Chinese Journal of Applied Chemistry ›› 2017, Vol. 34 ›› Issue (3): 361-366.DOI: 10.11944/j.issn.1000-0518.2016.03.160232

• Full Papers • Previous Articles    

Synthesis and Spectroscopic Properties of a Cryptate Rare Earth Fluorescence Complex

CHANG Yu,XIE Wenbing,ZHOU Shihong,LI Junling,LIU Baofeng,PAN Lihua()   

  1. Laboratory of Polymer Composites Engineering, Changchun Institute of Applied Chemistry Chinese Academy of Sciences,Changchun 130022,China
  • Received:2016-06-02 Accepted:2016-08-25 Published:2017-02-27 Online:2017-02-27
  • Contact: PAN Lihua
  • Supported by:
    Supported by the Science and Technology Development Project of Jilin Province of China(No.20150204010YY)

Abstract:

A bifuntional cryptate chelate 2,6-{N,N',N,N'-[bis(2,2'-bipyridine-6,6'-dimethyl)]bis(aminomethyl)}-pyridine-3,5-diethyl diester for homogeneous time-resolved fluorimmunoassay product was synthesized from the raw material diethyl 2,6-dimethylpyridine-3,5-dicarboxylate through N-bromobutanimide(NBS) bromination, electrophilic substitution. The structure and property were confirmed by differential thermal analysis(DTA) Fourier transform infrared spectroscopy(FTIR), proton nuclear magnetic resonance spectroscopy(1H NMR) and mass spectrometry(MS). Also, the spectral properties of the Eu(Ⅲ)-cryptate chelate, such as absorption spectra, emission spectra, and fluorescence lifetime, were discussed. The fluorescence spectroscopic properties of Eu(Ⅲ)-cryptate are as follows: the excitation peak is at 322 nm, the narrow emission spectrum peaks are at 597 nm(5D0-7F1) and 618 nm(5D0-7F2), respectively, the Stokes shift is 290 nm, the fluorescence lifetime is 918 μs, and the fluorescence quantum yield is Φ=0.249.

Key words: homogeneous time-resolved fluorescence immunoassay, chelate, synthesis, cryptate bipyridine derivative