Abstract

The behavior of self-assembly of C₆₀ molecules in solutions of C₆₀/hexane/xylene were studied by the methods of refractometry, ultraviolet–visible spectroscopy and dynamic light scattering (DLS). It was experimentally shown that with a slight increase in either the concentration of fullerene C₆₀ or the volume fraction of xylene in a C₆₀/hexane/xylene solution, the refractive index of the medium increases. Increasing the xylene content of the C₆₀/hexane/xylene system leads to significant changes in charge transfer between solute and solvent, which, in particular, exhibit both a positive solvatochromic effect and a hypochromic effect in a strong absorption band at ∼328.8 nm. It was established by the DLS method that with an increase in the concentration of C₆₀ in the C₆₀/hexane solution from 20 to 30 mg/dm³, the maximum radius of the synthesized nanoclusters in solutions changed from ∼6.25 nm to ∼17.2 nm, and also with an increase in the mole fraction of xylene in the C₆₀/hexane/xylene system, the cluster size gradually decreases.

摘要

采用折光法、紫外-可见光谱法和动态光散射(DLS)等方法研究了C ₆₀分子在C ₆₀ /己烷/二甲苯溶液中的自组装行为。实验表明，随着富勒烯 C _{60浓度或 C 60} /己烷/二甲苯溶液中二甲苯体积分数的轻微增加，介质的折射率增加。增加 C _{60的二甲苯含量}/己烷/二甲苯体系导致溶质和溶剂之间的电荷转移发生显着变化，特别是在~328.8 nm的强吸收带中表现出正溶剂化变色效应和减色效应。通过DLS方法确定，随着C ₆₀ /己烷溶液中C 60 浓度从20增加到30 mg/dm ₃ ^，溶液中合成的纳米团簇的最大半径从~6.25 nm变为~17.2 nm，并且随着C ₆₀ /己烷/二甲苯体系中二甲苯摩尔分数的增加，簇大小逐渐减小。