Patent ID: 8444953

Claim:
A compound of the formula wherein: Y 1 , Y 2 , Y 3 , and Y 4 are independently on one or more positions of the phenyl rings, and are independently hydrogen, hydrocarbyl, non-aromatic carbocyclic, non-aromatic heterocyclic, aryl, alkylaryl, arylalkyl, halogen, alkylhalogen; or a hydrocarbyl, non-aromatic carbocyclic, non-aromatic heterocyclic, aryl, alkylaryl, or arylalkyl group substituted with 1 to 4 hydrophilic groups selected from hydroxy, alkoxy, —C(O)OR 5 , —SOR 6 , —SO 2 R 6 , nitro, amido, ureido, carbamato, —SR 7 , —NR 8 R 9 , or poly-alkyleneoxide; or a substituent represented by formula (2) —X 1 —(CR 1 R 2 ) r —Z (2); and provided that at least one of Y 1 , Y 2 , Y 3 , and Y 4 is the substituent represented by formula (2); wherein Z is represented by the formula wherein: X 1 and X 2 are independently oxygen or sulfur; R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , and R 9 are independently selected from hydrogen and C 1 to C 4 hydrocarbyl; r and s are independently 0 or an integer from 1 to 20; a, b, c, d, and e independently represent an integer from 1 to 5; and D is selected from the carboranes —C 2 HB 9 H 10 or —C 2 HB 10 H 10 , wherein —C 2 HB 9 H 10 is nido ortho-, meta-, or para-carborane, and —C 2 HB 10 H 10 is closo ortho-, meta-, or para-carborane and provided also that at least one of Y 1 , Y 2 , Y 3 , and Y 4 is halogen or alkylhalogen; and M is either two hydrogen ions, a single monovalent metal ion, two monovalent metal ions, a divalent metal ion, a trivalent metal ion, a tetravalent metal ion, a pentavalent metal ion, a hexavalent metal ion, wherein the porphyrin-metal complex derived from a single monovalent metal ion is charge-balanced by a counter cation, and the porphyrin-metal complex derived from a trivalent, tetravalent, pentavalent, hexavalent metal ion is charge-balanced by an appropriate number of counter anions, dianions, or trianions.