纳米硫化钴与明胶蛋白质的原位键合作用研究

doi:10.7517/j.issn.1674-0475.2011.04.297

影像科学与光化学 ›› 2011, Vol. 29 ›› Issue (4): 297-305.DOI: 10.7517/j.issn.1674-0475.2011.04.297

纳米硫化钴与明胶蛋白质的原位键合作用研究

肖新光, 黎幼群, 唐世华

广西民族大学化学与生态工程学院广西林产化学品开发与应用重点实验室, 广西南宁530006

收稿日期:2011-02-08 修回日期:2011-04-21 出版日期:2011-07-23 发布日期:2011-07-23
通讯作者: 唐世华
基金资助:
国家自然科学基金(21067001);广西省自然科学基金(0991083)

Study on the In Situ Binding of Nano-CoS to Gelatin

XIAO Xin-guang, LI You-qun, TANG Shi-hua

Key Laboratory of Development and Application of Forest Chemicals of Guangxi, College of Chemistry and Ecological Engineering, Guangxi University for Nationalities, Nanning 530006, Guangxi, P.R.China

Received:2011-02-08 Revised:2011-04-21 Online:2011-07-23 Published:2011-07-23

摘要/Abstract

摘要： 利用紫外-可见吸收光谱(UV-Vis)和傅里叶变换红外光谱(FT-IR),研究了pH值11.00时,不同温度下CoS纳米粒子与明胶蛋白质的键合作用.根据吸光度与CoS浓度的关系,由Lineweave-Burk方程计算了不同温度下CoS纳米粒子与明胶蛋白作用的键合常数K(温度为293 K时键合常数K为3.01×10³L/mol;温度为301 K时键合常数K为2.12×10³L/mol;温度为313 K时键合常数K为1.85×10³L/mol)以及对应温度下反应的热力学参数(ΔrH_m=-17.93 kJ/mol;ΔrS_m=4.93 J/(K.mol);ΔrG_m=-19.37/-19.41/-19.47kJ/mol).CoS纳米粒子与明胶蛋白之间主要靠静电力结合.研究结果为初步探索纳米颗粒与纤维状蛋白质之间相互作用的化学机制提供了必要的信息.

关键词: 纳米硫化钴, 明胶, 原位键合作用

Abstract: The in situ binding of CoS nanoparticles to gelatin was studied using UV-visible and FT-IR methods at pH 11.00 and different temperatures.The absorbance data were analyzed according to Lineweave-Burk double-reciprocal equation.K,the binding constants of the compound at different temperatures(293 K: 3.01×10³L/mol;301 K: 2.12×10³ L/mol;313 K: 1.85×10³ L/mol) and the thermodynamic parameters(ΔrH_m =-17.93 kJ/mol;ΔrS_m =4.93 J/K·mol;ΔrG_m =-19.37/-19.41/-19.47 kJ/mol) at correspondence temperatures were obtained.The negative enthalpy(ΔrH_m) and positive entropy(ΔrS_m) values indicate that electrostatic force played the major roles in the binding reaction of nano-CoS with gelatin.The results provide useful information for exploring the chemical mechanism of interaction between nanoparticle and fibrous protein.

Key words: nano-CoS, gelatin, in situ binding reaction

中图分类号:

TQ171
O64

肖新光, 黎幼群, 唐世华. 纳米硫化钴与明胶蛋白质的原位键合作用研究[J]. 影像科学与光化学, 2011, 29(4): 297-305.

XIAO Xin-guang, LI You-qun, TANG Shi-hua. Study on the In Situ Binding of Nano-CoS to Gelatin[J]. Imaging Science and Photochemistry, 2011, 29(4): 297-305.

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纳米硫化钴与明胶蛋白质的原位键合作用研究

Study on the In Situ Binding of Nano-CoS to Gelatin

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