Tuning photoluminescent properties of silver(I)-based coordination networks through their supramolecular interactions
Carregando...
Data
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Minas Gerais
Descrição
Tipo
Artigo de periódico
Título alternativo
Primeiro orientador
Membros da banca
Resumo
Eight novel luminescent silver(I)-based coordination networks have been self-assembled from two flexible dicyanomethylene ligands bearing diethylene (L1) and triethylene glycol (L2) spacers and silver salts (AgClO4 or AgBF4) in dichloromethane/toluene or dichloromethane/benzene solvents. Single-crystal X-ray diffraction reveals a variety of geometries around the silver(I) ion, resulting in mono-, bi-, and tetranuclear networks with rare topologies. The coordination networks show two-dimensional architectures through coordination of the cyano and glycolic groups to the silver(I) ions. The three-dimensional supramolecular arrangement is formed through weak π···π and Ag···π interactions as well as hydrogen bonds between water molecules and ClO4– and BF4– counterions. The silver(I)-based coordination networks display green to yellow emissions in the solid state, with quantum yields (Φem) varying from 1.1 to 8.5%. The emission properties are attributed to intraligand charge transfer and metal-perturbed intraligand transitions. Supramolecular interactions, such as Ag···π and π···π interactions, play an important role in the photophysical properties of these compounds.
Abstract
Assunto
Fotoluminescência, Prata
Palavras-chave
Photoluminescent properties, Silver
Citação
Departamento
Curso
Endereço externo
https://pubs.acs.org/doi/10.1021/acs.cgd.7b01082