Chelating and detoxification metal ions are also the focus of many researchers . according to lewis soft - hard acid - base theory , aluminum is the hardest trivancy lewis acid , and polyphenols are lewis base theoretically , they can combine together tightly 根據(jù)lewis軟硬酸堿理論,鋁是三價(jià)金屬離子中最硬的lewis酸,而多酚類卻是lewis堿(電子對(duì)供體,親核體) ,兩者可以很好的結(jié)合。