US 10,648,917 B2  28  27  TABLE III-continued  Summary of synthesis and photophysical properties of BPLPs.  Fluorophore  ’-ex  ’-em  E  <l>  Band  Compound 1  Compound 3  Structure  (nm)  (nm)  (M-$^{1 }$cm- 1 )  (%)  Shift  CA  Valine  HO}i~  361  428  5.3  17.5  y  0  CA  3- 0  356  430  6.3  8.8  y  Aminobutanoic  0  {OH  Acid  HOyC(  0  CA  y-Aminobutyric  O  /OH  355  422  4.9  22.1  y  acid  HOY((  0  CA  Propylamine  0)  359  424  6.6  24.6  y  HOyC(  0  CA  Heptylamine  0  356  424  4.7  13.5  y  p~  HO  O  0  CA  Phenylenediamine  ,ONH’  360  433  12.1  4.5  y  0  HO  O  0 