Infrared spectra of coordinated pyridine

Reduction Characteristics of Ceria under Ethanol Steam Reforming Conditions: Effect of the Particle Size

“…Upon room-temperature adsorption, bands to due molecularly adsorbed pyridine are apparent (C−C bonds at 1038, 1067, 116, 1147, and 1217 cm −1 ; N−CH bond at 1284 cm −1 ). 50 The band at 1441 could be due to molecularly adsorbed pyridine, but it could also represent a pyridinium species over a Bronsted acid site. Over the CeO2-NP sample, the only other major band seen at room temperature is the one at 1595 cm −1 , which can be assigned to H-bonded pyridine.…”

Calculation of Vibrational Spectra of Coordinated Perchlorate Ion in Dipolar Aprotic Solvents

“…Table 1 presents the calculated vibrational frequencies and solvation energies of ClO with T d symmetry and solvation energies E s that were calculated by any of the three methods were practically independent of the nature of the DAS. This indicated that the anion was weakly solvated, which agreed with experimental studies of the vibrational spectrum of the anion in highly dilute LiClO 4 solutions in DAS [1][2][3][4][5][6][7][8][9][10][11][12]. The solvation energies E s , dispersion component of the solvation energy E d , and total contribution to the solvation energy of the non-electrostatic component E non-el of − 4 ClO in DAS were calculated.…”

“…This was related to its greater polarizing ability and, as a result, the greater perturbing effect on the spectrum of − 4 ClO . According to IR spectroscopy [3], the experimental frequency differences ν 7 (B 1 ) -ν 1 (A 1 ) were 40, 54, and 80 cm -1 in solutions of Na, Li, and Mg perchlorates in Ac upon lifting the degeneracy of ν 3 (F 2 ) of the anion with T d symmetry as a result of forming the CIP. Calculations by the ClO was most evident in the spectrum of NaClO 4 solutions in DAS ( Table 3).…”

“…Differences in vibrational spectra of free anions and those coordinated to cations are widely used to study ion-ion interactions in electrolyte solutions in dipolar aprotic solvents (DAS). IR spectroscopic evidence of perchlorate coordination by Li + , Na + , and Mg 2+ in contact-ion pairs (CIP) in acetonitrile (AN) [1], pyridine (Py) [2], and acetone (Ac) [3] was obtained. Bands due to anion vibrations in CIP and ionic trios and quartets were observed in IR spectra of…”

Infrared and Raman Spectroscopic Study of Ion Pairing of Strontium(ii) and Barium(ii) by Thiocyanates in Liquid Ammonia

“…The alkali metal thiocyanates have been studied in some detail in aqueous media [7,8] in dimethylacetamide [9], dimethyl formamide (DMF) [10][11][12] and liquid ammonia [13,14] and a variety of structurally different ion associates have been identified. In several non-aqueous solutions the species participating in the equilibria are 1:1 contact ion pairs, outer-sphere ion pairs and "free" SCN -anion.…”