Constitutional dynamic systems of ionic and molecular liquids
作者:Morgan D. Soutullo、Richard A. O’Brien、Kyle E. Gaines、James H. Davis
DOI:10.1039/b901899a
日期:——
The ionic liquids N-methylpyridinium-2-carboxaldehyde Tf2N− and N-methylpyridinium-3-carboxaldehyde Tf2N− form readily-reversible covalent bonds with protic nucleophiles, creating all-liquid constitutionally dynamic materials.
The discovery of pyridinium 1,2,4-triazines with enhanced performance in bioconjugation reactions
作者:Sebastian J. Siegl、Rastislav Dzijak、Arcadio Vázquez、Radek Pohl、Milan Vrabel
DOI:10.1039/c6sc05442k
日期:——
A novel class of pyridinium 1,2,4-triazines with excellent properties for use in bioconjugation reactions was discovered from a systematic kinetic study.
Chromoionophoric calix[4]arenes (8,9) containing dissociable OH and quaternary pyridinium indicator groups have been synthesized. Optical measurements of the target molecules performed in various solvents in the presence of weak base and alkali cations revealed Li+, Na+ and Ca2+ recognition depending on the binding sites. Solvato- and halochromism of betaines 10,11 formed in situ upon complexation