A polyimide-polybenzoxazole precursor solution, a polyimide-polybenzoxazole film, and a method of manufacturing the film are disclosed. A polyimide-polybenzoxazole film manufactured using the polyimide-polybenzoxazole precursor solution is formed by copolymerizing a unit structure of diamine and dianhydride and a unit structure of diaminophenol and dicarbonyl chloride in an organic solvent. The film is colorless and transparent, like conventional polyimide films, and can exhibit improved heat resistance and low birefringence.

A light emitting device having an anode, a cathode, a first organic layer and a second organic layer disposed between the anode and the cathode is provided. The first organic layer is a layer containing a light emitting material represented by the formula (T) and the second organic layer is a layer containing a crosslinked body of a polymer compound containing a crosslink constitutional unit wherein the variable groups are as defined in the specification: ##STR00001##

Systems and methods for sorting recyclable items and other materials are provided. In one embodiment, a system for sorting objects comprises: at least one imaging sensor; a controller comprising a processor and memory storage, wherein the controller receives image data captured by the image sensor; and at least one pusher device coupled to the controller, wherein the at least one pusher device is configured to receive an actuation signal from the controller. The processor is configured to detect objects travelling on a conveyor device and recognize at least one target item traveling on a conveyor device by processing the image data and to determine an expected time when the at least one target item will be located within a diversion path of the pusher device. The controller selectively generates the actuation signal based on whether a sensed object detected in the image data comprise the at least one target item.

A copolymer comprising a repeat unit A, wherein repeat unit A comprises ##STR00001##
a repeat unit B, wherein repeat unit B comprises ##STR00002##
and
at least one optional repeat unit D, wherein repeat unit D comprises an aryl group. In this copolymer, X.sub.1, X.sub.2, X.sub.3, and X.sub.4 are independently selected from the group consisting of: H, Cl, F, CN, alkyl, alkoxy, ester, ketone, amide and aryl groups and R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are independently selected from the group consisting of: H, Cl, F, CN, alkyl, alkoxy, alkylthio, ester, ketone and aryl groups.

A method of reacting bis(R.sub.1) 5,5′″-dibromo-3″,4′-difluoro-[2,2′:5′,2″:5″,2′″-quaterthiophene]-3,3′″-dicarboxylate and bis(R.sub.2) 5,5′″-dibromo-3″,4′-difluoro-[2,2′:5′,2″:5″,2′″-quaterthiophene]-3,3′″-dicarboxylate to form the polymer: ##STR00001## In this polymer R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are independently selected from the group consisting of: a halogen, a substituted alkyl, an unsubstituted alkyl, a substituted aryl, an unsubstituted aryl, a substituted heteroaryl and an unsubstituted heteroaryl.

A cyclic olefin copolymer for a medical instrument has an aromatic ring and contains at least one structural unit (A) of the specific formulas (Ia), (II), and (III).

A high-sensitivity, high-selectivity and portable detection method for trace uranyl ion is described. The method has an ultralow detection limit of 11 pM/2.6 ppt and is useful in precise monitoring of the uranium content in agricultural and sideline products, foods, environments and so on. The test instrument is miniaturized and low in cost to achieve high-precision portable measurement in the field. A conjugated polymer with aggregation-induced emission (AIE) activity is synthesized, and prepared into Pdots, and a uranyl-responsive electrochemiluminescence (ECL) probe is developed by modifying the Pdots with DNA or RNA, which serves as an adsorption ligand of uranyl ion. The probe exhibits good biocompatibility. The ECL technology can be used in uranyl ion detection and the method has extremely high sensitivity. A uranyl ion probe with AIE activity is also disclosed, which can be applied in portable precise monitoring of trace uranyl ion by means of the ECL technology.

A film for a light emitting device which is useful for producing a light emitting device having excellent luminance life is described. The film contains a cross-linked body of a crosslinkable material having a crosslinking group in an amount of 0.015 mmol/g to 0.05 mmol/g. A light emitting device containing the film is also described. A method for analyzing a crosslinking group in a film for a light emitting device involves: (1) a step of swelling the above-described film for a light emitting device with a solvent, and (2) a step of measuring a crosslinking group of the swollen film for a light emitting device using nuclear magnetic resonance spectroscopy.

A method of forming a polymer, the method begins by combining 4,7-bis(5-bromo-4-alkylthiophen-2-yl)-5-chloro-6-fluorobenzo[c][1,2,5]thiadiazole, [4-alkyl-5-[5-(trimethylstannyl)thiophen-2-yl]thiophen-2-yl]trimethylstannane, (3,3′-difluoro-[2,2′-bithiophene]-5,5′-diyl)bis(trimethylstannane), Pd.sub.2dba.sub.3 and P(o-tol).sub.3 to form the polymer: ##STR00001##
In this polymer R.sub.1 and R.sub.2 are independently selected from the group consisting of a straight-chain or branched carbyl, silyl, or hydrocarbyl, a branched or cyclic alkyl with 1 to 30 atoms, a fused substituted aromatic ring, and a fused unsubstituted aromatic ring; and the ratio of x is between 0.6 to 0.8 and y is between 0.2 and 0.4.

A composition includes: a compound represented by the following Formula (1); a pigment; and a solvent. In a case where a film having a thickness of 4.0 m is formed using the composition, a maximum value of a light transmittance of the film in a thickness direction in a wavelength range of 360 nm to 700 nm is lower than 40%. In Formula (1), Z.sup.1 represents an (m+n)-valent linking group, Y.sup.1 and Y.sup.2 each independently represent a single bond or a linking group, A represents a group including a pigment adsorption portion, P.sup.1 represents a polymer chain, n represents 1 to 20, m represents 1 to 20, and m+n represents 3 to 21, at least one of Z.sup.1, A.sup.1, or P.sup.1 includes a photocurable group. ##STR00001##