EP0301725A2
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EP
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Organo metallic compounds of ruthenium iron or cobalt and their use
Assignee: EMI Group Ltd
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Filing: 1988-07-11
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Granted: —
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Expires: 2008-07-11
Abstract
Abstract Langmuir Blodgett films are provided having second order molecular hyperpolarizability of at least 30.10⁻⁵⁰c³m³J⁻². combined with chemical stability and a melting point of over 70°. They also have desirable pyroelectric properties shown by a static pyroelectric coefficient of at least 0.0039 nCcm²k⁻¹. The films comprise compounds of the following formula:- wherein M is ruthenium, iron or cobalt; R¹ is cyclopentadienyl, methylcyclopentadienyl, pentamethylcyclopentadienyl or indenyl; Q¹ is (R²)₃Z or carbonyl; Q² is (R²)₃Z or carbonyl; Z is phosphorus or arsenic; R² is an aryl or alkyl radical; A is Y is a straight chain alkyl or alkoxy radical comprising from 3 to 17 carbon atoms, or, when A is N(R³)₂; R³ is a lower alkyl radical comprising up to 5 carbon atoms; and X is PF₆ or BF₄.
Inventors
- 👤 Stephen Graham Davies
- 👤 Timothy Richardson
- 👤 Gareth Gwynn Roberts
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 09:27
CPC Classifications
H; H10; H10N; H10N15/00; H10N15/10; H10N15/15; C; C07; C07F; C07F15/00; C07F15/0006; C07F15/0046; Y; Y10; Y10T; Y10T428/00; Y10T428/31504
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
93 words
Organo metallic compounds for use in the production of Langmuir-Blodgett films of the following formula:- wherein M is ruthenium, iron or cobalt; R¹ is cyclopentadienyl, methylcyclopentadienyl, pentamethylcyclopentadienyl or indenyl; Q¹ is (R²)₃Z or carbonyl; Q² is (R²)₃Z or carbonyl; Z is phosphorus or arsenic; R² is an aryl or an alkyl radical; A is Y is a straight chain alkyl or alkoxy radical comprising from 3 to 17 carbon atoms, or, when A is N(R³)₂; R³ is a lower alkyl radical comprising up to 5 carbon atoms; and X is PF₆ or BF₄.
Claim 2
Dependent Claim
93 words
Organo metallic compounds for use in the production of Langmuir-Blodgett films of the following formula:- wherein M is ruthenium, iron or cobalt; R¹ is cyclopentadienyl, methylcyclopentadienyl, pentamethylcyclopentadienyl or indenyl; Q¹ is (R²)₃Z or carbonyl; Q² is (R²)₃Z or carbonyl; Z is phosphorus or arsenic; R² is an aryl or an alkyl radical; A is Y is a straight chain alkyl or alkoxy radical comprising from 3 to 17 carbon atoms, or, when A is N(R³)₂; R³ is a lower alkyl radical comprising up to 5 carbon atoms; and X is PF₆ or BF₄.
Claim 3
Dependent Claim
33 words
Compounds according to Claim 1 wherein: M is ruthenium; R¹ is cyclopentadienyl; Q¹ and Q² are both triphenylphosphinyl; A - Y is where n is from 2 to 16; and X is PF₆.
Claim 4
Dependent Claim
54 words
Compounds according to Claim 2 wherein A - Y is where R⁴ is a straight chain alkyl radical containing from 5 to 11 carbon atoms; R⁵ is a straight chain alkyl radical containing from 5 to 14 carbon atoms; and R⁶ is a straight chain alkyl radical containing from 5 to 15 carbon atoms.
Claim 5
Dependent Claim
9 words
A compound according to Claim 1 of the formula:-
Claim 6
Dependent Claim
9 words
A compound according to Claim 1 of the formula:-
Claim 7
Dependent Claim
9 words
A compound according to Claim 1 of the formula:-
Claim 8
Dependent Claim
9 words
A compound according to Claim 1 of the formula:
Claim 9
Dependent Claim
9 words
A compound according to Claim 1 of the formula:-
Claim 10
Dependent Claim
9 words
A compound according to Claim 1 of the formula:-
Claim 11
Dependent Claim
68 words
A process for the preparation of compounds according to Claim 1 wherein a compound of the formula:- wherein M, R¹, Q¹ and Q² have the same significance as in Claim 1 and Hal is halogen is reacted with a compound of the formula:- N≡C - A - Y wherein A and Y have the same significance as in Claim 1 in the presence of PF₆⁻ or BF₄⁻ anion.
Claim 12
Dependent Claim
22 words
A Langmuir-Blodgett film made up of at least one layer comprising a compound according to any one of Claims 1 to 9.
Claim 13
Dependent Claim
33 words
A film according to Claim 11 comprising a plurality of said layers and wherein each layer is alternated with a layer of a fatty acid such as stearic, arachidic, behenic or tricosanoic acid.
Claim 14
Dependent Claim
40 words
A film according to Claim 10 or Claim 11 wherein the said layer or layers comprising the compound according to any one of Claims 1 to 9 also contains a fatty acid such as stearic, arachidic, behenic or tricosanoic acid.
Claim 15
Dependent Claim
34 words
A film according to Claim 13 wherein said fatty acid is behenic acid and the molar ratio of the behenic acid to the said compound is from 0.7 to 1.0 to 0.9 to 1.0.
Claim 16
Dependent Claim
30 words
A chemically stable, cohesively and adhesively invariant Langmuir-Blodgett film according to Claim 11 possessing:- a valve of second order hyperpolarisability of at least 30.10⁻⁵⁰c³m³J⁻²; and a melting point above 70°C.
Claim 17
Dependent Claim
20 words
A Langmuir-Blodgett film according to Claim 15 wherein the value of second order hyperpolarisability is from 300 to 3500 10⁻⁵⁰c³m³J⁻².
Claim 18
Dependent Claim
23 words
A chemically stable, cohesively and adhesively invariant Langmuir-Blodgett film according to Claim 11 possessing a static pyroelectric coefficient of at least 0.0039 nCcm⁻²K⁻¹.
Claim 19
Dependent Claim
18 words
A Langmuir-Blodgett film according to Claim 17 possessing a static pyroelectric coefficient of from 0.035 to 0.30 nCcm⁻²K⁻¹.
Claim 20
Dependent Claim
13 words
A pyroelectric device comprising a film according to Claim 17 or Claim 18.
References Cited (Backward Citations)
No citation records indexed.
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