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1. A photochromic material that is essentially free of polymerizable unsaturated groups, said photochromic material represented by: wherein:B and B′ are each independently:
a metallocenyl group; an aryl group that is mono-substituted with a reactive substituent or a compatibilizing substituent; 9-julolidinyl, an unsubstituted, mono-, di- or tri-substituted aryl group chosen from phenyl and naphthyl, an unsubstituted, mono- or di-substituted heteroaromatic group chosen from pyridyl, furanyl, benzofuran-2-yl, benzofuran-3-yl, thienyl, benzothien-2-yl, benzothien-3-yl, dibenzofuranyl, dibenzothienyl, carbazoyl, benzopyridyl, indolinyl or fluorenyl, wherein the aryl and heteroaromatic substituents are each independently: hydroxy, aryl, mono- or di-(C1-C12)alkoxyaryl, mono- or di-(C1-C12)alkylaryl, C3-C7 cycloalkylaryl, C3-C7 cycloalkyl, C3-C7 cycloalkyloxy, C3-C7 cycloalkyloxy(C1-C12)alkyl, C3-C7 cycloalkyloxy(C1-C12)alkoxy, aryl(C1-C12)alkyl, aryl(C1-C12)alkoxy, aryloxy, aryloxy(C1-C12)alkyl, aryloxy(C1-C12)alkoxy, mono- or di-(C1-C12)alkylaryl(C1-C12)alkyl, mono- or di-(C1-C12)alkoxyaryl(C1-C12)alkyl, mono- or di-(C1-C12)alkylaryl(C1-C12)alkoxy, mono- or di-(C1-C12)alkoxyaryl(C1-C12)alkoxy, amino, mono- or di-(C1-C12)alkylamino, diarylamino, piperazino, N—(C1-C12)alkylpiperazino, N-arylpiperazino, aziridino, indolino, piperidino, morpholino, thiomorpholino, tetrahydroquinolino, tetrahydroisoquinolino, pyrrolidino, C1-C12 alkyl, C1-C12 haloalkyl, C1-C12 alkoxy, mono(C1-C12)alkoxy(C1-C12)alkyl, halogen or —C(═O)R2, wherein R2 is —OR23, —N(R24)R25, piperidino or morpholino, wherein R23 is allyl, C1-C6 alkyl, phenyl, mono(C1-C12)alkyl substituted phenyl, mono(C1-C6)alkoxy substituted phenyl, phenyl(C1-C3)alkyl, mono(C1-C6)alkyl substituted phenyl(C1-C3)alkyl, mono(C1-C3)alkoxy substituted phenyl(C1-C3)alkyl, C1-C3 alkoxy(C3-C4)alkyl or C1-C6 haloalkyl, and R24 and R25 are each independently C1-C3 alkyl, C5-C7 cycloalkyl or a substituted or an unsubstituted phenyl, wherein said phenyl substituents are each independently C1-C3 alkyl or C1-C3 alkoxy; an unsubstituted or mono-substituted group chosen from pyrazolyl, imidazolyl, pyrazolinyl, imidazolinyl, pyrrolidino, phenothiazinyl, phenoxazinyl, phenazinyl and acridinyl, said wherein said substituents are each independently C1-C12 alkyl, C1-C12 alkoxy, phenyl or halogen; a 4-substituted phenyl, the substituent being a dicarboxylic acid residue, a diamine residue, an amino alcohol residue, a polyol residue, —(CH2)—, —(CH2)e— or —[O—(CH2)e]f—, wherein e is an integer ranging from 2 to 6 and f is an integer ranging from 1 to 50, and wherein the substituent is connected to an aryl group of another photochromic material; a group represented by: wherein P is —CH2— or —O—; Q′″ is —O— or substituted nitrogen, the substituted nitrogen substituents being hydrogen, C1-C12 alkyl or C1-C12 acyl, provided that when Q′″ is substituted nitrogen, P is —CH2—; each R2 is independently C1-C12 alkyl, C1-C12 alkoxy, hydroxy or halogen; R27 and R28 are each independently hydrogen or C1-C12 alkyl; and j is an integer ranging from 0 to 2; or B and B′ taken together form a fluoren-9-ylidene or mono- or di-substituted fluoren-9-ylidene, wherein said fluoren-9-ylidene substituents are each independently C1-C12 alkyl, C1-C12 alkoxy or halogen; R5, R8, R9 and R12 are each independently: hydrogen, C1-C6 alkyl, chloro, fluoro, bromo, C3-C7 cycloalkyl or a unsubstituted, mono- or di-substituted phenyl, wherein said phenyl substituents are each independently C1-C6 alkyl or C1-C6 alkoxy; —OR40 or —OC(═O)R40, wherein R40 is hydrogen, amine, alkylene glycol, polyalkylene glycol, C1-C6 alkyl, phenyl(C1-C3)alkyl, mono(C1-C3)alkyl substituted phenyl(C1-C3)alkyl, mono(C1-C6)alkoxy substituted phenyl(C1-C3)alkyl, (C1-C6)alkoxy(C2-C4)alkyl, C3-C7 cycloalkyl, mono(C1-C4)alkyl substituted C3-C7 cycloalkyl or an unsubstituted, mono- or di-substituted phenyl, wherein said phenyl substituents are each independently C1-C6 alkyl or C1-C6 alkoxy; a reactive substituent or a compatibilizing substituent; a 4-substituted phenyl, the substituent being a dicarboxylic acid residue, a diamine residue, an amino alcohol residue, a polyol residue, —(CH2)—, —(CH2)e— or —[O—(CH2)e]f—, wherein e is an integer ranging from 2 to 6, and f is an integer ranging from 1 to 50, and wherein the substituent is connected to an aryl group of another photochromic material; —N(R41)R42, wherein R41 and R42 are each independently hydrogen, C1-C8 alkyl, phenyl, naphthyl, furanyl, benzofuran-2-yl, benzofuran-3-yl, thienyl, benzothien-2-yl, benzothien-3-yl, dibenzofuranyl, dibenzothienyl, benzopyridyl, fluorenyl, C1-C8 alkylaryl, C3-C8 cycloalkyl, C4-C16 bicycloalkyl, C5-C20 tricycloalkyl or C1-C20 alkoxy(C1-C6)alkyl, or R41 and R42 come together with the nitrogen atom to form a C3-C20 hetero-bicycloalkyl ring or a C4-C20 hetero-tricycloalkyl ring; a nitrogen containing ring represented by: wherein each —V— is independently chosen for each occurrence from —CH2—, —CH(R43)—, —C(R43)2—, —CH(aryl)-, —C(aryl)2- and —C(R43)(aryl)-, wherein each R43 is independently C1-C6 alkyl and each aryl is independently phenyl or naphthyl; —W— is —V—, —O—, —S—, —S(O)—, —SO2—, —NH—, —N(R43)— or —N(aryl)-; s is an integer ranging from 1 to 3; and r is an integer ranging from 0 to 3, provided that if r is 0, then —W— is the same as —V; or a group represented by: wherein each R44 is independently C1-C3 alkyl, C1-C6 alkoxy, fluoro or chloro; R45, R46 and R47 are each independently hydrogen, C1-C3 alkyl, phenyl or naphthyl, or R45 and R46 together form a ring of 5 to 8 carbon atoms, and p is an integer ranging from 0 to 3;R6 and R7 are each independently a moderate to strong electron-donating group selected from:
(i) the group —OR8′, wherein R8′ is phenyl(C1-C3)alkyl, C1-C3 alkyl, mono(C1-C6)alkyl substituted phenyl(C1-C3)alkyl, mono(C1-C6)alkoxy substituted phenyl(C1-C3)alkyl, C1-C3 alkoxy(C2-C4)alkyl, C3-C7 cycloalkyl, mono(C1-C4)alkyl substituted C3-C7 cycloalkyl, C1-C6 chloroalkyl, C1-C6 fluoroalkyl, allyl, or R8′ is the group, —CH(R9′)Q″, wherein R9′ is hydrogen or C1-C3 alkyl and Q″ is —CN, —COOH, —COOCH3, or —COOCH2CH3; (ii) —N(R15)R16, wherein R15 and R16 each independently comprises hydrogen, C1-C8 alkyl, phenyl, naphthyl, the heteroaromatic groups furanyl, benzofuran-2-yl, benzofuran-3-yl, thienyl, benzothien-2-yl, benzothien-3-yl, dibenzofuranyl, dibenzothienyl, benzopyridyl and fluorenyl, C1-C8 alkylaryl, C3-C20 cycloalkyl, C4-C20 bicycloalkyl, C5-C20 tricydoalkyl and C1-C20 alkoxyalkyl, wherein said aryl group is phenyl or naphthyl; (iii) a nitrogen containing ring represented by the following graphic formula: wherein Y is selected from the group consisting of —CH2-, —CH(R17)-, —C(R17)(R17)-, —CH(aryl)-, —C(aryl)2-, and —C(R17)(aryl)-, and X is selected from the group consisting of —Y—, —O—, —S—, —S(O)—, —S(O2)-, —NH—, —NR17- and —N-aryl, wherein R17 is C1-C6 alkyl, said aryl substituent is phenyl or naphthyl, m is the integer 1, 2 or 3, and p is the integer 0, 1, 2, or 3, provided that when p is 0, X is Y; or (iv) a group represented by one of the following graphic formulae: wherein R19, R20 and R21 are each hydrogen, C1-C5 alkyl, phenyl or naphthyl, or the groups R19 and R20 may come together to form a ring of 5 to 8 carbon atoms; and R18 is C1-C3 alkyl, C1-C6 alkoxy, fluoro or chloro; R10 is any of the groups discussed above with respect to R5, R8, R9 and R12 or a metallocenyl group; R11 is an is an α-haloalkyl, α,α-dihaloalkyl, trihalomethyl group, a perhalo(C2-C10)alkyl group, a perhaloalkoxy group, or the group —O—C(O)—R, wherein R is a linear or branched group chosen from C1-C10 alkyl, C1-C10 haloalkyl, or C1-C10 perhaloalkyl; R13 and R14 do not form a spirocyclic group and are each independently a (C1-C6)alkyl group, a (C1-C6)alkoxy group, a hydroxy(C1-C6)alkyl or the polyalkoxylated group T represented by the formula:
—Z[(OC2H4)x(OC3H6)y(OC4H8)z]Z′ or—[(OC2H4)x(OC3H6)y(OC4H8)z]Z′ wherein —Z is —C(O)— or —CH2— and Z is hydroxy, epoxy or C1-C3 alkoxy and letters x, y and z are each a number between 0 and 50 and the sum of x, y and z is between 2 and 50.
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