Luminescent Sensing of Volatile Organic Compounds Using a Zn-based Coordination Polymer with Tunable Morphology

Abstract

images showed plate shape microstructures with a length of 10 µm, and a thickness in range from 14 to 21 µm, which suggested that synthetic routes affect the coordination polymer morphology. The resulting coordination polymers have low porosity with surface areas around from 1.92 to 1.25 m 2 g − 1 and pore sizes in range from 0.36 to 0.61 nm for mechanochemical and room temperature stirring routes, respectively. In a preliminary fluorescent sensing study, the coordination polymer soaked with different volatile organic compounds showed noticeable shifts of the emission band in comparison with the same materials free solvent. AbstractHere we report the mechanochemical synthesis of Zn(ADB) n coordination polymer (ADB: azobenzene 4, 4′-dicarboxilic acid) in good yield, which provides advanced over conventional route as it is simple, faster, cost-effective and reproducible. Both coordination polymers were characterized by X-ray powder diffraction (PXRD), field emission scanning electron microscopy, energy dispersive X-ray spectroscopy, and simultaneous thermal analysis. PXRD studies showed that both materials exhibited the same pattern, proving the presence of the crystalline coordination polymer core. FESEM micrograph Electronic Supplementary Material The online version of this article (

Facile one-step synthesis of TiO2/Ag/SnO2 ternary heterostructures with enhanced visible light photocatalytic activity

“…6 . It was obviously that all the TiO 2 /Ag/SnO 2 samples exhibited the typical porous characteristics, as evidenced by the significant type IIb curves in the N 2 absorption-desorption isotherm of TiO 2 /Ag/SnO 2 sample 43 . This pore should be ascribed to the space among the stacking of the grain in the TiO 2 matrix or the SnO 2 shells.…”

The mechanochemical synthesis of polymers

“…230,231 While many classical solvent-based syntheses require expensive starting materials or catalysts, 232,233 mechanochemistry obviates the need for solubilising groups and allows one to avoid low DPs due to the rapid precipitation of products. 234 The need to reduce solvent waste has inspired several studies on the general mechanochemical synthesis of porous materials 235,236 such as porous carbons, [237][238][239][240][241][242][243][244][245][246][247][248] porous coordination polymers 249,250 (e.g., metal-organic frameworks (MOFs) [251][252][253][254][255] ), and purely organic polymers. 53,102,[256][257][258][259][260] Up to now, porous polymers have been exclusively synthesised by step-growth polymerisation, while particularly using polycondensation reactions.…”

“…While many classical solvent-based syntheses require expensive starting materials or catalysts, 232,233 mechanochemistry obviates the need for solubilising groups and allows one to avoid low DPs due to the rapid precipitation of products. 234 The need to reduce solvent waste has inspired several studies on the general mechanochemical synthesis of porous materials 235,236 such as porous carbons, 237–248 porous coordination polymers 249,250 ( e.g. , metal–organic frameworks (MOFs) 251–255 ), and purely organic polymers.…”