如表2所示，fi-值最大的分子位点是精氨酸分子受到亲电攻击时向其提供电

As shown in Table 2, the maximum value of molecular FI- site is to provide a charge thereto preferred sites, FI- visible index N3 O11 atoms and very close arginine molecules are electrophilic attack, they show that when subjected to two electrophilic attack centers are equivalent [33]. On the other hand, when subjected to nucleophilic attack, arginine molecule reception sites will charge distribution of fi + large value, C9 is the main reaction site of nucleophilic attack, which largely involved Cu- electron transfer between the BTA and the arginine molecule. Comprehensive analysis, arginine, mainly as a complexing agent and N3 O11 on the carboxyl, Cu atoms C9 and surface contamination BTA effectively remove the strong interaction to break the bond between the Cu-BTA achieve engagement of BTA.

As shown in Table 2, the largest molecular bit of the fi-value is the preferred bit of the charge provided to the arginine molecule when it is subjected to a pro-electric attack, and it can be seen that the fi-index of the N3 and O11 atoms is very close, indicating that the two centers are equivalent when they experience a pro-electric attack. On the other hand, when a pronuclear attack, arginine molecules will assign a large fi-value to the point receiving the charge, so C9 is the main reaction point of pronuclear attack, which is largely involved in the electron transfer between Cu-BTA and argininine molecules. Comprehensive analysis, arginine as a complex agent is mainly based on N3 and the O11, C9 atoms and BTA pollution of the Cu surface strong interaction to break the bond between Cu-BTA to achieve the effective removal of BTA.

As shown in Table 2, the molecular site with the highest fi value is the preferred site to provide charge to arginine molecules when they are subjected to electrophilic attack. It can be seen that the fi index of N3 and O11 atoms are very close, indicating that when they experience electrophilic attack, the two centers are equivalent [33]. On the other hand, when attacked by nucleophilic attack, the arginine molecule will assign a large fi + value to the site receiving the charge, so C9 is the main reaction site of nucleophilic attack, which is largely involved in the electronic transfer between Cu BTA and arginine. Comprehensive analysis shows that as complexing agent, arginine mainly breaks the bond between Cu BTA and realizes the effective removal of BTA by strong interaction between N3, O11 and C9 atoms on carboxyl group and Cu surface polluted by BTA.<br>