Cytotoxicity of Different Substituted Biphenyls and Their Synergy Toxicity Combined With Single-walled Carbon Nanotubes

The cytotoxicities of biphenyl,2-bromine biphenyl,biphenyl-2-carboxylic acid and 2-amino biphenyl,and the synergy toxicities of the four different substituted biphenyl compounds with single-walled carbon nanotubes(SWNTs) were investigated with MTT.Resultsshow that the cytotoxicities of the four compounds were different and dependent on time and concentrartion.The cytotoxicity in decresing order are 2-aminobiphenyl,2-bromine biphenyl,biphenyl,and biphenyl-2-carboxylic acid.In the synergy toxicity experiments,the cytotoxicity was enhanced for 2-3 times when the biphenyl compounds combined with SWNTs,indicting that biphenyl compounds combined with SWNTs resulted in their synergy toxicity.