Glucose-sensing luminescent dyes, polymers, and sensors are provided. Additionally, systems including the sensors and methods of using these sensors and systems are provided.

The present disclosure is directed to fluorogenic schiff base-forming dyes capable of detecting analytes containing aldehyde and ketone groups. The dyes contain nucleophilic hydrazinyl appendages and are capable of binding and detecting analytes in situ.

Described herein are molecules for use in organic light emitting diodes. Example molecules comprise at least one moiety A and at least one moiety D. Values and preferred values of the moieties A and D are described herein. The molecules comprise at least one atom selected from Si, Se, Ge, Sn, P, or As.

Compounds comprising phosphorescent metal complexes comprising cyclometallated imidazo[1,2-f]phenanthridine and diimidazo[1,2-a:1,2-c]quinazoline ligands, or isoelectronic or benzannulated analogs thereof, are described. Organic light emitting diode devices comprising these compounds are also described.

Electronic or optoelectronic device comprising a first electrode, a second electro, and an active layer arranged between and in electrical connection with the first and the second electrode. The active layer comprises at least one dye compound, which comprises small-molecule organic solar cells.

Specific compounds, a material, preferably an emitter material, may be suitable for an organic electroluminescence device, and be of formula (I):

##STR00001##

An organic electroluminescence device may include such compounds. An electronic equipment may include such an organic electroluminescence device. A light emitting layer may include at least one host and at least one dopant, the dopant including at least one of such compounds. Such compounds may be used in an organic electroluminescence device.

A compound represented by the following formula (1), wherein in the formula (1), at least one of R.sub.1 to R.sub.8 is a group represented by the following formula (2). ##STR00001##

A colorant for fluorescent labeling which has an absorbance retention calculated with equation (I) of 0.5 or greater. When the colorant for fluorescent labeling is dissolved in an organic solvent and the resultant colorant solution is added to phosphate-buffered saline (PBS), then the resultant colorant dispersion (colorant dispersion I) contains dispersed colorant droplets formed therein which have an average droplet diameter of 500 nm or less. Equation (I): Absorbance retention=A.sub.1/A.sub.0 [In equation (I), A.sub.0 indicates the absorbance, at a maximum-absorption wavelength, of the colorant solution (colorant solution I) obtained by dissolving the colorant for fluorescent labeling in the organic solvent and A.sub.1 indicates the absorbance, at a maximum-absorption wavelength, of the colorant dispersion (colorant dispersion II) obtained by adding the solution of the colorant for fluorescent labeling to PBS, the colorant solution I and the colorant dispersion II being equal in colorant concentration.]

The present specification provides a hetero-cyclic compound and an organic light emitting device including the same.

To provide an electrochromic compound represented by the following general formula (1) where X.sup.1 and X.sup.2 are each independently a carbon atom or a nitrogen atom, R.sup.1, R.sup.2 and R.sup.3 are each independently a halogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted alkoxy group, x is an integer selected from 0 through 3, y and z are each independently an integer selected from 0 through 4, and at least one of L.sup.1 and L.sup.2 is a monovalent functional group bonded to a nitrogen atom of a pyridinium ring directly, or via a divalent substituent.

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