Serguei Miltsov

Nortricarbocyanines: New near-infrared pH-indicators

Abstract A one step synthesis of new acidochromic indolenine-based cyanine dyes is presented. The dyes obtained have absorbance maxima at 780–805nm and expose spectral changes in pH-range from 6 to 2.

Novel synthesis of ketocyanine dyes

Abstract New one-step synthesis of ketocyanine dyes is presented. The dyes obtained expose spectral changes in pH range from 1.7 to 4.3 and their protonated forms absorb at 715–750 nm.

New cyanine dyes: Norindosquarocyanines

Abstract Synthesis of new acidochromic-based dyes is presented. The dyes obtained have acid absorbance maxima at 640–700 nm and expose spectral changes in the pH-range from 8 to 12.

Croconines: new acidochromic dyes for the near infrared region

Abstract The synthesis and characterization of new nor-indocrococyanine dyes are described. The acid form of the obtained dyes has an absorbance maxima in the 759–800 nm range. They present spectral changes at pH 6.5–9.7.

Boron trifluoride-methanol complex-mild and powerful reagent for deprotection of labile acetylated amines

A set of amino-group possessing cyanine dyes is obtained from their N-acetyl derivatives via deprotection with boron trifluoride–methanol complex in good yields.