Multidimensional luminescent cobalt(ii)-coordination polymers as sensors with extremely high sensitivity and selectivity for detection of acetylacetone, benzaldehyde and Cr₂O₇²⁻

Abstract

Three new ternary cobalt(ii) CPs were synthesized. 1 exhibits a 3D pcu framework, 2 possesses a 2D hcb layer and 3 is a 1D chain structure. 1, 2, and 3 can be effective luminescent probes for sensing acetylacetone, benzaldehyde and Cr2O72− ions.

Chiral Coordination Polymers from a New 2-Deoxy-d-ribose Derivative Linker: Syntheses, Structures, and Fe3+ Fluorescent Probe Functions

“…The emissions can be considered as π* → π transitions of electrons. The blue shifts (13 nm for 1 , 18 nm for 3 , and 27 nm for 4 ) can be attributed to ligand-to-metal charge transfer transitions (LMCT) . The emissions of L and 1 – 4 in the range of ca.…”

Flexible luminescent non-lanthanide metal–organic frameworks as small molecules sensors

“…All the three CPs showed luminescence quenching effect in the presence of acac and benzaldehyde in water. 115…”

Stable bifunctional ZnII-based sensor toward acetylacetone and l-histidine via a fluorescence red shift and turn-on effect

“…Exposing acac to the environment could result in pollution and pose a threat to human health, such as headache, nausea and vomiting after inhalation. 17 To date, many fluorescent sensors based on CPs or MOFs for acac have been reported, 17–32 while most of them display fluorescence quenching (turn-off effect), 17–29 and limited sensors exhibit fluorescence enhancement (turn-on effect) and shift. 30–32 Compared with the turn-off effect, the turn-on effect has higher sensitivity and is easier to identify, and the fluorescence shift has a noticeable change of colour, which could obviously distinguish targeted substances from other analytes.…”