Two Three‐Dimensional Actinide–Silver Heterometallic Coordination Polymers Based on 2,2′‐Bipyridine‐3,3′‐dicarboxylic Acid with Helical Chains Containing Dimeric or Trimeric Motifs

Abstract

Under hydrothermal conditions, two new 3D actinide–silver (An–Ag) heterometallic coordination polymers, namely, [Ag(UO2)2(µ2‐OH)(bpdc)2(H2O)2]n (1) and [Ag3Th6(µ3‐O)(µ3‐OH)(µ2‐OH)6(bpdc)6(NO3)6·H2O]n (2, H2bpdc = 2,2′‐bipyridine‐3,3′‐dicarboxylic acid), were assembled through a hard–soft recognition strategy. Compounds 1 and 2 were characterized by single‐crystal X‐ray diffraction, powder X‐ray diffraction, and infrared spectroscopy. Both compounds are constructed through the bridging of infinite polynuclear An–bpdc chiral helical chains by AgI cations. Compound 2 represents the first ThIV–AgI heterometallic coordination polymer. Furthermore, the thermal stability and luminescence properties of 1 were studied.