Abstract: A photoconductive layer embodies the combination of an organic photoconductive donor compound, such as poly(N-vinyl) carbazole and derivatives thereof, and an acceptor-sensitizer compound having the general formula ##STR1## in which M is a metal such as boron, aluminum, gallium, indium and thallium, X and Y are oxygen sulphur, nitrogen, phosphorus, antimony or selenium, Z.sub.1 and Z.sub.2 are halogen, or substituted or unsubstituted alkyl, alkaryl or heterocyclic groups, R.sub.1 and R.sub.2 are substituted or unsubstituted aryl, alkaryl, alkyl or alicyclic groups, and n is 2 or 3.

Abstract: Method of photopolymerization to produce vinyl based polymers and copolymers in the presence of a catalyst in the form of complex metal chelates.

Abstract: An imaged development process and materials wherein use is made of a photographic medium sensitive to ultraviolet radiations and formulated of an alkyl cellulose derivative and 7,7,8,8-tetracyanoquinodimethane.

Abstract: A series of chelated diketones in which the chelated atom is aluminum can be used as acceptor type sensitizers and plasticizers for polymeric photoconductors of the donor type used in electrophotography.

Abstract: The preparation of a photoconductor which comprises the polymerization reaction product of an N-alkenyl carbazole or derivative thereof such as N-vinyl carbazole, in the presence of a catalyst in the form of a monochelate or muli-chelate of boron in which the chelate catalyzes the polymerization reaction and remains in the polymerization product as a sensitizer for the photoconductive properties of the organic polymer.

Abstract: A series of chelated diketones in which the chelated atom is boron can be used as acceptor type sensitizers for polymeric photoconductors of the donor type used in electrophotography.