Approach to a Substituted Heptamethine Cyanine Chain by the Ring Opening of Zincke Salts
作者:Lenka Štacková、Peter Štacko、Petr Klán
DOI:10.1021/jacs.9b02537
日期:2019.5.1
Cyaninedyes play an indispensable and central role in modern fluorescence-based biological techniques. Despite their importance and widespread use, the current synthesismethods of heptamethine chain modification are restricted to coupling reactions and nucleophilic substitution at the meso position in the chain. Herein, we report the direct transformation of Zincke salts to cyaninedyes under mild
Photo- and Thermochromic Spiropyrans 42.* The Effect of Structural Factors on the Photochromic Properties of Indolinospiro-Pyrans Containing a Condensed Furan Fragment
作者:R. V. Tyurin、B. S. Lukyanov、A. V. Chernyshev、G. S. Borodkin、K. N. Khalanskii、L. V. Chepeleva、M. B. Lukyanova
DOI:10.1007/s10593-014-1528-x
日期:2014.8
the benzopyran part of the molecule. The structure of these compounds was established by IR and multinuclear NMR spectroscopy. A study was carried out on the effect of the fused benzene ring and bulky N-benzyl substituent on the photochromic properties of these compounds in solution and in a polymer matrix. Dynamic NMR spectroscopy was used to study the thermally induced isomerization of the N-benzyl
Heptamethinecyanines (Cy7) are fluorophores essential for modern bioimaging techniques and chemistry. Here, we systematically evaluated the photochemical and photophysical properties of a library of Cy7 derivatives containing diverse substituents in different positions of the heptamethine chain. A single substitution allows modulation of their absorption maxima in the range of 693–805 nm and photophysical