摘要:
A polymeric minus filter for an incident electromagnetic spectral band comprises at least one polymeric interference stack tuned to a predetermined design wavelength centered around λ₀, wherein λ₀ is in the range of 300 nm to 2000 nm, said filter comprises an optically transparent substrate and having deposited thereon at ambient temperatures (20 to 23°C) a multiplicity of pairs of polymeric thin interference layers plus one final polymeric layer having index of refraction n₂, each pair of interference layers having a total optical thickness equal to 1/2 wavelength of λ₀, the members of each pair having refractive indices n₁ and n₂, respectively, wherein the layer having refractive index n₂ is directly superimposed upon said substrate having refractive index n s and wherein n s is approximately equal to n₁, and wherein n₂
摘要:
A novel hydrazine compound represented by the formula (I) is disclosed.
Also disclosed are a process for preparing the novel hydrazine compound comprising reacting a specific hydrazine compound and a specific acid halide, a nonlinear optical organic material comprising the hydrazine compound represented by the above formula (I), and a nonlinear optical organic element comprising the nonlinear optical organic material. The nonlinear optical organic material shows excellent nonlinear optical effect, and the material is favorably applied to nonlinear optical organic elements such as an optical wavelength conversion element and an electrooptical element.
摘要:
An antistatic film comprising a chemically adsorbed film of straight chain molecules each containing a conductive group and provided on a chargeable substrate via covalent bonds each containing a Si group, said chemically adsorbed film having a conductivity of 10⁻¹⁰ S/cm or above. With the antistatic chemically adsorbed film according to the invention, conductive functional groups are secured via chemically adsorbed molecules and by siloxane bonds to the surface of a substrate material such as ceramics, glass, synthetic resins or synthetic fibers, a film, a plate, an display screen surface, a light-emitting tube. Thus, the film provides an antistatic effect and does not separate. In addition, this chemically adsorbed film has a thickness at the nanometer level and is thus excellently transparent, as well as capable of preventing contamination of the substrate surface due to charging thereof. The film is also excellently durable. Further, when a chemically adsorbed polymer film is formed, a high molecular density, chemically adsorbed film can be obtained.
摘要:
According to the invention, molecules having conductive, photofunctional and other functions are secured by chemical bonds to a substrate via a chemically adsorbed monomolecular film by an adsorption process. The process comprises a step of contacting the substrate with a non-aqueous solution containing a material. The material includes a straight chain molecules having a plurality of chlorosilyl groups at both ends. A reaction occures between hydroxyl groups on the substrate surface and chlorosilyl groups at one of the ends of the material having the chlorosilyl groups. Prior to the reaction the substrate is washed with a non-aqueous organic solution by dipping the substrate in a non-aqueous solution containing molecules having a specific function for causing the reaction of the molecules with the chlorosilyl groups at the other end of the molecules having the chlorosilyl groups, thereby securing the molecules to the surface of the substrate.
摘要:
Disclosed are a polysilane monomolecular film and a polysilane built-up fllm formed by building up a plurality of said monomolecular films, said monomolecular film consisting of a polysilane having a repeating unit represented by general formula (1) given below:
where, R¹ represents a substituted or unsubstituted alkyl group having 1 to 24 carbon atoms or a substituted or unsubstituted aryl group having 6 to 24 carbon atoms, R² represents a divalent hydrocarbon group having 1 to 24 carbon atoms which can be substituted, and X represents hydroxyl group, amino group, carboxyl group, or a hydrophilic group having at least one selected from the group consisting of hydroxyl group, amino group, carboxyl group, amide linkage, easter linkage, carbamate linkage and carbonate bond. The polysilane monomolecular film and built-up film can be formed on a substrate by an LB technique. In the films, the molecules of the polysilane having the repeating unit (1), that is, the Si-Si backbones are oriented in a fixed direction.
摘要:
The use of a multi-functional, chromophore containing, polymerisable compound for producing an optical element having non-linear optical properties (an NLO element) wherein the multi-functional chromophore is a compound capable of being polymerised into a cross-linked network and of being poled under the influence of an electric field whilst being polymerised into the cross-linked network, the compound having the generalised formula (D) (C) (A) (F) D, C, A and F representing covalently linked moieties where C represents at least one conjugated system of π-bonds, A and D represent at least one respectively π-electron acceptor and π -electron donor groups linked at opposite ends of the conjugated system, and are preferably conjugated with the conjugated system of π-bonds (C) and where more than one moiety A, C or D is present they may be the same or different, F represents at least two polymerisable functional groups, which may be the same or different, attached to the π-conjugated system C or the groups A and D via substituent groups R₁ and R₂, where R₁ and R₂ are selected from alkyl, cycloalkyl, aryl heteroalkyl, alkenyl, cycloalkenyl, and alkynyl including groups which have been substituted or contain heteroatom replacement, the groups F being linked to the compound so that after the compound has been polymerised to give a cross-linked network the interpolymerised functional groups prevent significant realignment of the chromophore groups when the optical element is subject to temperature changes during any further fabrication and in use.
摘要:
The invention to provide a chemically adsorbed monomolecular lamination film comprising a chemically adsorbed monomolecular film formed via a siloxane-based monomolecular or polymer film on a substrate surface. It also seeks to provide a method of forming a chemically adsorbed monomolecular film efficiently and with high density on a substrate surface with few hydroxyl groups, which method comprises a step of contacting a substrate containing hydroxyl groups present on the surface with a non-aqueous solution containing a material with plural chlorosilanol groups in molecule, a step of removing the material remaining on the substrate without reaction by washing the substrate with a non-aqueous organic solution (if this process is omitted, the siloxane-based polymer film is prepared on the substrate), a step of forming a monomolecular film constituted by a compound containing a silanol group in molecule on the substrate by exposing to the air containing moisture or washing with water, after the removal step, and a step of laminating a monomolecular adsorption film by adosorbing a chlorosilane-based surface active agent constituted by a straight hydrocarbon chain having a chlorosilane groups at one end onto the substrate after the monomolecular or polymer film formation step.
摘要:
The method of the present invention for forming a monomolecular membrane on a substrate comprises the steps of (1) mixing (a) at least one substance having a water-soluble polar head (hydrophilic portion) and a water-insoluble organic tail (hydrophobic portion) in the molecule, the head being ionizable into a cation when spread on water, and (b) at least one substance having a water-soluble polar head (hydrophilic portion) and a water-insoluble organic tail (hydrophobic portion) in the molecule, the head being ionizable into an anion when spread on water, to obtain a mixture, (2) developing the mixture on an aqueous subphase to form a monomolecular layer, and (3) transferring the monomolecular layer to a substrate while applying a surface pressure to the layer. According to the present invention, there can be formed a unidimensionally controlled membrane which develops a higher function than do the conventional two-dimensionally controlled membranes. Consequently, the method of the present invention can be applied, for example, to the formation of wiring patterns of a molecular level.