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,(△/r)max=0.001,R1=0.0776,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.
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