US4394858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photochemical conversion and storage of light energy by endoergic isomerizations
Assignee: BP Corp North America Inc
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Filing: 1980-12-31
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Granted: 1983-07-26
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Expires: 2000-12-31
Abstract
Abstract A process is provided for the capture and storage of radiant energy in highly strained carbon containing ring structures of isomerizable compounds. The process includes exposing a photocatalyst containing a compound of a metal selected from Re, Ir, Rh, Ru, Os, Pt, Pd and mixtures thereof, to radiant energy in the presence of an isomerizable compound capable of forming strained intramolecular ring structures.
Inventors
- 👤 Paul J. Giordano
- 👤 Richard C. Smierciak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:30
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/16; Y; Y10; Y10S; Y10S204/00; Y10S204/90
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
66 words
A process for the capture and storage of radiant energy comprising exposing an oxidatively stable photocatalyst to said radiant energy in the presence of a reversibly isomerizable carbon containing compound, wherein said photocatalyst comprises a carbonyl compound of a metal selected from Re, Ir, Rh, Ru, Os, Pt and Pd and wherein said isomerizable compound is capable of forming an intramolecular strained carbon containing ring structure.
Claim 2
Dependent Claim
66 words
A process for the capture and storage of radiant energy comprising exposing an oxidatively stable photocatalyst to said radiant energy in the presence of a reversibly isomerizable carbon containing compound, wherein said photocatalyst comprises a carbonyl compound of a metal selected from Re, Ir, Rh, Ru, Os, Pt and Pd and wherein said isomerizable compound is capable of forming an intramolecular strained carbon containing ring structure.
Claim 3
Dependent Claim
21 words
A process as in claim 1, wherein said photocatalyst is contacted with said isomerizable compound in the presence of a solvent.
Claim 4
Dependent Claim
21 words
A process as in claim 1, wherein said isomerizable compound has an activation energy of at least 62 kilocalories per mole.
Claim 5
Dependent Claim
29 words
A process as in claim 1, wherein said photocatalyst contains an organic ligand capable of accepting a redistribution of electron density from said metal upon absorbance of radiant energy.
Claim 6
Dependent Claim
15 words
A process as in claim 1, wherein said photocatalyst includes a salt of said metal.
Claim 7
Dependent Claim
83 words
A process as in claim 1, wherein said photocatalyst has the formula X.sub.2 Me(CO).sub.3 L.sub.b wherein Me is selected from Re, Ir, Rh, Ru, Os, Pt, Pd and mixtures thereof, X is selected from Cl, Br, I and mixtures thereof, L is selected from substituted and unsubstituted olefins, substituted and unsubstituted aromatics, and substituted and unsubstituted aromatic heterocyclic compounds having at least one of oxygen or nitrogen in the heterocyclic ring, and mixtures thereof; and wherein a=1 to 2 and b=0.5 to 10.
Claim 8
Dependent Claim
13 words
A process as in claim 1, wherein said radiant energy is solar radiation.
Claim 9
Dependent Claim
14 words
A process as in claim 1, wherein said isomerizable compound comprises bicyclo (2.2.1) hepta-2,5-diene.
Claim 10
Dependent Claim
19 words
A process as in claim 1, wherein said isomerizable compound is selected from carboxylic acid and ester substituted norbornadienes.
Claim 11
Dependent Claim
15 words
A process as in claim 1, wherein said photocatalyst comprises ClRe(CO) 3 (4-phenylpyridine) 2 .
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-25 | 1987-01-24 | 1987-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-25 | 1991-01-24 | 1991-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-25 | 1995-01-24 | 1995-07-26 | $7700.00 | Window Closed / Lapsed |