A fluorescent monomer selected from the group consisting of compounds Formula I or Formula II, wherein: in Formula I, Y is selected from H, F, Cl, Br, NO 2, CO 2 H and its salts, PO 3 H 2 and it salts, SO 3 H and its salts, SO 2 NH 2 or SO 2 NR 2; Z is one of the following: CH 2, C=O, CR 2, NH, NR 1, NH 2 +, NR 2 +, NOH, O, S, SO, or SO 2; R 1 and R 2 are alkyl; R 3 is selected from allyl, 2-hydroxy-3-allyloxy-propyl, vinyl benzyl, 3-methacrylamidopropyl, 3-acrylamidopropyl, 2-acryloxyethyl or 2-methacryloxyethyl; A is absent or selected from alkyl, alkyloxyalkyl, alkylamidoalkyl, or aryl; with the proviso that when A is absent, B is nitrogen and B is bonded directly to the imide nitrogen; B is sulfur or nitrogen with the proviso that when B is sulfur only one of R 1 or R 2 is present; X is an anionic counter ion, in Formula II, Y is selected from H, F, Cl, Br, NO 2, CO 2 H and its salts, PO 3 H 2 and it salts, SO 3 H and its salts, SO 2 NH 2 or SO 2 NR 2; Z is one of the following: CH 2, C=O, CR 2, NH, NR 1, NH 2 +, NR 2 +, NOH, SO, or SO 2; A is absent or selected from alkyl, alkyloxyalkyl, alkoxy, alkylamidoalkyl, alkylamino, NH, or aryl; R 4 is selected from allyl, acryl, methacryl, 2-hydroxy-3-allyloxy-propyl, vinyl benzyl, or 2-methacryloxyethyl. in Formula I, Y is selected from H, F, Cl, Br, NO 2, CO 2 H and its salts, PO 3 H 2 and it salts, SO 3 H and its salts, SO 2 NH 2 or SO 2 NR 2; Z is one of the following: CH 2, C=O, CR 2, NH, NR 1, NH 2 +, NR 2 +, NOH, O, S, SO, or SO 2; R 1 and R 2 are alkyl; R 3 is selected from allyl, 2-hydroxy-3-allyloxy-propyl, vinyl benzyl, 3-methacrylamidopropyl, 3-acrylamidopropyl, 2-acryloxyethyl or 2-methacryloxyethyl; A is absent or selected from alkyl, alkyloxyalkyl, alkylamidoalkyl, or aryl; with the proviso that when A is absent, B is nitrogen and B is bonded directly to the imide nitrogen; B is sulfur or nitrogen with the proviso that when B is sulfur only one of R 1 or R 2 is present; X is an anionic counter ion, Z is one of the following: CH 2, C=O, CR 2, NH, NR 1, NH 2 +, NR 2 +, NOH, O, S, SO, or SO 2; R 1 and R 2 are alkyl; R 3 is selected from allyl, 2-hydroxy-3-allyloxy-propyl, vinyl benzyl, 3-methacrylamidopropyl, 3-acrylamidopropyl, 2-acryloxyethyl or 2-methacryloxyethyl; A is absent or selected from alkyl, alkyloxyalkyl, alkylamidoalkyl, or aryl; with the proviso that when A is absent, B is nitrogen and B is bonded directly to the imide nitrogen; B is sulfur or nitrogen with the proviso that when B is sulfur only one of R 1 or R 2 is present; X is an anionic counter ion, in Formula II, Y is selected from H, F, Cl, Br, NO 2, CO 2 H and its salts, PO 3 H 2 and it salts, SO 3 H and its salts, SO 2 NH 2 or SO 2 NR 2; Z is one of the following: CH 2, C=O, CR 2, NH, NR 1, NH 2 +, NR 2 +, NOH, SO, or SO 2; A is absent or selected from alkyl, alkyloxyalkyl, alkoxy, alkylamidoalkyl, alkylamino, NH, or aryl; R 4 is selected from allyl, acryl, methacryl, 2-hydroxy-3-allyloxy-propyl, vinyl benzyl, or 2-methacryloxyethyl. Z is one of the following: CH 2, C=O, CR 2, NH, NR 1, NH 2 +, NR 2 +, NOH, SO, or SO 2; A is absent or selected from alkyl, alkyloxyalkyl, alkoxy, alkylamidoalkyl, alkylamino, NH, or aryl; R 4 is selected from allyl, acryl, methacryl, 2-hydroxy-3-allyloxy-propyl, vinyl benzyl, or 2-methacryloxyethyl.