NOVELTY - Substituted polyphenylene amine compounds are new.    USE - In organic electronic device (claimed). The compounds are useful as hole transport materials, electroluminescent materials, and hosts for electroluminescent materials in electronic devices. The electronic devices include organic photoactive electronic devices, such as organic light emitting diodes (OLED) useful in OLED displays; lighting device, luminaire, diode laser; photodetectors, photoconductive cells, photoresistors, photoswitches, phototransistors, phototubes, infrared detectors, biosensors; photovoltaic device, solar cell; transistor, and diodes. Also useful as coating materials for memory storage devices, antistatic films, biosensors, electrochromic devices, solid electrolyte capacitors, energy storage devices such as rechargeable battery, and electromagnetic shielding applications.    ADVANTAGE - The compounds provide improved electroactive compounds for preparation of electronic devices. The compounds have high triplet energies i.e. lowest excited triplet state of a material in eV. Luminescent organometallic materials emit from excited states having mixed singlet and triplet character and are phosphorescent. When organometallic phosphorescent materials are used in light-emitting layer, presence of materials having low triplet energy leads to quenching of phosphorescent emission of greater than 2 eV. This leads to decreased efficiency. Quenching can occur when materials are in electroluminescent layer such as host material, or in layer adjacent to electroluminescent layer such as hole transport layer. The compounds (I) and (I') have triplet energy level of (greater than 2.1, preferably greater than 2.2, especially greater than 2.45, particularly greater than 2.6) eV. Further, the deuterated compounds are less susceptible to degradation by holes, electrons, and/or exitons. Deuteration inhibits degradation of compound during device operation, which in turn leads to improved device lifetime. This improvement is accomplished without sacrificing other device properties. Also, the deuterated compounds frequently have greater air tolerance than non-deuterated analogs. This can result in greater processing tolerance both for preparation and purification of the materials and in formation of electronic devices using the materials. The compounds have hole mobilities and highest occupied molecular orbital (HOMO)/lowest unoccupied molecular orbital (LUMO) energies similar to efficient small molecule hole transport compounds such as N,N'-diphenyl-N,N'-bis(3-methylphenyl)-(1,1'-biphenyl)-4,4'-diamine (TPD) that is applied using vapor deposition technique.    DETAILED DESCRIPTION - Substituted polyphenylene amine compounds of formulae (I) and (I'), are new.    Ar1 and Ar2=aryl;    R1 to R5=D, F, alkyl, aryl, alkoxy, silyl, or crosslinkable group;    R6=H, D, or halo;    a, b, c, d and e=0-4;    f and h=1, or 2;    g=0-2;    n=greater than 0.    An INDEPENDENT CLAIM is included for an organic electronic device (100) comprising: a first electrical contact layer (120), a second electrical contact layer (150), and an active layer between the layers, where the active layer (130, 140) comprises the compound (I) or (I').    DESCRIPTION OF DRAWING(S) - The figure shows the organic electronic device.    Organic electronic device (100)    Anode layer (110)    Hole injection layer (120)    Hole transport layer (130)    Electroactive layer (140)    Electron transport layer (150)    Cathode layer (160)