This polarized light-emitting film contains a water-soluble coumarin compound represented by formula (1) (in formula (1), A represents an optionally substituted coumarin skeleton, X represents a sulfo group or a carboxyl group, and n represents an integer of 1 to 3.) or a salt thereof.

##STR00001##

This polarized light-emitting film contains a water-soluble coumarin compound represented by formula (1) (in formula (1), A represents an optionally substituted coumarin skeleton, X represents a sulfo group or a carboxyl group, and n represents an integer of 1 to 3.) or a salt thereof.

##STR00001##

A heterocyclic compound and an organic light-emitting device including the same are provided. The heterocyclic compound is represented by Formula 1: ##STR00001## Details of R1, R2, R3, X1, L1, and a1 and b1 are provided in the disclosure.

A heterocyclic compound and an organic light-emitting device including the same are provided. The heterocyclic compound is represented by Formula 1: ##STR00001## Details of R1, R2, R3, X1, L1, and a1 and b1 are provided in the disclosure.

The present invention relates to rhodamine-type fluorophores being present in two states, a cell-permeable non-florescent form and a fluorescent form. The present invention also relates to use of the fluorophores in staining and live cell fluorescence imaging. The compounds have general formula (10) or the general formula (10′).

The present invention relates to rhodamine-type fluorophores being present in two states, a cell-permeable non-florescent form and a fluorescent form. The present invention also relates to use of the fluorophores in staining and live cell fluorescence imaging. The compounds have general formula (10) or the general formula (10′).

The present specification relates to a composition for forming an optical film comprising a compound represented by Chemical Formula 1 and a binder resin, an optical film, and a display device comprising the same.

An embodiment provides a method for measuring total chlorine in a solution, including: preparing a thiocarbamate indicator; introducing the thiocarbamate indicator to a solution, wherein the solution contains an amount of monochloramine; adding an additive to the solution, wherein the additive accelerates the reaction rate between the thiocarbamate indicator and monochloramine and causes a change in fluorescence of the solution; and measuring the amount of monochloramine in the solution by measuring an intensity of the fluorescence. Other aspects are described and claimed.

Subject-matter of the present invention are novel 3-ketocoumarins, a process for their preparation and their use as photoinitiators in photopolymerization reactions, advantageously in photopolymerization reactions for inkjet printing inks. The invention also concerns a process for the photopolymerization of compositions also comprising said 3-ketocoumarins.

Subject-matter of the present invention are novel 3-ketocoumarins, a process for their preparation and their use as photoinitiators in photopolymerization reactions, advantageously in photopolymerization reactions for inkjet printing inks. The invention also concerns a process for the photopolymerization of compositions also comprising said 3-ketocoumarins.