Citation: REN Xiao-Lin, SONG Zhen, YANG Bin-Sheng. Spectral Studies on Complex of 2,6-Pyridine Diformylhydrazine 2-Hydroxylnaphthene Carboxylic Hydrazone-Cu(Ⅱ)-CopC[J]. Chinese Journal of Inorganic Chemistry, ;2015, 31(9): 1811-1819. doi: 10.11862/CJIC.2015.244 shu

Spectral Studies on Complex of 2,6-Pyridine Diformylhydrazine 2-Hydroxylnaphthene Carboxylic Hydrazone-Cu(Ⅱ)-CopC

1.
Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of Education Ministry, Shanxi University, Taiyuan 030006, China

Corresponding author: YANG Bin-Sheng,
Received Date: 25 May 2015
Available Online: 17 July 2015
Fund Project: 国家自然科学基金(No.20771068,20901048) (No.20771068,20901048)高等学校博士学科点专项科研基金(No.20131401110011)资助项目。 (No.20131401110011)

2, 6-Pyridine diformylhydrazine 2-hydroxylnaphthene carboxylic hydrazone (L1) was synthesized by acylation, esterification and aminolysis reaction. The effect of pH value on isomerization of L1 and the binding among L1, Cu(Ⅱ) and copper trafficking protein, apoCopC, were studied by using UV-Vis absorption, fluorescence spectra and fluorescence lifetime measurement. The results show that the binding constant is 3.32×10⁶ mol^-1·L for Cu(Ⅱ)-L1, 4.01×10⁵ mol^-1·L for L1-apoCopC, separately, in pH value of 7.4, 50 mmol·L^-1 Tris-HCl. Meanwhile, the binding constant between Cu(Ⅱ)-L1 and apoCopC is 8.09×10⁵ mol^-1·L. The average distance between the bound L1 and Trp83 of apoCopC from fluorescence resonance energy transfer was determined and the binding site of L1 in apoCopC, which locats at N-terminal, was shown by an automated public domain software package ArgusLab 4.0.1. The formation of a ternary complex, L1-Cu(Ⅱ)-CopC, is confirmed by the titration of Cu(Ⅱ) to L1-apoCopC in pH value of 7.4 and 50 mmol·L^-1 Tris-HCl.
- 2,6-pyridine diformylhydrazine 2-hydroxylnaphthene carboxylic hydrazone;copper(Ⅱ);copper trafficking protein;complex;spectra
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