NOVELTY - Organic light emitting diode (OLED) compounds comprising B-S-A-S-B, where rod-like nuclei A comprises a condensed aromatic ring structure in turn comprising fluorene ring structures condensed with at least one additional fluorene ring structures, where the fluorene ring systems comprised by the condensed aromatic structure are substituted at the 9-position, and where the 9-positions of the fluorenes are not susceptible to oxidation, are new.    USE - The OLED compounds are useful for preparing polymer, structure, light-emitting device display device, OLED, photovoltaic device, dot matrix display device, light emitting or charge transporting material, and light emitting or charge transporting polymer (all claimed).    ADVANTAGE - The OLED compound may be a light emitting material of very high efficiency and may possess other useful properties.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are:    (1) a fluorene compound of formula 1 or 2;    (2) a mixture having two or more components comprising at least one component that is OLED compound or fluorene compound;    (3) a polymer formed by cross-linking a material comprising OLED compound or fluorene compound;    (4) a structure comprising two adjacent layers of the polymer;    (5) a transistor comprising the structure or the polymer;    (6) a structure comprising two regions of the polymers;    (7) a photovoltaic device comprising the structure;    (8) a light-emitting device comprising the polymer;    (9) a display device that comprises the light emitting device;    (10) an OLED comprising an anode, a cathode, and a light emissive layer located between the anode and cathode, where the light emissive layer comprises the polymer;    (11) a layer of material comprised of polymer, where the molecular cores' long axes are aligned tangent to the layer surfaces;    (12) a dot matrix display device comprising an array of patterned OLED elements having the structure;    (13) a device comprising the dot matrix display device and a linear polarizer proximate to the light emitting surface and oriented so as to pass light emitted from the display device;    (14) a device comprising the dot matrix display device and a linear polarizer proximate to the light emitting surface and oriented so as to pass light emitted from the display device;    (15) a device comprising an OLED, and a linear polarizer proximate to the light emitting surface of the OLED and oriented so as to pass light emitted from the OLED;    (16) a light emitting or charge transporting material of the general structure S-A-S, where A is a substantially rigid, rod-shaped molecular core comprising a chain of aromatic or heteroaromatic diradicals represented by -Ar-(-Fl-Ar-)n-, where Fl comprises a fluorene-2,7-diyl diradical spiro substituted at the 9 position on the fluorene ring with an alicyclic ring system, where the alicyclic substituent has no hydrogen substituted on the two carbon atoms immediately adjacent the carbon atom at position 9 in the fluorene ring system, where Ar is selected independently from aromatic or heteroaromatic diradicals or single bonds, and where S are flexible spacer units;    (17) a light emitting or charge transporting polymer of the general structure: T-A-T where A is a substantially linear, covalently bonded chain comprising a chain of aromatic or heteroaromatic diradicals represented by -Ar-(-Fl-Ar-)n-, where T are polymer chain terminating units; and    (18) a method for synthesizing oxidation resistant OLED compounds.    R'=the same and are either ethyl and propyl;    R=selected independently from methyl and ethyl;    X=photocross-linking groups; and    n= 1 or 2.