A Frontier FT-IR spectrometer (PerkinElmer, Waltham, Massachusetts, USA) was used and the spectra were obtained and processed using PerkinElmer’s Spectrum software. The absorbance values ranged from 4000 cm−1 to 650 cm−1 with 4 cm−1 scan resolution. Background scans for the ...
a MALDI-MS spectrum of PS-12min with Mw ranging from 500 to 5000 Da. Cyclic and linear polystyrenes were represented in red and blue, respectively. b Zoom-in of MALDI spectrum from (a), between 9 and 15 monomer units. c Structural classification of compounds on the ESI-MS spectra fo...
pixels in the negative control tissue (from pups of control dams) image in a process known as “Filter Spectral Library”. A spectral mapping algorithm known as “Spectral Angle Mapper” (SAM) was then utilized to match pixels to the reference spectrum to spectrally map the polystyrene in ...
The FTIR spectrum for ibuprofen has a broad peak at 3000–3300 cm−1 corresponding to the O-H stretching vibrations of the hydroxyl group of the carboxylic acid moiety, which disappeared on formation of the sodium salt and metal complexes. The absence of these vibration bands in the ...
(IR) band at 1743 cm−1. The decrease in the GO concentration in the PS/GO composites mass from 5 wt.% to 0.5 wt.% induces a diminution in the intensities of the D and G Raman bands of GO simultaneous with a down-shift of the D band from 1351 to 1322 cm−1. These ...
The pure terbium complexes had the strongest emission spectrum, followed by the bifunctional fibers without the addition of Fe3O4 nanoparticles. The unit mass of the Tb(acac)3phen complexes in bifunctional microfibers was 1.2 times the luminescence intensity of that in pure Tb(acac)3phen ...
Accordingly, the IR band characteristics of h–toluene are not visible anymore in the spectrum, while those from d–chloroform cannot be easily distinguished from those of the deuterated sPS. Additional sharp spectral features due to h–acetone were observed (indicated by the blue vertical arrows)...