Effect of Acetonitrile on the Colloidal Behavior of Conventional Cationic Surfactants: A Combined Conductivity, Surface Tension, Fluorescence and FTIR Study
Effect of Acetonitrile on the Colloidal Behavior of Conventional Cationic Surfactants: A Combined Conductivity, Surface Tension, Fluorescence and FTIR Study
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DOI：
10.1007/s10953-019-00937-4
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发表时间：
2020-01-01
影响因子：
1.2
通讯作者：
Panda, Sandhyarani
中科院分区：
文献类型：
--
作者：
Banjare, Ramesh Kumar;Banjare, Manoj Kumar;Panda, Sandhyarani
采用电导率、表面张力、荧光光谱和红外光谱等技术，研究了四种阳离子表面活性剂（TTAB、CTAB、CPC和CPB）对乙腈（ACN）的作用。显着的胶束，界面和热力学性质进行了研究的张力和电导率的方法。以芘为探针，用稳态荧光法研究了临界胶束浓度（CMC）、聚集数（N-agg）和Stern-Volmer常数（K-sv）。荧光研究也支持从电导率和表面张力获得的CMC结果。使用FTIR确定表面活性剂与ACN之间的分子间相互作用（例如氢键、离子-离子对相互作用和诱导偶极相互作用）的强度取决于表面活性剂的头基。表面活性剂与ACN的相互作用在能量上是有利的，并且通过表面活性剂与ACN之间的直接相互作用发生。结果表明，表面活性剂与丙烯腈的相互作用强度依次为TTAB > CTAB > CPC > CPB。
A comprehensive study the effect of acetonitrile (ACN) with four cationic surfactants, viz. tetradecyltrimethylammonium bromide (TTAB), cetyltrimethylammonium bromide (CTAB), cetylpyridinium chloride (CPC) and cetylpyridinium bromide (CPB) was made by using the conductivity, surface tension, fluorescence and FTIR techniques. Significant micellar, interfacial and thermodynamic properties were studied by the tensiometeric and conductivity methods. The critical micelle concentration (CMC), aggregation number (N-agg), and Stern-Volmer constants (K-sv) have also been studied by the steady state fluorescence method using pyrene as probe. The fluorescence study also supports the CMC results obtained from conductivity and surface tension. FTIR was used to ascertain that the strength of intermolecular interactions such as hydrogen bonding, ion-ion pair interactions and induced dipole interactions between the surfactants and ACN depend upon the head-group of the surfactants. The interaction of surfactants with ACN is energetically favorable and occurs via direct interactions between the surfactants and ACN. The results further revealed that the strength of interactions between the surfactants and ACN follows the order: TTAB > CTAB > CPC > CPB.