Abstract:
Photographic elements are described which contain a release compound that during photographic processing provides an imagewise distribution of a photographically inert compound which can react with a uniform distribution of a second compound contained in the element to form a photographically active compound.
Abstract:
There are described color photographic elements containing novel release compounds which rapidly release a photographically useful group, such as a development inhibitor, from a timing group.
Abstract:
An organic light-emitting diode device (OLED) comprises a cathode, a light-emitting layer, and an anode in that order, in which there is located a first layer (L1) adjacent to the light-emitting layer on the anode side and a second layer (L2) adjacent to L1 on the anode side, in which: (a) layer L1 comprises a benzidine derivative (B1) having an oxidation potential of 0.8-0.9 V; and (b) layer L2 comprises a benzidine derivative (B2) having an oxidation potential greater than 0.7 V and exhibiting a glass transition temperature, Tg, of greater than 125° C.
Abstract:
Photographic compound (A) capable of releasing a photographically useful group is represented by the formula: SOL-CAR-LINK-PUG wherein SOL is a water-solubilizing group; CAR is a carrier moiety that, upon reaction with oxidized developing agent, is capable of releasing LINK-PUG and capable of forming a compound that is washed out of the photographic element during photographic processing; LINK-PUG is in turn capable of releasing a photographically useful group (PUG) during photographic processing and LINK-PUG is represented by the formula: ##STR1## wherein X, R.sub.1, R.sub.2, R.sub.3, R.sub.4 and PUG are as defined in the application. The photographic compound (A) enables formation of easily removable compounds in photographic elements and processes that provide images having improved acutance.
Abstract:
Novel cyanoalkylpiperazines are prepared by reacting piperazine with a haloalkylnitrile in the presence of an acid acceptor. The novel cyanoalkylpiperazines are advantageously employed to prepare 1-(cyanoalkyl)-4-(2-pyrimidyl)piperazines by reacting them with halopyrimidines in the presence of an acid acceptor.
Abstract:
A tandem OLED includes an anode and a cathode. The OLED also includes at least two electroluminescent units disposed between the anode and the cathode, wherein each of the electroluminescent units includes at least one hole -transporting layer and one organic light-emitting layer. An intermediate connector is disposed between adjacent electroluminescent units, wherein the intermediate connector includes an n-doped organic layer and an electron-accepting layer, the electron-accepting layer being disposed closer to the cathode than the n-doped organic layer, and wherein the electron-accepting layer includes one or more organic materials, each having a reduction potential greater than −0.5 V vs. a Saturated Calomel Electrode, and wherein the one or more organic materials constitute more than 50% by volume of the electron-accepting layer.
Abstract:
There are described photographic elements containing novel release compounds which release a blocked photographically useful group, such as a blocked development inhibitor. The blocking group is removed during processing as a result of reaction with sulfite ion contained in one of the processing baths.
Abstract:
There are described color photographic elements containing novel release compounds which rapidly release a photographically useful group, such as a development inhibitor, from a timing group.
Abstract:
Novel 1-(cyanoalkyl)-4-guanylpiperazine acid salts are prepared by reacting novel 1-(cyanoalkyl)piperazines with cyanamide in the presence of an acid. The novel 1-(cyanoalkyl)-4-guanylpiperazine acid salts are advantageously employed to prepare 1-(cyanoalkyl)-4-(2-pyrimidyl)piperazines by reacting them with malonaldehyde in an acidic medium.
Abstract:
Novel 2-pyrimidyl alkanesulfonates are prepared by reacting a 2-hydroxypyrimidine acid salt with an alkanesulfonyl chloride in the presence of an acid acceptor. The novel 2-pyrimidyl alkanesulfonates are advantageously employed to prepare 1-(cyanoalkyl)-4-(2-pyrimidyl)piperazines by reacting them with a novel 1-(cyanoalkyl)piperazine in the presence of an acid acceptor.