36232-80-1

Upstream product

• 3119-93-5 N-ethyl-2-methylbenzothiazolium iodide 
• 123-08-0 4-hydroxy-benzaldehyde 
• 120-75-2 2-Methylbenzothiazole 
• 1314880-42-6 C₃₃H₃₄NOSSi⁽¹⁺⁾*I^(1-) 

Relevant academic research and scientific papers

Synthesis of highly selective lysosomal markers by coupling 2-(2′-hydroxyphenyl)benzothiazole (HBT) with benzothiazolium cyanine (Cy): the impact of substituents on selectivity and optical properties

HBT-Cy 1 has been previously reported as a highly selective fluorescent probe for lysosome visualization in live cells. To further investigate the role of the structural components of HBT-Cy in lysosome selectivity, cyanine based fluorescent probe series

Fluorescent bio-nanocomposites based on chitosan reinforced hemicyanine dye-modified montmorillonite

The present investigation describes the synthesis and detailed characterization of novel fluorescent bio-nanocomposite films of chitosan reinforced by hemicyanine dye-modified montmorillonite (MMT-HD) using a solvent-casting method. A series of hemicyanine dyes (HD) have been synthesized by catalyst-free and solvent-free conditions in high yields. These organic compounds were intercalated within the interlayer gallery of montmorillonite providing an increase in the basal spacing and affording inorganic-organic host-guest materials. The fundamental properties of these dyes as well as their intercalated MMT were studied by X-ray, FTIR, and thermal analysis, completed by photophysical properties studies. The results showed that the guest species (HD) are successfully intercalated and stacked as J-aggregates (head-to-tail aggregates) into the host layer of MMT, which is confirmed by spectral characterization. Improvement in thermal stability of the intercalated MMT was indicated by results from thermal analysis compared to the pure dye. Next, the resulting organo-modified clays were dispersed within the chitosan biopolymer. The obtained bio-films were investigated and characterized with varying content of clay (1, 2, 5 and 10 wt%). The structural, hygroscopic (hydrophobicity and water solubility) and fluorescence properties of the resulting materials were evaluated. Results demonstrate that the incorporation of MMT-HD into chitosan improves the hygroscopic properties of the chitosan film, thus showing potential for active food packaging materials. In addition, the solid state fluorescence spectra of the bio-films have shown a significant fluorescence emission at room temperature with increasing clay content.

A highly selective colorimetric and ratiometric fluorescent chemodosimeter for imaging fluoride ions in living cells

A simple but highly selective colorimetric and ratiometric fluorescent chemodosimeter was designed and synthesized to detect fluoride ions (F -) in aqueous solution and living cells by virtue of the strong affinity of F- toward silic

The synthesis and the solvent and substituent effect on the spectroscopic characteristic of 3-ethyl-2-(p-substitued styryl)benzothiazolium iodides

The photophysical and photochemical properties of p-substitued 2-styryl-ethylbenzothiazolium iodides, possessing different electron-withdrawing or electron-donating groups are described. The dyes were prepared by the condensation of 3-ethyl-2-methylbenzothiazole salts with p-substituted benzaldehydes. The synthesis of suitable substrates is presented as well. We describe here the absorption, emission spectra and the luminescence quantum yield of hemicyanine dyes (SH) measured in 11 different organic solvents of varying polarity. Molecular structure of the synthesized dyes was established by 1H NMR, electronic absorption and fluorescence spectrometry. The spectral data confirmed that all the compounds exist in E-configuration of their styryl residues. The planar molecular conformation is typical for the compounds with five-membered side aromatic moieties (for example benzothiazole). The compounds possessing N-alkyl substituent in phenyl ring, in contrast to the compounds with other substituents, exhibit low fluorescence quantum yield in THF solution. This indicates that for N-alkyl derivatives the non-radiative processes are much more effective than the radiative ones. The electronic absorption and fluorescence emission spectra of tested dyes demonstrate high sensitivity to the nature of substituent introduced into the aromatic ring.