
人工晶体学报 ›› 2026, Vol. 55 ›› Issue (2): 314-324.DOI: 10.16553/j.cnki.issn1000-985x.2025.0198
黄秋萍(
), 杨思明, 郑燕菲, 庞华钰, 黄秋婵(
), 张海全(
)
收稿日期:2025-09-10
出版日期:2026-02-20
发布日期:2026-03-06
通信作者:
黄秋婵,教授。E-mail:547249164@qq.com;张海全,副教授。E-mail:472401152@qq.com
作者简介:黄秋萍(1990—),女,广西壮族自治区人,副教授。E-mail:469500801@qq.com
基金资助:
HUANG Qiuping(
), YANG Siming, ZHENG Yanfei, PANG Huayu, HUANG Qiuchan(
), ZHANG Haiquan(
)
Received:2025-09-10
Online:2026-02-20
Published:2026-03-06
摘要: 通过溶剂热法,以4-甲基-1,2,3-噻二唑-5-甲酸(HL)为配体,与六水合硝酸镧反应,合成噻二唑镧配合物[LaL3(H2O)2]n,通过单晶X射线衍射、红外光谱和元素分析对配合物的结构进行表征。通过紫外(UV)和荧光光谱研究镧配合物与小牛胸腺DNA(CT-DNA)和人血清蛋白(HSA)的相互作用。单晶结构测试表明,该配合物属于三斜晶系,P1空间群,晶胞参数为a=0.979 88(5) nm,b=1.057 26(6) nm,c=1.103 62(5) nm,α=105.134(5)°,β=109.816(4)°,γ=94.221(4)°,Z=2,V=1.021 65(10) nm3,Dc=1.974 g·cm-3,F(000)=598.0,Rint=0.057 3。该配合物由La3+与6个4-甲基-1,2,3-噻二唑-5-甲酸根及两个水分子配位形成九配位畸变的三帽三角棱柱构型,通过羧基氧桥接形成一维链,一维链通过N—H、S—H氢键及噻二唑环π-π堆积成三维图。紫外和荧光光谱分析表明配合物与CT-DNA和HSA存在相互作用,该配合物与CT-DNA的猝灭常数Ksv=4.75×104 L·mol-1,猝灭速率常数Kq=4.75×1012 L·mol-1·s-1,结合速率常数Ka=2.45×105 L·mol-1,结合位点n=1.18,由此可知配合物对CT-DNA的荧光猝灭是静态猝灭。与HSA的猝灭速率常数Ksv=9.83×104 L·mol-1,猝灭速率常数Kq=9.83×1012 L·mol-1·s-1,结合速率常数Ka=67.61 L·mol-1,结合位点n=0.39,配合物对HSA的荧光猝灭是静态猝灭。Hirshfeld分析显示分子间存在较强的H…H作用。
中图分类号:
黄秋萍, 杨思明, 郑燕菲, 庞华钰, 黄秋婵, 张海全. [LaL3(H2O)2] n 配合物的合成、晶体结构及与CT-DNA/HSA结合研究[J]. 人工晶体学报, 2026, 55(2): 314-324.
HUANG Qiuping, YANG Siming, ZHENG Yanfei, PANG Huayu, HUANG Qiuchan, ZHANG Haiquan. Synthesis, Crystal Structure and Binding CT-DNA/HSA of [LaL3(H2O)2] n Complex[J]. Journal of Synthetic Crystals, 2026, 55(2): 314-324.
| Complex | C12H16LaN6O8S3 |
|---|---|
| Formula weight | 607.40 |
| T/K | 100 |
| Crystal system | Triclinic |
| Crystal size/mm | 0.15×0.13×0.10 |
| Space group | P1 |
| a/nm | 0.979 88(5) |
| b/nm | 1.057 26(6) |
| c/nm | 1.103 62(5) |
| α/(°) | 105.134(5) |
| β/(°) | 109.816(4) |
| γ/(°) | 94.221(4) |
| V/nm3 | 1.021 65(10) |
| Z | 2 |
| Dc/(g·cm-3) | 1.974 |
| F(000) | 598.0 |
| θ range/(°) | 2.03≤θ≤26.37 |
| Range of h,k,l | -12≤h≤12,-13≤k≤13,-13≤l≤13 |
| Collected reflections | 19 931 |
| Unique reflections | 3 869 |
| Data/restraints/parameters | 4 147/0/276 |
| Absorption correction/mm-1 | 2.451 |
| Rint | 0.057 3 |
| R [I>2σ(I)] | R1 =0.026 8,wR2 = 0.068 0 |
| R[all data] | R1 = 0.028 9,wR2 = 0.069 1 |
| Goodness of fit | 1.089 |
| Largest diff. peak and hole/(e·nm-3) | 969 and -1 196 |
| CCDC/ICSD | 2486176 |
表1 配合物的晶体结构数据
Table 1 Crystal data structure of complex
| Complex | C12H16LaN6O8S3 |
|---|---|
| Formula weight | 607.40 |
| T/K | 100 |
| Crystal system | Triclinic |
| Crystal size/mm | 0.15×0.13×0.10 |
| Space group | P1 |
| a/nm | 0.979 88(5) |
| b/nm | 1.057 26(6) |
| c/nm | 1.103 62(5) |
| α/(°) | 105.134(5) |
| β/(°) | 109.816(4) |
| γ/(°) | 94.221(4) |
| V/nm3 | 1.021 65(10) |
| Z | 2 |
| Dc/(g·cm-3) | 1.974 |
| F(000) | 598.0 |
| θ range/(°) | 2.03≤θ≤26.37 |
| Range of h,k,l | -12≤h≤12,-13≤k≤13,-13≤l≤13 |
| Collected reflections | 19 931 |
| Unique reflections | 3 869 |
| Data/restraints/parameters | 4 147/0/276 |
| Absorption correction/mm-1 | 2.451 |
| Rint | 0.057 3 |
| R [I>2σ(I)] | R1 =0.026 8,wR2 = 0.068 0 |
| R[all data] | R1 = 0.028 9,wR2 = 0.069 1 |
| Goodness of fit | 1.089 |
| Largest diff. peak and hole/(e·nm-3) | 969 and -1 196 |
| CCDC/ICSD | 2486176 |
| Bond | Length/nm | Bond | Angle/(°) |
|---|---|---|---|
| La1—O8 | 0.258 8(2) | O8—La1—O5i | 98.89(6) |
| La1—O5i | 0.297 0(2) | O5—La1—O8 | 141.73(7) |
| La1—O5 | 0.253 3(2) | O5—La1—O5i | 76.37(7) |
| La1—O7 | 0.258 6(2) | O5—La1—O7 | 76.96(7) |
| La1—O2ii | 0.249 2(2) | O5—La1—O6i | 122.33(7) |
| La1—O3 | 0.247 0(2) | O7—La1—O8 | 120.71(7) |
| La1—O4i | 0.248 4(2) | O7—La1—O5i | 139.57(6) |
| La1—O1 | 0.247 2(2) | O2ii—La1—O8 | 73.22(7) |
| La1—O6i | 0.254 7(2) | O2ii—La1—O5i | 119.42(6) |
| O1—La1—O8 | 70.24(7) | O2ii—La1—O5 | 142.42(7) |
| O1—La1—O5 | 91.52(7) | O2ii—La1—O7 | 69.89(7) |
| O1—La1—O5i | 144.51(6) | O2ii—La1—O6i | 76.78(7) |
| O1—La1—O7 | 65.49(7) | O3—La1—O8 | 72.14(7) |
| O1—La1—O2ii | 90.52(7) | O3—La1—O5i | 67.28(7) |
| O1—La1—O4i | 139.72(7) | O3—La1—O5 | 71.10(7) |
| O1—La1—O6i | 138.67(7) | O3—La1—O7 | 129.55(7) |
| O3—La1—O4i | 129.88(7) | O3—La1—O2ii | 145.36(7) |
| O3—La1—O1 | 77.25(7) | O4i—La1—O2ii | 79.41(7) |
| O3—La1—O6i | 91.16(7) | O4i—La1—O6i | 76.97(7) |
| O4i—La1—O8 | 139.71(7) | O6i—La1—O8 | 68.45(7) |
| O4i—La1—O5i | 69.64(6) | O6i—La1—O5i | 46.70(6) |
| O4i—La1—O5 | 75.01(7) | O6i—La1—O7 | 139.23(7) |
| O4i—La1—O7 | 74.46(7) |
表2 [LaL3(H2O)2]n 主要的键长和键角数据
Table 2 Data of main bond lengths and bond angles of [LaL3(H2O)2]n
| Bond | Length/nm | Bond | Angle/(°) |
|---|---|---|---|
| La1—O8 | 0.258 8(2) | O8—La1—O5i | 98.89(6) |
| La1—O5i | 0.297 0(2) | O5—La1—O8 | 141.73(7) |
| La1—O5 | 0.253 3(2) | O5—La1—O5i | 76.37(7) |
| La1—O7 | 0.258 6(2) | O5—La1—O7 | 76.96(7) |
| La1—O2ii | 0.249 2(2) | O5—La1—O6i | 122.33(7) |
| La1—O3 | 0.247 0(2) | O7—La1—O8 | 120.71(7) |
| La1—O4i | 0.248 4(2) | O7—La1—O5i | 139.57(6) |
| La1—O1 | 0.247 2(2) | O2ii—La1—O8 | 73.22(7) |
| La1—O6i | 0.254 7(2) | O2ii—La1—O5i | 119.42(6) |
| O1—La1—O8 | 70.24(7) | O2ii—La1—O5 | 142.42(7) |
| O1—La1—O5 | 91.52(7) | O2ii—La1—O7 | 69.89(7) |
| O1—La1—O5i | 144.51(6) | O2ii—La1—O6i | 76.78(7) |
| O1—La1—O7 | 65.49(7) | O3—La1—O8 | 72.14(7) |
| O1—La1—O2ii | 90.52(7) | O3—La1—O5i | 67.28(7) |
| O1—La1—O4i | 139.72(7) | O3—La1—O5 | 71.10(7) |
| O1—La1—O6i | 138.67(7) | O3—La1—O7 | 129.55(7) |
| O3—La1—O4i | 129.88(7) | O3—La1—O2ii | 145.36(7) |
| O3—La1—O1 | 77.25(7) | O4i—La1—O2ii | 79.41(7) |
| O3—La1—O6i | 91.16(7) | O4i—La1—O6i | 76.97(7) |
| O4i—La1—O8 | 139.71(7) | O6i—La1—O8 | 68.45(7) |
| O4i—La1—O5i | 69.64(6) | O6i—La1—O5i | 46.70(6) |
| O4i—La1—O5 | 75.01(7) | O6i—La1—O7 | 139.23(7) |
| O4i—La1—O7 | 74.46(7) |
图12 配合物与CT-DNA相互作用对应的lg[(F0-F)/F]对lg[C]的关系图
Fig.12 Relationship between lg[(F0-F)/F]corresponding to interaction between complex with CT-DNA and lg[C]
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