Cyanine3tetrazineisafluorescentdyebearingtetrazinemoietyforaconjugationreactioncalledTCO(trans-cyclooctene)ligation.Actually,tetrazinesreactnotonlywithtrans-cyclooctenes,butalsowith(methyl)cyclopropenesandstrainednon-benzo-fusedcycloalkynes.
Cyanine3isamoderatelyhydrophobicdye,enablinglabelinginnon-aqueousenvironmentaswellasinaqueousmediacontainingsomeorganicco-solventlikeacetonitrileorDMSO.Forreactionsinpurelyaqueousmedia,asulfonatedversionofthisreagentisavailable.
Generalproperties
| Appearance: | darkredsolid |
| MassspecM+increment: | 611.4 |
| Molecularweight: | 727.64 |
| Molecularformula: | C40H46N7BF4O |
| Solubility: | goodinDCM,DMSO,DMF |
| Qualitycontrol: | NMR1H,HPLC-MS(95%) |
| Storageconditions: | Storage:24monthsafterreceivalat-20°Cinthedark.Transportation:atroomtemperatureforupto3weeks.Avoidprolongedexposuretolight.Desiccate. |
Spectralproperties
| Excitationmaximum,nm: | 555 |
| ε,L⋅mol−1⋅cm−1: | 150000 |
| Emissionmaximum,nm: | 570 |
| Fluorescencequantumyield: | 0.31 |
| CF260: | 0.04 |
| CF280: | 0.09 |