Host-guest inclusion complexation (IC) behavior of ionic liquid (IL) 1-decyl-3-methylimidazolium tetrafluoroborate [Dmim][BF₄] within β-cyclodextrin (β-CD) and the nature of complexation as well as binding affinity were studied in aqueous solution with the help of different spectroscopic methods i.e., fluorosence, dynamic light scattering (DLS), UV–vis, FTIR, and ¹H NMR spectroscopy. The nature of complexation has been established from the results obtained for critical micelle concentration (cmc), aggregation number (N_agg), Stern-Volmer constant, particle size. Fluorosence and UV–vis studies revealed that 1:1 M stoichiometry of the ICs, while FTIR and DLS studies show the formation of H-bonding, electrostatic, hydrophobic interactions within the system and size of ICs formed. IL [Dmim][BF₄] imparts distinctive properties of the ICs along with the instantaneous presence of vesicle and micelle which is well supported by DLS results. Binding constants for β-CD and IL [Dmim][BF₄] complexes have been derived using Benesi-Hildebrand method and the thermodynamic properties have been evaluated with the help of van't Hoff equation. ¹H NMR results are significant to show the changes for chemical shift of the β-CD and [Dmim][BF₄] complexes which reveals that alkyl part of the IL is inserted into the hydrophobic cavity of β-CD. The obtained results on the ICs of [Dmim][BF₄]/β-CD in this article can find potential application in soft matter construction, sensing and drug delively.

β-环糊精（β-CD）内离子液体（IL）1-癸基-3-甲基咪唑鎓四氟硼酸盐[Dmim] [BF ₄ ]的主体-客体包合络合物（IC）行为以及络合物的性质和结合亲和力在水溶液中借助不同的光谱方法进行了研究，例如荧光光谱，动态光散射（DLS），紫外可见光谱，傅立叶变换红外光谱和¹ H NMR光谱。从临界胶束浓度（cmc），聚集数（N _agg），斯特恩·沃尔默常数，粒径。荧光和紫外可见研究表明，IC的化学计量为1：1 M，而FTIR和DLS研究表明，体系内形成了H键，静电，疏水相互作用以及形成的IC大小。IL [Dmim] [BF ₄ ]赋予了IC独特的性能，同时囊泡和胶束的瞬时存在得到了DLS结果的充分支持。β-CD和IL [Dmim] [BF ₄ ]配合物的结合常数已使用Benesi-Hildebrand方法获得，并借助van't Hoff方程评估了热力学性质。¹ H NMR结果显着表明β-CD和[Dmim] [BF ₄]复合物表明IL的烷基部分被插入到β-CD的疏水腔中。本文在[Dmim] [BF ₄ ] /β-CD的IC上获得的结果可以在软物质构建，传感和药物方面找到潜在的应用。