A process for detecting oil or lubricant contamination in the production of an article by adding a Stokes-shifting taggant to an oil or lubricant of a machine utilized to produce the article or a component thereof, irradiating the articles produced with a first wavelength of radiation, and monitoring the articles for emission of radiation at a second wavelength. The taggant can be in the form of a composition containing a Stokes-shifting taggant, which absorbs radiation at a first wavelength and emits radiation at a second wavelength, different from said first wavelength, dissolved or dispersed in an oil or lubricant.

Embodiments of the present disclosure pertain to methods of monitoring an environment for the presence of a solvent by: (i) exposing the environment to a luminescent compound, where the relative luminescence emission intensity of the luminescent compound changes upon interaction with the solvent; and (ii) monitoring a change in the relative luminescence emission intensity of the luminescent compound, where the absence of the change indicates the absence of the solvent from the environment, and where the presence of the change indicates the presence of the solvent in the environment. The luminescent compounds include a phosphorous atom with one or more carboxyl groups, where the carboxyl groups are coordinated with one or more metallic ions (e.g., lanthanide ions and yttrium ions). The present disclosure also pertains to sensors for monitoring an environment for the presence of a solvent, where the sensors include one or more of the aforementioned luminescent compounds.

A dendrimer compound characterized by comprising a core represented by the following formula (1-1), (1-2), (1-3), or (1-4) and at least one kind of dendritic structure selected among dendritic structures represented by the following formulae (3) and (4). ##STR00001##

A pearlescent pigment for security purposes according to an embodiment of the present invention includes a single or a plurality of coating layers containing a metal oxide and an organic or inorganic fluorescent material. Since the pearlescent pigment for security purposes according to the present disclosure includes a fluorescent layer containing the organic or inorganic fluorescent material, it can be used as a pigment for security purposes due to its optical characteristics and can also provide effects such as magnetism, high color intensity, multiple colors, etc. Also, since the pearlescent pigment for security purposes has aesthetic benefit and security characteristic at the same time, it is economical, easy to use and applicable in various industries.

An ink composition comprising: a rare-earth complex containing one kind of trivalent rare-earth ion selected from the group consisting of Eu.sup.3+, Tb.sup.3+, Sm.sup.3+, Er.sup.3+, Pr.sup.3+, Ho.sup.3+, Tm.sup.3+ and Dy.sup.3+, and a specific phosphine oxide ligand coordinated to the rare-earth ion, and a light-emitting material different from the rare-earth complex, wherein an absolute value of a difference between a wavelength (1) at which a light emission intensity of the rare-earth complex is maximum and a wavelength (2) at which a light emission intensity of the light-emitting material is maximum, is 50 nm or more.

A process for synthesizing a Mn.sup.4+ doped phosphor of formula I by electrolysis is presented. The process includes electrolyzing a reaction solution comprising a source of manganese, a source of M and a source of A. One aspect relates to a phosphor composition produced by the process. A lighting apparatus including the phosphor composition is also provided. A.sub.x[MF.sub.y]:Mn.sup.4+ (I) where, A is Li, Na, K, Rb, Cs, or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; x is the absolute value of the charge of the [MF.sub.y] ion; and y is 5, 6 or 7.

Detecting physical forensic evidence on a surface includes contacting the surface with a composition, the composition including a rare-earth metal and a chelator. The composition contacting the surface is illuminated with electromagnetic radiation configured to cause the composition to fluoresce in a pattern indicative of physical forensic evidence. The pattern indicative of physical forensic evidence can then be captured. The composition can be made by combining a rare-earth metal, a chelator, and a solvent to form a solution, precipitating the rare-earth metal and the chelator in the solution, and isolating the precipitate of the rare-earth metal and the chelator from a remainder of the solution. The resulting composition includes a porous metal-organic framework of a rare-earth metal and a chelator, where the pores range in diameter from about 0.01 nm to about 50 nm.

The present invention aims to provide a colored luminescent sheet that enables production of a colored glass providing better aesthetic appearance, and a colored luminescent glass including the colored luminescent sheet. Provided is a colored luminescent sheet including: a thermoplastic resin; a colorant; and a luminescent material that emits visible light having a wavelength of 380 to 750 nm under excitation light.

An europium doped Ni(BTC) Metal Organic Framework (MOF), Eu@Ni(BTC), as a sensor for detecting heteroaromatic compounds. Eu@Ni(BTC) shows selectivity towards thiophene and pyrrole with a detection limit of 0.2 and 8.4 ppm for thiophene and pyrrole, respectively. The sensor can be easily regenerated and can be used to analyze thiophene in water.

The present invention provides a reagent for detecting methyl salicylate, which is a plant hormone released when a plant is infected with a disease, in the cultivation of plants including agricultural crops, a methyl salicylate sensor, and a method for sensing methyl salicylate using the same, thereby providing a method for early detection of pathogen infection in a plant.

A reagent for detecting methyl salicylate comprising a terbium compound and a non-volatile ionic liquid. A methyl salicylate sensor for detecting methyl salicylate comprising: a capture section of methyl salicylate having the reagent and a detection section detecting that methyl salicylate has been captured by the capture section.