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O,O′-二(4-甲苯基)二硫代磷酸-N,N-二乙铵的晶体结构、热稳定性及缓蚀性

谢斌1*,赖川1,相阳光1,邹立科1,向珍1,黄春1,易彬2   

  1. (1.四川理工学院功能材料研究所，绿色催化四川省高校重点实验室 自贡 643000;2.泸州品创科技有限公司 泸州 646000)
  • 收稿日期:2011-03-02 修回日期:2011-05-16 出版日期:2012-02-10 发布日期:2012-02-10
  • 通讯作者: 谢斌,教授; Tel:0813-5505969; Fax:0813-5505838; E-mail:xiebinqhg@sina.com.cn; 研究方向：有机合成、晶体结构和有机缓蚀剂
  • 基金资助:
    四川省教育厅项目(09ZA057)腐蚀与防护四川省高校重点实验室项目（2008CL03）四川省科技厅科技支撑计划项目（2010GZ0130）和泸州老窖科研奖学金项目（09ljzk10）资助

Crystal Structure, Thermal Stability and Corrosion Inhibition of N,N-Diethylammonium O,O′-Di(4-methylphenyl)dithiophosphate

XIE Bin1*, LAI Chuan1, XIANG Yangguang1, ZOU Like1, XIANG Zhen1, HUANG Chun1, YI Bin2   

  1. (1.Institute of Functional Materials,Sichuan University of Science & Engineering,
    Key Laboratory of Green Catalysis of Sichuan Institute of High Education,Zigong 643000,China;
    2.Luzhou Pinchuang Technology Co. Ltd.,Luzhou 646000,China)
  • Received:2011-03-02 Revised:2011-05-16 Published:2012-02-10 Online:2012-02-10

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摘要： 合成了O,O′-二(4-甲苯基)二硫代磷酸N,N-二乙铵（[Et2NH2][(4-MeC6H4O)2PS2]，NOP），采用元素分析、红外光谱、核磁共振谱和单晶X射线衍射测试技术对其结构进行了表征，同时研究了NOP的热稳定性和缓蚀性。 NOP晶体属单斜晶系，P21/n空间群，晶胞参数为：a=1.424 1(3) nm，b=2.008 7(4) nm，c=1.436 6(3) nm，V=3.959 9(15) nm3,Dc=1.286 Mg/m3，Z=8，F(000)=1.632，μ(MoKα)=0.360 mm-1,S=1.001,(Δ/σ)max=0.001,R1=0.077 6,wR2=0.174 9(I＞2σ(I))。 NOP的不对称结构单元中包括2个独立的子单元，2个子单元之间通过N-H…S氢键形成了一维链结构。 在H2SO4溶液中，NOP能有效抑制Q235钢的腐蚀，是一种抑制阳极反应为主的高效混合型缓蚀剂；NOP在Q235钢表面的吸附符合Langmuir吸附等温式，属自发进行的物理和化学吸附。 CCDC813309

关键词: O,O'-二烃基二硫代磷酸盐, 晶体结构, 热稳定性, 缓蚀剂, 吸附

Abstract: [Et2NH2][(4-MeC6H4O)2PS2](N,N-diethylammonium O,O′-di(4-methylphenyl)dithiophosphate,NOP) was synthesized and characterized by elemental analysis, IR, TG-DSC, and single crystal X-ray diffraction analysis. The thermal stability and corrosion inhibition were investigated. The crystallographic structure analysis reveals that the title compound crystallizes in monoclinic system, P 21/n space group, a=1.4241(3) nm， b=2.0087(4) nm， c=1.4366(3) nm， V=3.9599(15) nm3, Dc=1.286 Mg/m3， Z=8， F(000)=1.632， μ(MoKα)=0.360 mm-1,S=1.001,(Δ/σ)max=0.001, R1=0.077 6, wR2=0.174 9(I＞2σ(I)) .There are two independent subunits in the asymmetric structure unit of NOP, and infinite onedimensional chain structure is formed viaN-H…S hydrogen bonds between the subunits. The corrosion inhibition study showed that the NOP could effectively restrain corrosion of Q235 steel in H2SO4 solution. It was shown that the adsorption of NOP on the Q235 steel surface is consistent with the Langmuir adsorption isotherm, and the corrosion inhibition depends on both physical sorption and chemical sorptions. CCDC:813309

Key words: O,O&, prime, -dialkyldithiophosphate, crystal structure, thermal stability, corrosion inhibitor, adsorption

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