The present invention relates to a curable photochromic composition that includes: (a) a photochromic compound; and (b) a segmented polymer that includes active hydrogen groups, at least one first segment, and at least one second segment, in which, (i) each first segment independently includes a (meth)acrylic polymer segment, and (ii) each second segment independently includes at least one of, a polycarbonate segment, a polyester segment, a polyether segment, a polyurethane segment, and combinations of two or more thereof. The curable photochromic composition further includes (c) a curing agent having reactive functional groups that are reactive with the active hydrogen groups of the segmented polymer (a), in which the curing agent includes at least one of, a polyisocyanate, a polyisothiocyanate, and an aminoplast. The present invention also relates to photochromic articles that include at least one layer formed from the curable photochromic composition of the present invention.

The present invention relates to a curable photochromic composition that includes: (a) a photochromic compound; and (b) a segmented polymer that includes active hydrogen groups, at least one first segment, and at least one second segment, in which, (i) each first segment independently includes a (meth)acrylic polymer segment, and (ii) each second segment independently includes at least one of, a polycarbonate segment, a polyester segment, a polyether segment, a polyurethane segment, and combinations of two or more thereof. The curable photochromic composition further includes (c) a curing agent having reactive functional groups that are reactive with the active hydrogen groups of the segmented polymer (a), in which the curing agent includes at least one of, a polyisocyanate, a polyisothiocyanate, and an aminoplast. The present invention also relates to photochromic articles that include at least one layer formed from the curable photochromic composition of the present invention.

An apparatus, a system, sensor, and a method for determining dissolved oxygen content in air and aqueous medium are disclosed herein. The dissolved oxygen content may be determined by irradiating the sensor comprising at least a photo-oxidizable compound by a light irradiation source, wherein the irradiation enables the photo-oxidizable compound to change its luminescent properties based upon photo-oxidation thereby enabling the quantification of the dissolved oxygen content in the medium. The dissolved oxygen content may be captured via the impedance response generated by interdigitated conducting electrode patterns included in the sensor. The dissolved oxygen content registered by the interdigitated conducting electrode patterns may be transmitted to a user device via a short range or long-range communication via an electronic circuit embedded within the sensor.

The present invention relates to an anodically-coloring electrochromic compound represented by the following Formula (I),

##STR00001##

With reference to Formula (I), R.sup.1 and R.sup.2 are each independently selected from linear or branched C.sub.3-C.sub.20 alkyl. The present invention also relates to electrochromic devices and compositions that include an anodically-coloring electrochromic compound represented by Formula (I).

The present invention relates to an anodically-coloring electrochromic compound represented by the following Formula (I),

##STR00001##

With reference to Formula (I), R.sup.1 and R.sup.2 are each independently selected from linear or branched C.sub.3-C.sub.20 alkyl. The present invention also relates to electrochromic devices and compositions that include an anodically-coloring electrochromic compound represented by Formula (I).

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.

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.

An organic compound is represented by general formula (1) below: ##STR00001## where X.sub.1 and X.sub.2 are each independently selected from the group consisting of an alkyl group, an aryl group, and an aralkyl group; R.sub.11 to R.sub.16 are each independently selected from the group consisting of a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, a heterocyclic group, and a halogen atom; R.sub.21 and R.sub.22 are each independently selected from the group consisting of a hydrogen atom, an alkyl group, an aryl group, and an aralkyl group; and A.sub.1.sup.− and A.sub.2.sup.− each independently represent a monovalent anion.

An organic compound is represented by general formula (1) below: ##STR00001## where X.sub.1 and X.sub.2 are each independently selected from the group consisting of an alkyl group, an aryl group, and an aralkyl group; R.sub.11 to R.sub.16 are each independently selected from the group consisting of a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, a heterocyclic group, and a halogen atom; R.sub.21 and R.sub.22 are each independently selected from the group consisting of a hydrogen atom, an alkyl group, an aryl group, and an aralkyl group; and A.sub.1.sup.− and A.sub.2.sup.− each independently represent a monovalent anion.

The present invention relates to an electrochromic compound, and an electrochromic composition and an electrochromic device, including the same. The electrochromic compound according to the present invention may achieve excellent black coloring effects and excellent curing characteristics, and thus may be used advantageously in an electrochromic device.