Alexa Fluor 594 azide 

Alexa Fluor 594 azide is an azide-modified fluorescent dye and also a FRET acceptor reactant. Owing to its negligible direct absorption under 488 nm excitation light, excellent photostability, and the ability of its azide group to participate in the CuAAC reaction, Alexa Fluor 594 azide can be paired with a donor dye for single-molecule imaging via TIRFM, thereby enabling the visual monitoring of CuNP-catalyzed click reactions^[1].

As a FRET acceptor dye, Alexa Fluor 594 azide is used to verify the heterogeneous catalytic properties of CuAAC click reactions catalyzed by copper nanoparticles (CuNP)^[1].
Guide (The following is our recommended protocol. This protocol is only a guide and should be modified according to your specific needs).
1. Solution preparation: Prepare an aqueous solution of 100 pM Alexa Fluor 594 azide, and mix it with an equal concentration of Alexa Fluor 488 alkyne (FRET donor) and 1 nM triethylamine, where triethylamine serves to accelerate the reaction and protect the catalyst.
2. Reaction system setup: Pump the above mixed solution into a flow cell reactor at a flow rate of 1 mL/h. The reactor substrate is a circular glass coverslip modified with APTES and spin-coated with CuNP, and the coverslip is placed on the objective lens of an Olympus TIRF microscope.
3. Single-molecule imaging detection: Irradiate the reaction system with a 488 nm laser. After removing residual donor emission light from the emitted light using a 550 long-pass filter, an EM-CCD records the signals at a rate of 10 frames/s. The reaction is monitored via bright fluorescence burst signals against a dark background.

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

846.97

C₄₁H₄₆N₆O₁₀S₂

1872449-19-8

Solid

Dark purple to black

[N-]=[N+]=NCCCCCCNC(C1=CC(C([O-])=O)=C(C2=C3C=C(C(CS(=O)(O)=O)=CC(C)(C)N4C)C4=CC3=[O+]C5=CC(N(C(C)(C)C=C6CS(=O)(O)=O)C)=C6C=C25)C=C1)=O

Room temperature in continental US; may vary elsewhere.

4°C, sealed storage, away from moisture and light

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light)

• [1]. Decan MR, et al. Copper nanoparticle heterogeneous catalytic 'click' cycloaddition confirmed by single-molecule spectroscopy. Nat Commun. 2014;5:4612. Published 2014 Aug 11.  [Content Brief]