Micellar catalysis in the systems arylamine-diphenylamine-NO 2 −
作者:S. Yu. Doronin、R. K. Chernova
DOI:10.1134/s1070363208110066
日期:2008.11
By methods of UV and IR spectroscopy and thermogravimetry reactions of diazotizaion and azo coupling were studied in the systems of primary arylamine (p-nitro-, p-carboxy- and p-sulfoaniline)- diphenylamine -nitrite ion in water and micellar media on the basis of surfactants. The micellar catalysis effect of sodium dodecylsulfate in the micellar media was revealed. Rate of diazotization was shown to be independent of the surfactants of various types. Formation of ionic associates of azo dyes with dodecylsulfate anions in premicellar region was established and physicochemical characteristics of the associates were estimated.
Electronic Spectra of Push-Pull 4-Phenylaminoazobenzene Derivatives
作者:Shohei Makita、Ayako Saito、Makoto Hayashi、Shohei Yamada、Koji Yoda、Joe Otsuki、Toshio Takido、Manabu Seno
DOI:10.1246/bcsj.73.1525
日期:2000.7
4-phenylaminoazobenzene derivatives bearing an electron-withdrawing 4′-substituent were probed by electronicspectra in solution. The visible absorption maxima of these azobenzenes were correlated with the solvent parameters through the McRae theory as well as the solvent donor numbers. While the absorption spectra of these neutral species were solvent-dependent, those of protonated species were almost solvent
Structure–Uptake Relationship Study of DABCYL Derivatives Linked to Cyclic Cell‐Penetrating Peptides for Live‐Cell Delivery of Synthetic Proteins
作者:Abhishek Saha、Shaswati Mandal、Jan Vincent V. Arafiles、Jacobo Gómez‐González、Christian P. R. Hackenberger、Ashraf Brik
DOI:10.1002/anie.202207551
日期:2022.11.21
Modifying cyclic cell-penetrating peptides with DABCYL derivatives can enhance the formation of nucleation zones for small fluorescent cargoes. Structure variations of the DABCYL moiety significantly increased the cellular uptake efficiency of ubiquitin, resulting in efficient cytosolic transport at nanomolar concentrations.