Abstract: The present invention relates to a nonlinear fluorescent molecule that generates a nonlinear fluorescence reaction by incidence of excitation light. This nonlinear fluorescence molecule includes donors and, and an acceptor that is coupled to the donors and. As the donor is excited by the incidence of the excitation light, electric charge moves from the donor to the acceptor. Then, the donor and the acceptor form a charge separated state. In a state in which the charge separated state is maintained, the donor fluoresces when transiting from an excited state to a ground state.

Abstract: Provided is a nonlinear optical material, an optical recording material, an optical recording method, a photosensitive material, a photopolymerization initiator, and a photosensitizer. One exemplary aspect of the present invention is a photosensitive material used for photolithography for forming a pattern by irradiating a photoresist with excitation light which includes a donor molecule 11 that is excited by the excitation light, and an acceptor molecule 12 that is excited by energy transfer or charge transfer from the excited donor 11.

Abstract: The present invention relates to a nonlinear fluorescent molecule that generates a nonlinear fluorescence reaction by incidence of excitation light. This nonlinear fluorescence molecule includes donors and, and an acceptor that is coupled to the donors and. As the donor is excited by the incidence of the excitation light, electric charge moves from the donor to the acceptor. Then, the donor and the acceptor form a charge separated state. In a state in which the charge separated state is maintained, the donor fluoresces when transiting from an excited state to a ground state.

Abstract: Provided is a nonlinear optical material, an optical recording material, an optical recording method, a photosensitive material, a photopolymerization initiator, and a photosensitizer. One exemplary aspect of the present invention is a photosensitive material used for photolithography for forming a pattern by irradiating a photoresist with excitation light which includes a donor molecule 11 that is excited by the excitation light, and an acceptor molecule 12 that is excited by energy transfer or charge transfer from the excited donor 11.

Abstract: The object of this invention is to improve the safety of an engine by preventing fuel which might splash out of the fuel inlet on top of the fuel tank or drip onto the tank during fueling from coming in contact with the hot cylinder or any electrical components. Another object of this invention is to prevent vibration of the fuel tank and the noise which such vibration would cause. The fuel tank according to this invention has an upper and a lower portions joined by a flange, both of which are made from a resin material. The upper portion has a trapezoidal depression in its center which surrounds the fuel inlet and slopes downward toward one side of the tank. The overall surface of the upper portion is convex and also slopes downward toward the same side of the tank. A number of grooves on either side of the central depression run in the same direction and open onto the same side of the tank. The two halves of the tank are welded at the web of a ribbed flange which extends around the entire periphery.