Novel quinone compounds 1-3 with extended π-conjugate system shown in Figure 1 have been designed as an electron transporting compound for fabricating single-layer organic photoreceptors (OPC) useful for positive charging. We synthesized them and examined their properties. They showed suitable electron accepting properties and good compatibilities to a binder resin. The electron transporting behavior will be discussed based on the fundamental experiments of its electric field, temperature, and inter-molecular distance dependencies in molecularly doped system, and analyzed applicability of small-polaron hopping to electron transport in the materials.