Abstract:
PROBLEM TO BE SOLVED: To provide a novel crystalline transformation of fipronyl, and a method for producing said crystalline transformation, and also a composition for combating pests and parasites.SOLUTION: Use of a novel crystalline transformation IV of fipronyl of formula I below that exists in a triclinic crystalline system having center symmetric space group P-1. Said fipronyl is dissolved into acetone and crystallized to obtain crystalline transformation IV, and which is used, as it is (crystalline transformation IV), as a composition for controlling pests. High purity fipronyl of said crystalline transformation IV is a raw material for converting to crystalline transformation IV by further tempering the crystalline transformation IV at 90 to 100°C, or to crystalline transformation V by tempering at 100 to 130°C.
Abstract:
PROBLEM TO BE SOLVED: To provide a novel crystalline transformation of fipronyl of the formula below that was found and of which characteristics were determined, and a novel method for producing said crystalline transformation with high yield while excluding the production of other crystalline transformed forms, also a mixture and composition for killing insects and parasites comprising said crystalline transformation, and a method of their use for combating pests and parasites.SOLUTION: A crystalline transformation of fipronyl that has a particular X-ray powder diffraction chart, and undergoes, at 105°C to 145°C, phase transformation to two other crystalline transformations respectively having melting points of 196 to 197°C and 202 to 203°C.
Abstract:
PROBLEM TO BE SOLVED: To provide a fipronyl crystal allowing easy filtration and drying with less dust in a production procedure and a composition which is blended with the crystal, has formulation stability and is for insecticidal and parasiticidal mixtures.SOLUTION: A solid fipronyl is present as a monoclinic system having a center-symmetry space group C2/c, shows a specific reflection in an X-ray powder diffraction diagram recorded at 25°C by using Cu-Kα radiation rays and contains at least 85 wt.% of a crystal transformation I of fipronyl. A method of producing the crystal transformation I comprises dissolving a solid fipronyl different from the crystal transformation I in a solvent selected from one or more of alcohols, acetonitrile(AN), dimethylsulfoxide(DMSO), one or more of benzene derivatives, etc. and crystallizing from the resultant solution. When the solvent is AN, crystallization is carried out at 40°C or lower. When the solvent is DMSO, crystallization is carried out at 80°C or lower.
Abstract:
PROBLEM TO BE SOLVED: To provide a novel crystal-transformed fipronil and an insecticidal and a parasiticidal composition.SOLUTION: A fipronil of a triclinic-system crystal transformation V is obtained by crystallizing a solid-form fipronil of formula (I) with dimethylsulfoxide at 100-150°C or acetonitrile at 60-81°C as solvent. A combination of the fipronil with an other insecticidal or parasiticidal compound provides an insecticidal or a parasiticidal composition having a synergistic effect against a specified target of an insect, an acarid or a parasite. The fipronil can be used as a mixture with a fungicidal compound.
Abstract:
PROBLEM TO BE SOLVED: To provide a novel crystalline modification to pyraclostrobin, and to provide a method for production and use of the novel modification for the production of a plant protection agent.SOLUTION: The crystalline modification II to pyraclostrobin shows at least four reflections represented by formula in an X-ray powder diffraction figure at 25°C.
Abstract:
The present invention relates to a photoactive material comprising a donor substance and an acceptor substance, wherein the donor substance comprises or consists of one or more compounds of formula (I) described herein, or the acceptor substance comprises or consists of one or more compounds of formula (I) described herein, or the donor sub¬ stance comprises or consists of a first compound of formula (I) described herein and the acceptor substance comprises a second compound of formula (I) described herein with the proviso that the first and second compound are not the same, as well as to an organic solar cell comprising said photoactive material. The present invention also relates to a photoelectric conversion device comprising or consisting of two or more organic solar cells comprising said photoactive material and to compounds of formula (I) as described herein for use as donor substance or as acceptor substance in a photoactive material. Further, the present invention relates to the use of a compound of formula (III) as described herein in the synthesis of a compound of formula (I) as described herein.
Abstract:
A photovoltaic element (110) is proposed for conversion of electromagnetic radiation to electrical energy. The photovoltaic element (1 10) may especially be a dye solar cell (1 12). The photovoltaic element (110) has at least one first electrode (1 16), at least one n-semiconductive metal oxide (120), at least one electromagnetic radiation-absorbing dye (122), at least one solid organic p-semiconductor (126) and at least one second electrode (132). The p-semiconductor (126) comprises at least one metal oxide (130).