US5156918A
Expired / Lapsed
US
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Self-assembled super lattices
Assignee: Northwestern University
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Filing: 1991-03-28
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Granted: 1992-10-20
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Expires: 2011-03-28
Abstract
Abstract Polymer-based second harmonic generation materials are disclosed, including electric field poled, chromophore-functionalized polyphenylene ethers with second harmonic coefficients (d 33 ) as high as 65×10 -9 esu, Tg≈173° C., and with superior temporal stability of the poling-induced chromophore orientation. Procedures for simultaneously poling and diepoxide cross-linking chromophore-functionalized poly(ρ-hydroxystyrene) are set forth, resulting in a significant improvement in the temporal stability of chromophore orientation. Chromophore immobilization is disclosed involving highly cross-linkable epoxy matrices. In a first procedure chromophore molecules are embedded in a matrix which can be simultaneously poled and thermally cured. In a second procedure, a functionalized high-β chromophore is synthesized for use as an epoxy matrix component.
Inventors
- 👤 Tobin J. Marks
- 👤 DeQuan Li
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:04
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3615; G02F1/3617; B; B05; B05D; B05D1/00; B05D1/18; B05D1/185; B82; B82Y; B82Y30/00; B82Y40/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
47 words
A nonlinear optical material comprising: a defined substrate; an aromatic silane coupling means bonded to said substrate; a chromophore; said coupling means and chromophore forming chromophore arrays on said substrate; and a structural layer to stabilize said chromophore arrays and form a three-dimensional second-order nonlinear optical material.
Claim 2
Dependent Claim
47 words
A nonlinear optical material comprising: a defined substrate; an aromatic silane coupling means bonded to said substrate; a chromophore; said coupling means and chromophore forming chromophore arrays on said substrate; and a structural layer to stabilize said chromophore arrays and form a three-dimensional second-order nonlinear optical material.
Claim 3
Dependent Claim
15 words
The NLO material of claim 1 wherein said aromatic silane coupling means comprises a trihalosilane.
Claim 4
Dependent Claim
25 words
The NLO material of claim 1 wherein said aromatic silane coupling means is formed from R n SiX.sub.(4-n), where R=alkyl and aryl group and X=halogen.
Claim 5
Dependent Claim
23 words
The NLO material of claim 1 wherein said aromatic silane coupling means is formed from compounds selected from the group consisting of: ##STR7##
Claim 6
Dependent Claim
14 words
The NLO material of claim 1 wherein the said structural layer includes polyvinyl alcohol.
Claim 7
Dependent Claim
16 words
The NLO material of claim 1 wherein said defined substrate has polar reactive groups on the
Claim 8
Dependent Claim
14 words
The NLO material of claim 6 wherein said polar reactive groups are hydroxyl groups.
Claim 9
Dependent Claim
26 words
The NLO material of claim 1 wherein said silane coupling means is a bifunctional molecule with two sites of reactivity on opposite ends of the molecule.
Claim 10
Dependent Claim
54 words
The NLO materials of claim 8 wherein said silane coupling means has a first site of reactivity, said first site comprising groups selected from the group consisting of -SiCl 3 , -SiBr 3 , -SiI 3 , Si(OR) 3 , Si(NR 2 ) 3 ,or SiRSH where R is an alkyl group with C=1-10.
Claim 11
Dependent Claim
38 words
The NLO material of claim 8, wherein said silane coupling means has a second site of reactivity, said second site comprising electrophilic and reactive groups selected from the group consisting of alkyl groups (C=1-10), aryl halides, or sulfonates.
Claim 12
Dependent Claim
11 words
The NLO material of claim 1 wherein said chromophore is bifunctional.
Claim 13
Dependent Claim
17 words
The NLO material of claim 1 wherein said chromophore is selected from the group consisting of: ##STR8##
Claim 14
Dependent Claim
16 words
The NLO material of claim 1 wherein the said structural layer comprises a bifunctional silicon reagent.
Claim 15
Dependent Claim
17 words
The NLO material of claim 13 wherein said bifunctional silicon reagent is combined with a polyfunctional reagent.
Claim 16
Dependent Claim
24 words
The NLO material of claim 14 wherein said polyfunctional reagent is selected from the group consisting of polyols, polyamines, and olefins with reactive groups.
Claim 17
Dependent Claim
35 words
The NLO material of claim 13 wherein said silicon reagent is selected from the group consisting of SX 4 or X 3 SiYSiX 3 (X=halide, OR, NR 2 ; R=alkyl group, C=1-10; Y=a bridging group).
Claim 18
Dependent Claim
32 words
A non-linear optical material comprising chromophores coupled to a substrate in a vertical stacking array, and a structural layer bounded to said chromophores in a plane transverse to the vertical stacking direction.
Claim 19
Dependent Claim
32 words
A non-linear optical material comprising chromophores coupled to a substrate in a vertical stacking array, and a structural layer bounded to said chromophores in a plane transverse to the vertical stacking direction.
Claim 20
Dependent Claim
29 words
The NLO of claim 17 wherein said chromophores are coupled to said substrate by an organosilane of the formula R n SiX.sub.(4-n) where R=alkyl and aryl combination and X=halogen.
Claim 21
Dependent Claim
11 words
The NLO of claim 17 wherein said structural layer comprises polyvinylalcohol.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-10-20 | 1996-04-20 | 1996-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-20 | 2000-04-20 | 2000-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-20 | 2004-04-20 | 2004-10-20 | $7700.00 | Window Closed / Lapsed |