Diamond monohydride: the most stable three-dimensional hydrocarbon

Area of Science:

• Materials Science
• Solid-State Chemistry
• Computational Chemistry

Background:

• Hydrocarbons typically exist as molecular structures or linear polymers.
• The discovery of graphene and graphane has spurred interest in 3D hydrocarbon polymers.
• Previous hypothetical 3D hydrocarbon lattices were energetically unfavorable compared to graphane and benzene.

Purpose of the Study:

• To propose and investigate a novel, covalently bonded, three-dimensional (3D) hydrocarbon polymer.
• To assess the energetic stability and density of the proposed structure.
• To explore potential applications of this new material.

Main Methods:

• Utilizing ab initio calculations to determine the properties of the proposed structure.
• Comparing the cohesion energy and density against known isomers like graphane, cubane, and solid benzene.
• Analyzing the crystal structure, including space group (P3) and lattice parameters.

Main Results:

• A novel 3D covalently bonded carbon monohydride structure was proposed.
• The proposed structure exhibits a significantly higher density than graphane, cubane, and solid benzene.
• Ab initio calculations confirmed that the cohesion energy is comparable to or better than that of graphane and benzene.
• The crystal structure is related to a diamond sublattice with P3 space group symmetry.

Conclusions:

• The novel 3D carbon monohydride represents a stable and energetically favorable hydrocarbon polymer.
• Its high density and strong cohesion suggest potential for unique material properties.
• Further research into its applications is warranted based on its promising characteristics.