Compounds of Structure 1, ** Formula ** where R represents a linear chain - (CH2) n-, where n>； = 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 R1 and R2 are the same or different, and are independently selected from the group consisting of H, alkyl, alkyloxy, alkenyl or alkynyl residues having 1 to 12 carbon atoms, aryl or heteroaryl residues, or taken together are - (CH2 ) n-, where n>； = 2, 3, 4, 5, 6, 7, 8, 9, or 10； R3 is H； X represents O, S, or NH； X1 is selected from the group consisting of H, OH, Cl, Br, F, I, NO2, NO, CN, SO2R5, COR5, COOR5, NR6COR5, SOR5, SR5, PO3R6R6 ', C1-6 alkyl residues, C1 perfluoroalkyl -6, C1-6 alkenyl, C1-6 alkynyl, and C1-6 alkyloxy； X2 is selected from the group consisting of H, OH, Cl, Br, F, I, NO2, CN, SO2R5, COR5, COOR5, NR6COR5, SOR5, SR5, PO3R6R6 ', C1-6 alkyl residues, C1-6 perfluoroalkyl , C1-6 alkenyl, C1-6 alkynyl, and C1-6 alkyloxy； X3 is selected from the group consisting of H, OH, Cl, Br, F, I, NO2, CN, SO2R5, COR5, COOR5, NR6COR5, SOR5, SR5, PO3R6R6 ', C1-6 alkyl residues, C1-6 perfluoroalkyl , C1-6 alkenyl, C1-6 alkynyl, and C1-6 alkyloxy； X4 is selected from the group consisting of H, OH, Cl, Br, F, I, NO2, CN, SO2R5, COR5, COOR5, NR6COR5, SOR5, SR5, PO3R6R6 ', C1-6 alkyl residues, C1-6 perfluoroalkyl , C1-6 alkenyl, C1-6 alkynyl, and C1-6 alkyloxy； X5 is selected from the group consisting of H, OH, Cl, Br, F, I, NO2, CN, SO2R5, COR5, COOR5, NR6COR5, SOR5, SR5, PO3R6R6 ', C1-6 alkyl residues, C1-6 perfluoroalkyl , C1-6 alkenyl, C1-6 alkynyl, and C1-6 alkyloxy； X6 is selected from the group consisting of H, OH, Cl, Br, F, I, NO2, CN, SO2R5, COR5, COOR5, NR6COR5, SOR5, SR5, PO3R6R6 ', C1-6 alkyl residues, C1-6 perfluoroalkyl , C1-6 alkenyl, C1-6 alkynyl, and C1-6 alkyloxy； R5 is selected from the group consisting of H, OH, Cl, Br, F, I, NO2, CN, SO2R6, COR6, COOR6, NR6COR7, SOR6, SR6, PO3R6R6 ', C1-6 alkyl residues, C1-6 alkyloxy , C1-6 perfluoroalkyl, C1-6 alkenyl, C1-6 alkynyl, and C1-6 alkyl halide； R6 and R6 'are the sa
