Two-dimensional Lanthanide Coordination Polymers Constructed from Ce3＋/pr3＋ Cation, Imidazole-4,5- dicarboxylate and in situ Generated Oxalate Anions

Two new lanthanide coordination polymers [Ln(C 5 H 2 N 2 O 4)(H 2 O) 2 (C 2 O 4) 0.5 ] n nH 2 O (Ln=Ce III (1) or Pr III (2);C 5 H 2 N 2 O 4=imidazole-4,5-dicarboxylate anion;C 2 O 4=oxalate anion) have been synthesized and structurally characterized by single-crystal X-ray diffraction,elemental analyses and IR spectrum.Both compounds crystallize in monoclinic,space group P2 1 /c with a=7.5225(3),b=17.2416(6),c=8.6089(3),β=110.9610(10)°,V=1042.68(7)3,Z=4,C 6 H 8 N 2 O 9 Ce,M r=392.26,D c=2.499 g/cm 3,μ(MoKα)=4.414 mm 1,F(000)=752,the final R=0.0167 and wR=0.0412 for 1;a=7.4973(3),b=17.2113(8),c=8.5729(4),β=110.9440(10)°,V=1033.14(8)3,Z=4,C 6 H 8 N 2 O 9 Pr,M r=393.05,D c=2.527 g/cm 3,μ(MoKα)=4.764 mm 1,F(000)=756,the final R=0.0192 and wR=0.0455 for 2.X-ray diffraction analyses reveal that the lanthanide cations in compound 1 or 2 are linked by imidazole-4,5-dicarboxylate and in situ generated oxalate anions via Ln-O and Ln-N covalent bonds to form two-dimensional layered networks.The successful synthesis of compound 1 or 2 also indicates a crystallographic confirmation for the decomposition of curcumin to form oxalate anion under solvothermal conditions.

Two-dimensional Lanthanide Coordination Polymers Constructed from Ce~3+/Pr~3+ Cation,Imidazole-4,5-dicarboxylate and in situ Generated Oxalate Anions

Two new lanthanide coordination polymers [Ln(C<,5>H<,2>N<,2>O<,4>)(H<,2>O)<,2>(C<,2>O<,4>)0.5]<,n>.nH<,2>O(Ln = Ce<'Ⅲ> (1) or Pr<,'Ⅲ> (2); C<,5>H<,2>N<,2>O<,4>=imidazole-4,5-dicarboxylate anion; C<,2>O<,4>=oxalate anion)have been synthesized and structurally characterized by single-crystal Ⅹ-ray diffraction, elemental analyses and IR spectrum. Both compounds crystallize in monoclinic, space group P2<,1>/c with a =7.5225(3), b = 17.2416(6), c = 8.6089(3) A,β=110.9610(10)°,V = 1042.68(7) A<'3>, Z = 4,C<,6>H<,8>N<,2>O<,9>C<,e>,Mr=392.26,Dc= 2.499g/cm<'3>,μ(MoKa) = 4.414 mm<'-1>, F(000) = 752, the final R =0.0167 and wR = 0.0412 for 1; a = 7.4973(3), b = 17.2113(8), c = 8.5729(4) A,β= 110.9440(10)°,V= 1033.14(8) A<'3>,Z = 4, C<,6>H<,8>N<,2>O<,9>Pr, Mr = 393.05, Dc = 2.527 g/cm<'3>,μ(MoKα) = 4.764 mm<-1>,F(000) = 756, the final R = 0.0192 and wR = 0.0455 for 2. Ⅹ-ray diffraction analyses reveal that the lanthanide cations in compound 1 or 2 are linked by imidazole-4,5-dicarboxylate and in situ generated oxalate anions via Ln-O and Ln-N covalent bonds to form two-dimensional layered networks. The successful synthesis of compound 1 or 2 also indicates a crystallographic confirmation for the decomposition of curcumin to form oxalate anion under solvothermal conditions.