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Merck

39255

Sigma-Aldrich

4-Dimethylamino-4′-nitrostilben

≥99.8% (T)

Synonym(e):

N,N-Dimethyl-4′-nitro-4-stilbenamin, DANS

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500 MG
CHF 133.00

CHF 133.00


Voraussichtliches Versanddatum02. April 2025


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500 MG
CHF 133.00

About This Item

Lineare Formel:
(CH3)2NC6H4CH=CHC6H4NO2
CAS-Nummer:
Molekulargewicht:
268.31
Beilstein:
1379389
MDL-Nummer:
UNSPSC-Code:
12352108
PubChem Substanz-ID:
NACRES:
NA.32

CHF 133.00


Voraussichtliches Versanddatum02. April 2025


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Assay

≥99.8% (T)

Form

solid

mp (Schmelzpunkt)

256-259 °C (lit.)
256-259 °C

Fluoreszenz

λex 500 nm; λem ~700 nm in methylene chloride

SMILES String

CN(C)c1ccc(\C=C\c2ccc(cc2)[N+]([O-])=O)cc1

InChI

1S/C16H16N2O2/c1-17(2)15-9-5-13(6-10-15)3-4-14-7-11-16(12-8-14)18(19)20/h3-12H,1-2H3/b4-3+

InChIKey

NVLSIZITFJRWPY-ONEGZZNKSA-N

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Anwendung

4-Dimethylamino-4′-nitrostilbene (DANS, DMANS) may be used as a proton/acid indicator and physical chemistry probe to study state energy and photoexcitation dynamics of molecules.

Sonstige Hinweise

Standard für die Korrektur der Emission von Fluoreszenz-Spektrometern[1]

Piktogramme

Exclamation mark

Signalwort

Warning

Gefahreneinstufungen

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Zielorgane

Respiratory system

Lagerklassenschlüssel

11 - Combustible Solids

WGK

WGK 3

Flammpunkt (°F)

Not applicable

Flammpunkt (°C)

Not applicable

Persönliche Schutzausrüstung

dust mask type N95 (US), Eyeshields, Gloves


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Slide 1 of 4

1 of 4

I D Petsalakis et al.
The journal of physical chemistry. A, 114(17), 5580-5587 (2010-04-14)
A theoretical investigation on the electronic structure of 4-dimethylamino-4'-nitrostilbene (DANS), 4-(dicyanomethylene)-2-methyl-6-p-(dimethylamino) styryl-4H-pyran (DCM), and their protonated forms is presented in an effort to rationalize recent experimental results on the tuning of the emitted color of organic light-emitting diodes through photochemically
Charles A Schmuttenmaer
Science progress, 85(Pt 2), 175-197 (2002-09-10)
The direct measurement of intramolecular electron transfer through detection of the electromagnetic (EM) waveform that is emitted during this process is reviewed. The waveform is detected in the time-domain via free-space electro-optic sampling and then related to the dynamics of
E. Lippert et al.
Z. Anal. Chem., 170, 1-1 (1959)
Antonio Barbon et al.
Physical chemistry chemical physics : PCCP, 8(43), 5069-5078 (2006-11-09)
Two dyes (4-nitrostilbene, NST and 4-N,N-dimethylamino-4'-nitrostilbene, DANS) included in zeolites with nanometric channels and different Si : Al ratios have been photoexcited and their triplet state studied by time resolved EPR (TR-EPR). This is the first time that a TR-EPR
Takakazu Nakabayashi et al.
Journal of the American Chemical Society, 127(19), 7041-7052 (2005-05-12)
External electric field effects on state energy and photoexcitation dynamics have been examined for para-substituted and unsubstituted all-trans-diphenylpolyenes doped in a film, based on the steady-state and picosecond time-resolved measurements of the field effects on absorption and fluorescence. The substitution

Questions

  1. I am considering using this to detect microplastics on a nitrocellulose membrane. I have read a paper that used DANS. It caused plastics to fluoresce with UV excitation. I am not sure if DANS will also cause the membrane to fluoresce?

    1 answer
    1. This product is not performance tested for any specific application. The end user would have to determine suitability. The Peer Reviewed Papers available for the product do not appear to be specific for plastics. However, the link below is to a publication that may be helpful.

      Identification of microplastics using 4‐dimethylamino‐4′‐nitrostilbene solvatochromic fluorescence
      https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9291063/

      Helpful?

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