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39255

Sigma-Aldrich

4-Dimethylamino-4′-nitrostilbene

≥99.8% (T)

Synonym(s):

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

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About This Item

Linear Formula:
(CH3)2NC6H4CH=CHC6H4NO2
CAS Number:
2844-15-7
Molecular Weight:
268.31
Beilstein:
1379389
MDL number:
MFCD00041877
UNSPSC Code:
12352108
PubChem Substance ID:
57649889
NACRES:
NA.32
Pricing and availability is not currently available.

Assay

≥99.8% (T)

form

solid

mp

256-259 °C (lit.)
256-259 °C

fluorescence

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+

InChI key

NVLSIZITFJRWPY-ONEGZZNKSA-N

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Application

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.

Other Notes

Standard for the correction of emission of fluorescence spectrometers[1]

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H315,H319,H335

Hazard Classifications

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

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
0000413670
0000413670
0000308594
0000189542
1405864V

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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
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
E. Lippert et al.
Z. Anal. Chem., 170, 1-1 (1959)
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
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
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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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