Patent ID: 8617827
Filing Date: 2013-12-31
Classification: C09B

Abstract:
1. Photoactivable rhodamine or carbopyronine derivative compounds of the following general formulae G1-G4 comprising UV light absorbing chromophores which are adapted to eliminate nitrogen or nitrogen(I) oxide and generate fluorescent rhodamine or carbopyronine dyes when subjected to photolysis by irradiation at 254-490 nm G1: A1=O, A2=N, A3=C; G2: A1=S, A2=N, A3=C; G3: A1=O, A2=O, A3=N; G4: A1=S, A2=O, A3=N; wherein R a chemical bond between C-2 and C-3 is a single or cis-double bond; alternatively, C-2 and C-3 is a part of any cyclic system; and at least one of the substituents Q and L is independently defined as follows (n=0, 1, 2, 3 or 4): H, COOR wherein R