摘要
设计合成了一种带有长链烷基和配位基团的新型有机配体2-吡啶甲醛-4'-十二烷氧基苯甲酰腙(简称L),并采用核磁(1H-NMR)、红外(FTIR)、电喷雾质谱(ESI-MS)和元素分析确认其结构.在乙醇和水的混合溶剂中,配体L可使溶剂凝胶化,并可与多种金属离子(Co(Ⅱ),Ni(Ⅱ),Zn(Ⅱ)和Cu(Ⅱ)作用,形成金属凝胶.采用扫描电镜分析表明,L自身形成的凝胶及金属凝胶的微观形貌均为相互搭接的纤维状结构.采用紫外光谱分析表明在乙醇溶液中L分子形成了聚集体.采用平板流变仪分析表明引入金属离子可提高凝胶的强度.进一步合成了L与Cu(Ⅱ)的配合物,通过对比配合物与金属凝胶的红外光谱和紫外光谱,证明金属凝胶中配体L与金属离子间形成了配位作用.
A novel organic ligand 2-pyridylaldehyde-4＇-dodecyloxybenzoyl hydrazone （L） with a long alkyl chain and a coordination group was designed and synthesized. The molecular structure of L was confirmed by 1H nuclear magnetic resonance （1H-NMR） spectrum, Fourier-transform infrared （FTIR） spectrum, eleetrospray ionization-mass （ESI-MS） spectrum and elemental analysis （EA）. L itself could gel the mixture of ethanol and water at suitable weight ratios to form white gels （defined as L gel） by mixing method. L could also gel the ethanol and water mixture with a series of metal ions,including Co（ 1I ） ,Ni（ I1 ） ,Zn（ I1 ） and Cu （ I1 ） to form metallogels. The SEM observation revealed that networks of fibers were formed in both the L gel and the Cu （ 11 ） based metallogels. As indicated by the ultraviolet （UV） absorption spectra, the drastic decrease in the extinction coefficient at Amax as the concentration of L confirmed the formation of aggregates of L molecules in ethanol. The rheological properties of the gel samples were tested by plate rheometer. The metallogels displayed improved strength and gel stability compared to L gel at the same gel concentration. Furthermore,the coordination complex of L and Cu（ II ） at molar ratio of 2：1 was synthesized and confirmed by ESI-MS. According to the FTIR spectra and UV absorption spectra of the coordination complex and the CuAc2 based metallogel,the coordination between L and metal ions was found to exist in the metallogel.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2013年第3期414-418,共5页
Acta Polymerica Sinica
基金
国家自然科学基金(基金号20874055和21174079)
国家高技术发展计划(863计划
项目号2009AA062903)资助项目
关键词
超分子凝胶
配体
金属凝胶
配位作用
Supramolecular gel, Ligand, Metallogel, Coordination
