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  • C07D519/00—Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups C07D453/00 or C07D455/00
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  • C08F226/06—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen by a heterocyclic ring containing nitrogen
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  • H10K10/46—Field-effect transistors, e.g. organic thin-film transistors [OTFT]
  • H10K10/462—Insulated gate field-effect transistors [IGFETs]
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  • H10K85/615—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
  • H10K85/626—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene

Definitions

• organic-based devices can operate efficiently and at high speed if both p-type (where the charge carriers are substantially holes) and n-type (where the charge carriers are substantially electrons) semiconductor materials exhibit high carrier mobility and stability over time under ambient conditions, and can be processed in a cost- effective manner.
• n-type semiconductor materials are perylene and naphthalene diimides (PDIs and NDIs, respectively).
• PDIs and NDIs perylene and naphthalene diimides
• fullerenes unsubstituted perylene dianhydrides and PDIs, bearing only hydrogen atoms in the bay position (1-, 6-, 7-, and 12-positions), are considered to be the archetype of n-type semiconductor materials.
• Their application in solar cell devices, xerographic photoreceptors, and OFETs has been demonstrated. See e.g. Tang, CW. (1986), Appl. Phys. Lett, 48: 183; Law, K.Y. (1993), Chem. Rev., 93: 449; and Forrest, R.F.
• the present teachings provide organic semiconductor materials that are based upon compounds that include fused ring tetracarboxylic imide moities. It has been found that dimeric and polymeric compounds based upon fused ring tetracarboxylic imides can afford useful electrical properties while offering broad viscosity ranges suitable for various solution-phase processes.
• the present teachings provide a dimeric compound having the formula: Q Q' wherein Q and Q' are independently a fused ring tetracarboxylic imide and L is a linker connecting the two Q and Q' groups. L can be a symmetrical or unsymmetrical linker as described below.
• the present teachings provide a polymeric compound having at least one repeating unit that includes a pendant group of the formula L-Q, where for each repeating unit including a pendant group L-Q, each Q independently is a fused ring tetracarboxylic imide, and each L independently is a linker or a covalent bond.
• the present teachings provide a copolymeric compound having at least one repeating unit that includes a pendant group of the formula L-Q, where for each repeating unit including a pendant group L-Q, each Q independently is a fused ring tetracarboxylic imide, and each L independently is a linker or a covalent bond.
• the copolymeric compound can have at least one other repeating unit that does not include the pendant group L-Q.
• compositions, articles, structures, and devices that include the dimeric compounds, the polymeric compounds, and the copolymeric compounds disclosed herein.
• Figure 1 provides UV-vis absorption spectra of solutions and thin films comprising compounds of the present teachings.
• Figure 2 provides a photoluminescence spectrum of a solution comprising compounds of the present teachings.
• Figure 3 provides differential scanning calorimetry (DSC) curves obtained from a compound of the present teachings.
• Figure 4 provides a thermogravimetric analysis (TGA) of a compound of the present teachings.
• the present teachings relate to organic semiconducting compounds, methods for preparing the same, as well as to compositions, articles, structures, and devices that include such compounds.
• the present teachings provide solution-processable, e.g., spin-coatable and printable, organic semiconductor materials (e.g., compounds and compositions) that exhibit useful electrical properties that can be used to fabricate various organic electronic articles, structures and devices.
• organic semiconductor materials disclosed herein can be considered n-type semiconductor materials and can be used, among other applications, to build complementary circuits or circuitry that includes an n-type semiconductor material of the present teachings and a p-type semiconductor that is either inorganic or organic.
• the present teachings provide dimeric and polymeric compounds that are based upon fused ring tetracarboxylic imides. These dimeric and polymeric compounds typically have at least some solubility in one or more common solvents and can be stable in ambient conditions. The present teachings also provide compositions, articles, structures, and devices that include these compounds.
• compositions are described as having, including, or comprising specific components, or where processes are described as having, including, or comprising specific process steps, it is contemplated that compositions of the present teachings also consist essentially of, or consist of, the recited components, and that the processes of the present teachings also consist essentially of, or consist of, the recited process steps.
• dimer or “dimeric compound” refers to a molecule composed of two identical or similar moities covalently linked together.
• the two identical or similar moities are represented by Q (and Q'), and a linker L is used to covalently link the two moities together.
• polymer or “polymeric compound” refers to a molecule consisting of at least three repeating units (monomers) connected by covalent chemical bonds.
• the polymer or polymeric compound can have only one type of repeating unit as well as two or more types of repeating units. In the latter case, the term “copolymer” or “copolymeric compound” can be used herein instead, especially when the polymer includes chemically significantly different repeating units.
• a polymer typically comprises a backbone with optional pendant groups. Unless specified otherwise, the assembly of the repeating units in the copolymer can be head-to-tail, head-to-head, or tail-to-tail.
• the copolymer can be a random copolymer, an alternating copolymer, or a block copolymer.
• a formula similar to the one below can be used to represent a copolymer, and such formula should be interpreted to embrace a copolymer having any repeating pattern consisting of x % of Q 1 , y % of Q 2 , and z % of Q 3 , where Q 1 , Q 2 , and Q 3 are different repeating units:
• fused ring refers to a polycyclic ring system having at least two rings where at least one of the rings is aromatic and such aromatic ring (carbocyclic or heterocyclic) has a bond in common with at least one other ring that can be aromatic or non-aromatic, and carbocyclic or heterocyclic.
• aromatic ring carbocyclic or heterocyclic
• These polycyclic ring systems can be highly ⁇ -conjugated and can include, without limitation, rylenes having the formula:
• acenes which are linear fused benzene rings and can be represented by the formula:
• b can be an integer in the range of 1-7, examples of which include, but are not limited to, naphthalenes, anthracenes, tetracenes, pentacenes, and hexacenes; and coronenes, which have the formula:
• tetracarboxylic imide refers to a compound having a
• fused ring tetracarboxylic imide refers to a molecule comprising a polycyclic ring system having at least two rings where at least one of the rings is aromatic and such aromatic ring (carbocyclic or heterocyclic) has a bond in common with at least one other ring that can be aromatic or non-aromatic and that can be carbocyclic or heterocyclic, and a
• the -C ( O ) -N-C ( O ) - g r0U p and the -C(O)-Z-C(O)- group generally are not adjacent to each other, and typically are present on two different rings.
• halo or halogen refers to fluoro, chloro, bromo, and iodo.
• amino refers to -NH 2 , an -NH-alkyl group, an -N(alkyl) 2 group, an -NH-arylalkyl group, an -N(alkyl)-arylalkyl group, and an -N(arylalkyl) 2 group, and is within the definition Of-NR 1 R 2 , wherein R 1 and R 2 are as defined herein.
• alkoxy refers to -O-alkyl group, and is within the definition of -OR 3 , wherein R 3 is as defined herein.
• alkoxy groups include, but are not limited to, methoxy, ethoxy, propoxy (e.g., n-propoxy and isopropoxy), t-butoxy groups, and the like.
• alkylthio refers to an -S-alkyl group.
• alkylthio groups include, but are not limited to, methylthio, ethylthio, propylthio (e.g., n-propylthio and isopropylthio), t-butylthio groups, and the like.
• esteer refers to both an -O-C(O)-alkyl group and a -C(O)-O-alkyl group, where the former group is within the definition of -OC(O)R 3 , and R 3 is as defined herein.
• alkyl refers to a straight-chain or branched saturated hydrocarbon group.
• alkyl groups include methyl (Me), ethyl (Et), propyl (e.g., n-propyl and isopropyl), butyl (e.g., n-butyl, isobutyl, s-butyl, t-butyl), pentyl groups (e.g., n-pentyl, isopentyl, neopentyl), and the like.
• an alkyl group can have 1 to 20 carbon atoms, i.e., a Ci -20 alkyl group.
• an alkyl group can have 1 to 6 carbon atoms, and can be referred to as a "lower alkyl group.”
• lower alkyl groups include methyl, ethyl, propyl (e.g., n-propyl and isopropyl), and butyl groups (e.g., n-butyl, isobutyl, s-butyl, t-butyl).
• haloalkyl refers to an alkyl group having one or more halogen substituents.
• haloalkyl groups include, but are not limited to, CF 3 , C 2 F 5 , CHF 2 , CH 2 F, CCl 3 , CHCl 2 , CH 2 Cl, C 2 Cl 5 , and the like.
• Perhaloalkyl groups i.e., alkyl groups wherein all of the hydrogen atoms are replaced with halogen atoms (e.g., CF 3 and C 2 F 5 ), are included within the definition of "haloalkyl.”
• a Ci -20 haloalkyl group can have the formula -C n X 2n - or -C n H 2n-t X t -, wherein X is F, Cl, Br, or I, n is an integer in the range of 1 to 20, and t is an integer in the range of 0 to 40, provided that t is less than or equal to 2n.
• alkenyl refers to a straight-chain or branched alkyl group having one or more carbon-carbon double bonds.
• alkenyl groups include, but are not limited to, ethenyl, propenyl, butenyl, pentenyl, hexenyl, butadienyl, pentadienyl, hexadienyl groups, and the like.
• the one or more carbon- carbon double bonds can be internal (such as in 2-butene) or terminal (such as in 1 - butene).
• an alkenyl group can have 2 to 20 carbon atoms, i.e., a C 2-20 alkenyl group.
• alkynyl refers to a straight-chain or branched alkyl group having one or more triple carbon-carbon bonds.
• alkynyl groups include, but are not limited to, ethynyl, propynyl, butynyl, pentynyl, and the like.
• the one or more triple carbon-carbon bonds can be internal (such as in 2-butyne) or terminal (such as in 1-butyne).
• an alkynyl group can have 2 to 20 carbon atoms, i.e., a C 2-20 alkynyl group.
• cycloalkyl refers to a non-aromatic carbocyclic group including cyclized alkyl, alkenyl, and alkynyl groups.
• a cycloalkyl group can be monocyclic (e.g., cyclohexyl) or polycyclic (e.g., containing fused, bridged, and/or spiro ring systems), wherein the carbon atoms are located inside or outside of the ring system. Any suitable ring position of the cycloalkyl group can be covalently linked to the defined chemical structure.
• cycloalkyl groups include, but are not limited to, cyclopropyl, cyclopropylmethyl, cyclobutyl, cyclopentyl, cyclohexyl, cyclohexylmethyl, cyclohexylethyl, cycloheptyl, cyclopentenyl, cyclohexenyl, cyclohexadienyl, cycloheptatrienyl, norbornyl, norpinyl, norcaryl, adamantyl, and spiro[4.5]decanyl groups, as well as their homologs, isomers, and the like.
• heteroatom refers to an atom of any element other than carbon or hydrogen and includes, for example, nitrogen, oxygen, sulfur, phosphorus, and selenium.
• cycloheteroalkyl refers to a non-aromatic cycloalkyl group that contains at least one ring heteroatom selected from O, N and S, and optionally contains one or more double or triple bonds.
• One or more N or S atoms in a cycloheteroalkyl ring may be oxidized (e.g., morpholine N-oxide, thiomorpholine S-oxide, thiomorpholine S,S-dioxide).
• nitrogen atoms of cycloheteroalkyl groups can bear a substituent, for example, a hydrogen atom, an alkyl group, or other substituents as described herein.
• Cycloheteroalkyl groups can also contain one or more oxo groups, such as piperidone, oxazolidinone, pyrimidine-2,4(lH,3/f)-dione, pyridin-2(lH)-one, and the like.
• oxo groups such as piperidone, oxazolidinone, pyrimidine-2,4(lH,3/f)-dione, pyridin-2(lH)-one, and the like.
• Examples of cycloheteroalkyl groups include, among others, morpholine, thiomorpholine, pyran, imidazolidine, imidazoline, oxazolidine, pyrazolidine, pyrazoline, pyrrolidine, pyrroline, tetrahydrofuran, tetrahydrothiophene, piperidine, piperazine, and the like.
• aryl refers to an aromatic monocyclic hydrocarbon ring system or a polycyclic ring system in which two or more aromatic hydrocarbon rings are fused (i.e., having a bond in common with) together or at least one aromatic monocyclic hydrocarbon ring is fused to one or more cycloalkyl and/or cycloheteroalkyl rings.
• An aryl group can have from 6 to 14 carbon atoms in its ring system, which can include multiple fused rings.
• a polycyclic aryl group can have from 7 to 14 carbon atoms. Any suitable ring position of the aryl group can be covalently linked to the defined chemical structure.
• aryl groups having only aromatic carbocyclic ring(s) include, but are not limited to, phenyl, 1-naphthyl (bicyclic), 2-naphthyl (bicyclic), anthracenyl (tricyclic), phenanthrenyl (tricyclic), and like groups.
• polycyclic ring systems in which at least one aromatic carbocyclic ring is fused to one or more cycloalkyl and/or cycloheteroalkyl rings include, among others, benzo derivatives of cyclopentane (i.e., an indanyl group, which is a 5,6-bicyclic cycloalkyl/aromatic ring system), cyclohexane (i.e., a tetrahydronaphthyl group, which is a 6,6-bicyclic cycloalkyl/aromatic ring system), imidazoline (i.e., a benzimidazolinyl group, which is a 5,6-bicyclic cycloheteroalkyl/aromatic ring system), and pyran (i.e., a chromenyl group, which is a 6,6-bicyclic cycloheteroalkyl/aromatic ring system).
• heteroaryl refers to an aromatic monocyclic ring system containing at least 1 ring heteroatom selected from oxygen (O), nitrogen (N) and sulfur (S) or a polycyclic ring system where at least one of the rings present in the ring system is aromatic and contains at least 1 ring heteroatom.
• Polycyclic heteroaryl groups include two or more heteroaryl rings fused together and monocyclic heteroaryl rings fused to one or more aromatic carbocyclic rings, non- aromatic carbocyclic rings, and/or non-aromatic cycloheteroalkyl rings.
• a heteroaryl group, as a whole, can have, for example, from 5 to 14 ring atoms and contain 1-5 ring heteroatoms.
• heteroaryl group can be attached to the defined chemical structure at any heteroatom or carbon atom that results in a stable structure.
• heteroaryl rings do not contain 0-0, S-S, or S-O bonds.
• one or more N or S atoms in a heteroaryl group can be oxidized (e.g., pyridine N-oxide, thiophene S-oxide, thiophene S,S-dioxide).
• heteroaryl groups include, for example, the 5-membered monocyclic and 5-6 bicyclic ring systems shown below:
• K is O, S, NH, N-alkyl, N-aryl, or N-(arylalkyl) (e.g., N-benzyl).
• heteroaryl rings include, but are not limited to, pyrrole, furan, thiophene, pyridine, pyrimidine, pyridazine, pyrazine, triazole, tetrazole, pyrazole, imidazole, isothiazole, thiazole, thiadiazole, isoxazole, oxazole, oxadiazole, indole, isoindole, benzofuran, benzothiophene, quinoline, 2-methylquinoline, isoquinoline, quinoxaline, quinazoline, benzotriazole, benzimidazole, benzothiazole, benzisothiazole, benzisoxazole, benzoxadiazole, benzoxazole, cinnoline,
• Compounds of the present teachings can include a "divalent group” defined herein as a linking group capable of forming a covalent bond with two other moieties.
• compounds of the present teachings can include a divalent Ci -20 alkyl group, such as, for example, a methylene group.
• LG refers to a charged or uncharged atom (or group of atoms) that can be displaced as a stable species as a result of, for example, a substitution or elimination reaction.
• leaving groups include, but are not limited to, halide (e.g., Cl, Br, I), tosylate (toluenesulfonyl group, TsO), mesylate (methanesulfonyl group, MsO), brosylate (p- bromobenzenesulfonyl group, BsO), nosylate (4-nitrobenzenesulfonyl group, NsO), water (H 2 O), ammonia (NH 3 ), and triflate (trifluoromethanesulfonyl group, OTf).
• halide e.g., Cl, Br, I
• tosylate toluenesulfonyl group, TsO
• mesylate methanesulfonyl group, MsO
• brosylate p- bromobenzenesulfonyl group, BsO
• nosylate 4-nitrobenzenesulfonyl group, Ns
• Ci -6 alkyl is specifically intended to individually disclose Ci, C 2 , C 3 , C 4 , C 5 , C 6 , Ci-C 6 , Ci-C 5 , Ci-C 4 , Ci-C 3 , Ci-C 2 , C 2 -C 6 , C 2 -C 5 , C 2 -C 4 , C 2 -C 3 , C 3 -C 6 , C 3 -C 5 , C 3 -C 4 , C 4 -C 6 , C 4 -C 5 , and C 5 -C 6 alkyl.
• an integer in the range of 0 to 40 is specifically intended to individually disclose 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, and 40, and an integer in the range of 1 to 20 is specifically intended to individually disclose 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 and 20.
• One aspect of the present teachings provides a dimeric compound having the formula:
• Q and Q' are covalently linked by a linker moiety L.
• Q and Q' are independently a fused ring tetracarboxylic imide, and L has the formula of A-B-A' or B-A-B', wherein:
• a and A' are independently a divalent Ci -20 alkyl group, a divalent Ci -20 haloalkyl group, or a covalent bond; and B and B 1 are independently -O- -S-, -S(O)-, -C(O)-, -NR a - -C(O)NR 3 -,
• R a is H, a Ci -6 alkyl group, a C 6-I4 aryl group, or a -Ci -6 alkyl-C 6- i 4 aryl group; and p is an integer in the range of 1 to 20.
• the linker moiety L as a whole is generally not a covalent bond, i.e., at least one of A, A', B, and B' is not a covalent bond.
• L can be a symmetrical linker, i.e., A and A' in A-B-A' (or alternatively, B and B' in B-A-B) can be the same.
• unsymmetrical linkers can also be used.
• the dimeric compound can have the formula:
• B, B', Q and Q' are as defined herein.
• B and B' can both be a covalent bond, i.e., the two monomers Q and Q' are linked by a straight chain propyl linker group.
• L can be a divalent branched alkyl group, for example, a divalent 2,2-dimethyl propyl group, or a divalent haloalkyl group, for example a divalent 2,2-difluoropropyl group.
• B and B' can be a heteroatom-containing group, or a cyclic moiety as described herein.
• the monomers Q and Q' can have various fused ring cores including, but not limited to, various rylenes, acenes, and other highly ⁇ -conjugated fused ring systems. These fused ring cores can be unsubstituted or substituted, e.g., in the bay position and/or in the terminal position.
• Q and Q' can independently have the formula of:
• Z at each occurrence, is independently O, S, S(O), NR b , C(O), SiR c R d or CR c R d , wherein:
• R b is a) H, b) -C(0) m 0R e , c) -C(O) m R f , d) -C(0)NR f R g , e) -C(S)OR 6 , f) -C(S)R f , g) -C(S)NR f R g , h) -S(O) m R f , i) -S(O) m OR f , j) a C 1-20 alkyl group, k) a C 2-20 alkenyl group, 1) a C 2-20 alkynyl group, m) a -Y-C 3 .
• each of the Ci -20 alkyl group, the C 2-20 alkenyl group, the C 2-2O alkynyl group, the C 3-I0 cycloalkyl group, the C 6-I4 aryl group, the 3-12 membered cycloheteroalkyl group, and the 5-14 membered heteroaryl group is optionally substituted with 1-4 R h groups;
• R c and R d are independently a) H, b) a halogen, c) -(CH 2 CH 2 O) q H, d) -(CH 2 CH 2 O) q -CH 3 , e) a Ci -20 alkoxyl group, f) a Ci -20 alkyl group, g) a C 2-20 alkenyl group, h) a C 2-20 alkynyl group, i) a -Y-C 3- Io cycloalkyl group, j) a -Y-C 6-I4 aryl group, k) a -Y-3-12 membered cycloheteroalkyl group, or 1) a -Y-5-14 membered heteroaryl group, wherein each of the Ci -2O alkyl group, the C 2-2O alkenyl group, the C 2-2O alkynyl group, the C 3-I0 cycloalkyl group, the C 6-I4 aryl group
• R e is a) H, b) -C(O)R f , c) -C(0)NR f R ⁇ , d) -C(S)R f , e) -C(S)NR f R 8 , f) a C -20 alkyl group, g) a C 2-20 alkenyl group, h) a C 2-20 alkynyl group, i) a C 3-I0 cycloalkyl group, j) a C 6-H aryl group, k) a 3-12 membered cycloheteroalkyl group, or 1) a 5-14 membered heteroaryl group, wherein each of the Ci -20 alkyl group, the C 2-20 alkenyl group, the C 2-20 alkynyl group, the C 3-I0 cycloalkyl group, the C 6-I4 aryl group, the 3-12 membered cycloheteroalkyl group, and the 5-14 member
• R f and R g are independently a) H, b) -OH, c) -SH, d) -S(O) 2 OH, e) -C(O)OH, f) -C(O)NH 2 , g) -C(S)NH 2 , h) -OC 2-10 alkyl, i ) -C(O)-C 1-20 alkyl, j) -C(O)-OC 1-20 alkyl, k) -C(S)N(C 1-20 alkyl) 2 , 1) -C(S)NH-C 1-20 alkyl, m) -C(O)NH-C 1-20 alkyl, n) -C(O)N(C 1-20 alkyl) 2 , o) -S(O) n -Ci -20 alkyl, p) -S(O) n -OC 1-20 alkyl, q) a C
• R h is independently a) a halogen, b) -CN, c) -NO 2 , d) oxo, e) -OR 1 , f) -SR 1 , g) -NR 1 RJ, h) -N(O)R 1 R 1 , i) -S(O) 01 R 1 , j) -S(O) 0n OR 1 , k) -S(O) 111 NR 1 R ⁇ 1) -C(O)R 1 , m) -C(O)OR 1 , n) -C(0)NR j R j , o) -C(S)NR 1 RJ, p) SiH 3 , q) SiH(C 1-20 alkyl) 2 , r) SiH 2 (C 1-20 alkyl), s) Si(Ci -20 alkyl) 3 , t) a Ci -20 alkyl group,
• R 1 and R J are independently a) H, b) -S(O) 2 OH, c) -C(O)OH, d) -C(O)NH 2 , e) -C(S)NH 2 , f) -C(O)-C 1-20 alkyl, g) -C(O)-OCi -20 alkyl, h) -C(S)N(Ci -20 alkyl) 2 , i) -C(S)NH-C 1 -20 alkyl, j) -C(O)NH-C 1-20 alkyl, k) -C(O)N(C 1-20 alkyl) 2
• R at each occurrence, is independently a) a halogen, b) -CN, c) -NO 2 , d) oxo, e) -OH, f) -NH 2 , g) -NH(C -20 alkyl), h) -N(C -20 alkyl) 2 , i) -N(C -20 alkyl)-C 6-14 aryl, j) -N(C 6-14 aryl) 2 , k) -S(O) 1n H, 1) -S(O) 111 -C 1-20 alkyl, m) -S(O) 2 OH, n) -S(O) 01 -OC 1-20 alkyl, o) -S(O) 01 -OC 6-14 aryl, p) -CHO, q) -C(O)-C 1-20 alkyl, r) -C(O)-C 6-14 aryl, s)
• R m at each occurrence, is independently a) H, b) halogen, c) -CN, d) -NO 2 , e) -OR 1 , f) -SR 1 , g) -NR'R J , h) -N(O)R'R J , i) -S(O) 111 R 1 , j) -S(O) 111 OR 1 , k) -S(O) m NR'R J , 1) -C(O)R', m) -C(O)OR 1 , n) -C(O)NR 1 R- 1 , o) -C(S)NR 1 R 1 , p) SiH 3 , q) SiH(C 1-20 alkyl) 2 , r) SiH 2 (C 1 -20 alkyl), s) Si(C -20 alkyl) 3 , t) a C 1-20 alkyl group, u
• Y, R 1 , R J , R k and m are as defined above.
• a, b, c, d, e, f, g and h, at each occurrence, can be independently CR m , N or P, where R m is as defined herein.
• R m is as defined herein.
• each of a, b, c, d, e, f, g and h can be CR m
• R m at each occurrence, can be independently H, -CN, -OR', a halogen, a Ci -20 haloalkyl group, or a 3-12 membered cycloheteroalkyl group, wherein the 3-12 membered cycloheteroalkyl group can be optionally substituted with 1-4 R k groups, and R 1 and R k are as defined herein.
• each of a, b, c and d can be CR m , where R m , at each occurrence, can be independently H, Br, Cl, -CN, CF 3 , N-pyrrolidine, or a 3,5-di-tert-butylphenoxyl group.
• R m at each occurrence, can be independently H, Br, Cl, -CN, CF 3 , N-pyrrolidine, or a 3,5-di-tert-butylphenoxyl group.
• Q and Q' can independently have the formula:
• Q and Q' can be a fused ring tetracarboxylic diimide, that is, Z, in each of the formulae of Q and Q' provided herein, can be NR b , where R b is a Ci -2O alkyl group, a Ci -2O haloalkyl group, a C 2-20 alkenyl group, a C 3-I o cycloalkyl group, a C 6-I4 aryl group, or a 3-12 membered cycloheteroalkyl group, each of which can be optionally substituted with 1-4 R h groups.
• R b is a Ci -2O alkyl group, a Ci -2O haloalkyl group, a C 2-20 alkenyl group, a C 3-I o cycloalkyl group, a C 6-I4 aryl group, or a 3-12 membered cycloheteroalkyl group, each of which can be optionally substituted with 1-4
• R b can be a straight chain Ci -2O alkyl group, a branched C 3-20 alkyl group, a C 4-20 alkenyl group, a Ci -20 fluoroalkyl group, a C 3-I0 cycloalkyl group, a -Y-C 6-I4 aryl group, or a 3-12 membered cycloheteroalkyl group, wherein the C 6-I4 aryl group and the 3-12 membered cycloheteroalkyl group can be optionally substituted with 1 -4 R h groups, and Y is as defined herein.
• R b can be -C 8 Hi 7 , -C] 2 H 25 , -CH(C 6 H, 3 ) 2 , -CH(Ci iH 23 ) 2 , -CH 2 C 3 F 7 , -CH 2 C 7 Fi 5 , a cyclohexyl group, a benzyl group, a 4-butyl benzyl group, a 2,3,4,5,6-pentafluorophenyl group, or a 3,4,5- tris(dodecyloxy)phenyl group.
• the present teachings provide a polymeric compound that includes a polyalkylene backbone or a substituted polyalkylene backbone. More specifically, one or more repeating units of the polymeric compound can include a pendant group having the formula L-Q, where L and Q are as defined above. In some embodiments, the linker L can be a covalent bond.
• the polyalkylene backbone or the substituted polyalkylene backbone can be polyethylene, polypropylene, polystyrene, polyphenol, polyvinylalcohol, polyacrylate, or a copolymer thereof.
• such polymeric compounds can be a homopolymer having only repeating units of L-Q.
• such polymeric compounds can be a copolymer having repeating units of L-Q and L'-Q'. Respectively, these embodiments can be represented by the formulae:
• R and R' are independently H, OH, -C(O)OH, a Ci -6 alkyl group, a phenyl group, or a phenol group;
• Q' is a fused-ring tetracarboxylic imide
• L' has the formula A-B-A 1 or B-A-B', wherein: A and A' are independently a divalent Ci -20 alkyl group, a divalent Ci -20 haloalkyl group, or a covalent bond; and
• B and B' are independently -O-, -S-, -S(O)-, -C(O)-, -NR a - -C(O)NR 3 -, -NR 3 C(O)- -O-(CH 2 CH 2 O)p- -SiR a 2 - a C 6- , 0 cycloalkyl group, a C 6-14 aryl group, a 5-12 membered cycloheteroalkyl group, a 5-14 membered heteroaryl group, or a covalent bond, wherein:
• the present teachings provide a copolymeric compound that includes at least two types of repeating units, one of which includes the pendant group L-Q, where L and Q are as defined herein.
• the other repeating unit can be an alkylene, a substituted alkylene, and a heteroalkylene that does not include the pendant group L-Q.
• These copolymeric compounds can be represented by the formula:
• R, R', R" and R'" are independently H, OH, -C(O)OH, a C 1-6 alkyl group, a phenyl group, or a phenol group;
• a compound can be considered soluble in a solvent when at least 1 mg of the compound is soluble in 1 mL of the solvent.
• the fundamental parameters controlling printing quality are the rheological properties of the inks and the chemical characteristics, mainly those affecting the surface energy, of the material on which the ink is deposited.
• the wetting contact angle determines the spread of a liquid drop on the surface and depends on the relative surface energy of the solid- liquid, solid-vapor, and liquid-vapor interfaces.
• high-energy surfaces result in a small contact angle and considerable substrate wetting, while a low substrate surface energy results in greatly reduced ink droplet footprint.
• the surface energy and contact angle also relate to the adhesion of the liquid to the surface. Strong adhesion is associated with wetting and low adhesion with large contact angles.
• Small molecule-based inks such as those of simple PDI and NDI derivatives generally are well suited for inkjet printing since low viscosity inks can be used.
• contact printing techniques can offer higher printing speed, and to date, the use of contact printing with organic electronics has been limited by the lack of high- viscosity formulations of organic electronic inks.
• Solubility requirements can also differ for contact and noncontact printing techniques.
• noncontact printing techniques such as inkjet printing, the solubility requirement is generally less stringent and a solubility range as low as about 1 -4 mg/mL can suffice.
• a higher solubility range may be necessary, often in the range of about 50-100 mg/mL.
• Other contact printing techniques such as screen- printing and flexo printing, can require even higher solubility ranges, e.g., about 100-1000 mg/mL.
• linkers and the polymeric backbone can be affected by considerations such as the intermolecular and intramolecular ordering of the semiconductor materials disclosed herein.
• efficient perylene unit core-core stacking is known to be a prerequisite for efficient charge transport
• ⁇ - ⁇ core stacking can occur intermolecularly and intramolecularly.
• the optimal distance for efficient charge hopping between aromatic units has been determined to be between about 3.2-3.5 A.
• linkers and polymeric backbones that can lead to a molecular arrangement having such an intermolecular and/or intramolecular distance can be advantageous, which was observed with an optionally substituted propyl linker in the dimer embodiment, and an optionally substituted polyethylene backbone in the polymer embodiment of the present teachings.
• Monomer precursors before reacting with the linker L or the polymeric backbone to form the dimeric and polymeric compounds disclosed herein, generally have somewhat different chemical structures compared to Q and Q'.
• the monomer precursors can include different functional groups at their terminal ends.
• these monomer precursors can be fused ring tetracarboxylic acids, dianhydrides, and other derivatives.
• Exemplary monomer precursors that can be used to prepare the dimerfc and polymeric compounds of the present teachings include, but are not limited to the following: [0068] Compounds of the present teachings can be prepared following three general synthetic routes illustrated in Scheme 1 below.
• the present teachings further provide compositions that include the compounds disclosed herein dissolved in an organic solvent.
• Various articles of manufacture such as thin film semiconductors, organic field effect transistors, complementary metal oxide semiconductors (CMOS), complementary inverters, D flip-flops, and ring oscillators, that make use of the organic semiconducting compounds disclosed herein are also with the scope of the present teachings.
• CMOS complementary metal oxide semiconductors
• ring oscillators that make use of the organic semiconducting compounds disclosed herein are also with the scope of the present teachings.
• Example 1 Preparation of N-(l-hexyIheptyl)perylene-3,4,9,10- tetracarboxylic-3,4-anhydride-9,10-imide
• Scheme 2 illustrates an exemplary synthetic route for preparing a monomer precursor that can be used in accordance with the present teachings.
• the filter cake was rinsed with warm 10% K 2 CO 3 until the filtrate was clear, rinsed twice with 100 mL of 2M HCl, then rinsed thoroughly with water and dried at 13O 0 C.
• the dry solid was suspended in 100 mL of boiling water, and triethylamine (TEA) was added until a dark purple solution of the desired product formed.
• TAA triethylamine
• the remaining starting material was filtered off and the dark purple filtrate was acidified with 3 volumes of 2M HCl, and stirred overnight.
• the resulting dark red precipitate was filtered, rinsed thoroughly with water, and dried at 13O 0 C. This material was similarly treated once more with water/TEA to remove remaining traces of the starting material.
• Example 2 Preparation of N-(l-hexylheptyl)perylene-3,4,9,10- tetracarboxylic-3,4-anhydride-9,10-imide dimer 4
• Scheme 3 illustrates an exemplary synthetic route for the preparation of N-(I -hexylheptyl)perylene-3, 4,9,10-tetracarboxylic-3,4-anhydride- 9,10-imide dimer 4.
• N-(l-hexylheptyl)perylene-3,4,9,10- tetracarboxylic-3,4-anhydride-9,10-imide 3 400 mg, 0.69 mmol
• 1,3- diaminopropane 23 ⁇ L, 0.27 mmol
• the reaction mixture was cooled, suspended in 5 mL of ethanol (EtOH), then treated with 40 mL of 2M HCl and stirred overnight.
• the black precipitate was filtered and dried at 130 0 C to give N-(l-hexylheptyl)perylene- 3,4,9,10-tetracarboxylic-3,4-anhydride-9,10-imide dimer 4 as a black solid (315 mg, 39%).
• Example 3 Preparation of N-(l-hexylheptyl)perylene-3,4,9,10- tetracarboxylic-3,4-anhydride-9,10-imide polymer 5
• Scheme 4 illustrates an exemplary synthetic route for the preparation of N-( 1 -hexylheptyl)perylene-3 ,4,9,10-tetracarboxylic-3 ,4-anhydride- 9,10-imide polymer 5.
• N-(l-hexylheptyl)perylene-3, 4,9,10- tetracarboxylic-3,4-anhydride-9,10-imide 3 800 mg, 1.4 mmol
• polyaminoethylene 0.1 mmol
• the reaction mixture was cooled, added into EtOH (20 mL), then treated with 50 mL of 2M HCl and stirred overnight.
• the black precipitate was filtered and dried at 13O 0 C to give the N-(l-hexylheptyl)perylene-3, 4,9,10- tetracarboxylic-3,4-anhydride-9,10-imide polymer 5 as a brown solid (160 mg).
• Example 4 Optical properties of dimers of N-(I- hexylheptyl)perylene-3,4,9,10-tetracarboxylic-3,4-anhydride-9,10-imide 4
• Figure 1 shows the UV-vis absorption spectra of a solution and a thin film sample of the N-(l-hexylheptyl)perylene-3,4,9,10-tetracarboxylic-3,4- anhydride-9,10-imide dimer 4.
• the absorption maxima of the dimer were observed to be located at 523 nm.
• the thin film samples showed a blue-shifted absorption maxima, at 496 nm for unannealed thin film and at 462 nm for thin film annealed at 25O 0 C, suggesting that in solid state the dimer achieves a higher degree of molecular organization, namely, crystallinity.
• the band gaps of the dimer in solution, on glass, and as annealed thin film on glass were estimated to be 2.30, 2.02, and 1.93 eV, respectively, from the UV-vis spectra obtained.
• Example 5 Photoluminescence of dimers of N-(I- hexylheptyl)perylene-3,4,9,10-tetracarboxylic-3,4-anhydride-9,10-imide 4
• Figure 2 provides a photoluminescence spectrum of a solution of the N- (1 -hexylheptyl)perylene-3,4,9, 10-tetracarboxylic-3,4-anhydride-9, 10-imide dimer 4 in THF.
• Example 6 Thermal properties of dimers Of N-(I- hexylheptyl)perylene-3,4,9,10-tetracarboxylic-3,4-anhydride-9,10-imide 4
• Thermogravimetric analysis was used to examine the thermal stability of the N-(l-hexylheptyl)perylene-3,4,9,10-tetracarboxylic-3,4-anhydride- 9,10-imide dimer 4.
• TGA Thermogravimetric analysis
• Example 7 Device fabrication and characterization using thin films of dimers of N-(l-hexylheptyl)perylene-3,4,9,10-tetracarboxylic-3,4-anhydride- 9,10-imide 4
• Prime grade n-doped silicon wafers (100) having 300 nm of thermally grown oxide (Process Specialties Inc.) were used as device substrates. These were rinsed with water, methanol, and acetone before film deposition. Trimethylsilyl functionalization of the Si/SiO 2 surface was carried out by exposing the silicon wafers to hexamethyldisilazane (HMDS) vapor at room temperature in a closed container under nitrogen overnight.
• HMDS hexamethyldisilazane

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