Chemical sensing of water contaminants by a colloid of a fluorescent imine-linked covalent organic framework

Abstract

Esta es la versión de autor del artículo publicado en: This is an author produced version of a paper published in:Chemical Communications 55.10 (2019): 1382-1385 DOI: http:// dx. El acceso a la versión del editor puede requerir la suscripción del recursoAccess to the published version may require subscription

Novel Dicyano-Phenylenevinylene Fluorophores for Low-Doped Layers: A Highly Emissive Material for Red OLEDs

“…Many researchers proposed fluorescent and phosphorescent emitters for the active layers of OLEDs. Several phosphorescent transition-metal complexes, luminescent rare earth metal complexes, fluorescent organic dyes, and conjugated polymers were reported [13,14,15,16,17,18,19,20,21,22,23,24,25,26,27]. Stability, easy processability, flexibility, low operating voltages, high resolution, fast response time, wide viewing angles, color purity, luminous efficiency, and low-cost construction are the features required for emissive layers.…”

Processing of covalent organic frameworks: an ingredient for a material to succeed

“…It is remarkable the example of the stable aqueous suspenions of pyrene containing COFs prepared by ultrasonication in water (Figure 15a). 11 These colloidal nanosheets show strong fluorescence that gets quenched in the presence of certain aromatic molecules (Figure 15b). This has allowed the use of the colloid to detect the presence of several organic dyes and polynitro-aromatic derivatives, suggesting the great potential of COF colloids for sensing of water contaminants, an area in which MOFs suffer from poor stability in water and amorphous porous organic polymers (POPs) offer poor pollutant-host interactions.…”

“…5 Based on their porous nature, most of the initial applications suggested for COFs were pointed towards gas adsorption, storage and separation. [6][7][8] However, more recently, they have been explored as catalysts, 9,10 sensors, 11 in the fabrication of electronic devices 12 or for renewable energy applications. 13 Figure 1. a) Scheme of a 2D hexagonal COF formation from two building blocks with appropriate geometry and functional groups.…”

Emerging porous nanosheets: From fundamental synthesis to promising applications

“…Recently, Zamora et al successfully synthesized the 2D imine-linked pyrene-IMDEA-COF (denoted as 2D-IMDEA-COF) and then exfoliated the COF to nanosheets in water to produce water colloid ( Fig. 16(d)) [164]. COF nanosheets with imide functionalized linkers displayed attractive photophysical properties, and because the structure of IMDEA-COF-1 was retained in water, the fluorescence properties of IMDEA-COF-1 nanosheets were also maintained.…”