Porphyrins and their use as photosensitizer

摘要

The invention relates to new compounds of the general formula:in which:R1 is C1 to C6 alkyl or aryl,R2 to R5 independently of each other are H, OH, C1 to C6 alkyl, C1 to C6 alkylene or OR6, R6 being C1 to C6 alkyl or aryl,An- is an anion andn is 1 or 2.The compounds can be used as photosensitizers for example in medicine, agriculture and industry.