CAJ | 학술논문

核磁共振弛豫,自扩散以及2D NOESY谱研究结果表明:双子表面活性剂16-4-16溶液在形成胶束的过程中,联结基团及其邻近的碳氢链质子形成胶束的壳层,而距离离子头较远的疏水质子位于胶束的内部.与对应的单链的表面活性剂CTAB相比,其分子运动更受限制.2D NOESY谱显示联接基团及临近的碳氢链的质子间有较强的交叉峰,表明形成胶束时,分子在联结基团附近堆积的较为紧密.由2D NOESY谱计算得到的质子间距与HYPERCHEM模拟值有偏差,表明这些强交叉峰是分子间相互作用的结果,并且对应质子对在双子表面活性剂16-4-16分子中位于邻近的区域.因此我们推测,双子表面活性剂16-4-16分子在球形胶束中形成特殊的排列方式.
핵자공진이예,자확산이급2D NOESY보연구결과표명:쌍자표면활성제16-4-16용액재형성효속적과정중,련결기단급기린근적탄경련질자형성효속적각층,이거리리자두교원적소수질자위우효속적내부.여대응적단련적표면활성제CTAB상비,기분자운동경수한제.2D NOESY보현시련접기단급림근적탄경련적질자간유교강적교차봉,표명형성효속시,분자재련결기단부근퇴적적교위긴밀.유2D NOESY보계산득도적질자간거여HYPERCHEM모의치유편차,표명저사강교차봉시분자간상호작용적결과,병차대응질자대재쌍자표면활성제16-4-16분자중위우린근적구역.인차아문추측,쌍자표면활성제16-4-16분자재구형효속중형성특수적배렬방식.
Conformation of Gemini 16-4-16 in heavy water solutions at concentrations close to the critical micellar concentration (cmc) was studied by NMR relaxation, self-diffusion and twodimensional nuclear Overhauser enhancement spectroscopy (2D NOESY). In forming micelles,the protons of the spacer group and a part of hydrophobic protons next to the polar head group are involved in the surface layer of the micellar core. The hydrophobic protons away from the polar head group are situated internal in the micellar core. The motion of the molecules are relatively more restricted than their monomeric homologue CTAB. 2D NOESY experiments show cross peaks between the protons in or close to the spacer group. The inter-proton distances thus calculated show deviation from those of the intra-molecular ones, calculated by HYPERCHEM.Therefore, inter-molecular interaction is responsible for these strong cross peaks. The corresponding proton pairs are in near vicinity. Accordingly we postulate a special arrangement of the molecules in the spherical 16-4-16 micelles.