Naslov
Multicomponent Halogen Bonded Materials: Towards Supramolecular Control over Structure and Properties

Autori
Cinčić, Dominik

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
One-day meeting on thermo- and photo-chromism

Mjesto i datum
Namur, Belgija, 2016

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
halogen bond ; multicomponent material ; supramolecular

Sažetak
Halogen bonds are non-covalent interactions that form between polarisable and electron- deficient halogen atoms (Br, I) and electron- rich Lewis bases (nucleophilic atoms such as O, N, S, etc.). They have been utilised as alternatives to hydrogen bonds in crystal engineering of organic and metal-organic materials. Throughout the last decade, the halogen bond has played an increasingly prominent role in crystal engineering and is one of the most interesting non-covalent interactions used for constructing functional supramolecular materials, for example, non- linear optical materials, photo-mechanical and phosphorescent materials, magnetic and conducting materials etc. Additionally, halogen bonding is a growing area of research covering the fields of solution chemistry, biomedicine and biomolecular chemistry, as well as fundamental chemistry. An overview of the currently available literature reveals that organic systems most commonly employed for the study of halogen bonding have largely been focused on cocrystals of perfluorohalocarbons as classic and commercially available halogen bond donors with various Lewis bases that act as halogen bond acceptors, usually containing nitrogen atoms (particularly the pyridine nitrogen atom). In addition to perfluorohalocarbons, many other alternative halogen bond donors also exist. They are based on purely organic compounds or include metal complexes. For example, N- haloimides are commercially available compounds commonly used as halogenation agents in organic synthesis. As the halogen atoms in these molecules are extremely polarised, they are strong halogen bond donors and can be used for construction of halogen bonded cocrystals via very short halogen bonds. They have not yet been fully recognised and studied as halogen bond donors, although they have the potential to be both excellent halogen bond donors, and are more environmentally friendly than the more usually employed perfluorinated compounds. In spite of the continuously expanding research on halogen bonds, the data available in the Cambridge Structural Database is still insufficient for establishing a complete insight into the halogen bond hierarchy, i. e. how these interactions may compete with each other and with hydrogen bonds, as well as the flexibility and predictability of halogen bond synthons.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA