Coumarin343isablueemittingfluorophorewithanemissionmaximumaround480nm.ThisdyeformsaFRETpairwithfluorescein,andcanharvestbluelightenergyforthesubsequenttransfertootherfluorophores.
Theazidederivativecanbeconjugatedwithalkynesinacopper-catalyzedandcopper-freeClickchemistryreactions.Themoleculecontainsalongaminohexanoyllinkerthatprovidesseparationbetweenthedye,andtheazidefunction.
Generalproperties
| Appearance: | yellowsolid | 
| MassspecM+increment: | 480.3 | 
| Molecularweight: | 480.56 | 
| Molecularformula: | C25H32N6O4 | 
| IUPACname: | 5-{[6-(3-Azidopropylamino)-6-oxohexylamino]carbonyl}-3-oxa-13-azatetracyclo[7.7.1.02,7.013,17]heptadeca-1,5,7,9(17)-tetraen-4-one | 
| Solubility: | goodinDMF,DMSO | 
| Qualitycontrol: | NMR1H,HPLC-MS(95%) | 
| Storageconditions: | Storage:24monthsafterreceivalat-20°Cinthedark.Transportation:atroomtemperatureforupto3weeks.Avoidprolongedexposuretolight.Desiccate. | 
Spectralproperties
| Excitationmaximum,nm: | 437 | 
| ε,L⋅mol−1⋅cm−1: | 44000 | 
| Emissionmaximum,nm: | 477 | 
| Fluorescencequantumyield: | 0.63 | 
| CF260: | 0.29 | 
| CF280: | 0.24 |