“…Remember that fluorophores containing dioxaborinine core have been widely reported; [5–12,26,32–34] nevertheless, those bearing the pyrazolo[1,5‐ a ]pyrimidine ring are rare, although some interesting examples have been reported in our research group [16,17,22,29,35,36] . Fluorophores of extended π‐conjugation ( Py‐DB , R 2 ‐DB , and TPA‐DB 3 ) and with various substitutions such as phenyl ( Ph 2 ‐DB ), methoxyaryl ( Py‐DB , R 2 ‐DB , and Ar‐PP ), TPA ( TPA‐DB , TPA‐DB 3 , and TPA‐PP ), and coumarin ( Cum‐DB ) groups were used in this analysis.…”