In the present work, we describe the chemical synthesis of 3-HFAs as prominent derivatives of fatty acids and assess if they could be applied as phase change materials (PCM). In addition, 3-HFAs were obtained by depolymerization of a bacterial biopolymeric material, polyhydroxyalkanoate. Thermal properties of 3hydoxyoctanoic, decanoic, and dodecanoic acids are reported for the first time.These materials showed the potential to be applied as PCM in temperature range from 33°C to 66°C. In order to expand the temperature range for application of 3-HFAs as PCM, eutectic mass ratios of three kinds of binary mixtures of 3-HFAs were calculated, and their properties were predicted using the Schröder-van Laar equation. Thermal properties of these mixtures were validated by differential scanning calorimetry (DSC) analysis. These results showed that eutectics considerably expanded the scope of applications of 3-HFAs as PCMs.3-HFAs originating from biotechnologically obtained polyhydroxyalkanoates also showed potential to be applied in development of PCMs.

In this study, β-keto esters as readily available bio-based building blocks were used to decorate the C60 sphere.

The synthesis and characterization of four dumbbell‐shaped fullerene molecules connected by isosorbide and isomannide moieties is presented. Additionally, their electrochemical behavior and their ability to form complexes with [10]cycloparaphenylene ([10]CPP) were investigated. The cyclic voltammetry (CV) results of the fullerene dumbbells demonstrate a high electron affinity, indicating their strong interaction with electron‐donating counterparts such as carbon nanorings, which possess complementary charge and shape properties. To study the thermodynamic and kinetic parameters of complexation, isothermal titration calorimetry (ITC) was employed. NMR titration experiments provided further insights into the binding stoichiometries. Two distinct approaches were utilized to create bridged structures: one based on cyclopropane and the other based on furan. Regardless of the type of linker used, all derivatives formed conventional 2 : 1 complexes denoted as [10]CPP2⊃C60derivative. However, the methano‐dumbbell molecules exhibited distinct binding behavior, resulting in the formation of mono‐ and bis‐pseudorotaxanes, as well as oligomers (polymers). The formation of linear polymers holds significant potential for applications in solar energy conversion processes.

The cover picture represents the fascinating interaction between novel sugar‐bridged fullerene dumbbells and the [10]cycloparaphenylene nanoring. It visually depicts the formation of mono‐ and bis‐pseudorotaxanes, which exhibit variations depending on the sugar moiety and anchoring strategy employed. Additionally, the artwork highlights the formation of methano‐dumbbell oligomers, emphasizing their potential application in sustainable solar energy conversion. More information can be found in the Research Article by M. E. Pérez‐Ojeda, A. Mitrović, V. Maslak and co‐workers (DOI: 10.1002/chem.202301061).