Preparation of "Janus"-type Nanosheets

k_4 nb_6o_ <17> / 3h_2 oion -exchanged with (c_< 18> h_< 37>)_2N(ch_3)_2+ ions were reacted withphenylphosphonic acid to prepare a -type derivative possessing modified an interlayer I. Then，c_< 12> h_< 25> nh_3 + ions were introduced into an unmodified interlayer II and a resulting intermediatewas further treated with carboxyalkylphosphonic acids (COOHCnP；n=1-3). The nanosheets in The products were likely to possess two interlayer surfaces modified不同organophosphonate moieties。

K_4Nb_6O_<17>・3H_2O ion-exchanged with (C_<18>H_<37>)_2N(CH_3)_2+ ions were reacted with phenylphosphonic acid to prepare a A-type derivative possessing modified an interlayer I. Then, C_<12>H_<25>NH_3+ ions were introduced into an unmodified interlayer II and a resulting intermediate was further treated with carboxyalkylphosphonic acids (COOHCnP;n=1-3). The nanosheets in the products were likely to possess two interlayer surfaces modified with different organophosphonate moieties.