1,8-Diazafluoren-9-one

1,8-Diazafluoren-9-one
Names
	IUPAC name 9H-pyrido[3',2':3,4]cyclopenta[1,2-b]pyridin-9-one
	Other names DFO; 9H-1,8-Diazafluoren-9-one; 9H-Cyclopenta[1,2-b:4,3-b']dipyridin-9-one
Identifiers
CAS Number	54078-29-4;
3D model (JSmol)	Interactive image; Interactive image;
ChemSpider	633891 ;
PubChem CID	725961;
CompTox Dashboard (EPA)	DTXSID10352406 ;
	InChI InChI=1S/C11H6N2O/c14-11-9-7(3-1-5-12-9)8-4-2-6-13-10(8)11/h1-6H Key: FOSUVSBKUIWVKI-UHFFFAOYSA-N ; InChI=1/C11H6N2O/c14-11-9-7(3-1-5-12-9)8-4-2-6-13-10(8)11/h1-6H Key: FOSUVSBKUIWVKI-UHFFFAOYAH;
	SMILES O=C1C3=C(C=CC=N3)C2=C1N=CC=C2; O=C3c1ncccc1c2c3nccc2;
Properties
Chemical formula	C11H6N2O
Molar mass	182.18 g/mol
Melting point	229 to 233 °C (444 to 451 °F; 502 to 506 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

1,8-Diazafluoren-9-one, also known as DFO, is a chemical that is used to find fingerprints on porous surfaces. It makes fingerprints glow when they are lit by blue-green light.

DFO reacts with amino acids present in the fingerprint to form highly fluorescent derivatives. Excitation with light at ~470 nm results in emission at ~570 nm.^[1]

References

^ Pounds, C. Anthony; Grigg, Ronald; Mongkolaussavaratana, Theeravat (1 January 1990). "The Use of 1,8-Diazafluoren-9-one (DFO) for the Fluorescent Detection of Latent Fingerprints on Paper. A Preliminary Evaluation". Journal of Forensic Sciences. 35 (1): 169–175. doi:10.1520/JFS12813J.

External links

RCMP report on 1,8-diazafluoren-9-one

[1] Pounds, C. Anthony; Grigg, Ronald; Mongkolaussavaratana, Theeravat (1 January 1990). "The Use of 1,8-Diazafluoren-9-one (DFO) for the Fluorescent Detection of Latent Fingerprints on Paper. A Preliminary Evaluation". Journal of Forensic Sciences. 35 (1): 169–175. doi:10.1520/JFS12813J.

[1]

Names

IUPAC name 9H-pyrido[3',2':3,4]cyclopenta[1,2-b]pyridin-9-one
Other names DFO 9H-1,8-Diazafluoren-9-one 9H-Cyclopenta[1,2-b:4,3-b']dipyridin-9-one
Identifiers
CAS Number	54078-29-4
3D model (JSmol)	Interactive image Interactive image
ChemSpider	633891
PubChem CID	725961
CompTox Dashboard (EPA)	DTXSID10352406
InChI InChI=1S/C11H6N2O/c14-11-9-7(3-1-5-12-9)8-4-2-6-13-10(8)11/h1-6H Key: FOSUVSBKUIWVKI-UHFFFAOYSA-N InChI=1/C11H6N2O/c14-11-9-7(3-1-5-12-9)8-4-2-6-13-10(8)11/h1-6H Key: FOSUVSBKUIWVKI-UHFFFAOYAH
SMILES O=C1C3=C(C=CC=N3)C2=C1N=CC=C2 O=C3c1ncccc1c2c3nccc2
Properties
Chemical formula	C₁₁H₆N₂O
Molar mass	182.18 g/mol
Melting point	229 to 233 °C (444 to 451 °F; 502 to 506 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).