US 12,122,950 B2
Fluorescent rare earth complex and security medium using the same
Hiroki Iwanaga, Yokohama (JP); and Kenji Miyazaki, Komae (JP)
Assigned to KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATION, Kawasaki (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATION, Kawasaki (JP)
Filed on May 31, 2023, as Appl. No. 18/326,054.
Application 18/326,054 is a continuation of application No. 16/818,726, filed on Mar. 13, 2020, granted, now 11,702,591.
Claims priority of application No. 2019-163001 (JP), filed on Sep. 6, 2019.
Prior Publication US 2023/0303919 A1, Sep. 28, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 11/06 (2006.01); C07F 5/00 (2006.01); C07F 9/53 (2006.01); F21K 2/00 (2006.01)
CPC C09K 11/06 (2013.01) [C07F 5/003 (2013.01); C07F 9/5345 (2013.01); F21K 2/00 (2013.01); C09K 2211/182 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A rare earth complex, represented by the following formula (1):

OG Complex Work Unit Chemistry
wherein:
each Ar is independently an aryl group,
each R is independently an alkyl group having 6 to 10 carbon atoms,
each RF is independently a halogenated hydrocarbon group,
n is an integer of 3 to 5,
p is an integer of 1 or 2,
q is an integer of 1 to 3,
M is a europium (III) ion, and
X is absent when q is 3 but is an anion having a valence of 3-q when q is 1 or 2.