AderivativeofCyanine5red-emittingfluorophorepossessingDBCO(dibenzocyclooctyne,alsoknownasADIBO,azodibenzocyclooctyne)groupforcopperfreeClickchemistry.
Strainedcycloalkynes,suchascyclooctynes,reactwithazidesveryrapidlyintheabsenceofcoppercatalystinastrainpromotedalkyneazidecycloaddition(spAAC).Thisreactionisveryfast,mild,andbiocompatIBLe.
Comparedtoothercycloalkynes,DBCOprovideamongthefastestreactionkinetics,stillpossessinggoodstABIlity.
Generalproperties
| Appearance: | darkbluesolid | 
| MassspecM+increment: | 928.4 | 
| Molecularweight: | 929.03 | 
| Molecularformula: | C53H59N4F6O2P | 
| Solubility: | goodinDMF,DMSO,chlorinatedorganicsolvents | 
| Qualitycontrol: | NMR1H,HPLC-MS(95%) | 
| Storageconditions: | Storage:12monthsafterreceivalat-20°Cinthedark.Transportation:atroomtemperatureforupto3weeks.Avoidprolongedexposuretolight.Desiccate. | 
Spectralproperties
| Excitationmaximum,nm: | 646 | 
| ε,L⋅mol−1⋅cm−1: | 250000 | 
| Emissionmaximum,nm: | 662 | 
| Fluorescencequantumyield: | 0.2 | 
| CF260: | 0.03 | 
| CF280: | 0.04 |