1292301-88-2

Upstream product

• 97-51-8 5-Nitrosalicylaldehyde 
• 5418-63-3 1,2,3,3-tetramethyl-3H-indolium iodide 
• 16650-15-0 2-(2-hydroxy-5-nitro-styryl)-1,3,3-trimethyl-3H-indolium betaine 
• 10442-39-4 tetra-n-butylammonium cyanide 
• 57-12-5 cyanide^(1-) 
• 1498-88-0 1,3',3'-trimethyl-6-nitrospiro(indoline-2,2'-[2H]benzopyran) 

Downstream Products

• 1498-88-0 1,3',3'-trimethyl-6-nitrospiro(indoline-2,2'-[2H]benzopyran) 

Relevant academic research and scientific papers

Spiropyran as a selective, sensitive, and reproducible cyanide anion receptor

A spiropyran derivative (1) behaves as a selective and sensitive cyanide anion receptor in aqueous media under UV irradiation. The receptor can be reproduced just by irradiation with visible light.

An off-the-shelf sensor for colourimetric detection of sulfide

The cheap, accessible spiropyran nitroBIPS is a sensitive, selective colourimetric sensor for quantitative determination of sulfide in aqueous media at neutral pH.

Rapid colorimetric sensing of cyanide anion in aqueous media with a spiropyran derivative containing a dinitrophenolate moiety

A spiropyran derivative containing a dinitrophenolate moiety (2: 1′,3′,3′-trimethyl-6,8-dinitro-spiro-[2H-1-benzopyran-2, 2′-indoline]) behaves as a receptor for selective detection of cyanide anion (CN-) in aqueous media. Compound 2, when dissolved in aqueous media, spontaneously produces the spirocycle-opened merocyanine (MC) form even in dark condition. The absorption band of the MC form decreases selectively upon addition of CN-, via a nucleophilic addition of CN- to the spirocarbon of the MC form. The nucleophilic addition occurs very rapidly (within 1 min) and enables rapid and selective quantification of very low levels of CN- (>0.8 μM) by an absorption analysis.