Photonic structures from self assembly of brush block copolymers and polymer blends

A block copolymer comprising:

• a first polymer block comprising first repeating units;
• wherein each of said first repeating units of said first polymer block comprises a first polymer backbone group directly or indirectly covalently linked to a first polymer side chain group having a helical secondary structure, wherein each of said first polymer side chain groups of said first polymer block independently comprises a number of repeating units;
• and
• a second polymer block comprising second repeating units;
• wherein each of said second repeating units of said second polymer block comprises a second polymer backbone group directly or indirectly covalently linked to a second polymer side chain group that is different than said first polymer side chain group or a first wedge group;
• wherein said first and second repeating units are directly covalently linked along a backbone of said block copolymer;
• wherein said block copolymer has the formula (FX6A) or (FX6B) or (FX7):
• wherein R1 is independently a hydrogen, C1-C30 alkyl, C3-C30 cycloalkyl, C5-C30 aryl, C5-C30 heteroaryl, C1-C30 acyl, C1-C30 hydroxyl, C1-C30 alkoxy, C2-C30 alkenyl, C2-C30 alkynyl, C5-C30 alkylaryl, —CO2R30, —CONR31R32, —COR33, —SOR34, —OSR35, —SO2R36, —OR37, —SR38, —NR39R40, —NR41COR42, C1-C30 alkyl halide, phosphonate, phosphonic acid, silane, siloxane, silsesquioxane, C2-C30 halocarbon chain, C2-C30 perfluorocarbon, C2-C30 polyethylene glycol, a metal, or a metal complex, wherein each of R30-R42 is independently a H, C5-C10 aryl or C1-C10 alkyl;
• and wherein R12 is independently a hydrogen, C1-C30 alkyl, C3-C30 cycloalkyl, C5-C30 aryl, C5-C30 heteroaryl, C1-C30 acyl, C1-C30 hydroxyl, C1-C30 alkoxy, C2-C30 alkenyl, C2-C30 alkynyl, C5-C30 alkylaryl, —CO2R30, —CONR31R32, —COR33, —SOR34, —OSR35, —SO2R36, —OR37, —SR38, —NR39R40, —NR41COR42, C1-C30 alkyl halide, phosphonate, phosphonic acid, silane, siloxane, silsesquioxane, C2-C30 halocarbon chain, C2-C30 perfluorocarbon, C2-C30 polyethylene glycol, a metal, or a metal complex;
• and wherein R1 and R12 are different groups;
• wherein Q1 is a first backbone terminating group and Q2 is a second backbone terminating group;
• L1 is a first linking group, L2 is a second linking group;
• each of n and m is independently an integer selected from the range of 20 to 2000;
• K is a repeating group of said second polymer side chain group, G1 is said first wedge group;
• each of R10 and R11 is independently a polymer side chain terminating group;
• and each of p and q is independently an integer selected from the range of 30 to 2000.