Fluorescent polymers and solutions thereof for scale control in aqueous systems

A fluorescent monomer of Structure I which is substantially free of Structure II, wherein Structure I comprises rings A and B and optionally rings C and/or D:

• wherein
• R1 is H, alkyl, aryl, arylalkyl, aryloxy, NH2, NHalkyl, N(alkyl)2, =NH+alkyl X−, ═N(alkyl)2X−, ═NH2+X−, (meth)acryloyloxy, vinylaryl, vinylarylalkyl, vinylaryloxy, vinylarylalkyloxy, (meth)allyl, (meth)allyloxy, (meth)acryloxy, (meth)acryloxyalkyl, (meth)acryloxypolyalkylene oxide, (meth)allylamino, (meth)acrylamido, polyalkylene oxide, oxo, OH, O−M+, alkoxy, CnH2n+1CH═CH-alkylene-, CnH2n+1CH═C(CH3)-alkylene-, CnH2n+1CH═CH-alkylene-O—, CnH2n+1CH═C(CH3)-alkylene-O—, —COOH, -alkylene-COOH, —COO−M+, -alkylene-COO−M+, or —O-alkylene-(meth)acrylate;
• R2 is H or alkyl;
• R3 is H, alkyl, aryl, arylalkyl, aryloxy, (meth)allyl, (meth)allylamino, (meth)allyloxy, (meth)allyloxyalkoxide, (meth)acryloyloxy, ((meth)acryloxyalkyl, meth)acryloxypolyalkylene oxide, (meth)acryloyloxyalkoxide, polyalkylene oxide, vinylaryl, vinylarylalkyl, vinylaryloxy, vinylarylalkyloxy, —OH, or —O−M+, alkoxy, —COOH, -alkylene-COOH, —COO−M+, —CH2COO−M+, CH3(CH2)n2C(O)OCnH2n+1CH═CHCH2—, CH3(CH2)n2C(O)O or CnH2n+1CH═C(CH3)CH2—;
• or R3 is
• where the dotted bond joins R3 to the remainder of Structure I;
• X1 represents CH or N;
• R4 is O when ring C is absent;
• or represents CH when ring C is present;
• R5 is ═NH2+X−, =NH+alkyl X−, ═N+(alkyl)2X−, NH2, NHalkyl, N(alkyl)2, or ═O;
• R6 is H, alkyl, alkylene, —NH2, NHalkyl, N(alkyl)2, (meth)acryloxy, (meth)acrylamido, (meth)allyl, —COOH, —COO−M+, phosphate, phosphonate, sulfonate, vinylaryl, vinylarylalkyl, vinylaryloxy, vinylarylalkyloxy, (meth)allyloxy, (meth)acryloxy, (meth)acryloxypolyalkylene oxide, (meth)acrylamido, polyalkylene oxide, (meth)acryloxyalkyl, or (meth)allylamino;
• R7 is H, M+, alkyl, alkenyl, arylalkyl, alkyl-CH═CH-alkylene-, alkyl-CH═C(CH3)-alkylene-, —O-(meth)-alkyl, CH2═CR′—C(═O)—O-alkylene-O—C(═O)—O—, (meth)allyloxy, (meth)acryloxy, (meth)acryloxypolyalkylene oxide, (meth)acrylamido, polyalkylene oxide, (meth)acryloxyalkyl, or (meth)allylamino;
• R′ is H or alkyl;
• n is 0-10;
• m is 2 when n=0;
• and m is 1 when n=1-10;
• X− is an anionic counter ion;
• and
• M+ is a cationic counterion;
• with the proviso that R1, R3, R6 or R7 have at least one polymerizable double bond;
• and Structure II comprises rings E and F and optionally rings G and/or H:
• wherein
• R8 is H, alkyl, NH2, NHalkyl, N(alkyl)2, ═NH2+X−, =NH+alkyl X−, ═N(alkyl)2X−, ═O, OH, or O−M+, —COOH, -alkylene-COOH, or —COO−M+, or -alkylene-COO−M+;
• R9 is H or alkyl;
• R10 is H, —OH, or —O−M+, alkyl, —COOH, -alkylene-COOH, —COO−M+, or -alkylene-COO−M+;
• or R10 is
• where the dotted bond joins R10 to the remainder of Structure II;
• X1 is CH or N;
• R11 is O when ring G is absent;
• or represents CH when ring G is present;
• R12 is ═NH2+X−, =NH+alkyl X−, ═N+(alkyl)2X−, NH2, NHalkyl, N(alkyl)2, or ═O;
• R13 is H, —NH2, NHalkyl, N(alkyl)2, —COOH, —COO−M+, phosphate, phosphonate, or sulfonate;
• R14 is H or M+;
• X− has the meaning given above;
• M+ has the meaning given above;
• and
• rings D and H, when present, are optionally substituted.