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Are any of the cyanine dyes infrared?

Posted July 27, 2021


No cyanine dyes are infrared, however there two types that are near-infrared:

  • Indole heptamethine cyanine dyes (known as Cy7): This class of cyanine dyes have the ability to generate strong fluorescence emission at the near-infrared (NIR) region of 650nm – 900 nm. It varies largely on the solvent and concentration of the solution.
  • Pyrrolopyrrole cyanine (PPCy) dyes: This class of cyanine dyes have the ability to generate strong fluorescence emission at the near-infrared (NIR) region of 684nm - 864 nm.
Answer

No cyanine dyes are infrared, however there two types that are near-infrared:

  • Indole heptamethine cyanine dyes (known as Cy7): This class of cyanine dyes have the ability to generate strong fluorescence emission at the near-infrared (NIR) region of 650nm – 900 nm. It varies largely on the solvent and concentration of the solution. 
  • Pyrrolopyrrole cyanine (PPCy) dyes: This class of cyanine dyes have the ability to generate strong fluorescence emission at the near-infrared (NIR) region of 684nm - 864 nm.
Additional resources

Pyrrolopyrrole cyanine dyes: a new class of near-infrared dyes and fluorophores

Cyanine 7 bissuccinimidyl ester [equivalent to Cy7® bisNHS ester]

Cyanines