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 disclosure relates to a novel compound having an antibacterial function against superbacteria and a hypochlorous acid selective detection function, and a composition and a fluorescent sensor which comprise the same, and more particularly to, a novel imidazoline-2-thione based compound, a composition comprising the same, and a fluorescent sensor for bacterial detection and hypochlorous acid selective detection.

Disclosed are new zwitterionic compounds having a bridge moiety, an electron accepter moiety, and an electron donor moiety. The bridge moiety is covalently bonded to both the electron accepter moiety and to the electron donor moiety. The bridge moiety includes one selected from xanthene and thioxanthene, and the accepter moiety includes a pyridinium moiety, and the donor moiety includes a malononitrile moiety.

The present invention relates to a compound of the following formula (I). The invention also relates to uses thereof as a chromophore as such or for building pigments displaying special optical effects, including metal-like reflection. ##STR00001##

The present invention relates to a compound of the following formula (I). The invention also relates to uses thereof as a chromophore as such or for building pigments displaying special optical effects, including metal-like reflection. ##STR00001##

The present invention provides: a photochromic curable composition which contains (A) a (meth)acrylate composition that contains from 24 to 100% by mass of a polyfunctional (meth)acrylate which has three or more (meth)acryloyl groups in each molecule and (B) a photochromic compound that is obtained by bonding at least one specific naphthopyran to a long-chain group having a number average molecular weight of from 300 to 10,000; and a photochromic optical article which is obtained by polymerizing this photochromic curable composition.

A latent additive which is represented by general formula (1). (In the formula, A represents a five-membered or six-membered aromatic ring or heterocyclic ring; each of R.sup.1 and R.sup.2 independently represents a hydrogen atom, a halogen atom, a cyano group, a hydroxyl group, a nitro group, a carboxyl group, an optionally substituted alkyl group having 1-40 carbon atoms, an aryl group having 6-20 carbon atoms, an arylalkyl group having 7-20 carbon atoms or a heterocyclic ring-containing group having 2-20 carbon atoms; and R.sup.4 represents an alkyl group having 1-20 carbon atoms, an alkenyl group having 2-20 carbon atoms, an aryl group having 6-20 carbon atoms, an arylalkyl group having 7-20 carbon atoms, a heterocyclic ring-containing group having 2-20 carbon atoms or a trialkylsilyl group.)

A latent additive which is represented by general formula (1). (In the formula, A represents a five-membered or six-membered aromatic ring or heterocyclic ring; each of R.sup.1 and R.sup.2 independently represents a hydrogen atom, a halogen atom, a cyano group, a hydroxyl group, a nitro group, a carboxyl group, an optionally substituted alkyl group having 1-40 carbon atoms, an aryl group having 6-20 carbon atoms, an arylalkyl group having 7-20 carbon atoms or a heterocyclic ring-containing group having 2-20 carbon atoms; and R.sup.4 represents an alkyl group having 1-20 carbon atoms, an alkenyl group having 2-20 carbon atoms, an aryl group having 6-20 carbon atoms, an arylalkyl group having 7-20 carbon atoms, a heterocyclic ring-containing group having 2-20 carbon atoms or a trialkylsilyl group.)

A compound comprises at least one fluorescent moiety covalently bound to at least one second moiety selected from the group consisting of leuco moieties and chromophore moieties.