Sulfo-Cyanine7.5isaheptamethynecyaninedyeforthenearinfraredregionofthespectrum,whichisveryhydrophilic,andwatersoluble.ThefluorophoreresemblesICG(indocyaninegreen)thathasalonghistoryofinvivouse,andisevenapprovedforhumanangiography.However,comparedtoICG,sulfo-Cyanine7.5hasasignificantlyimprovedfluorescencequantumyieldduetotheruggedpolymethinechainreinforcedwithtrimethylenebridge.
Sulfo-Cyanine7.5isavailableasanumberofreactivederivatives.Thisazidecanbeusedfortheeasylabelingofvariousbiomoleculesbycopper-catalyzedorcopperfreeClickchemistry.
Generalproperties
| Appearance: | darkcoloredsolid |
| MassspecM+increment: | 1050.3 |
| Molecularweight: | 1165.51 |
| Molecularformula: | C48H51N6K3O13S4 |
| Solubility: | goodinwater,DMSO,DMF |
| Qualitycontrol: | NMR1H,HPLC-MS(95%) |
| Storageconditions: | Storage:24monthsafterreceivalat-20°Cinthedark.Transportation:atroomtemperatureforupto3weeks.Avoidprolongedexposuretolight.Desiccate. |
Spectralproperties
| Excitationmaximum,nm: | 778 |
| ε,L⋅mol−1⋅cm−1: | 222000 |
| Emissionmaximum,nm: | 797 |
| CF260: | 0.09 |
| CF280: | 0.09 |