Highly efficient electrochemiluminescence based on pyrazolecarboxylic metal organic framework

作者：Feng, Chao; Ma, Yu-Heng; Zhang, Duo; Li, Xue-Jing; Zhao, Hong^*

来源：Dalton Transactions, 2016, 45(12): 5081-5091.

DOI：10.1039/c5dt04740d

• HIGH H-2 ADSORPTION
• CDSE QUANTUM DOTS
• ELECTROGENERATED CHEMILUMINESCENCE
• MAGNETIC-PROPERTIES
• COORDINATION POLYMER
• CRYSTAL-STRUCTURE
• ACTIVE-SITES
• WATER
• NANOCRYSTALS
• COMPLEXES

A series of transition metal complexes with the ligands 3-pyrazoledicarboxylic acid (H2L1) and ethyl 1-(2-ethoxy-2-oxoethyl)-1H-pyrazole-3-carboxylate (epzc) have been synthesized. The epzc generated 1-(carboxymethyl)-1H-pyrazole-3-carboxylic acid (H2L2) by an in situ hydrothermal hydrolysis reaction, using a one-pot method. Simple mononuclear [Co(HL1)(2)(H2O)(2)] (1) and [Ni(L-2)(H2O)(4)] (4), dinuclear [Ni-2(L-1)(2)(H2O)(6)]center dot H2O (2) and [Cu-2(L-2)(2)(H2O)(4)] (5) and 2D frameworks [Cu-2(L-1)(2)](n) (3), [Co-2(L-2)(2)(H2O)(4)](n) (6) have been isolated. The structures have been established by single-crystal X-ray diffraction, and the complexes characterized by FT-IR, thermogravimetric analysis (TGA), PRXD, UV-Vis spectroscopy, and fluorescent spectroscopy. 1, 2, 4 and 5 were further assembled to form a supramolecular structure by hydrogen-bonding interactions and/or pi center dot center dot center dot pi stacking. 3 and 6 both possess a 2D network structure that is further interlinked via intermolecular hydrogen-bonding interactions. Most importantly, the complexes demonstrated highly intense electrochemiluminescence (ECL) in DMF solution.

• 出版日期2016
• 单位东南大学