Co-crystallising per-methylated tiara[5]arene and silver trifluoroacetate results in handcuff-like metallo-bis-pseudorotaxanes on account of endo-cavity and exo-wall AgI η2-arene interactions.
[4 + 2] Diels–Alder cycloadditions between quinone-containing pillar[n]arene derivatives and linear dienes lead to distorted conformations and additional chiral centres on the macrocyclic scaffold.
In this research, we report the synthesis of Si–TmC–B/PCD composites using Si, B, and transition metal carbide particles (TmC) as binders at high pressure and high temperature (HPHT method, 5.5 GPa and 1450 °C). The microstructure, elemental distribution, phase composition, thermal stability, and mechanical properties of PCD composites were systematically investigated. The Si–B/PCD sample is thermally stable in air at 919 °C. The initial oxidation temperature of the PCD sample with ZrC particles is as high as 976 °C, and it also has a maximum flexural strength of 762.2 MPa, and the highest fracture toughness of 8.0 MPa·m1/2.
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