摘要:
This invention relates to a photoelectric transfer device which comprises a photoelectric transfer element, a cholesteric liquid crystal layer and an ultraviolet cut-off layer, said cholesteric liquid crystal layer being arranged between said photoelectric transfer element and said ultraviolet cut-off layer and said ultraviolet cut-off layer being arranged at the side for the incidence of light. According to this invention, there is provided a colorful photoelectric transfer device which is prepared at an inexpensive cost without a marked decrease in the generation efficiency of the photoelectric transfer element and is fit to be used over a prolonged period.
摘要:
6-Epithioethyl-3-oxatricyclo [3.2.1.0 2.4 ] octane, a novel compound, is prepared by reaction of the corresponding 6-epoxyethyl-3-oxatricyclo [3.2.1.0 2.4 ] octane with an ammonium or alkali or alkaline earth metal thiocyanate or a thiourea, and is useful as a monomer for preparation of, e.g., heat resistant plastics and plastics for optical use.
摘要:
A traction drive fluid comprising as a base stock at least one hydrocarbon selected from the group consisting of compounds of the following general formulae (I) to (V) wherein R 1 , R 2 and R 3 , independently from each other, represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 , independently from each other, represent a hydrogen atom or a methyl group.
摘要:
The present invention provides a high-density fuel oil which is suitable for rockets and jet engines and which mainly comprises a tetracyclo (7.3.1. 0 2,7 . 1 7,11 ) tetradecane deriva- t i ve represented by the general formula: wherein each of m and n is 0,1 or 2, and the sum of m and n is 2 or less.
摘要:
A process for preparing 4-methyl-1-pentene comprising dimerizing propylene in the presence of a catalyst, characterized in that the catalyst is composed from the treatment of precatalyst by at least one oxygen-containing compound selected from oxygen, alcohols, ethers, acetals, orthocarboxylates and esters. The precatalyst is composed of element or compound selected from sodium, potassium, sodium amide and potassium amide supported on a carrier principally represented by the following formula (1): wherein x has a value in the range of 0.5≦ The use of above mentioned catalyst so remarkably increases the rate of reaction and the selectivity of 4-methyl-1-pentene and allows the reaction rate and selectivity to be kept high for a long period of time.
摘要:
A method of producing a semiconducting material comprises reacting one or more of halogenosilanes with an alkali metal and/or an alkaline earth metal in an inert solvent to give a condensate and thermally decomposing the condensate. The condensate is dissolved in a suitable solvent such as toluene and tetrahydrofuran and applied by casting to a suitable substrate. The resulting semiconductor material in its film form has an optical band-gap (EO) of usually 0.1-4.0 eV.
摘要:
A method of producing a semiconducting material comprises subjecting a selected class of hydrosilane compounds to hydrogenative condensation in the presence of a catalyst comprising at least one of metals or metal compounds of Group 3B-Group 7B or Group 8 of the Periodic Table, a mixture thereof with a specified silyl compound and/or a specified metal hydride. The resulting condensate is dissolved in a suitable solvent and cast over a quartz or stainless steel substrate, or a silicone wafer to provide a thin film having a specified conductivity and a specified optical band-gap (Eo).
摘要:
Silicon-containing organic compounds useful as starting materials of functional polymer materials, as well as a process for preparing the same, are provided. The silicon-containing organic compounds are represented by the following general formula:
where R¹ is a π conjugated type divalent organic group having 2 to 30 carbon atoms, R² is a hydrocarbon group having 1 to 30 carbon atoms, X¹ is a halogen atom, m and n satisfy the conditions of 1 ≦ m ≦ 2 and n ≧ 2, respectively. A compound of the above general formula is prepared by reacting an organometallic compound of the following general formula:
M¹ - R¹ - M²
where M¹ and M² are each a metal selected from Group 1, 2 and 12 metals in the Periodic Table, with a silane compound of the following general formula:
where R² is a hydrocarbon group having 1 to 30 carbon atoms, X¹, X² and X³ are each a halogen atom.