| US 7,566,783 B2 | ||
| Long wavelength long lifetime luminophores | ||
| Joseph R Lakowicz, 10037 Fox Den Rd., Ellicott City, Md. 21042 (US) | ||
| Appl. No. 10/88,646 PCT Filed Jul. 23, 2001, PCT No. PCT/US01/23034 § 371(c)(1), (2), (4) Date Aug. 30, 2002, PCT Pub. No. WO02/07779, PCT Pub. Date Jan. 31, 2002. |
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| Claims priority of provisional application 60/219659, filed on Jul. 21, 2000. | ||
| Claims priority of provisional application 60/246954, filed on Nov. 09, 2000. | ||
| Prior Publication US 2004/0039158 A1, Feb. 26, 2004 | ||
| Int. Cl. C09B 19/00 (2006.01); C07F 15/00 (2006.01); C07D 213/79 (2006.01) | ||
| U.S. Cl. 546—10 [424/9.6; 544/64; 544/225; 546/8] | 1 Claim |
| 1. A luminophore comprising a donor portion (D) in close association with an acceptor portion (A) sufficient for resonant
energy transfer therebetween, wherein upon excitation by external electromagnetic radiation of a wavelength shorter than λ1, said luminophore emits luminophore radiation in the range of about 450 to about 1200 nm of a wavelength longer than λ1, with an emission lifetime t1 and a quantum yield Q1,
wherein when D is not in said close association with A, it absorbs radiation of a wavelength λ2 shorter than λ1 and thereafter emits radiation with a quantum yield Q2 less than about 0.2,
wherein when said donor portion is in said close association with A and is excited by electromagnetic radiation of wavelength
shorter than λ1, it resonantly transfers energy to said acceptor portion A which then resonantly emits radiation of a wavelength longer than
λ1 with said emission lifetime t1 and quantum yield Q1, which is substantially greater than Q2,
wherein said luminophore is a chemical compound, wherein D is covalently linked to A, and has the formula:
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