Two reintroduced solvatochromic indicators for hydrogen bond donation and acceptance

Abstract

The behaviour of cis‐dicyanodi‐1‐10‐phenanthrolinoiron(II) and acetylacetonato‐N, N,N′,N′‐tetramethylethylene‐diaminocopper(II) perchlorate as solvatochromic indicators for the ability of solvents to donate a hydrogen atom or a pair of electrons, respectively, towards the formation of a hydrogen bond is examined by multivariable linear regressions and principal component analysis.

Interfacial water with special electron donor properties: Effect of water–surfactant interaction in confined reversed micellar environments and its influence on the coordination chemistry of a copper complex

“…Thus, in pure solvents it is known that the [Cu(acac)(tmen)] + structure has the octahedral geometry shown in structure I in the Scheme 2 [1]. Spange et al [7] have studied the solvatochromism of the [Cu(acac)(tmen)] + visible absorption band, and they have demonstrated that the band shifts bathochromically when the electron donor ability of the solvent, measured through the Kamlet and Taft b parameter [10] and/or the Gutman's donor number (DN) [3,14], increases [1,3,15]. For example, a band at k max around 500 nm is observed in the nonelectron-donating dichloroethane, whereas in the strongly electron-donating solvent piperidine, the k max peaks around 686 nm [3,7].…”

Probing the Polarity of Various Cellulose Derivatives with Genuine Solvatochromic Indicators

“…Solvatochromic properties of the indicators Fe(phen) 2 (CN) 2 ,37–41 Michlers ketone,40–42 and 4‐aminobenzophenone22,43 as well as the theoretical background and procedure for the determination of LSE relationships were already reported in detail 9,40,44…”

“…Acceptor numbers ( AN ) of Gutmann17 for solvents are calculated by means of Equation (5) using the solvatochromism of Fe(phen) 2 (CN) 2 39,41 …”

Empirical surface polarity parameters for native polysaccharides

“…(10) [10] as well as into other useful solvent polarity scales such as the acceptor number (AN) and donor number (DN) scale Full Paper: The empirical Kamlet-Taft solvatochromic polarity parameters a, b, and p* as well as calculated Reichardt's E T (30) values are presented for microcristalline cellulose, cellobiose, chitine, amylose, amylopectine, and glycogene. For this purpose, the following solvatochromic polarity indicators were applied: 2,6-diphenyl-4-(2,4,6-triphenyl-1-pyridinio)phenolate (1), [4,Ndimethylamino)benzophenone] (2), dicyano-bis(1,10-phenanthroline) iron(II) [Fe(phen) 2 ](CN) 2 (3), and 4-aminobenzophenone (4).…”