摘要
以间苯二甲醛分别与异烟肼、烟酸酰肼和2-吡啶甲酰肼反应,合成了3种含吡啶环的Schiff base配体间苯二甲醛双缩4-吡啶甲酰腙(S1)、间苯二甲醛双缩3-吡啶甲酰腙(S2)和间苯二甲醛双缩2-吡啶甲酰腙(S3);测试了这3个化合物与醋酸铜通过配位作用在不同溶剂中形成金属凝胶的能力,结果发现,配体S1与醋酸铜在DMF/H_2O和DMSO/H_2O的混合溶剂中、配体S3与醋酸铜在DMF/H_2O的混合溶剂中均可以形成金属凝胶。胶凝测试结果表明,吡啶环上N原子位置的不同,对化合物形成金属凝胶的能力有极大影响。利用扫描电子显微镜(SEM)观察了金属凝胶的微观形貌,结果表明,配体分子的结构对金属凝胶的微观形貌也有较大影响;红外光谱和紫外可见光谱的研究证明了配位作用在金属凝胶形成过程中的推动作用;X射线衍射分析(XRD)研究表明,配体S1与醋酸铜在两种混合溶剂中形成的金属凝胶均表现出了四方堆积结构。
Three Schiff base ligands containing two pyridine rings,isophthalaldehyde-bis（ 4-pyridine formyl hydrazone）（ S1）,isophthalaldehyde-bis（ 3-pyridine formyl hydrazone）（ S2） and isophthalaldehyde-bis（ 2-pyridine formyl hydrazone）（ S3）,have been synthesized with isophthalaldehyde and one of isonicotinyl hydrazine,nicotinic hydrazine and 2-pyridine-carboxylic acid hydrazine as raw materials. The gelation behaviors of the three Schiff base ligands with Cu（ Ac）_2 in different solvents were tested,and three Cu（ Ⅱ）-metallogels were obtained. The gelation test results show that a slight variation in ligand structures can lead to dramatic changes in gelation abilities of ligands. The microstructures of metallogels observed by SEM reveal that the morphology of a metallogel depends on the structure of the ligand. FT-IR and UV / Vis spectroscopy studies reveal that the coordination interaction between Schiff base ligands and Cu（ Ⅱ） plays an important role for the formation and maintenance of metallogels. The XRD analysis demonstrates that two metallogels formed by ligand S1 and Cu（ Ac）_2 in two mixed solvents take the same tetragonal packing mode.
出处
《应用化学》
CAS
CSCD
北大核心
2016年第7期804-812,共9页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金(21403166)
西安市科技计划创新基金(CXY1531WL19
CXY1443WL1)
陕西省分析化学重点学科经费资助~~
