# US 5,352,554 A · Organic silicon compound, method of its production, and photoreceptor for electrophotography incorporating it > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,352,554 A - Document ID: US5352554A - Status: Granted - Kind: A - Application number: 07/969,438 - Filed: 1992-10-30 - Granted: 1994-10-04 - Earliest claimed: 1990-03-14 - Assignees: Kao Corporation - Inventors: Masayuki Mishima; Harumasa Yamasaki; Takashi Matsuse; Tadashi Sakuma; Hiroyasu Togashi - Web page: https://patentgrep.com/patent/US5352554A ## CPC - G03G 5/062: {containing non-metal elements other than hydrogen, halogen, oxygen or nitrogen} - C07F 7/081: {comprising at least one atom selected from the elements N, O, halogen, S, Se or Te} - G03G 5/0564: {Polycarbonates} - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY - C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22) ## Abstract A compound represented by the formula (1): ##STR1## wherein Ar.sub.1 represents an arylene group; Ar.sub.2 and Ar.sub.3 independently represent an aryl group or an arylene group; R.sub.2 and R.sub.3, which may be identical or not, independently represent a hydrogen atom or an alkyl group having a carbon number of 4 or less, or R.sub.2 and R.sub.3 both represent --SiR.sub.4 R.sub.5 R.sub.6 (R.sub.4, R.sub.5 and R.sub.6, which may be identical or not, independently represent an alkyl group, aralkyl group or aryl group which may be substituted); R.sub.1 represents --SiR.sub.7 R.sub.8 R.sub.9 (R.sub.7, R.sub.8 and R.sub.9, which may be identical or not, independently represent an alkyl group, cycloalkyl group, aralkyl group or aryl group which may be substituted, or none (only in the case where R.sub.2 and R.sub.3 represent --SiR.sub.4 R.sub.5 R.sub.6), one or two of R.sub.7, R.sub.8 and R.sub.9 represent the following: ##STR2## wherein Ar.sub.1, Ar.sub.2, Ar.sub.3, R.sub.2 and R.sub.3 have the same definitions as above), a method of its production and a photoreceptor for electrophotography incorporating it as a charge transport material. The photoreceptor is very excellent in sensitivity and durability. ## Claims ### Claim 1 A photoreceptor for electrophotography, comprising a conductive substrate having a charge generation layer and a charge transport layer disposed thereon, wherein said charge transport layer comprises a compound represented by the formula (1): ##STR14## wherein Ar.sub.1 represents an arylene group; Ar.sub.2 and Ar.sub.3 independently represent an aryl group or an arylene group; R.sub.2 and R.sub.3, which may be identical or different, independently represent a hydrogen atom or an alkyl group having a carbon number of 4 or less, or R.sub.2 and R.sub.3 both represent --SiR.sub.4 R.sub.4 R.sub.6, wherein R.sub.4, R.sub.5, and R.sub.6, which may be identical or different, independently represent an alkyl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted aryl group; R.sub.1 represents --SiR.sub.7 R.sub.8 R.sub.9 wherein R.sub.7, R.sub.8, and R.sub.9, which may be identical or different, independently represent an alkyl group, a cycloalkyl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted aryl group and up to two or R.sub.7, R.sub.8, and R.sub.9 represent the following: ##STR15## wherein Ar.sub.1, Ar.sub.2, Ar.sub.3, R.sub.2 and R.sub.3 have the same definitions as above with the proviso that when both R.sub.2 and R.sub.3 are not --SiR.sub.4 R.sub.5 R.sub.6, one of two of R.sub.7, R.sub.8 and R.sub.9 represent the following: ##STR16## wherein Ar.sub.1, Ar.sub.2, Ar.sub.3, R.sub.2 and R.sub.3 have the same definitions as above. ### Claim 2 (depends on 1) The photoreceptor according to claim 1, wherein said charge transfer layer further comprises a polycarbonate resin which comprises a repeating unit represented by formula (55): ##STR17## wherein R.sub.10, R.sub.11, R.sub.12, R.sub.13, R.sub.14, R.sub.15, R.sub.16 and R.sub.17 independently represent a hydrogen, halogen or alkyl group. ### Claim 3 (depends on 2) A photoreceptor for electrophotography according to claim 2 wherein said resin is represented by the formula: ##STR18## ### Claim 4 (depends on 1) The photoreceptor according to claim 1, wherein said compound of formula (1) is represented by a compound of the formula (2): ##STR19## wherein Ar.sub.1, Ar.sub.2, Ar.sub.3, R.sub.2, R.sub.3, R.sub.7 and R.sub.9 have the same definitions as in claim 1. ### Claim 5 (depends on 4) The photoreceptor according to claim 4 wherein R.sub.7 and R.sub.9 represent alkyl groups. ### Claim 6 (depends on 4) The photoreceptor according to claim 4, wherein said compound of formula (2) is represented by the formula: ##STR20## ### Claim 7 (depends on 4) The photoreceptor according to claim 4, wherein said compound of formula (2) is represented by the formula: ##STR21## ### Claim 8 (depends on 1) The photoreceptor according to claim 1, wherein said compound of formula (1) is represented by a compound of the formula (3): ##STR22## wherein Ar.sub.1, Ar.sub.2, Ar.sub.3, R.sub.2, R.sub.3 and R.sub.7 have the same definitions as in claim 1. ### Claim 9 (depends on 8) The photoreceptor according to claim 8 wherein R.sub.7 represents an alkyl group. ### Claim 10 (depends on 8) The photoreceptor according to claim 8, wherein said compound of formula (3) is represented by the formula: ##STR23## ### Claim 11 (depends on 8) The photoreceptor according to claim 8, wherein said compound of formula (3) is represented by the formula: ##STR24## ### Claim 12 (depends on 1) The photoreceptor according to claim 1, wherein said compound of formula (1) is represented by a compound of the formula (4): ##STR25## wherein Ar.sub.1, Ar.sub.2, Ar.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8 and R.sub.9 have the same definitions as in claim 1. ### Claim 13 (depends on 12) The photoreceptor according to claim 12 wherein R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8 and R.sub.9 represent alkyl groups. ### Claim 14 (depends on 12) The photoreceptor according to claim 12, wherein said compound of formula (4) is represented by the formula: ##STR26## ### Claim 15 (depends on 12) The photoreceptor according to claim 12, wherein said compound of formula (4) is represented by the formula: ##STR27## ### Claim 16 A photoreceptor for electrophotography, comprising a conductive substrate and a light sensitive layer, said light sensitive layer comprising a compound represented by the formula (1): ##STR28## wherein Ar.sub.1 represents an arylene group; Ar.sub.2 and Ar.sub.3 independently represent an aryl group or an arylene group; R.sub.2 and R.sub.3, which may be identical or different, independently represent a hydrogen atom or an alkyl group having a carbon number of 4 or less, or R.sub.2 and R.sub.3 both represent --SiR.sub.4 R.sub.5 R.sub.6, wherein R.sub.4, R.sub.5, and R.sub.6, which may be identical or different, independently represent an alkyl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted aryl group; R.sub.1 represents --SiR.sub.7 R.sub.8 R.sub.9 wherein R.sub.7, R.sub.8, and R.sub.9, which may be identical or different, independently represent an alkyl group, a cycloalkyl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted aryl group and up to two or R.sub.7, R.sub.8, and R.sub.9 represent the following: ##STR29## wherein Ar.sub.1, Ar.sub.2, Ar.sub.3, R.sub.2 and R.sub.3 have the same definitions as above with the proviso that when both R.sub.2 and R.sub.3 are not --SiR.sub.4 R.sub.5 R.sub.6, one of two of R.sub.7, R.sub.8 and R.sub.9 represent the following: ##STR30## wherein Ar.sub.1, Ar.sub.2, Ar.sub.3, R.sub.2 and R.sub.3 have the same definitions as above.