Indolizine-squaraines are a class of near-infrared emitting materials with potential in many practical settings. One application of interest is biological imaging dyes due to this class of molecules’ unique qualities of being water soluble, absorbing and emitting in the therapeutic window (700 nm – 1400 nm), having a large Stokes shift, and having a high quantum yield. The large Stokes shift gives these molecules the most potential and it can be modified by changing the R-group substituents to achieve the most desirable result. The tuneability of this molecular class was investigated by taking the absorption and emission spectrum of each molecule in solution and solid state. The photophysical properties of this class of molecules will be presented as studied using the following techniques: ultraviolent/visible absorption spectroscopy, emission spectroscopy, infrared spectroscopy, fluorometry, and diffuse reflectance.

Investigating the photophysical properties of indolizine-squaraines

253rd National Meeting (2017)

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