Merocyanine

Merocyanine I
Names

IUPAC name sodium 3-[(2Z)-2-[(E)-4-(1,3-Dibutyl-2,4,6-trioxo-5-hexahydropyrimidinylidene)but-2-enylidene]-1,3-benzoxazol-3-yl]propane-1-sulfonate
Identifiers
CAS Registry Number	58823-12-4^Y
ChemSpider	4941661^N
InChI InChI=1S/C26H33N3O7S.Na/c1-3-5-16-28-24(30)20(25(31)29(26(28)32)17-6-4-2)12-7-10-15-23-27(18-11-19-37(33,34)35)21-13-8-9-14-22(21)36-23;/h7-10,12-15H,3-6,11,16-19H2,1-2H3,(H,33,34,35);/q;+1/p-1/b10-7+,23-15-;^N Key: DZVCFNFOPIZQKX-LTHRDKTGSA-M^N InChI=1/C26H33N3O7S.Na/c1-3-5-16-28-24(30)20(25(31)29(26(28)32)17-6-4-2)12-7-10-15-23-27(18-11-19-37(33,34)35)21-13-8-9-14-22(21)36-23;/h7-10,12-15H,3-6,11,16-19H2,1-2H3,(H,33,34,35);/q;+1/p-1/b10-7+,23-15-; Key: DZVCFNFOPIZQKX-GKJXPYBMBR
Jmol-3D images	Image
PubChem	23678802
SMILES CCCCN1C(=O)C(=C/C=C/C=C\2/N(c3ccccc3O2)CCCS(=O)(=O)[O-])C(=O)N(C1=O)CCCC.[Na+]
Properties
Chemical formula	C₂₆H₃₂N₃NaO₇S
Molar mass	553.60 g/mol
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
N verify (what is: Y/N?)
Infobox references

Merocyanines are a class of fluorescent dyes typified by merocycanine I.

These dyes are usually intensely colored and have large extinction coefficients.

Merocyanine 540 was the first fluorescent dye used for measuring membrane potential,^[1] while Brooker's merocyanine and related compounds are notable for their solvatochromatic properties.

Merocyanine 540 differs from merocyanine I by the replacement of an oxygen atom with a sulfur atom

References