Photoconductive imaging members

A photoconductive imaging member comprised of a supporting substrate, a hole blocking layer thereover, a photogenerating layer and a charge transport layer, and wherein the hole blocking layer is comprised of a crosslinked polymer derived from the reaction of a silyl-functionalized hydroxyalkyl polymer of Formula (I) with an organosilane of Formula (II) and water

• wherein A, B, D, and F represent the segments of the polymer backbone;
• E is an electron transporting moiety;
• X is selected from the group consisting of halide, cyano, alkoxy, acyloxy, and aryloxy;
• a, b, c, and d are mole fractions of the repeating monomer units such that the sum of a+b+c+d is equal to 1;
• R is alkyl, substituted alkyl, aryl, or substituted aryl;
• and R1, R2, and R3 are independently selected from the group consisting of alkyl, aryl, alkoxy, aryloxy, acyloxy, halogen, cyano, and amino, subject to the provision that two of R1, R2, and R3 are independently selected from the group consisting of alkoxy, aryloxy, acyloxy, and halide;
• and wherein the silyl-functionalized hydroxyalkyl polymer is represented by Formula (IV)
• wherein R4, R5, R6, and R7 are independently selected from a hydrogen atom and alkyl;
• Z is selected from the group consisting of chloride, bromide, iodide, cyano, alkoxy, acyloxy;
• J, K and L are divalent linkages;
• G is aryl or alkoxycarbonyl;
• and a, b, c, and d are mole fractions wherein the sum of a+b+c+d is equal to 1.

A photoconductive imaging member comprised of a supporting substrate, a hole blocking layer thereover, a photogenerating layer and a charge transport layer, and wherein the hole blocking layer is comprised of a crosslinked polymer derived from the reaction of a silyl-functionalized hydroxyalkyl polymer of Formula (I) with an organosilane of Formula (II)

• wherein A, B, D, and F represent the segments of the polymer backbone;
• E is an electron transporting moiety;
• X is selected from the group consisting of halide, cyano, alkoxy, acyloxy, and aryloxy;
• a, b, c, and d are mole fractions of the repeating monomer units such that the sum of a+b+c+d is equal to 1;
• R is alkyl, substituted alkyl, aryl, or substituted aryl;
• and R1, R2, and R3 are independently selected from the group consisting of alkyl, aryl, alkoxy, aryloxy, acyloxy, halogen, cyano, and amino, subject to the provision that two of R1, R2, and R3 are independently selected from the group consisting of alkoxy, aryloxy, acyloxy, and halide;
• and wherein said hole blocking layer is comprised of crosslinked polymer schematically represented by (V) derived from the reaction of polymer (IV) and organosilane (II).

A photoconductive imaging member comprised of a hole blocking layer, a photogenerating layer and a charge transport layer, and wherein the hole blocking layer is comprised of a crosslinked polymer derived from the reaction of a silyl-functionalized hydroxyalkyl polymer of Formula (I) with an organosilane of Formula (II)

• wherein A, B, D, and F represent the segments of the polymer backbone;
• E is an electron transporting moiety;
• X is cyano, alkyl, alkoxy, halide, aryl, aryloxy, or acyloxy;
• a, b, c, and d are mole fractions of the repeating monomer units;
• R is alkyl, substituted alkyl, aryl, or substituted aryl;
• and R1, R2, and R3 are independently selected from the group consisting of alkyl, aryl, alkoxy, aryloxy, acyloxy, halogen, cyano, and amino, subject to the provision that two of R1, R2, and R3 are independently selected from the group consisting of alkoxy, aryloxy, acyloxy, and halide.

A photoconductive imaging member comprised of a supporting substrate, a hole blocking layer, a photogenerating layer and a charge transport layer, and wherein the hole blocking layer is comprised of a polymer generated from the reaction of a silyl-functionalized hydroxyalkyl polymer of Formula (I) with an organosilane of Formula (II)

• wherein A, B, D, and F represent the segments of the polymer backbone;
• E is an electron transporting moiety;
• X is halide, aliphatic, aryl, or cyano;
• a, b, c, and d represent mole fractions of the repeating monomer units;
• R is aliphatic or aryl, and R1, R2, and R3 are independently selected from the group consisting of alkyl, aryl, alkoxy, aryloxy, acyloxy, haogen, cyano, and amino, subject to the provision that two of R1, R2, and R3 are independently selected from the group consisting of alkoxy, aryloxy, acyloxy, and halide.

A photoconductive imaging member consisting essentially of a supporting substrate, a hole blocking layer thereover, a photogenerating layer and a charge transport layer, and wherein the hole blocking layer is comprised of a crosslinked polymer derived from the reaction of a silyl-functionalized hydroxyalkyl polymer of Formula (I) with an organosilane of Formula (II) and water

• wherein A, B, D, and F represent the segments of the polymer backbone;
• E is an electron transporting moiety;
• X is selected from the group consisting of halide, cyano, alkoxy, acyloxy, and aryloxy;
• a, b, c, and d are mole fractions of the repeating monomer units such that the sum of a+b+c+d is equal to 1;
• R is alkyl, substituted alkyl, aryl, or substituted aryl;
• and R1, R2, and R3 are independently selected from the group consisting of alkyl, aryl, alkoxy, aryloxy, acyloxy, halogen, cyano, and amino, subject to the provision that two of R1, R2, and R3 are independently selected from the group consisting of alkoxy, aryloxy, acyloxy, and halide.

A photoconductive imaging member comprised of a supporting substrate, a hole blocking layer thereover, a photogenerating layer and a charge transport layer, and wherein the hole blocking layer is comprised of a crosslinked polymer derived from the reaction of a silyl-functionalized hydroxyalkyl polymer of Formula (I) with an organosilane of Formula (II) and water

• wherein A, B, D, and F represent the segments of the polymer backbone;
• E is an electron transporting moiety;
• X is selected from the group consisting of halide, cyano, alkoxy, acyloxy, and aryloxy;
• a, b, c, and d are mole fractions of the repeating monomer units such that the sum of a+b+c+d is equal to 1;
• R is alkyl, substituted alkyl, aryl, or substituted aryl;
• and R1, R2, and R3 are independently selected from the group consisting of alkyl, aryl, alkoxy, aryloxy, acyloxy, halogen, cyano, and amino, subject to the provision that two of R1, R2, and R3 are independently selected from the group consisting of alkoxy, aryloxy, acyloxy, and halide;
• all equivalents thereof and all substantial or similar equivalents thereof.