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Gd2O3,Zn(CH3COO)2·2H2O和吡啶-2,5-二羧酸(H2pydc)的水热反应导致一个新颖的钆-锌配位聚合物犤La2Zn2(pydc)5(H2O)2犦n(1)。化合物1的晶体属单斜晶系,空间群P21/c,a=9.5869(1),b=20.4862(3),c=10.1105(2)?,β=97.4890(10)°,V=1968.76(5)?3,Z=4。在同样的条件下,Er2O3或Tb4O7,Zn(CH3COO)2·2H2O和H2pydc的水热反应产生了与化合物1结构不同的配位聚合物犤Ln2Zn(pydc)4(H2O)8·H2O犦n(Ln=Er(2);Ln=Tb(3))。化合物2和3异质同晶,空间群P1珔。对2:a=7.8708(7),b=9.2665(8),c=13.0232(11)?,α=75.295(1),β=75.000(2),γ=79.109(2)°,V=879.67(13)?3,Z=1;对3:a=7.9105(5),b=9.3453(6),c=13.0005(9)?,α=75.3380(10),β=75.0460(10),γ=79.0050(10)°,V=890.17(10)?3,Z=1。X-射线单晶结构研究表明化合物1是一个三维网状结构,而化合物2和3为管状结构。热重分析研究表明所有化合物在380℃以下稳定。
The hydrothermal reaction of Gd2O3, Zn (CH3COO) 2.2H2O and pyridine-2,5-dicarboxylic acid (H2pydc) led to a novel gadolinium-zinc coordination polymer, La2Zn2 (pydc) 5 1). The crystal of compound 1 belongs to the monoclinic system. The space group P21 / c has a = 9.5869 (1), b = 20.4862 (3), c = 10.1105 (2), β = 97.4890 (10) ° and V = 1968.76 5)? 3, Z = 4. Under the same conditions, the hydrothermal reaction of Er2O3 or Tb4O7, Zn (CH3COO) 2 · 2H2O and H2pydc yielded a coordination polymer with a different structure from that of compound 1, such as Ln2Zn (pydc) 4 (H2O) 8 · H2O 犦 n Ln = Er (2); Ln = Tb (3)). Heterogeneous isomorphisms of compounds 2 and 3, space group P1 珔. A = 75.295 (1), β = 75.000 (2), γ = 79.109 (2) °, V = 879.67 (2) a = 7.8708 (7) b = 9.2665 (13)? 3, Z = 1; for 3: a = 7.9105 (5), b = 9.3453 (6), c = 13.0005 (9) ?,? = 75.3380 (10),? = 75.0460 = 79.0050 (10) °, V = 890.17 (10)? 3, Z = 1. X-ray crystal structure studies show that compound 1 is a three-dimensional network structure, while compounds 2 and 3 are tubular structures. Thermogravimetric analysis showed that all the compounds were stable below 380 ℃.