选取了四种氨基磺酸型两性离子化合物：氨基磺酸（SA）、氨基甲磺酸（AMA）、牛磺酸（TAU）和3-氨基-1-丙磺酸（APA），利用傅里叶变换红外光谱（FT-IR）研究了四种物质的两性离子结构。红外光谱中NH3+伸缩振动峰和SO3−的伸缩振动峰表明四种物质以两性离子化合物的形式存在。通过差示扫描量热法（DSC）和热重分析（TGA）研究了相变温度和热稳定性。结果表明四种两性离子化合物都是熔融的同时伴随着分解，并且TAU的热稳定性最好。

Four zwitterionic compounds of sulfamic acid type: sulfamic acid (SA), aminomethanesulfonic acid (AMA), taurine (TAU), and 3-amino-1-propanesulfonic acid (APA) were selected. Fourier-transform infrared spectroscopy (FT-IR) was employed to investigate the zwitterionic structures of these compounds. The results demonstrate the presence of zwitterionic forms for all four substances, as evidenced by the presence of stretching vibrational peaks for NH3+ and SO3− in the infrared spectra. Phase transition temperatures and thermal stability were analyzed using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The results indicate that all four zwitterionic compounds undergo melting accompanied by decomposition, with taurine exhibiting the highest thermal stability.