Abstract: An internally dismantled anti-typhoon soundproof horizontal sliding window, which is fastened to an outer frame body and is provided with at least one outer sliding window and an inner sliding window; it is characterized in that: the outer side of the outer frame body is provided with at least one outer fixing column, an elastically movable top plate is provided on the inside and outside of the outer fixed column; when the two windows are closed, a central control lock can be used to drive the top plate to move through the inner columns of the outer and inner windows inwardly, the top plate squeezes the two inner column clamps tightly; the outer column of the outer frame body is provided with a hook, which can be used for the outer sliding window and the outer column of the inner sliding window; a snap cover that seals the grooves of the outer frame; thus, the window structure can be tightly closed in an all-round way, so as to meet the requirements of windproof, rainproof and sound insulation of the strong t

Abstract: Provided is a triazine-based compound represented by following formula (I).

Abstract: Provided is a triazine-based compound represented by following formula (I).

Abstract: An organic light emitting device is provided. The organic light emitting device includes a first electrode layer, a second electrode layer and a light emitting material layer. The second electrode layer is disposed opposite to the first electrode layer. The light emitting material layer is disposed between the first electrode layer and the second electrode layer, and includes an organic light emitting material and an electron transport material, wherein the electron transport material includes a compound represented by a formula (1) below: in which a group A represents an aromatic ring, a is 1, and a group B represents a nitrogen containing five-membered heterocyclic group and derivatives thereof, and has at least one nitrogen atom connected to a meta-position of the group A.

Abstract: The present invention discloses synthesis of 2,2?-disubstituted 9,9?-spirobifluorene-based triaryldiamine. First, 2,2?-diamino-9,9?-spirobifluorene, a Pd-catalyst as auxiliary and aryl halide BX are provided, wherein X is selected from the group consisting of: Cl, Br and I, B comprises one of the following group: aryl moiety, hetero cycle, multiple fused ring, multiple fused ring with hetero atom(s). Next, a substitution reaction is performed to react the 2,2?-diamino-9,9?-spirobifluorene with the aryl halide BX to produce the 2,2?-disubstituted 9,9?-spirobifluorene-based triaryldiamines. In addition, the present invention discloses organic light emitting devices comprising hole transporting material comprising 2,2?-bis(N,N-disubstituted amino)-9,9?-spirobifluorenes.

Abstract: The present invention discloses synthesis of 2,2?-disubstituted 9,9?-spirobifluorene-based triaryldiamine. First, 2,2?-diamino-9,9?-spirobifluorene, a Pd-catalyst as auxiliary and aryl halide BX are provided, wherein X is selected from the group consisting of: Cl, Br and I, B comprises one of the following group: aryl moiety, hetero cycle, multiple fused ring, multiple fused ring with hetero atom(s). Next, a substitution reaction is performed to react the 2,2?-diamino-9,9?-spirobifluorene with the aryl halide BX to produce the 2,2?-disubstituted 9,9?-spirobifluorene-based triaryldiamines. In addition, the present invention discloses organic light emitting devices comprising hole transporting material comprising 2,2?-bis(N,N-disubstituted amino)-9,9?-spirobifluorenes.

Abstract: A substituted oligofluorene for organic light-emitting diode (OLED) and organic photoconductor (OPC) has a chemical structure of: wherein X and Y are an integer of 0 or 1, G1 and G2 are independently of either CnH2n+1 or CnH2n+1O; and n is an integer of 0 to 16.

Abstract: Disclosed is an air-tight sound-proof window which is composed of an external frame, an inner sash and an outer window frame, wherein hollow steel reinforced concrete and sound-absorbing materials are internally installed in the frame of the external frame, the inner sash and the outer sash, and then iron bars are drilled in the center of the head horizontal jamb and the bottom horizontal jamb in the external frame, and afterwards, hidden screen grooves are installed in the border, and then moveable spacers and telescopic tracks are also installed in between the head horizontal jamb and the bottom horizontal jamb so that the inner sash and the outer sash can slide leftward and rightward and the sashes can also simultaneously move inward in such a way that the sashes are completely coupled to the rubber bars encircled around the inner border of the external frame so as to achieve air tightness.

Abstract: Disclosed herein is a two stage compressive spring operated door check hinge. It has two springs of different length equipped along an outer tube to serve two stage restoring force. A unique design of collaborated function of the set billets and the corresponding containment holes enable the door to pause at a desired position. An adjustable nut is provided to adjust the elastic force of two springs such that the operation of the door can be carried out smoothly and silently without installing an awkward articulated door check arm.