On γ-irradiation, it changes color from colorless to orange, a change accompanied by a gradual disappearance of the ν(CC) stretching mode in the IR spectrum, indicating conversion to a poly(propynoate). Hydrated scandium perchlorate has long been known but it is only recently that Sc(ClO...
Figure 7(a) is the fully XPS spectrum of the 2D crystal sample coated on copper foil, which shows peaks corresponding to elements C, Cu, Al, and O. The obvious source of the Cu peak is the copper foil, while the Al peak likely originated from the aluminum oxide dehydrant. However,...
FT-IR spectrum for CsPMoV2 is presented in Fig. S4b. Catalytic tests. The hydroxylation of benzene was carried out in 100 ml stainless steel autoclave equipped with a mechanical stirrer and an automatic temperature con- troller. In a typical test, 0.1 g C3N4, 0.4 g PMoV2, 0.6 g LiOAc,...
IR and Raman spectra (organic substancesIn the presence of two‐photon absorption in benzene at 5268 , we observe coherent anti‐Stokes Raman scattering at 993 and 935 cm1. These energies correspond to symmetric ring breathing vibrations (a1gsymmetry) in the1A1gground, and1B2uexcited state of...
Langmuir: qe = qm Kl Pe 1 + KlPe (13) Figure 7. XPS analysis results of the amine functionalized HCP sample (a) survey scan spectrum of the sample (b) High resolution C 1s spectrum, (c) High resolution N 1s spectrum, (d) High resolution O 1s spectrum. Scientific Reports ...
The β-compound has a podophyllotoxin spectrum and may be formulated as (XXXIII). This leaves (XXXIV) as the structure for the γ-isomer, and in accord with the chromophore extending over the tri-oxygenated ring, double bond and lactonic functions, this has an intense band at 350 mμ in...
Characterization of samples: Comparing FT-IR spectrum of HSDC with one of SDC (Fig. 1a), the broad hydroxyl band of HSDC at 3400 cm À1 strengthened markedly, and two new bands appeared at 1716.32 cm À1 and 1216.06 cm À1 corresponding to carboxyl group and phenolic hydroxyl group [13...
Concomitant with the O-dealkylation activity for 7-ethoxycoumarin a transient peak formation at around 440 nm was observed with these oxene donors. A close correlation with temperature between activity and peak height suggests that the difference spectrum reflects the formation of the active oxygen ...
In the C 1s XPS spectrum of BS-CN (Fig. 2a), the main peak at 284.8 eV was ascribed to graphite sp2 carbon, which was derived from the benzene ring; for comparison, g-C3N4 showed the main peak at 288.2 eV corresponding to the NCN sp2 carbon [47,48]. The N 1s XPS ...
Characterization data: Yellow power, yield: 65%. Mw: 9100, Mw/Mn: 4.0 (GPC, polystyrene calibration). IR (thin film), ν (cm−1): 3066 (Ar—H stretching), 2941, 2867 (CH2stretching), 1661 (C═O stretching), 1600, 1574 (C═C ring stretching).1H NMR (300 MHz, CD2Cl2), δ...