSDNA and SWCNT were mixed in a 1 mg to 0.5 mg weight ratio in a 1 mL volume of 0.1 M NaCl. The mixture was chilled on ice and probe-tip sonicated (Cole Parmer) with a 1/4 in. tip at 40% amplitude for 20 min. The dispersion was then centrifuged twice for 90 min at 16100g to remove large particulates, undispersed SWCNTs, and other residual impurities.
All samples are analyzed by UV–vis–nIR spectroscopy (Shimadzu UV-3101PC). To calculate SWCNT concentration, absorbance at ∼632 nm was multiplied by a previously found empirical coefficient, 27.8 μg/mL.^{56 (link)} A NanoSpectralyzer 3 (Applied NanoFluorescence) was used to study the fluorescence efficiency and Raman spectra of the dispersion. This instrument consists of five laser excitation wavelengths (409, 532, 637, 671, and 784 nm), a 512-element TE-cooled InGaAs array, and a 2048-element back-thinned CCD Raman detector. The singly dispersed (AT)₁₅–SWCNTs exhibited high optical efficiency (Figure S1).

Ferric chloride (FeCl₃, 1 M) and
urea (CH₄N₂O, 1 M) solutions were mixed gently
under continuous stirring, and ammonium hydroxide (NH₄OH)
solution was added dropwise until the pH was adjusted at 10.0. After
that, the mixture was kept in a hydrothermal cell (Teflon-lined autoclave)
and placed in an oven for 6 h at 100 °C. The remaining solution
was washed several times with acetone and kept for drying at room
temperature. The synthesized/as-grown iron oxide product was dispersed
in deionized water, and optical characterizations with band gap were
executed by a UV–vis spectrophotometer (UV-3101PC, Shimadzu).
The crystallization-phase analysis was executed by a powder X-ray
diffractometer (Bruker AXS, Inc., Model D8, WI). A field emission
scanning electron microscope (Inspect F50 SEM, FEI Europe BV, The
Netherlands) was used to characterize the morphological properties,
and element composition of the synthesized materials was identified
by an energy-dispersive X-ray spectrometry (EDS) system coupled to the
FESEM.