Organic heterocyclic electrophotosensitive materials for migration imaging processes

Claim 1

An electrophoretic migration imaging process which comprises subjecting an electrically photosensitive colorant material positioned between at least two electrodes to an applied electric field and exposing said materials to an image pattern of radiation to which the material is photosensitive, thereby obtaining image formation of said electrically photosensitive materials on at least one of said electrodes, wherein at least a portion of said electrically photosensitive colorant material is an electrically photosensitive material having one of the following structures: ##STR42## r and s may be zero, one two or three; R 1 and R 2 may be the same or different and each may represent hydrogen, alkyl, aryl, alkoxyalkyl or alkoxyaryl; Y represents O or S; L 1 , L 2 , L 3 , L 4 and L 5 , which may be the same or different, represent hydrogen, alkyl, aryl or aralkyl and in addition either L 1 and L 2 or any two of L 3 , L 4 and L 5 , together with the atoms to which they are attached, may represent the elements needed to complete a carbocyclic ring; A 1 represents napthoquinolizine, acridine, quinazoline, or an N-substituted nucleus selected from the group consisting of imidazole, 3H-indole, thiazole, benzothiazole, naphthothiazole, dioxolobenzothiazole, thianaphtheno-7',6',4,5-thiazole, oxazole, naphthoxazole, selenazole, benzoselenazole, naphthoselenazole, thiazoline, 2-quinoline, 4-quinoline, 1-isoquinoline, benzimidazole, 2-pyridine, 4-pyridine, triazolobenzothiazole, quinolizine or tetrazole; A 2 represents a heterocyclic nucleus as defined for A 1 and in addition represents aryl or a heterocyclic nucleus selected from the group consisting of benzo[b]thiophene, naphtho[2,3-b]thiophene, furan, isobenzofuran, chromene, pyran, xanthene, pyrrole, 2H-pyrrole, pyrazole, indolizine, indoline, indole, indazole, carbazole, pyrimidine, isothiazole, isoxazole, furazan, chroman, isochroman, tetrahydroquinoline, 4H-pyrrolo[3,2,1-ij]quinoline, dihydro-4H-pyrrolo[3,2,1-ij]-quinoline; tetrahydro-4H-pyrrolo[3,2,1-ih]quinoline; 1H,5H-benzo[ij]quinolizine; dihydro 1H,5H-benzo[ij]quinolizine and tetrahydro-1H,5H-benzo[ij]quinolizine, dihydro-9H-benzo[a]-xanthen-8-yl; dihydro-5H-benzo[b]pyran-7-yl; said N-substituents are selected from the group consisting of alkyl, aryl, haloaryl and dialkylamino; and A 1 and A 2 may be further substituted by one or more substituents selected from the group consisting of hydrogen, alkyl, aryl, alkylaryl, alkoxy, aryloxy, halogen, nitro, oxo, haloaryl, dialkylamino, diarylamino or A 1 (CH--CH) r .