English

• 0.   Introduction

  Since the discovery of Single-molecule magnets (SMMs) during the 1990s, the study of SMMs has a booming development for its potential application in high-density information storage and quantum comput-ing devices^[1-4]. To achieve these applications, carefully designed structures of SMMs are required. Among all the central ions, owning to their significant magnetic anisotropy which arising from the large, unquenched orbital angular momentum, lanthanide-ions are widely used to construct SMMs^[5-15]. For example, Zheng's group reported a monometallic Dy complex of magnetization reached an effective energy barrier to magnetic relaxa-tion of U_eff=1 815(1) K^[16]. Tong's group reported another Dy-based compound with a record anisotropy barrier up to 1 837 K in zero field and a record magnetic blocking temperature of 60 K^[17]. Notably, previous studies show that the magnetic interaction between centre metals and the alteration of coordination geometry on them are two important factors to adjust the relaxation dynamics of lanthanide-based SMMs^[18-19]. For example, Tang's group reported an asymmetric dinuclear Dy(Ⅲ) complex which shows the high axiality and Ising exchange interaction that can efficiently suppress quantum tunneling of magnetization and the exchange interaction between the Dy sites contribution leading to an increase of the relaxation time by 3 orders of magnitude^[20]. In addition, the dinuclear SMMs are ideal configurations to study the single-ion effective anisotropic barriers versus the energy barriers which arising from the two interaction metal centers^[21-22]. To date, various researches have been performed to study how the exchange coupling affects magnetic properties of lanthanide-based complexes and some innovative results have been reported^[23-25].

  To construct dinuclear SMMs, the choice of ligands is very important. As ligands can influence the construction of coordination polymers and moreover, ligand field is a key factor to control the magnetic anisotropy of SMMs. Therefore, Schiff-base ligands with rich O, N-based multichelating sites have been regarded as excellent candidates to construct lanthanide-based multinuclear coordination com-pounds. In addition, by modifying the terminal group of acylhydrazine derivatives, various ligand systems will be built in which ligand field will also affect the SMM properties of Ln(Ⅲ) coordination compounds^[26-28].

  Herein, we choose 2-hydroxy-3-methoxy-5-bromo-benzaldehyde oxime(HL) as ligand in combination with methane acid and acetic acid to build new Ln-based coordination polymers. Two new complexes, namely, [Gd₂(L)₄(HCOO)₂(CH₃OH)₂] (1) and [Dy₂(L)₄(CH₃COO)₂(CH₃OH)₂] (2) have been constructed succe-ssfully. Their syntheses, crystal structures and magnetic properties are reported.

  图 Scheme 1

  

  图 Scheme 1  Molecular structure of HL

  Figure Scheme 1.  Molecular structure of HL

  下载: 全尺寸图片 幻灯片

  1.   Experimental

  1.1   Materials and measurements

  All reagents and solvents were purchased from Aladdin and used without further purification. The ligand HL was synthesized according to the literature^[29]. Elemental analyses for C, H and N were performed on a Perkin-Elmer elemental analyzer model 240. IR spectra were recorded on a Nicolet IS10. IR spectro-meter using KBr pellets in the range of 4 000~500 cm^-1. Variable temperature magnetic susceptibilities were measured on SQUID MPMSXL-7 magnetometer in the temperature range of 2~300 K.

  1.2   Synthesis of complex 1

  Ligand HL (0.1 mmol) was dissolved in mixed solvent of 10 mL CH₃OH and 5 mL CH₃CN followed by addition of GdCl₃·6H₂O (0.1 mmol) and sodium methoxide (0.2 mmol), which gave a clear solution after stirring for 2.5 h. Diethyl ether was diffused slowly into the solution at room temperature, and light-yellow single crystals were obtained in 5 days. Yield: 42.5% based on rare-earth. Elemental analysis calculated for C₄₀H₅₄Br₄Gd₂N₄O₂₂(%): C 30.47; H 3.45; N 3.55. Found(%): C 30.61; H 3.52; N 3.61. FT-IR (KBr, cm^-1): 1 689(w), 1 612(m), 1 568(m), 1 473(s), 1 312(w), 1 174(w), 1 072(m), 1 010(w), 952(w), 842(s), 753(m), 587(m).

  1.3   Synthesis of complex 2

  Ligand HL (0.1 mmol) was dissolved in mixed solvent of 10 mL CH₃OH and 5 mL CH₃CN followed by the addition of Dy(CH₃COO)₃·4H₂O (0.1 mmol) and triethylamine (0.2 mmol). A clear solution was obtained after stirring for 3 h. Diethyl ether was used to diffuse slowly into this solution at room temperature, and light-yellow single crystals were obtained in 5 days. Yield: 44.5% based on rare-earth. Elemental analysis calculated for C₄₀H₅₀Br₄Dy₂N₄O₂0(%): C 30.97; H 3.25; N 3.61. Found(%): C 30.81; H 3.21; N 3.51. FTIR (KBr, cm^-1): 1 860(w), 1 601(m), 1 478(m), 1 380(s), 1 221(m), 1 110(s), 1 005(w), 941(w), 840(m), 734(s), 558(w).

  1.4   X-ray crystallographic study

  The suitable single crystals of complexes 1 and 2, with crystal size of 0.34 mm×0.34 mm×0.29 mm and 0.32 mm×0.31 mm×0.28 mm respectively, were used for X-ray diffraction data collection with a BRUKER SMART 1000 CCD, all using graphite-monochromated Mo Kα radiation (λ=0.071 073 nm). The structures were solved primarily by direct methods and refined by the full-matrix least squares method. The computations were performed with the SHELX-97 program^[30]. All non-hydrogen atoms were refined with anisotropic thermal parameters. The hydrogen atoms were set in calculated positions and refined as riding atoms with a common fixed isotropic thermal parameter. The crystal data and refinement parameters of complexes 1 and 2 are summarized in Table 1.

  表 1

  

  表 1  Crystal data and structure refinement for complexes 1 and 2

  Table 1.  Crystal data and structure refinement for complexes 1 and 2

  下载: 导出CSV

  Complex	1	2
  Empirical formula	C40H54Br4Gd2N4O22	C40H50Br4Dy2N4O20
  Formula weight	1 577.01	1 551.44
  T/K	173(2)	173(2)
  Crystal system	Triclinic	Monoclinic
  Space group	P1	P21/c
  a/nm	1.093 9(8)	1.188 5(6)
  b/nm	1.128 8(9)	2.513 6(12)
  c/nm	1.310 5(9)	0.835 8(5)
  α/(°)	103.689(13)
  β/(°)	100.567(15)	95.923(7)
  γ/(°)	116.970(12)
  V/nm3	1.319 9(16)	2.484(2)
  Z	1	2
  Dc/(g·cm-3)	1.984	2.075
  μ/mm-1	5.598	6.283
  Rint	0.033 2	0.056 1
  F(000)	766	1 500
  Reflection collected	9 747	17 798
  GOF on F2	1.016	1.015
  R1a[I > 2σ(I)]	0.038 7	0.042 7
  wR2b[I > 2σ(I)]	0.100 7	0.097 8
  aR1=∑(‖Fo|-|Fc‖)/∑|Fo|; bwR2={∑w(Fo2-Fc2)2/∑w(Fo)2}1/2.

  CCDC: 1570377, 1; 1570378, 2.

  2.   Results and discussion

  2.1   Crystal structures of complexes 1 and 2

  The crystal structure of complex 1 is depicted in Fig. 1. Complex 1 crystallizes in the space group of P1 in triclinic structure. Two symmetric nine-coordinated Gd(Ⅲ) ions are bridged by two phenoxide groups from two Schiff base ligands and two molecules of formate ion with Gd-O_phenoxide bond length of 0.241 7(5) and 0.237 4(3) nm, respectively. Then, each Gd(Ⅲ) ion is further coordinated with two N ions, one O_hydroxyl ion and one O_methoxyl ion. The intramolecular Gd…Gd distance is 0.376 6(2) nm, as well as Gd-O-Gd angle of 103.65(3)°.

  图 1

  

  图 1  Crystal structure of complex 1 with thermal ellipsoids drawn at 30% probability

  Figure 1.  Crystal structure of complex 1 with thermal ellipsoids drawn at 30% probability

  下载: 全尺寸图片 幻灯片

  Complex 2 crystallize in monoclinic with space group of P2₁/c (Fig. 2). The crystal structure of complex 2 is similar to complex 1 except that Dy(Ⅲ) ions are bridged by two acetate ions instead of formate ions. The Dy-O and Dy-N distances are in the range of 0.228 9(4)~0.265 0(4) nm and 0.257 7(3)~0.262 9(2) nm, respectively. The intramolecular Dy…Dy distance is 0.375 7(1) nm with Dy-O-Dy angle of 103.30(5)°. Selected bond lengths and angles for two complexes are shown in Table 2.

  图 2

  

  图 2  Crystal structure of complex 2 with thermal ellipsoids drawn at 30% probability

  Figure 2.  Crystal structure of complex 2 with thermal ellipsoids drawn at 30% probability

  下载: 全尺寸图片 幻灯片

  表 2

  

  表 2  Selected bond lengths (nm) and angles (°) for complexes 1 and 2

  Table 2.  Selected bond lengths (nm) and angles (°) for complexes 1 and 2

  下载: 导出CSV

  1
  Gd(1)-O(2)	0.228 6(4)	Gd(1)-O(7)a	0.244 0(4)	Gd(1)-O(3)	0.263 7(4)
  Gd(1)-O(4)a	0.237 2(4)	Gd(1)-O(6)	0.245 3(4)	Gd(1)-Gd(1)a	0.376 7(3)
  Gd(1)-O(5)	0.240 7(4)	Gd(1)-N(2)	0.259 2(6)	O(3)-C(10)	0.138 0(7)
  Gd(1)-O(4)	0.241 8(4)	Gd(1)-N(1)a	0.259 3(6)	O(3)-C(9)	0.142 9(7)
  O(2)-Gd(1)-O(4)a	139.32(1)	O(2)-Gd(1)-O(4)	135.76(1)	O(2)-Gd(1)-O(7)a	130.99(2)
  O(2)-Gd(1)-O(5)	85.39(1)	O(4)a-Gd(1)-O(4)	76.31(1)	O(4)a-Gd(1)-O(7)a	76.04(2)
  O(4)a-Gd(1)-O(5)	77.67(1)	O(5)-Gd(1)-O(4)	77.91(1)	O(5)-Gd(1)-O(7)a	143.18(2)
  2
  Dy(1)-O(6)	0.229 0(4)	Dy(1)-O(4)	0.242 3(4)	Dy(1)-O(5)	0.265 0(4)
  Dy(1)-O(4)a	0.236 8(4)	Dy(1)-O(7)	0.246 6(4)	Dy(1)-Dy(1)a	0.375 7(4)
  Dy(1)-O(3)	0.237 9(4)	Dy(1)-N(1)a	0.257 8(5)	O(3)-C(10)	0.124 5(8)
  Dy(1)-O(2)a	0.241 2(4)	Dy(1)-N(2)	0.262 9(6)	O(7)-C(18)	0.141 8(8)
  O(6)-Dy(1)-O(4)a	140.38(1)	O(6)-Dy(1)-O(2)a	130.53(1)	O(6)-Dy(1)-O(4)	134.74(2)
  O(6)-Dy(1)-O(3)	86.24(1)	O(4)a-Dy(1)-O(2)a	76.99(1)	O(4)a-Dy(1)-O(4)	76.70(2)
  O(4)a-Dy(1)-O(3)	79.21(1)	O(3)-Dy(1)-O(2)a	141.49(1)	O(3)-Dy(1)-O(4)	75.67(2)
  Symmetry codes: a: -x, -y, -z for 1; a: -x+1, -y, -z+2 for 2.

  2.2   Magnetic properties of complex 1

  Variable-temperature magnetic susceptibilities of complexes 1 and 2 were measured from 300 to 2.0 K in an applied field of 1 kOe. As showed in Fig. 3, the χ_MT value for complex 1 at 300 K is 15.67 cm³·K·mol^-1, which is in agreement with the expected value of 15.76 cm³·K·mol^-1 for two uncoupled Gd(Ⅲ) ions (⁸S_7/2, S=7/2). The χ_MT value is almost constant until the temperature cooling to 30 K, after that, this value decreases rapidly, reaching a minimum value of 11.04 cm³·K·mol^-1 at 2.0 K. This phenomenon indicates the presence of a weak antiferromagnetic interaction between the Gd(Ⅲ) ions.

  图 3

  

  图 3  Temperature dependence of χ_MT for complex 1

  Figure 3.  Temperature dependence of χ_MT for complex 1

  下载: 全尺寸图片 幻灯片

  To evaluate the coupling parameters, the magnetic data were analyzed by a theoretical expression^[31]. The best fit from equation below gives g=1.99, J=-0.1348 which confirms the weak antiferromagnetic interaction between the Gd ions.

  $ \begin{array}{l} {\chi _{\rm{M}}} = \frac{{2N_g^2{\beta ^2}}}{{kT}} \cdot \frac{{\exp \left( y \right) + 5\exp \left( {3y} \right) + 14\exp \left( {6y} \right) + 30\exp \left( {10y} \right) + 55\exp \left( {15y} \right) + 91\exp \left( {21y} \right) + 140\exp \left( {28y} \right)}}{{\exp \left( y \right) + 5\exp \left( {3y} \right) + 7\exp \left( {6y} \right) + 9\exp \left( {10y} \right) + 11\exp \left( {15y} \right) + 13\exp \left( {21y} \right) + 15\exp \left( {28y} \right)}}\\ y = J/\left( {kT} \right) \end{array} $

  2.3   Magnetic properties of complex 2

  For complex 2 (Fig. 4), at room temperature, the χ_MT value (28.61 cm³·K·mol^-1) is close to the theoretical value of 28.34 cm³·K·mol^-1 for two non-interacting Dy(Ⅲ) ions (⁶H_15/2, g=4/3). Upon cooling, the χ_MT value decreases gradually in the temperature range of 300~50 K, then drops quickly and reaches 6.8 cm³·K·mol^-1 at 2 K. This observed decrease of χ_MT value under high temperatures results from the depopulation of the excited Stark sublevels. However, the decrease behavior at low temperature mainly results from intramolecular antiferromagnetic interaction between Dy(Ⅲ) ions^[32].

  图 4

  

  图 4  Temperature dependence of χ_MT for complex 2

  Figure 4.  Temperature dependence of χ_MT for complex 2

  下载: 全尺寸图片 幻灯片

  To investigate the dynamic magnetic properties of complex 2, the temperature frequency dependencies of magnetic susceptibility measurements under alternat-ing current were measured in the range of 200~1 400 Hz. As shown in Fig. 5, no maximum in-phase signal(χ') and out-of-phase signal (χ") values are observed until 2 K which might arise from the quantum tunneling of magnetization (QTM). However, the values of in-phase signal (χ') and out-of-phase signal (χ") exhibit a frequency dependent character, indicating the slow relaxation of magnetization.

  图 5

  

  图 5  In-phase (a) and out-of-phase susceptibilities (b) of complex 2 at different frequencies under zero applied field

  Figure 5.  In-phase (a) and out-of-phase susceptibilities (b) of complex 2 at different frequencies under zero applied field

  下载: 全尺寸图片 幻灯片

  3.   Conclusions

  Two novel dinuclear Ln(Ⅲ) based complexes have been successfully synthesized. These two complexes have similar structures, in which two symmetric nine-coordinated Ln(Ⅲ) ions are bridged by two phenoxide groups from two Schiff base ligands, two molecules of formate ion for 1 and acetate ion for 2. The magnetic studies show that weak antiferromagnetic interaction between the Gd ions existing in complex 1, while complex 2 shows slow relaxation of magnetization.

• 1. [1]

     Vincent R, Klyatskaya S, Ruben M, et al. Nature, 2012, 488:357-360 doi: 10.1038/nature11341

  2. [2]

     Thiele S, Balestro F, Ballou R, et al. Science, 2014, 344:1135-1138 doi: 10.1126/science.1249802

  3. [3]

     Bar A K, Pichon C, Gogoi N. Chem. Commun., 2015, 51:3616-3619 doi: 10.1039/C4CC10182K

  4. [4]

     Cervetti C, Rettori A, Pini M G, et al. Nat. Mater., 2016, 15:164-168 doi: 10.1038/nmat4490

  5. [5]

     李承辉, 顾志国, 左景林, 等.无机化学学报, 2007, 23(9):1583-1586 http://www.airitilibrary.com/Publication/alDetailedMesh?DocID=10014861-200709-23-9-1582-1586-aLI Cheng-Hui, GU Zhi-Guo, ZUO Jing-Lin, et al. Chinese J. Inorg. Chem., 2007, 23(9):1583-1586 http://www.airitilibrary.com/Publication/alDetailedMesh?DocID=10014861-200709-23-9-1582-1586-a

  6. [6]

     Pointillart F, Gal Y L, Golhen S, et al. Dalton Trans., 2013, 42:1949-1960 doi: 10.1039/C2DT32150E

  7. [7]

     Hu P, Gao Y Y, Xiao F P, et al. Polyhedron, 2017, 130:40-46 doi: 10.1016/j.poly.2017.03.021

  8. [8]

     Han H, Li X, Zhu X, et al. Eur. J. Inorg. Chem., 2017:2088-2093

  9. [9]

     Du F X, Hu P, Gao Y Y, et al. Inorg. Chem. Commun., 2014, 48:166-170 doi: 10.1016/j.inoche.2014.08.035

  10. [10]

      Escobar L B L, Guedes G P, Soriano S, et al. Inorg. Chem., 2014, 53:7508-7517 doi: 10.1021/ic5008044

  11. [11]

      Li C, Sun J, Yang M, et al. Cryst. Growth Des., 2016, 16:7155-7162 doi: 10.1021/acs.cgd.6b01369

  12. [12]

      Hu P, Guo H F, Li Y, et al. Inorg. Chem. Commun., 2015, 59:91-94 doi: 10.1016/j.inoche.2015.07.003

  13. [13]

      刘遂军, 崔雨, 宋伟朝, 等.无机化学学报, 2015, 31(9):1894-1902 http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=wjhxxb201509025LIU Sui-Jun, CUI Yu, SONG Wei-Chao, et al. Chinese J. Inorg. Chem., 2015, 31(9):1894-1902 http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=wjhxxb201509025

  14. [14]

      胡鹏, 高媛媛, 肖凤仪, 等.无机化学学报, 2017, 33(1):34-40 http://en.cnki.com.cn/Article_en/CJFDTotal-WJHX201701004.htmHU Peng, GAO Yuan-Yuan, XIAO Feng-Yi, et al. Chinese J. Inorg. Chem., 2017, 33(1):34-40 http://en.cnki.com.cn/Article_en/CJFDTotal-WJHX201701004.htm

  15. [15]

      Yang M, Li H D, Li L C. Inorg. Chem. Commun., 2017, 76:59-61 doi: 10.1016/j.inoche.2017.01.014

  16. [16]

      Ding Y S, Chilton N F, Winpenny R E P, et al. Angew. Chem. Int. Ed., 2016, 55:1-5 doi: 10.1002/anie.201510990

  17. [17]

      Guo F S, Day B M, Chen Y C, et al. Angew. Chem. Int. Ed., 2017, 56:1-6 doi: 10.1002/anie.201610955

  18. [18]

      Sorace L, Benelli C, Gatteschi D. Chem. Soc. Rev., 2011, 40:3092-3104 doi: 10.1039/c0cs00185f

  19. [19]

      Guo Y N, Chen X H, Xue S, et al. Inorg. Chem., 2011, 50:9705-9713 doi: 10.1021/ic2014978

  20. [20]

      Guo Y N, Xu G F, Wernsdorfer W, et al. J. Am. Chem. Soc., 2011, 133:11948-11951 doi: 10.1021/ja205035g

  21. [21]

      Xue S F, Guo Y N, Ungur L, et al. Chem. Eur. J., 2015, 12:14099-14106 https://www.sciencedirect.com/science/article/pii/S1387700317304458

  22. [22]

      Zhang L, Jung J L, Zhang P, et al. Chem. Eur. J., 2016, 22:1392-1398 doi: 10.1002/chem.201503422

  23. [23]

      Zhang K, Yuan C, Guo F S, et al. Dalton Trans., 2017, 46:186-192 doi: 10.1039/C6DT04231G

  24. [24]

      Li M, Wu H P, Zhang S, et al. Eur. J. Inorg. Chem., 2017:811-819

  25. [25]

      Zhang K, Guo F S, Wang Y Y. Inorg. Chem. Commun., 2017, 76:95-99 doi: 10.1016/j.inoche.2017.01.005

  26. [26]

      Bag P, Rastogi C K, Biswas S, et al. Dalton Trans., 2015, 44:4328-4340 doi: 10.1039/C4DT03429E

  27. [27]

      Biswas S, Das S, Hossain S, et al. Eur. J. Inorg. Chem., 2016:4683-4692 doi: 10.1002/ejic.v2016.28/issuetoc

  28. [28]

      Hutchings A J, Habib F, Holmberg R J, et al. Inorg. Chem., 2014, 53:2102-2112 doi: 10.1021/ic402682r

  29. [29]

      许涛, 李连之, 冀海伟.合成化学, 2004, 12:22-24 doi: 10.3969/j.issn.1005-1511.2004.01.009XU Tao, LI Lian-Zhi, JI Hai-Wei. Chinese Journal of Synthetic Chemistry, 2004, 12:22-24 doi: 10.3969/j.issn.1005-1511.2004.01.009

  30. [30]

      Sheldrick G M. SHELXS-97, Program for the Refinement of Crystal Structures, University of Göttingen, Germany, 1997.

  31. [31]

      Mukherjee S, Lu J J, Velmurugan G, et al. Inorg. Chem., 2016, 55:11283-11298 doi: 10.1021/acs.inorgchem.6b01863

  32. [32]

      Kahn M L, Ballou R, Porcher P, et al. Chem. Eur. J., 2002, 8:525-531 doi: 10.1002/(ISSN)1521-3765

• 

  Scheme 1  Molecular structure of HL

  下载: 全尺寸图片 幻灯片
  

  Figure 1  Crystal structure of complex 1 with thermal ellipsoids drawn at 30% probability

  All hydrogen atoms are omitted for clarity; Symmetry codes: a:-x, -y, -z

  下载: 全尺寸图片 幻灯片
  

  Figure 2  Crystal structure of complex 2 with thermal ellipsoids drawn at 30% probability

  All hydrogen atoms are omitted for clarity; Symmetry codes: a:-x+1, -y, -z+2

  下载: 全尺寸图片 幻灯片
  

  Figure 3  Temperature dependence of χ_MT for complex 1

  Solid line represents the theoretical values based on the corresponding equation

  下载: 全尺寸图片 幻灯片
  

  Figure 4  Temperature dependence of χ_MT for complex 2

  下载: 全尺寸图片 幻灯片
  

  Figure 5  In-phase (a) and out-of-phase susceptibilities (b) of complex 2 at different frequencies under zero applied field

  下载: 全尺寸图片 幻灯片

  Table 1.  Crystal data and structure refinement for complexes 1 and 2

  Complex	1	2
  Empirical formula	C40H54Br4Gd2N4O22	C40H50Br4Dy2N4O20
  Formula weight	1 577.01	1 551.44
  T/K	173(2)	173(2)
  Crystal system	Triclinic	Monoclinic
  Space group	P1	P21/c
  a/nm	1.093 9(8)	1.188 5(6)
  b/nm	1.128 8(9)	2.513 6(12)
  c/nm	1.310 5(9)	0.835 8(5)
  α/(°)	103.689(13)
  β/(°)	100.567(15)	95.923(7)
  γ/(°)	116.970(12)
  V/nm3	1.319 9(16)	2.484(2)
  Z	1	2
  Dc/(g·cm-3)	1.984	2.075
  μ/mm-1	5.598	6.283
  Rint	0.033 2	0.056 1
  F(000)	766	1 500
  Reflection collected	9 747	17 798
  GOF on F2	1.016	1.015
  R1a[I > 2σ(I)]	0.038 7	0.042 7
  wR2b[I > 2σ(I)]	0.100 7	0.097 8
  aR1=∑(‖Fo|-|Fc‖)/∑|Fo|; bwR2={∑w(Fo2-Fc2)2/∑w(Fo)2}1/2.

  下载: 导出CSV

  Table 2.  Selected bond lengths (nm) and angles (°) for complexes 1 and 2

  1
  Gd(1)-O(2)	0.228 6(4)	Gd(1)-O(7)a	0.244 0(4)	Gd(1)-O(3)	0.263 7(4)
  Gd(1)-O(4)a	0.237 2(4)	Gd(1)-O(6)	0.245 3(4)	Gd(1)-Gd(1)a	0.376 7(3)
  Gd(1)-O(5)	0.240 7(4)	Gd(1)-N(2)	0.259 2(6)	O(3)-C(10)	0.138 0(7)
  Gd(1)-O(4)	0.241 8(4)	Gd(1)-N(1)a	0.259 3(6)	O(3)-C(9)	0.142 9(7)
  O(2)-Gd(1)-O(4)a	139.32(1)	O(2)-Gd(1)-O(4)	135.76(1)	O(2)-Gd(1)-O(7)a	130.99(2)
  O(2)-Gd(1)-O(5)	85.39(1)	O(4)a-Gd(1)-O(4)	76.31(1)	O(4)a-Gd(1)-O(7)a	76.04(2)
  O(4)a-Gd(1)-O(5)	77.67(1)	O(5)-Gd(1)-O(4)	77.91(1)	O(5)-Gd(1)-O(7)a	143.18(2)
  2
  Dy(1)-O(6)	0.229 0(4)	Dy(1)-O(4)	0.242 3(4)	Dy(1)-O(5)	0.265 0(4)
  Dy(1)-O(4)a	0.236 8(4)	Dy(1)-O(7)	0.246 6(4)	Dy(1)-Dy(1)a	0.375 7(4)
  Dy(1)-O(3)	0.237 9(4)	Dy(1)-N(1)a	0.257 8(5)	O(3)-C(10)	0.124 5(8)
  Dy(1)-O(2)a	0.241 2(4)	Dy(1)-N(2)	0.262 9(6)	O(7)-C(18)	0.141 8(8)
  O(6)-Dy(1)-O(4)a	140.38(1)	O(6)-Dy(1)-O(2)a	130.53(1)	O(6)-Dy(1)-O(4)	134.74(2)
  O(6)-Dy(1)-O(3)	86.24(1)	O(4)a-Dy(1)-O(2)a	76.99(1)	O(4)a-Dy(1)-O(4)	76.70(2)
  O(4)a-Dy(1)-O(3)	79.21(1)	O(3)-Dy(1)-O(2)a	141.49(1)	O(3)-Dy(1)-O(4)	75.67(2)
  Symmetry codes: a: -x, -y, -z for 1; a: -x+1, -y, -z+2 for 2.

  下载: 导出CSV
•