Patent ID: 6495692
Filing Date: 2002-12-17
Classification: C09B,G01N,Y10S,Y10T

Abstract:
A compound having the structure: wherein:R1, R2, R3, R4 independently represent a member selected from the group consisting of hydrogen, halogen, aryl having no more than one ring; R5 represents an alkyl group having 1 to 6 carbon atoms or an aryl group having no more than one ring; R6, R7, R8, R9 independently represent a member selected from the group consisting of hydrogen, halogen, alkyl having 1 to 6 carbon atoms, aryl having no more than one ring, provided that at least one of R6, R7, R8, R9 represents a halogen; R10 represents an alkyl group having 1 to 6 carbon atoms or an aryl group having no more than one ring; R11, R12 independently represent a member selected from the group consisting of hydrogen, halogen, alkyl having 1 to 6 carbon atoms, aryl having no more than one ring, R13 represents hydrogen or an alkyl group having 1 to 6 carbon atoms; Y represents S, O, C, or Se, n represents 1; and Xâˆ’ represents a counter ion.