A dual-functional metal phosphate for high proton conduction and selective luminescence turn-on sensing of Co²⁺ ions

Abstract

The {[Zn(H2PIPZ)](H2O)}n (compound 1) detects Co2+ ions with turn on fluorescent and proton conductivity of composite membrane 1@PVA10 is ten times higher than compound 1 at 98% RH and 353 K.

Post-synthetic functionalization of Zn-CP by Tb3+ ions: a ratiometric luminescent sensor for the ultraviolet filter benzophenone

“…(1) compared with other CPs or MOFs, metal phosphonates show better chemical and thermal stabilities; 49 (2) metal phosphonates have realized the detection of ions, organic small molecules, nitro explosives, etc., [50][51][52][53][54][55] which provides luminescence recognition potential for other molecules; (3) the absorption wavelength of mostly metal phosphonates (280-350 nm) overlaps with the ultraviolet absorption wavelength of the BP molecule (280-400 nm), which can result in luminescence quenching by a competitive absorption mechanism. In addition, the luminescence emission of mostly transition metal phosphonates is located in the ultraviolet or near ultraviolet region and generally shows a single emission, which makes it difficult to realize visual and ratiometric luminescence sensing.…”

A portable fiber optic sensor for the luminescent sensing of cobalt ions using carbon dots

“…18 Although reports of luminescent sensors for cobalt are relatively limited, several different material classes have been evaluated for cobalt detection, including metal-organic frameworks, 19–22 metal nanoparticles, 23–27 quantum dots, 28–30 organic molecules, 31–37 silicon nanomaterials, 38 polymers, 39 metal complexes, 40 and graphene/carbon quantum dots. 41–53 However, many of the sensors are not suitable for deployment in low pH environments 19,26,36,40,44,49,54–57 or aqueous systems, 22,32,40 suffer from cross-sensitivity in the sensing response when other metal ions are present, 28,39,41,43,53 and/or require a long or tedious synthetic approach. 21,35,37 Moreover, these luminescent sensors for cobalt have not been evaluated on low-cost, portable platforms that would be required for real-time process monitoring or cobalt prospecting, and often aren’t tested in conditions relevant for coal utilizaiton byproduct streams ( e.g.…”

A Dual-Function Cobalt Metal-Organic Framework for High Proton Conduction and Selective Luminescence Sensing of Histidine

“…So far, metal organic framework materials (MOFs), polyoxometalates (POMs), solid acids, perovskites and other substances have been widely used as proton conductors. 3,4 MOFs are porous inorganic and organic hybrid materials synthesized by metal ions or metal clusters and organic ligands. Due to the tunability of the structure and the diversity of functions of MOFs, they become potential proton-conducting materials.…”