Abstract: The invention relates to a group of novel electrochromic compounds. More specifically, it relates to benzazoles and condensed azole compounds substituted with one or several pyridinium rings and the use of these compounds as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.

Abstract: The photochromic compound is represented by the following general formula (1): wherein, X denotes an oxygen atom or a nitrogen atom unsubstituted or substituted by a substituent selected from the following Y1 group: Y1 group: —R1, -A1(B1)l(A2)m(B2)nR2, -A3A4, -A5R3 R1 denotes a cyano group or the like, R2 denotes an alkyl group or the like, R3 denotes a halogen atom or the like, A1, A2, A3, and A5 each independently denote an alkylene group or the like, A4 denotes a naphthyl group which may be substituted, B1 and B2 each independently denote any one of the divalent groups selected from the following group: l, m, and n are each independently 0 or 1, provided that n is 0 if m is 0, Y2 denotes a hydrogen atom or the like, R denotes a hydrogen atom or the like, denotes a norbornylidene group or the like.

Abstract: The photochromic compound is represented by general formula (1): wherein, X denotes an oxygen atom, or a nitrogen atom unsubstituted or substituted by a substituent selected from Y1 group: —R1, -A1(B1)l(A2)m(B2)nR2, -A3A4, -A5R3 R1 denotes a cyano group or the like, R2 denotes an alkyl group or the like, R3 denotes a halogen atom or the like, A1, A2, A3, and A5 each independently denote an alkylene group or the like, A4 denotes a naphthyl group which may be substituted, B1 and B2 each independently denote a divalent group selected from the following group: l, m, and n are each independently 0 or 1, provided that n is 0 when m is 0, Y2 denotes a hydrogen atom or the like, R denotes a hydrogen atom or the like, and denotes a norbornylidene group, a bicyclo[3.3.1]nonylidene group, or an adamantylidene group which may each be substituted.

Abstract: The photochromic compound is represented by the following general formula (1): wherein, X denotes an oxygen atom or a nitrogen atom unsubstituted or substituted by a substituent selected from the following Y1 group: Y1 group: —R1, -A1(B1)l(A2)m(B2)nR2, -A3A4, -A5R3 R1 denotes a cyano group or the like, R2 denotes an alkyl group or the like, Ra denotes a halogen atom or the like, A1, A2, A3, and A5 each independently denote an alkylene group or the like, A4 denotes a naphthyl group which may be substituted, B1 and B2 each independently denote any one of the divalent groups selected from the following group: l, m, and n are each independently 0 or 1, provided that n is 0 if m is 0, Y2 denotes a hydrogen atom or the like, R denotes a hydrogen atom or the like, denotes a norbornylidene group or the like.

Abstract: The present invention relates to a group of novel electrochromic compounds. More specifically, it relates to electrochromic compounds comprising one or several pyridinium rings and the use of these compounds as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.

Abstract: Electrochromic compounds and optical articles containing them The present invention relates to a group of novel electrochromic compounds. More specifically, it relates to electrochromic compounds comprising one or several pyridinium rings and the use of these compounds as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.

Abstract: The present invention relates to a group of novel electrochromic compounds. More specifically, it relates to electrochromic compounds comprising one or several pyridinium rings and the use of these compounds as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.

Abstract: The present invention relates to a group of novel electrochromic materials. More specifically, it relates to electrochromic materials having two-core viologens and the use of these two-core viologens as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.

Abstract: Electrochromic compounds and optical articles containing them The present invention relates to a group of novel electrochromic compounds. More specifically, it relates to electrochromic compounds comprising one or several pyridinium rings and the use of these compounds as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.

Abstract: The present invention relates to a group of novel electrochromic materials. More specifically, it relates to electrochromic materials based on either single or two-core viologen systems and the use of these viologen systems as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.

Abstract: The present invention relates to a group of novel electrochromic materials. More specifically, it relates to electrochromic materials based on either single or two-core viologen systems and the use of these viologen systems as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.

Abstract: The present invention relates to a group of novel electrochromic materials. More specifically, it relates to electrochromic materials having two-core viologens and the use of these two-core viologens as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.

Abstract: A naphthopyran compound represented by the formula (I): wherein: n1, n2, p, q is an integer comprised from 0 to 5 inclusive; m is an integer comprised from 0 to 4 inclusive; R1 and R2 represent a group selected from halogen, —Ra, —OH, —ORa, —SH, —SRa, —NH2, —NRaRa1, —NRbRc, —CO—Ra, and —CO2Ra1, wherein Ra, Ra1, Rb and Rc, are as defined in the description; R3 represents a group selected from halogen, —Ra, —OH, —ORa, —SH, —SRa, —NH2, and —NRaRa1; R4 represents a group selected from halogen, —Ra, —OH, —ORa, —SH, —SRa, —NH2, —NRaRa1, —CO—Ra, and —CO2Ra1; R5 represents a group selected from: halogen, —Ra, —OH, —ORa, —SH, —SRa, —NH2, and —NRaRa1, wherein Ra and Ra1 are as defined hereinbefore, or when q is equal to 2, then two R5 together represent further a group —O—(CH2)q1—O— wherein q1 represents an integer comprised from 1 to 3 inclusive.

Abstract: A naphthopyran compound represented by the formulae (I) to (II) wherein: —mi, Hi2, p, q are each an integer comprised from O to 4 or 5 inclusive; —Ri, R2 and R4, represent a group selected from halogen, H, —Ra, aryl, —OH, —ORa, —SH, —SRa, —NH2, —NR8RaI, —NRbRc, —NRal-CORa, —NRaiCO(aryl), —NRai aryl, —N-aryfe, —N(aryl)CO(aryl), —CO—R3, —CO2R3I, —OC(O)—Rd, and —X—(Re)—Y, and linear or branched (Ci-Ci8) perfluoroalkyl group, wherein R3, Rai, Rb, Rc, X, Y, Re, Rd are as defined into the description; —Zi re resent a group selected from: (formules).

Abstract: A naphthopyran compound represented by the formula (I) wherein: n1, n2, p, m and q represent an integer; R1, R2 and R4, represent a group selected from halogen, —Ra, —OH, —ORa, —SH, —SRa, —NH2, —NRaRa1, —NRbRc, —CO—Ra, —CO2Ra1, —OC(O)—Rd, —X—(Re)—Y, linear or branched (C1-C18) perfluoroalkyl group, wherein Ra, Ra1, Rb, Rc, X, Y, Re, and Rd are as defined in the description; Z represents a group selected from CO, CS, SO, SO2, CO2, C(O)S, CS2, C(O)NH, C(O)NRa, C(S)NH, C(S)NRa and C?NRa; R3 represents a group selected from halogen, —Ra, linear or branched (C1-18) perfluoroalkyl group —OH, —ORa, —SH, —SRa, —NH2, and —NRaRa1; R6 represents a group selected from —Ra which may be optionally substituted, linear or branched (C1-18) perfluoroalkyl, cycloalkyl, heterocycloalkyl, aryl, and heteroaryl, which may be optionally substituted; R5 represents a group selected from: halogen, —Ra, linear or branched (C1-18) perfluoroalkyl group, —OH, —ORa, —SH, —SRa, —NH2, —NRaRa1, —CO—Ra, —O—C(O)—Ra and —CO2Ra1; or when q is equa

Abstract: A naphthopyran compound represented by the formulae (I) to (II) wherein:—mi, Hi2, p, q are each an integer comprised from O to 4 or 5 inclusive;—Ri, R2 and R4, represent a group selected from halogen, H, —Ra, aryl, —OH, —ORa, —SH, —SRa, —NH2, —NR8RaI, —NRbRc, —NRaI-CORa, —NRaiCO(aryl), —NRai aryl, —N-aryfe, —N(aryl)CO(aryl), —CO—R3, —CO2R3I, —OC(O)—Rd, and —X—(Re)—Y, and linear or branched (Ci-Ci8) perfluoroalkyl group, wherein R3, RaI, Rb, Rc, X, Y, Re, Rd are as defined into the description;—Zi re resent a group selected from: (formules)

Abstract: A naphthopyran compound represented by the formula (I): wherein: n1, n2, p, q is an integer comprised from 0 to 5 inclusive; m is an integer comprised from 0 to 4 inclusive; R1 and R2 represent a group selected from halogen, —Ra, —OH, —ORa, —SH, —SRa, —NH2, —NRaRa1, —NRbRc, —CO—Ra, and —CO2Ra1, wherein Ra, Ra1, Rb and Rc, are as defined in the description; R3 represents a group selected from halogen, —Ra, —OH, —ORa, —SH, —SRa, —NH2, and —NRaRa1; R4 represents a group selected from halogen, —Ra, —OH, —ORa, —SH, —SRa, —NH2, —NRaRa1, —CO—Ra, and —CO2Ra1; R5 represents a group selected from: halogen, —Ra, —OH, —ORa, —SH, —SRa, —NH2, and —NRaRa1, wherein Ra and Ra1 are as defined hereinbefore, or when q is equal to 2, then two R5 together represent further a group —O—(CH2)q1—O— wherein q1 represents an integer comprised from 1 to 3 inclusive.

Abstract: A naphthopyran compound represented by the formula (I) wherein: n1, n2, p, m and q represent an integer; R1, R2 and R4, represent a group selected from halogen, —Ra, —OH, —ORa, —SH, —SRa, —NH2, —NRaRa1, —NRbRc, —CO—Ra, —CO2Ra1, —OC(O)—Rd, —X—(Re)—Y, linear or branched (C1-C18) perfluoroalkyl group, wherein Ra, Ra1, Rb, Rc, X, Y, Re, and Rd are as defined in the description; Z represents a group selected from CO, CS, SO, SO2, CO2, C(O)S, CS2, C(O)NH, C(O)NRa, C(S)NH, C(S)NRa and C?NRa; R3 represents a group selected from halogen, —Ra, linear or branched (C1-18) perfluoroalkyl group —OH, —ORa, —SH, —SRa, —NH2, and —NRaRa1; R6 represents a group selected from —Ra which may be optionally substituted, linear or branched (C1-18) perfluoroalkyl, cycloalkyl, heterocycloalkyl, aryl, and heteroaryl, which may be optionally substituted; R5 represents a group selected from: halogen, —Ra, linear or branched (C1-18) perfluoroalkyl group, —OH, —ORa, —SH, —SRa, —NH2, —NRaRa1, —CO—Ra, —O—C(O)—Ra and —CO2Ra1; or when q is equa

Abstract: A photochromic grey coloring 2H-naphtho[1,2-b]pyran of formula (1) wherein R1 is selected from mono-, di- or poly-substituted aryl groups, mono-, di- or poly-substituted naphthyl groups and mono-, di- or poly-substituted heteroaryl groups, wherein at least one substituent is a nitrogen containing group, including amino, C1-C20 and C6-C20 alkylamino, C1-C20 and C6-C20 dialkylamino, C2-C20 dialkenylamino, C2-C20 or C4-C20 di(polyalkenyl)amino, arylamino, diarylamino, C1-C20 alkylarylamino, tetra (C1-C10 linear or branched alkyl) guanidino and cyclic-amino groups and at least one of R7 and R9, which may be the same or different, is selected from C1-C20 N alkylamino C1-C20 N-alkylamido, C1-C20 N,N-dialkylamido, amido, nitro, amino, C1-C20 alkylamino, C1-C20 dialkylamino, C2-C20 dialkenylamino, C4-C20 di(polyalkenyl)amino, arylamino, diarylamino, C1-C20 alkylarylamino, or cyclicamino groups.

Abstract: A photochromic compound has the formula (I) wherein R1 is selected from the group including substituted amino aryl moieties, substituted cyclic amino aryl moieties and substituted N-indolinoaryl or N-tetrahydroquinolino aryl groups, R3 is selected from the group including linear or branched C1-C20 alkyl, linear or branched C2-C20 alkenyl or polyalkenyl, C2-C20 alkynyl or polyalkynyl, aryl, heteroaryl, linear or branched C1-C20 alkyl aryl, linear or branched C1-C20 alkyl-cycloalkyl or -bicycloalkyl or -tricycloalkyl or substituted -cycloalkyl or -bicycloalkyl or -tricycloalkyl, linear or branched C1-C20 haloalkyl or perhaloalkyl, linear or branched C1-C20 alkoxyalkyl or peralkoxyalkyl, linear or branched C1-C20 alkylthioalkyl or peralkylthioalkyl, linear or branched C1-C20 amino alkyl or peraminoalkyl, C3-C20 cycloalkyl or substituted cycloalkyl, C4-C20 bicycloalkyl or substituted bicycloalkyl, C6-C20 tricycloalkyl or substituted tricycloalkl or linear or branched C1-C20 hydroxyalkyl or perhydroxyalkyl; R4 and