The present invention relates to symmetric tetraalkynylated anthracene and more particularly tetraethynylated compounds with Formula III. The invention also provides a tetrafold sonogashira route towards these of symmetric tetraethynylated anthracene compounds with Formula III. The compounds of the present invention show good to excellent synthetic yield and find application in sensors and optoelectronic devices and show positive solvatochrism and halochromism. The sensor uses symmetric tetraalkynylated anthracene as channel material and the sensor has high sensitivity of 19.95 percent to 900 ppm and 0.86 percent to 50 ppm.

A fused aromatic derivative shown by the following formula (1): ##STR00001##
wherein R.sub.a and R.sub.b are independently a hydrogen atom or a substituent, p is an integer of 1 to 8 and q is an integer of 1 to 11, and when p and q are two or more, R.sub.as and R.sub.bs may be independently the same or different, and adjacent substituents R.sub.as may form a ring, L.sub.1 is a single bond or a substituted or unsubstituted divalent linking group, and Ar.sub.1 is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, provided that when L.sub.1 is a single bond and at least one of R.sub.as is not a hydrogen atom, Ar.sub.1 is not a triphenylenyl group, and provided that substituents of L.sub.1 and Ar.sub.1, and R.sub.a and R.sub.b contain no amino group.

Provided is a compound for imparting a thermal plasticity to an organic silicon resin. The compound is a novel vinyl silane compound represented by the following formula (1):

##STR00001##

wherein A independently represents a divalent hydrocarbon group having 1 to 6 carbon atoms; Y independently represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 12 carbon atoms.

One of the purposes of the present invention is to provide a curable resin composition which has good curability and provides a cured product having a sufficient hardness, in particular an addition-curable organic silicon resin composition. The present invention provides a curable resin composition comprising the following components (A) to (C): (A) an organic-silicon compound having at least two alkenyl groups in a molecule, (B) an organic silicon compound which is represented by the formula (I) and has at least three hydrosilyl groups each bonded to the carbon atom of the benzene ring in an amount such that a ratio of the number of the hydrosilyl group in component (B) to the number of the alkenyl group in component (A) is 0.4 to 4,

##STR00001##

and (C) a hydrosilylation catalyst in a catalytic amount.

The present invention provides soluble, stable singlet fission (SF) compounds, compositions, materials, methods of their use, and methods for their preparation that provide efficient intramolecular singlet fission (iSF) and multiple excitons. The SF compound may be a dimer, an oligomer, or a polymer of polyoligoacenes, where for example, the compound achieves a triplet yield reaching about 200% per absorbed photon. In this system, SF does not depend on intermolecular inter-actions. Instead, SF is an intrinsic property of the molecule and therefore occurs independent of intermolecular interactions. Singlet fission has the potential to significantly improve the photocurrent in single junction solar cells and thus raise the Shockley-Queisser power conversion efficiency limit from about 33% to about 46% or greater. Quantitative SF yield at room temperature has only been observed in crystalline solids or aggregates of higher acenes.

Disclosed herein are embodiments of aryl compounds and polymers thereof that are made using methods that do not require harsh conditions or expensive reagents. The methods disclosed herein utilize precursor compounds that can be polymerized to form polycyclic aromatic hydrocarbons and polymers, such as carbon-based polymers like nanostructures (e.g., graphene or graphene-like nanoribbons).

A compound that emits fluorescence and delayed fluorescence is provided as a material for an organic electroluminescent device of high efficiency, and an organic photoluminescent device and an organic electroluminescent device of high efficiency and high luminance are provided using this compound. The compound of a general formula (1) having a diazatriphenylene ring structure is used as a constituent material of at least one organic layer in the organic electroluminescent device that includes a pair of electrodes, and one or more organic layers sandwiched between the pair of electrodes. ##STR00001##

An organic light-emitting material having the structure of formula (I) or (II) as described below and an organic light-emitting device (OLED) are disclosed. The OLED adopts the compound containing fluoranthene group as the electron transport material possessing good electron transport and injection ability. The material also enhances the luminous efficiency and lifetime of the device because of its excellent thermal stability and film-forming properties. At the same time, the high triplet energy and excellent electron transport capacity of the material containing fluoranthene group make it suitable to be used as the host for phosphorescent devices, increasing the number of electrons in the light-emitting layer and the efficiency of the device. ##STR00001##

We report the synthesis and characterization of novel bistetracenes, an unconventional, linearly extended conjugated core with eight fused rings. Also described are bisoligoacenes. In general, the properties and stability of large polycyclic aromatic hydrocarbons (PAHs) strongly depend on the mode of ring annellation and the topology of their it-electron systems, which are usually associated with the resonance stabilization energy in large PAHs.

An organic electroluminescence device having good emission efficiency is provided. The organic electroluminescence device includes an amine compound which includes a benzofluorene structure and an aryl group and/or a heteroaryl group, wherein the benzofluorene structure has a specific substituent at 9-position of the fluorene ring.