A supramolecular structure comprising a mixture of at least two different compounds of formula VIa or VIb: wherein each of the at least two different compounds has a different size of PEG as represented by a different R 5 for each compound, wherein R 5 is OR x, wherein R x is [(CH 2) n O] o CH 3, n is 2 and "o" is different for each compound; R 1 is [(CH 2) n O] o CH 3, [(CH 2) n C O] o CH 3, [(CH 2) n C NH] o CH 3, [(CH 2) n CH 2 =CH 2] o CH 3, [(CH 2) n CH=CH] o CH 3, [(CH 2) n NH] o CH 3, linear or branched (C 1 -C 32)alkyl, (C 3 -C 8)cycloalkyl, aryl, heteroaryl, (C 1 -C 32)alkyl-COOH, (C 1 -C 32)alkyl-Si-A, or [C CHR 3 NH] p H wherein said aryl or heteroaryl groups are optionally substituted by 1-3 substituents selected from halide, CN, CO 2 H, OH, SH, NH 2, CO 2 -(C 1 -C 6 alkyl), and O-(C 1 -C 6 alkyl); wherein A is three same or different of the following substituents Cl, Br, I, O(C 1 -C 8)alkyl or (C 1 -C 8)alkyl; and wherein R 3 in said [C CHR 3 NH] p H is independently the same or different H, (C 1 -C 6)alkyl, (C 1 -C 6)hydroxyalkyl, (C 1 -C 6)mercaptoalkyl, (C 1 -C 6)aminoalkyl, (C 1 -C 6)carboxyalkyl, (C 1 -C 6)carboxamidoalkyl, (C 1 -C 6)guanidinoalkyl, aryl, (aryl)alkyl, heteroaryl or (heteroaryl)alkyl; R 2 is [(CH 2) q O] r CH 3, [(CH 2) q C O] r CH 3, [(CH 2) q C NH] r CH 3, [(CH 2) q CH 2 =CH 2] r CH 3, [(CH 2) q CH=CH] r CH 3, [(CH 2) q NH] r CH 3, linear or branched (C 1 -C 32)alkyl, (C 3 -C 8)cycloalkyl, aryl, heteroaryl, (C 1 -C 32)alkyl-COOH, (C 1 -C 32)alkyl-Si-A, or [C CHR 4 NH] s H wherein said aryl or heteroaryl groups are optionally substituted by substituents selected from halide, CN, CO 2 H, OH, SH, NH 2, CO 2 -(C 1 -C 6 alkyl), and O-(C 1 -C 6 alkyl); wherein A is three same or different of the following substituents Cl, Br, I, O(C 1 -C 8)alkyl or (C 1 -C 8)alkyl; and wherein R 4 in said [C CHR 4 NH] s H is independently the same or different H, (C 1 -C 6)alkyl, (C 1 -C 6)hydroxyalkyl, (C 1 -C 6)mercaptoalkyl, (C 1 -C 6)aminoalkyl, (C 1 -C 6)carboxyalkyl, (C 1 -C 6)carboxamidoalkyl, (C 1 -C 6)guanidinoalkyl, aryl, (aryl)alkyl, heteroaryl or (heteroaryl)alkyl; R 7 is H, halo, (C 1 -C 32)alkyl, aryl, heteroaryl, Si 3 or Si[(C 1 -C 8)alkyl] 3 wherein said aryl or heteroaryl groups are optionally substituted by 1-3 substituents selected from halide, CN, CO 2 H, OH, SH, NH 2, CO 2 -(C 1 -C 6 alkyl), and O-(C 1 -C 6 alkyl); R 8, R 9, R 10 and R 11 are independently H, (C 1 -C 32)alkyl, aryl or heteroaryl wherein said aryl or heteroaryl groups are optionally substituted by 1-3 substituents selected from halide, CN, CO 2 H, OH, SH, NH 2, CO 2 -(C 1 -C 6 alkyl), and O-(C 1 -C 6 alkyl); L is an diethynyldipyridine group, ethynyl group or a diethynylbenzene group; P is a perylene-diimide group represented by the structure of formula Va or Vb: n is an integer from 1-5; o is an integer from 1-100; p is an integer from 1-100; q is an integer from 2-5; r is an integer from 1-100; and s is an integer from 1-100; or a metal complex thereof. each of the at least two different compounds has a different size of PEG as represented by a different R 5 for each compound, wherein R 5 is OR x, wherein R x is [(CH 2) n O] o CH 3, n is 2 and "o" is different for each compound; R 1 is [(CH 2) n O] o CH 3, [(CH 2) n C O] o CH 3, [(CH 2) n C NH] o CH 3, [(CH 2) n CH 2 =CH 2] o CH 3, [(CH 2) n CH=CH] o CH 3, [(CH 2) n NH] o CH 3, linear or branched (C 1 -C 32)alkyl, (C 3 -C 8)cycloalkyl, aryl, heteroaryl, (C 1 -C 32)alkyl-COOH, (C 1 -C 32)alkyl-Si-A, or [C CHR 3 NH] p H wherein said aryl or heteroaryl groups are optionally substituted by 1-3 substituents selected from halide, CN, CO 2 H, OH, SH, NH 2, CO 2 -(C 1 -C 6 alkyl), and O-(C 1 -C 6 alkyl); wherein A is three same or different of the following substituents Cl, Br, I, O(C 1 -C 8)alkyl or (C 1 -C 8)alkyl; and wherein R 3 in said [C CHR 3 NH] p H is independently the same or different H, (C 1 -C 6)alkyl, (C 1 -C 6)hydroxyalkyl, (C 1 -C 6)mercaptoalkyl, (C 1 -C 6)aminoalkyl, (C 1 -C 6)carboxyalkyl, (C 1 -C 6)carboxamidoalkyl, (C 1 -C 6)guanidinoalkyl, aryl, (aryl)alkyl, heteroaryl or (heteroaryl)alkyl; R 2 is [(CH 2) q O] r CH 3, [(CH 2) q C O] r CH 3, [(CH 2) q C NH] r CH 3, [(CH 2) q CH 2 =CH 2] r CH 3, [(CH 2) q CH=CH] r CH 3, [(CH 2) q NH] r CH 3, linear or branched (C 1 -C 32)alkyl, (C 3 -C 8)cycloalkyl, aryl, heteroaryl, (C 1 -C 32)alkyl-COOH, (C 1 -C 32)alkyl-Si-A, or [C CHR 4 NH] s H wherein said aryl or heteroaryl groups are optionally substituted by substituents selected from halide, CN, CO 2 H, OH, SH, NH 2, CO 2 -(C 1 -C 6 alkyl), and O-(C 1 -C 6 alkyl); wherein A is three same or different of the following substituents Cl, Br, I, O(C 1 -C 8)alkyl or (C 1 -C 8)alkyl; and wherein R 4 in said [C CHR 4 NH] s H is independently the same or different H, (C 1 -C 6)alkyl, (C 1 -C 6)hydroxyalkyl, (C 1 -C 6)mercaptoalkyl, (C 1 -C 6)aminoalkyl, (C 1 -C 6)carboxyalkyl, (C 1 -C 6)carboxamidoalkyl, (C 1 -C 6)guanidinoalkyl, aryl, (aryl)alkyl, heteroaryl or (heteroaryl)alkyl; R 7 is H, halo, (C 1 -C 32)alkyl, aryl, heteroaryl, Si 3 or Si[(C 1 -C 8)alkyl] 3 wherein said aryl or heteroaryl groups are optionally substituted by 1-3 substituents selected from halide, CN, CO 2 H, OH, SH, NH 2, CO 2 -(C 1 -C 6 alkyl), and O-(C 1 -C 6 alkyl); R 8, R 9, R 10 and R 11 are independently H, (C 1 -C 32)alkyl, aryl or heteroaryl wherein said aryl or heteroaryl groups are optionally substituted by 1-3 substituents selected from halide, CN, CO 2 H, OH, SH, NH 2, CO 2 -(C 1 -C 6 alkyl), and O-(C 1 -C 6 alkyl); L is an diethynyldipyridine group, ethynyl group or a diethynylbenzene group; P is a perylene-diimide group represented by the structure of formula Va or Vb: