Pyrenebutyric acid NHS ester|114932-60-4 Pyrene is a polyaromatic hydrocarbon which exhibits fluorescence in blue range of the spectrum. When two pyrene residues are closely spaced, excimer fluorescence is observed at longer wavelength. Therefore, pyrene is useful as a proximity label. Pyrene exhibits affinity to graphite, and can be used as an anchor group for graphite. This reagent can be conjugated with biomolecules for their subsequent immobilization on graphite surfaces. This NHS ester allows to label biomolecules with amino groups, such as proteins, peptides, amino-DNA and other molecules. Pyrene is also a FRET donor for perylene.                 General properties： Appearance: off-white solid Mass spec M+ increment: 270.1 Molecular weight: 385.41 CAS number: 114932-60-4 Molecular formula: C24H19NO4 Solubility: good in DCM, chloroform, moderate in DMF, DMSO, low in water Quality control: NMR 1H, HPLC-MS (95%) Storage conditions: Storage: 12 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Avoid prolonged exposure to light. Desiccate. Spectral properties： Excitation maximum, nm: 343; 326; 313; 276; 265; 242; 234 Emission maximum, nm: 377; 397   Pyrenebutyric acid NHS ester|114932-60-4 N-羟基琥珀酰亚胺脂Dye NHS esters Pyrenebutyric acid NHS ester ROX NHS ester, pure 6- isomer BDP FL NHS ester FAM NHS ester Cyanine3 NHS ester Cyanine3.5 NHS ester Cyanine5 NHS ester Cyanine5.5 NHS ester Cyanine7 NHS ester Cyanine7.5 NHS ester Sulfo-Cyanine3 NHS ester Sulfo-Cyanine5 NHS ester sulfo-Cyanine5 bis-NHS ester Sulfo-Cyanine7 NHS ester