Cyclic germanium compounds and applications thereof
AssigneeThe Curators of the University of Missouri
InventorsJanet Braddock-Wilking, Teresa Lynn Bandrowsky, James Bryan Carroll, II
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Abstract
The present disclosure provides a new series of compounds exhibiting high fluorescence quantum yields in the solid state. In one embodiment, the compounds include a series of 2,3,4,5-tetraphenylgermoles with the same or different 1,1-substituents. In another embodiment, substituted germafluorenes, germa-fluoresceins/rhodamines, and germapins are described. These germanium heterocycles possess ideal photophysical and thermostability properties, which makes them excellent candidates for chemical or biological sensors, host materials for electroluminescent devices and solar cells, and emissive and/or electron-transport layer components in organic light emitting diode devices.
Claims4
A compound having the formula (II)
- wherein R1 and R2 may be independently selected from the group consisting of aryl, alkyl, halide, alkynyl, and asymmetric derivatives thereof with two different groups at the Ge-center;
- wherein R3 and R6 may be independently selected from the group consisting of Y and
- wherein R4 and R5 may be independently selected from the group consisting of OCH3;
- and Y;
- and
- wherein Y is H,
- wherein Z is F, CH3, or OCH3;
- wherein X is H, CF3, OPh, CH3, Ph, OCH3 or OCF3;
- or
- wherein R is aryl, alkenyl or alkynyl;
- wherein at least one of R3, R4, R5, and R6 is not H;
- with the proviso that R4 and R5 are each phenyl or R3 and R6 are each
- wherein Y is
- wherein X is H, CF3, OPh, CH3, Ph, OCH3, or OCF3.
Dependencies are inferred from the claim text.