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 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:
Metal values are extracted from aqueous solutions containing halide or pseudohalide anion using optionally substitued benzimadazoles, imidazoles and tetrahydrobenzimidazoles having as substituent on the nitrogen in the 1- position the group -C=O.R 2 , -C=O.OR 2 , -SO 2 R 2 or -C=.NR 3 R 4 , where R 2 is a hydrocarbyl group containing from 5 to 36 carbon atoms and R 3 and R 4 are separately hydrogen or a hydrocarbyl group and R 3 and R 4 together contain from 5 to 36 carbon atoms. Useful for the solvent extraction of zinc and copper from chloride leach solutions.
摘要:
Amphiphilic compounds and oligomers and polymers derived therefrom suitable for Langmuir Blodgett deposition having the general formula
where M is a molecular moiety. x and y may be the same or different and are between 1 and 6, preferably 2 or 3, B₁ and B₂ may be the same or different and are chosen from phenyl, alkylphenyl or any molecular moiety made hydrophobic by attachment of a group containing from 8 to 40, preferably 10 to 20, carbon atoms. P is selected from a C₁ to C₆ alkyl group,
Q is selected from a C₁ to C₆ alkyl group,
where B₃ and B₄ may be the same or different from B₁ and B₂ and are chosen from the same list of substituent groups with the proviso that when the compound contains only 2 nitrogen atoms in the chain both B₁ and B₂ must be molecular moieties made hydrophobic by attachment of a group containing 8 to 40 carbon atoms and when the compound contains only 3 nitrogen atoms at least one of B₁, B₂, B₃ or B₄ must be a molecular moiety made hydrophobic by attachment of a group containing 8 to 40 carbon atoms. The compounds can be used to form non-centro symmetric bilayers and are useful for forming various non-linear optical elements.
摘要:
Metal values are extracted from aqueous solutions containing halide or pseudohalide anion using 1,1'-substituted 2,2'-biimidazole or bibenzimidazole compounds. Useful for the solvent extraction of zinc and copper from chloride leach solutions.
摘要:
Metal values are extracted from aqueous solutions containing halide or pseudohalide anion using optionally substitued benzimadazoles, imidazoles and tetrahydrobenzimidazoles having as substituent on the nitrogen in the 1- position the group -C=O.R 2 , -C=O.OR 2 , -SO 2 R 2 or -C=.NR 3 R 4 , where R 2 is a hydrocarbyl group containing from 5 to 36 carbon atoms and R 3 and R 4 are separately hydrogen or a hydrocarbyl group and R 3 and R 4 together contain from 5 to 36 carbon atoms. Useful for the solvent extraction of zinc and copper from chloride leach solutions.
摘要翻译:使用任选取代的苯并恶唑,咪唑和四氢苯并咪唑在含有卤化物或拟卤化物阴离子的水溶液中提取金属值,所述苯并恶唑在1-位上具有取代基的基团是-C = O .R2,-C = O.OR2,-SO2R2或 -C = NRR2R4,其中R2是含有5-36个碳原子的烃基,R3和R4分别是氢或烃基,R3和R4一起含有5-36个碳原子。 适用于从氯化浸出溶液中溶剂萃取锌和铜。