NOVELTY - Substituted quinazoline derivative (I) excluding 5,12,14,18,20,27-hexaazaheptacyclo(15.11.0.0(3,15).0(4,12).0(6,11).0(20,28).0(21,26))octacosa-1,3(15),4,6(11),7,9,13,16,18,21(26),22,24,27-tridecaene, is new.    USE - (I) is useful as an electron transport material in an electron transport layer, a hole blocking material in a hole blocking layer and/or as an emitter material matrix material in an emitting layer of electronic devices, preferably organic electroluminescent devices (organic light-emitting diode), organic integrated circuits, organic field-effect transistors, organic thin film transistors, organic light emitting transistors, organic solar cells, organic optical detectors, organic photoreceptors, organic field-quench devices, light-emitting electrochemical cells and organic laser diodes (all claimed).    ADVANTAGE - (I) exhibits: high charge carrier mobility and thus it leads to high power efficiency of the electronic devices; high stability; high sublimation stability; high glass transition temperature; and good film forming properties.    DETAILED DESCRIPTION - Substituted quinazoline derivative of formula (I) excluding 5,12,14,18,20,27-hexaazaheptacyclo(15.11.0.0(3,15).0(4,12).0(6,11).0(20,28).0(21,26))octacosa-1,3(15),4,6(11),7,9,13,16,18,21(26),22,24,27-tridecaene, is new.    either R1 = 1-40C alkoxy, 1-40C (thio)alkyl (both linear), 3-40C alkoxy, 3-40C (thio)alkyl (both branched or cyclic), 2-40C alkenyl or 2-40C alkynyl (all optionally substituted by at least one group R3, where in all groups at least one non-adjacent CH2 group may be replaced by -R3C=CR3-, -CC-, Si(R3)2, Ge(R3)2, Sn(R3)2, C=O, C=S, C=se, C=NR3, P(=O)(R3), S=O, S(=O)2, NR3, -O-, -S- or C(=O)NR3, and at least one H may be replaced by D, F, Cl, Br, I, CN or NO2), H, D, F, Cl, Br, I, CHO, N(R3)2, C(=O)R3, P(=O)(R3)2, S(=O)R3, S(=O)2R3, CR3=C(R3)2, CN, NO2, Si(R3)3, B(OR3)2, OS(=O)2R3, SO3H, C(=O)OR3 or OR3; or    R1+R2 = mono- or polycyclic, aliphatic or aromatic ring (where R1 is bonded to R2 in 1,3-position adjacent to R1); either    R2 = 1-40C alkoxy, 1-40C (thio)alkyl (both linear), 3-40C alkoxy, 3-40C (thio)alkyl (both branched or cyclic), 2-40C alkenyl, 2-40C alkynyl (where in all groups at least one non-adjacent CH2 group may be replaced by -R3C=CR3-, -CC-, Si(R3)2, Ge(R3)2, Sn(R3)2, C=O, C=S, C=se, C=NR3, P(=O)(R3), S=O, S(=O)2, NR3, -O-, -S- or C(=O)NR3, and at least one H may be replaced by D, F, Cl, Br, I, CN or NO2), (hetero)aromatic ring with 5-60 aromatic ring atoms, which is optionally fused with the ring to which it is bonded, (hetero)aryloxy group with 5-60 aromatic ring atoms (all optionally substituted by at least one group R3), H, D, F, Cl, Br, I, CHO, N(R3)2, C(=O)R3, P(=O)(R3)2, S(=O)R3, S(=O)2R3, CR3=C(R3)2, CN, NO2, Si(R3)3, B(OR3)2, OS(=O)2R3, SO3H, C(=O)OR3 and/or OR3; or    at least 2R2 = mono- or polycyclic, aliphatic or aromatic ring; either    R3 = 1-20C alkoxy, 1-20C (thio)alkyl (both linear), 3-20C alkoxy, 3-20C (thio)alkyl (both branched or cyclic), 2-20C alkenyl, 2-20C alkynyl (in all groups at least one non-adjacent CH2 group may be replaced by -R4C=CR4-, -CC-, Si(R4)2, Ge(R4)2, Sn(R4)2, C=O, C=S, C=se, C=NR4, P(=O)(R4), S=O, S(=O)2, NR4, -O-, -S- or C(=O)NR 4, and at least one H may be replaced by D, F, Cl, Br, I, CN or NO2), (hetero)aromatic ring with 5-30 aromatic ring atoms, (hetero)aryloxy group with 5-30 aromatic ring atoms (all optionally substituted by at least one group R4), H, D, F, Cl, Br, I, CHO, N(R4)2, C(=O)R4, P(=O)(R4)2, S(=O)R4, S(=O)2R4, CR4=C(R4)2, CN, NO2, Si(R4)3, B(OR4)2, OS(=O)2R4, SO3H, C(=O)OR4 and/or OR4; or    at least 2R3 = mono- or polycyclic, aliphatic or aromatic ring; either    R4 = 1-20C aliphatic, 1-20C (hetero)aromatic organic residue (in both groups at least one H may be replaced by D or F) H, D and/or F; or    at least 2R4 = mono- or polycyclic, aliphatic or aromatic ring; and    A, B1, C1 = substituted 1H-imidazole-1,2-diyl moiety of formula (IIa), where a group R1 is bonded at the positions a and b of (I).    Provided that at least two groups R2 in (I) comprises (hetero)aromatic ring with 5-60 aromatic ring atoms, which is optionally fused with the ring to which it is bonded, 2-40C alkenyl or 2-40C alkynyl (both completely conjugated and all optionally substituted by at least one group R3). INDEPENDENT CLAIMS are also included for:    (1) preparing (I);    (2) a formulation comprising at least one compound (I) and at least one solvent; and    (3) a mixture comprising at least one compound (I) and at least one phosphorescent emitter compound.