Structural variability in solutions

Variation in IR and Raman Spectra of CD3CN upon Solvation of InCl3in CD3CN: Distinctive Blue Shifts, Coordination Number, Donor-Acceptor Interaction, and Solvated Species

“…The distinctive blue shifts, in contrast to the general trend of bond weakening in donor-acceptor complexation, 8 arise from alleviation of the antibonding characters of the C≡N and C-C bonds, which supplied from the lone electron-pair of the N atom. Especially the C≡N stretching band with its largest variation in vibrational characteristics has been used most often as a probe to determine the compositions of the solvation spheres, 1,2 electrophilicities of Lewis acids, 9,10 solvation numbers, [11][12][13][14][15][16] and acceptor or donor strengths of organic solvents.…”

Oxidative Electrochemical Switching in Dithienylcyclopentenes, Part 1: Effect of Electronic Perturbation on the Efficiency and Direction of Molecular Switching

“…The relationship between DE for the closed forms and solvent acceptor number and dielectric constant (or polarity) was explored, but no clear relationship was observed (see Supporting Information, Table S1). [27] In contrast a relatively good correlation (R 2 = 0.92) was observed between DE and the Guttmann solvent donor number ( Figure 6); DE decreases with increasing solvent donor strength. [27] The relationship between solvent donor number and DE indicates that a significant degree of stabilisation of the monocation 1 Hc + is achieved through solvation.…”

“…[27] In contrast a relatively good correlation (R 2 = 0.92) was observed between DE and the Guttmann solvent donor number ( Figure 6); DE decreases with increasing solvent donor strength. [27] The relationship between solvent donor number and DE indicates that a significant degree of stabilisation of the monocation 1 Hc + is achieved through solvation. As the solvent donor strength decreases, the electron density on the closed form Scheme 2.…”

Synthesis, Characterization, Spectroscopic, and Electrochemiluminescence Properties of a Solvatochromic Azacrown‐Containing Cyanoruthenate(II): Potential Applications in Separation and Indirect Photometric Detection of Cations and Amino Acids in HPLC

“…Acceptor Absorption Emission [a] number [25] l - [b] [a] All are corrected values. The lifetime in different solvents is less than 0.1 ms.…”

“…[24] When the transition energy (E abs ) of the absorption band and 3 MLCT emission energy (E em ) of the complex in different solvents were plotted against the Gutmans acceptor number (AN) [25] of a solvent, a linear relationship [16] was obtained ( Figure 5). In general, the higher the AN of a solvent is, the greater is the blue shift of the MLCT absorption band relative to that in solvents of lower AN; this result is due to the greater interaction between lone pair electrons on the nitrogen atoms of the cyano ligands and the solvent molecules of high AN, resulting in a lowering of s-donating ability as well as an increase in the p-acceptor ability of the …”