Dynamics and vibrational coupling of methyl acetate dissolved in ethanol

Effect of catalyst morphology and hydrogen co-feeding on the acid-catalysed transformation of acetone into mesitylene

“…However, two distinct peaks are noticed, at ∼1726 and 1736 cm -1 for νC=O acetone and νC=O acetate, respectively. 44 The assigning of the νC=O acetate band is also proved in Figure 6b by the presence of the C-C stretching vibration mode band of acetate (νC-C) at 750-840 cm -1 . 44 Furthermore, the intensities of the absorption bands increase with the reaction time, which implies higher saturation of the material surface and strong adsorption of the intermediates and compounds yielded.…”

“…44 The assigning of the νC=O acetate band is also proved in Figure 6b by the presence of the C-C stretching vibration mode band of acetate (νC-C) at 750-840 cm -1 . 44 Furthermore, the intensities of the absorption bands increase with the reaction time, which implies higher saturation of the material surface and strong adsorption of the intermediates and compounds yielded. The acetate band becomes the most relevant one among the νC=O bands after 4 h. In this light, it is considered that these adsorbed acetates could be the cause of deactivation of the active sites, since the strong-adsorption of acetates is one of the most usual reasons of catalytic deactivation in these types of reactions, promoting the coke formation on the catalytic surface.…”

Manipulating Interfacial pH by the Base-Catalyzed Hydrolysis Strategy for Highly Reversible Zinc Anodes

“…To reveal the feasibility of the hydrolysis strategy, Raman spectra was conducted to the MA-ZnSO 4 electrolyte before and after the Zn plating process. As shown in Figure c, after Zn plating, the peak located at around 640 cm –1 , which associated with the OC–O bending of MA molecule weakens and is overwhelmed by the broad peak signal of CH 3 –CO 2 (610 cm –1 ) . This implies that MA molecules engage in the hydrolysis process.…”

“…As shown in Figure 1c, after Zn plating, the peak located at around 640 cm −1 , which associated with the O�C−O bending of MA molecule weakens and is overwhelmed by the broad peak signal of CH 3 −CO 2 (610 cm −1 ). 32 This implies that MA molecules engage in the hydrolysis process. Meanwhile, at around 1740 cm −1 , a decline of C�O stretching peak belonging to MA can be observed (Figure S3), which indicates that the carbonyl carbon of MA molecule is attacked by generated OH − when the hydrolysis strategy is working.…”

О причинах асимметричности формы контура колебательной полосы ν-=SUB=-1-=/SUB=-(A-=SUB=-1-=/SUB=-) в спектрах комбинационного рассеяния света расплава LiNO-=SUB=-3-=/SUB=-

“…Значительная часть информации о динамических процессах, происходящих в исследуемых системах, содержится в форме контуров спектральных полос [4][5][6][7]. В формирование контура спектральной линии существенные вклады вносят различные релаксационные процессы -переориентация, колебательная релаксация, прямо или косвенно связанные с динамическими взаимодействиями частиц (молекул, молекулярных ионов), вызывающими изменения их колебательных состояний [8,9].…”