Pyrromethene

File:Pyrromethene dyes general.svg

Pyrromethene is a dye used in solid-state dye lasers.{{cite journal |title=Laser properties of pyrromethene dyes in sol–gel glasses |doi=10.1016/S0925-3467(99)00010-5 |year=1999 |last1=Yariv |first1=E |last2=Reisfeld |first2=R |journal=Optical Materials |volume=13 |issue=1 |pages=49–54 |bibcode = 1999OptMa..13...49Y }}{{cite journal |title=Structural, photophysical and lasing properties of pyrromethene dyes | doi = 10.1080/01442350500270551 |bibcode = 2005IRPC...24..339A |year=2005 |last1=López Arbeloa |first1=F. |last2=Bañuelos |first2=J. |last3=Martínez |first3=V. |last4=Arbeloa |first4=T. |last5=López Arbeloa |first5=I. |journal=International Reviews in Physical Chemistry |volume=24 |issue=2 |pages=339| s2cid = 97092366 }} As a structural motif it is similar to the naturally occurring tetrapyrrole class of compounds.