2.2.2. Syntheses of **2** and **3**

The synthetic procedures of **2** and **3** were the same as **1,** except for the adding of MIPA (5-Methylisophthalic Acid, Scheme 1b) (0.200 g, 1.11 mol) and AA (Adipic Acid, Scheme 1c) ligands (0.200 g, 1.37 mol) for **2** and **3**, with the yield of 36% and 28%, respectively. Based on Na9[A-α-PW9O34]·7H2O. Elemental analysis calcd (%) for **2**: C, 12.34; H, 4.35; and N, 3.00 (based on [Ni(DACH)2][Ni6(OH)3(DACH)3(HMIP)2(H2O)2(PW9O34)]·- 56 H2O). Found: C, 14.10; H, 3.37; N, 3.39. IR(KBr, cm–1): 3458(s), 3338(w), 3264(w), 2929(w), 2859(w), 1562(w), 1361(w), 1033(w), 935(vs), 841(vs), 796(vs), and 715(vs). Elemental analysis calcd (%) for **3**: C, 10.53; H, 2.36; and N, 3.27 (based on [Ni(DACH)2][Ni6(OH)3- (DACH)2(AP)(H2O)5(PW9O34)]·2H2O). Found: C, 10.44; H, 2.63; and N, 3.34. IR(KBr, cm–1): 3423(s), 3240(w), 2923(w), 2860(w), 1591(w), 1546(w), 1413(w), 1037(s), 943(vs), 848(vs), 796(vs), and 710(vs).
