Process for preparing aluminum trisquinoline complex

Details Process for preparing aluminum trisquinoline complex Process for preparing aluminum trisquinoline complex

2008-01-22

2008-01-22

Aulakh, Charanjit S. (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C546S006000, C546S178000

Reexamination Certificate

active

07321036

ABSTRACT:
A process for forming the facial isomer of an aluminum trisquinoline complex comprises heating the solid aluminum trisquinoline complex material at a temperature at least 50° C. below the melting point temperature of the solid for a time sufficient to convert the aluminum trisquinoline complex to at least 99 mol % of one polymorph of the facial-isomer that fluoresces with a maximum intensity below 510 nm.

REFERENCES:
patent: 7169484 (2007-01-01), Rajeswaran et al.
patent: 4-85388 (1992-03-01), None
patent: 4-206296 (1992-07-01), None
patent: 03/106422 (2003-12-01), None
Brinkmann, M., et al., “Correlation Between Molecular Packing and Optical Properties in Different Crystalline Polymorphs and Amorphous Thin Films ofmer-Tris(8-hydroxyquinoline)aluminum(III)”, J. Am. Chem. Soc., 2000, pp. 5147-5157.
Cölle, M., et al., “Preparation and Characterization of Blue-Luminescent Tris(8-hydroxyquinoline)aluminum (Alq3), Advanced Functional Materials”, 2003, pp. 108-112.
Rajeswaran, M., et al., “Refinement of the Crystal Structure of the δ-modification of tris(8-hydroxyquinoline)aluminum(III), δ-Al(C9H6NO)3,the blue luminescent Alq3”, Z Kristallogr. NCS 218 (2003), pp. 1-2.
Rajeswaran, M., et al., “Process for Forming a Composite Including an Aluminum Trisquinoline Complex”, USSN 10/834621, filed Apr. 29, 2004.

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