Molecular solid

About: Molecular solid is a research topic. Over the lifetime, 1173 publications have been published within this topic receiving 34297 citations. The topic is also known as: molecular lattice.

Positronium Annihilation in Molecular Substances

Abstract: The behavior of the Ps atom in molecular substances, particularly liquids, is investigated. The pickoff rates of o‐Ps in various liquid compounds are found to have a simple empirical relationship to the values of the surface tension of the liquids. The relationship is found to have a theoretical foundation. The Ps atom is highly localized in a cavity created by the balance of various molecular forces inside the liquid. From the above relationship, other simple relationships between the pickoff rates of o‐Ps and the various properties of the medium, e.g., polarizability, cohesive energy density, etc., and the temperature or pressure changes can be derived and explained. The diffusion of o‐Ps is discussed. A similar approach can also be used for molecular solids.

Small Molecule Solution-Processed Bulk Heterojunction Solar Cells†

Abstract: Although most research in the field of organic bulk heterojunction solar cells has focused on combinations of a p-type conducting polymer as a donor and a fullerene-based acceptor, recent work has demonstrated the viability of solution-processed heterojunctions composed entirely of molecular solids. Molecular solids offer potential advantages over conjugated polymer systems in terms of easier purification, amenability to mass-scale production and better batch-to-batch reproducibility. This article reviews the major classes of molecular donors that have been reported in the literature in the past several years and highlights some of key considerations in molecular heterojunction design compared to polymer-based bulk heterojunctions.

The solid molecular hydrogens in the condensed phase: Fundamentals and static properties

Abstract: The molecular hydrogens (${\mathrm{H}}_{2}$, ${\mathrm{D}}_{2}$, HD, etc.) form the simplest of all molecular solids. The combination of the light mass, small moment of inertia, weak interactions, and the quasi-metastable ortho-para species result in a fascinating low-temperature behavior that can be understood to a large extent from considerations of first principles. After discussing single molecule properties and intermolecular interactions we discuss in detail the ortho-para properties, conversion and diffusion. This is followed by a description of the crystal structures and the orientational ordering phenomena. The thermodynamic properties are reviewed. The article is concluded with a discussion of the translational ground state of the solid and the effect of the large zero-point motion on the solid state properties. A large number of data are collected in tables and graphs to provide a reference source.

Building co-crystals with molecular sense and supramolecular sensibility

Abstract: Molecular recognition is typically associated with molecules in solution, but such events are also responsible for organizing molecules in the solid state. Translating principles of molecular recognition to solid-state assembly of heteromeric molecular solids is of key importance to the development of versatile, reliable and practical supramolecular synthesis. In this article we provide an overview of some modular and transferable strategies for the synthesis of binary and ternary supermolecules and co-crystals based upon a hierarchy of intermolecular interactions, notably hydrogen bonds.