Hole transporting polymer and organic electroluminescence device using the same

A hole transporting polymer comprising a repeating structural unit represented by the following general formula (5), and having a polystyrene-reduced number-average molecular weight of from 103 to 107:

• 31
• wherein Ar9 and Ar11 independently represent an arylene group having 6 to 30 carbon atoms, an aromatic amine group represented by the following general formula (6) or an arylene ethenylene group represented by the following general formula (7);
• Ar10 represents an aryl group having 6 to 30 carbon atoms, an aromatic amine group represented by the following general formula (8) or an arylene ethenylene group represented by the following general formula (9);
• a ring may be formed between Ar9 and Ar10, or Ar9 and Ar11, or Ar10 and Ar11;
• and R8, R9, R10 and R11 independently represent hydroxy group, an alkyl or alkoxy group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms or an aralkyl group having 7 to 32 carbon atoms, a group represented by the following general formula (10) or (12), or divalent oxygen atom which may be bonded to an intramolecular silicon atom by crosslinking or to a silicon atom in the molecule vicinally sited by crosslinking:
• 32
• wherein Ar12 and Ar13 independently represent an arylene group having 6 to 30 carbon atoms;
• R12 represents an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms or an aralkyl group having 7 to 32 carbon atoms;
• and a ring may be formed between Ar12 and Ar13, or Ar12 and R12, or Ar13 and R12:
• 33
• wherein Ar14 and Ar15 independently represent an arylene group having 6 to 30 carbon atoms;
• and R13 and R14 independently represent hydrogen atom, an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms or an aralkyl group having 7 to 32 carbon atoms:
• 34
• wherein Ar16 represents an arylene group having 6 to 30 carbon atoms;
• R15 and R16 independently represent an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms or an aralkyl group having 7 to 32 carbon atoms;
• and a ring may be formed between Ar16 and R15, or Ar16 and R16, or R15 and R16):
• 35
• wherein Ar17 represents an arylene group having 6 to 30 carbon atoms;
• R17 and R18 independently represent hydrogen atom, an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms or an aralkyl group having 7 to 32 carbon atoms;
• and Ar18 represents an aryl group having 6 to 30 carbon atoms:
• 36
• wherein Ar19 and Ar21 independently represent an arylene group having 6 to 30 carbon atoms, an aromatic amine group represented by the above general formula (6) or an arylene ethenylene group represented by the above general formula (7);
• Ar20 represent an aryl group having 6 to 30 carbon atoms, an aromatic amine group represented by the above general formula (8) or an arylene ethenylene group represented by the above general formula (9);
• and a ring may be formed between Ar19 and Ar20, or Ar19 and Ar21, or Ar20 and Ar21;
• R19 and R20 independently represent hydroxy group, an alkyl or alkoxy group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms or an aralkyl group having 7 to 32 carbon atoms, or divalent oxygen atom which may be bonded to an intramolecular silicon atom by crosslinking or to a silicon atom in the molecule vicinally sited by crosslinking;
• R21 represents hydrogen atom or a group represented by the following general formula (11):
• 37
• wherein R22, R23 and R24 independently represent hydroxy group, an alkyl group or alkoxy group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms or an aralkyl group having 7 to 32 carbon atoms:
• 38
• wherein R25, R26 and R27 independently represent an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms or an aralkyl group having 7 to 32 carbon atoms, or an arylene ethenylene group represented by the above general formula (9) or an aromatic amine group represented by the following general formula (13):
• 39
• wherein Ar22 represents an arylene group having 6 to 30 carbon atoms, an aromatic amine group represented by the above general formula (6) or an arylene ethenylene group represented by the above general formula (7);
• Ar23 and Ar24 independently represent an aryl group having 6 to 30 carbon atoms, an aromatic amine group represented by the above general formula (8) or an arylene ethenylene group represented by the above general formula (9).