Mono-, oligo- and polythieno[3,2-b]thiophenes
The invention relates to novel mono-, oligo- and polythieno[3,2-b]thiophenes, to their use as semiconductors or charge transport materials, in optical, electro-optical or electronic devices like for example liquid crystal displays, optical films, organic field effect transistors (FET or OFET) for thin film transistor liquid crystal displays and integrated circuit devices such as RFID tags, electroluminescent devices in flat panel displays, and in photovoltaic and sensor devices, and to field effect transistors, light emitting devices or ID tags comprising the novel polymers.
1. A monomer, oligomer, or polymer compound comprising a structure according to formula I
([A] a [B] b [C] c [D] d ) n - I
wherein
A and C are each, independently of one another,
B and D are each, independently of one another, —CX 1 ═CX 2 —, or —C≡C—, or an arylene or heteroarylene group that is optionally substituted with one or more groups R 1 ,
R 1 and R 2 are each, independently of one another, H or halogen, or an aryl or heteroaryl group which is optionally substituted, or a straight chain, branched or cyclic alkyl with 1 to 20 C-atoms and which is unsubstituted or mono- or polysubstituted by F, Cl, Br, I or CN, and wherein optionally one or more non-adjacent CH 2 groups are replaced, in each case independently from one another, by —O—, —S—, —NH—, —NR 0 —, —SiR 0 R 00 —, —CO—, —COO—, —OCO—, —O—CO—O—, —S—CO—, —CO—S—, —CX 1 ═CX 2 — or —C≡C— in such a manner that O and/or S atoms are not linked directly to one another,
X 1 and X 2 are each, independently of one another, H, F, Cl or CN,
R 0 and R 00 are each, independently of one another, H, alkyl with 1 to 12 C-atoms, or aryl,
a and c are each, independently of one another, 0 or 1, wherein in at least one group [(A) a -(B) b -(C) c (D) d ] a and/or c is 1,
b and d are each, independently of one another, 0, 1 or 2, and
n is an integer from 1 to 10,000, wherein in case n>1 the groups [(A) a -(B) b -(C) c -(D) d ] can be identical or different, and
with the provisos that:
a) said compound comprise at least one group A or C that is substituted by groups R 1 and R 2 each having at least 3 C-atoms, and/or
b) said compound comprise at least one group B or D that is thiophene-2,5-diyl or selenophene-2,5-diyl substituted in 3- and/or 4-position by a group R 1 being different from H;
and with the proviso that said compound does not contain a thieno[2,3-b]thiophene group.
2. A monomer, oligomer, or polymer compound according to claim 1 , wherein said compound is a compound of formula I1
R 3 -[(A) a -(B) b -(C) c -(D) d ] n R 4 I1
wherein
R 3 and R 4 are each, independently, H, C 1 -C 12 -alkyl, halogen, Sn(R 0 ) 3 , B(OR 0 ) 2 , CH 2 Cl, COH, CH═CH 2 , or SiR 0 R 00 R 000 , or an optionally substituted aryl or heteroaryl group,
R 000 is H, alkyl with 1 to 12 C-atoms, or aryl.
3. An oligomer or polymer compound according to claim 1 , wherein said compound has a degree of polymerization (n) from 10 to 5000.
4. A monomer, oligomer, or polymer compound according to claim 1 , wherein R 1 and R 2 are selected from C 3 -C 20 -alkyl that is optionally substituted with one or more fluorine atoms, C 3 -C 20 -alkenyl, C 3 -C 20 -alkynyl, C 3 -C 20 -ester, C 3 -C 20 -amino, C 3 -C 20 -fluoroalkyl, an 4 optionally substituted aryl, and optionally substituted heteroaryl.
5. A monomer, oligomer, or polymer compound according claim 1 , wherein B and D are selected from:
1,4-phenylene, fluorinated 1,4-phenylene, 2,5-pyridine, 2,5-pyrimidine, p,p′-biphenyl, naphthalene-2,6-diyl, thiophene-2,5-diyl, selenophene-2,5-diyl, fluorinated or alkylated thiophene-2,5-diyl or selenophene-2,5-diyl, 2,2-dithiophene, fluorinated or alkylated 2,2-dithiophene, fluorinated benzo[1,2-b:4,5-b′]dithiophene, 2,5-thiazole, 2,5-thiadiazole, 2,5-oxazole and 2,5-oxadiazole,
which in each case is unsubstituted or mono- or polysubstituted with L, wherein L is F, Cl, Br, or an alkyl, alkoxy, alkylcarbonyl or alkoxycarbonyl group having up to 12 C atoms and wherein one or more H atoms are each optionally replaced by F or Cl.
6. A monomer, oligomer, or polymer compound according to claim 1 , wherein -([A] a -[B] b -[C] c -[D] d ) n - is selected from the following formulae
wherein R is H or halogen, or an aryl or heteroaryl group which is optionally substituted, or a straight chain, branched or cyclic alkyl with 1 to 20 C-atoms and which is unsubstituted or mono- or polysubstituted by F, Cl, Br, I or CN and wherein optionally one or more non-adjacent CH 2 groups are replaced, in each case independently from one another, by —O—, —S—, —NH—, —NR 0 —, —SiR 0 R 00 —, —CO—, —COO—, —OCO—, —O—CO—O—, —S—CO—, —CO—S—, —CX 1 ═CX 2 — or —C≡C— in such a manner that O and/or S atoms are not linked directly to one another.
7. In an optical, electrooptical or electronic components or devices, organic field effect transistors (OFET), integrated circuitry (IC), thin film transistors (TFT), flat panel displays, radio frequency identification (RFID) tags, electroluminescent or photoluminescent devices or components, organic light emitting diodes (OLED), backlights of displays, photovoltaic or sensor devices, charge injection layers, Schottky diodes, planarizing-layers, antistatic films, conducting substrates or patterns, electrode materials in batteries, photoconductors, electrophotographic applications, electrophotographic recording, organic memory devices, alignment layers, cosmetic or pharmaceutical compositions, comprising a charge-transport, semiconducting, electrically conducting, photoconducting or light-emitting material, the improvement wherein said material comprises a monomer, oligomer, or polymer compound according to claim 1 .
8. An optical, electrooptical or electronic device, FET, integrated circuit (IC), TFT, OLED or alignment layer comprising a material according to claim 1 .
9. A TFT or TFT away for flat panel displays, radio frequency identification (RFID) tag, electroluminescent display or backlight, comprising a material comprising a monomer, oligomer, or polymer according to claim 1 .
10. A security marking or device comprising a FET according to claim 8 .
11. A monomer, oligomer, or polymer compound according to claim 1 , wherein said compound is oxidatively or reductively doped to form a conducting ionic species.
12. A charge injection layer, planarizing layer, antistatic film or conducting substrate or pattern for electronic applications or flat panel displays, comprising a monomer, oligomer, or polymer compound according to claim 11 .
13. A monomer, oligomer, or polymer compound according to claim 1 , wherein optionally substituted aryl or heteroaryl groups for R 1 and R 2 are selected from mono-, bi- or tricyclic aromatic or heteroaromatic groups with up to 25 C atoms, wherein the rings can be fused, and in which the heteroaromatic group contains at least one hetero ring atom selected from N, O and S, wherein said aromatic or heteroaromatic groups are unsubstituted of substituted with one or more of F, Cl, Br, I, CN, and straight chain, branched or cyclic alkyl having 1 to 20 C atoms which is unsubstituted or mono- or poly-substituted by F, Cl, Br, I, —CN or —OH, and in which one or more non-adjacent CH 2 groups are each optionally replaced, independently, by —O—, —S—, —NH—, —NR 0 —, —SiR 0 R 00 —, —CO—, —COO—, OCO—, —OCO—O, —S—CO—, —CO—S—, —CH═CH— or —C≡C— in such a manner that O and/or S atoms are not linked directly to one another.
14. A monomer, oligomer, or polymer compound according to claim 1 , wherein optionally substituted aryl or heteroaryl groups for R 1 -R 4 are selected from mono-, bi- or tricyclic aromatic or heteroaromatic groups with up to 25 C atoms, wherein the rings can be fused, and in which the heteroaromatic group contains at least one hetero ring atom selected from N, O and S, wherein said aromatic or heteroaromatic groups are unsubstituted of substituted with one or more of F, Cl, Br, I, CN, and straight chain, branched or cyclic alkyl having 1 to 20 C atoms which is unsubstituted or mono- or poly-substituted by F, Cl, Br, I, —CN or —OH, and in which one or more non-adjacent CH 2 groups are each optionally replaced, independently, by —O—, —S—, —NH—, —NR 0 —, —SiR 0 R 00 —, —CO—, —COO—, OCO—, —OCO—O, —S—CO—, —CO—S—, —CH═CH— or —C≡C— in such a manner that O and/or S atoms are not linked directly to one another.
15. An oligomer or polymer compound according to claim 1 , wherein said compound has identical recurring units [(A) a -(B) b -(C) c -(D) d ].
16. A monomer, oligomer, or polymer compound according to claim 1 , wherein R 1 and R 2 are identical groups.
17. An oligomer or polymer compound according to claim 3 , wherein said compound has a degree of polymerization (n) from 20 to 1000.
18. An oligomer or polymer compound according to claim 1 , wherein said compound has a molecular weight from 5000 to 300,000.
19. An oligomer or polymer compound according to claim 18 , wherein said compound has a molecular weight from 10,000 to 100,000.
20. A polymer compound according to claim 1 , wherein the monomeric units of said polymer consist of identical recurring units of the formulae (A-B) n , (A-B-C) n , (A-B-D) n , (A-C-D) n , (B-C-D) n or (A-B-C-D) n .
21. A monomer, oligomer, or polymer compound according to claim 1 , wherein b is 1 and B is thiophene-2,5-diyl or selenophene-2,5-diyl that is optionally substituted by one or two groups R 1 that are different from H.
22. A monomer, oligomer, or polymer compound according to claim 2 , wherein R 3 and R 4 are selected from H, C 1 -C 12 -alkyl, halogen, Sn(R 0 ) 3 , B(OR 0 ) 2 CH 2 Cl, CH 2 OH, CH═CH 2 , SiR 0 R 00 R 000 , optionally substituted aryl, and optionally substituted heteroaryl.
23. A polymer compound according to claim 1 , wherein said compound is poly(3,6-dioctylthieno[3,2-b]thiophene).
24. A polymer compound according to claim 1 , wherein said compound is poly(2,5-bis(3-decylthiophen-2-yl)thieno[3,2-b]thiophene).
25. A polymer compound according to claim 1 , wherein said compound is poly(3,4-didecylthiophene-co-thieno[3,2-b]thiophene).
26. A polymer compound according to claim 1 , wherein said compound is poly(3,6-dioctylthieno[3,2-b]thiophene-co-thieno[3,2-b]thiophene).
27. A polymer compound according to claim 1 , wherein said compound is poly(3,6-dioctylthieno[3,2-b]thiophene-co-thiophene).
28. A polymer compound according to claim 1 , wherein said compound is poly(3,6-dioctylthieno[3,2-b]thiophene-co-bithiophene).
29. A polymer compound according to claim 1 , wherein said compound is poly(3,6-didodecylthieno[3,2-b]thiophene-co-thiophene); poly(3,6-didodecylthieno[3,2-b]thiophene-co-bithiophene); poly(3,6-didodecylthieno[3,2-b]thiophene-co-thieno[3,2-b]thiophene); or poly(3,6-didodecylthieno[3,2-b]thiophene-co-selenophene).