20399-10-4Relevant academic research and scientific papers
Photo-/Baso-Chromisms and the Application of a Dual-Addressable Molecular Switch
Liu, Danyang,Yu, Binhong,Su, Xing,Wang, Xiaojun,Zhang, Yu-Mo,Li, Minjie,Zhang, Sean Xiao-An
, p. 2838 - 2845 (2019)
Two typical molecular switches of spiropyran (SP) and benzoxazine (OX) were fused by sharing an indole to achieve a new dual-addressable molecular switch (SP-OX-NO2). Through proper molecular modification with NO2, the transformation
STERIC FACTORS IN THE SHORT-RANGE SOLVATION OF SECONDARY AMINES
Tayh, Jamal A.,Scott, Ronald M.
, p. 297 - 305 (2007/10/02)
Steric aspects of the short-range solvation of proton transfer complexes between 2,4-dinitrophenol and various secondary amines was studied in benzene-DMSO and benzene-dioxane mixed solvent systems.Diisopropylamine was hindered when compared with diethylamine, and 2,2,6,6-tetramethylpiperidine was hindered when compared with 2,6-dimethylpiperidine in forming the proton transfer complex.The smaller electron-donating solvent dimethylsulfoxide was capable of solvating the more hindered amines, but the the bulkier dioxane could only solvate diethylamine and dimethylpiperidine readily.Tetrahydropyran could solvate tetramethylpiperidine weakly, inferring that it did not solvate in precisely the same fashion as does dioxane.It is concluded that the solvation structure is sufficiently crowded as to be sensitive to small changes in the structures of the participants.
Amine basicities in benzene and in water
Frenna, Vincenzo,Vivona, Nicolo,Consiglio, Giovanni,Spinelli, Domenico
, p. 1865 - 1868 (2007/10/02)
The constants for ion-pair formation with 2,4-dinitrophenol in benzene (KB), the pKa values in water, of thirty-three amines have been measured.According to the class of amine, two different situations can be observed: for primary amines and secundery cyclic amines, the effects of structural variations on basicity are higher in water than in benzene; on the other hand, for tertiary amines these effects are similar in the two solvents.KB Values of primary amines give a good correlation with ? *.The Tatf and Hancock equation allows a unifying treatment of KB values of the various classes of amines.
