The Effect of Auxiliary Nitrogenated Linkers on the Design of New Cadmium‐Based Coordination Polymers as Sensors for the Detection of Explosive Materials

• Published in: Chemistry : a European journal Vol. 27; no. 16; pp. 5298 - 5306
• Main Authors: Aguirre‐Díaz, Lina M., Echeverri, Marcelo, Paredes‐Gil, Katherine, Snejko, Natalia, Gómez‐Lor, Berta, Gutiérrez‐Puebla, Enrique, Monge, M. Ángeles
• Format: Journal Article
• Language: English
• Published: Germany Wiley Subscription Services, Inc 17.03.2021
• Subjects: Aromatic compounds; Benzoic acid; Cadmium; Chemistry; Coordination polymers; electron transfer; energy transfer; explosives; Explosives detection; Fluorescence; Nitrophenol; Optical properties; Photoluminescence; Photons; Picric acid; Polymers; sensing; Sensors; Transition metals; coordination polymers; energy transfer; sensing; electron transfer; explosives
• ISSN: 0947-6539; 1521-3765
• DOI: 10.1002/chem.202005166

Three new cadmium‐based coordination polymers, denoted [Cd(hfipbb)(4,4’‐bipy)] (CdPF‐1), [Cd(hfipbb)(2,2’‐bipy)] (CdPF‐2), and [Cd(hfipbb)(1,10‐phen)] (CdPF‐3), have been hydrothermally synthesized by using the well‐known V‐shaped organic linker 4,4’‐(hexafluoroisopropylidene)bis(benzoic acid) (H2hfipbb), together with different nitrogenated auxiliary linkers. Considering the d10 configuration of the transition metal selected, the luminescent properties for these CdPF‐n materials were explored, finding that materials CdPF‐2 and CdPF‐3 act as excellent sensors in the detection of explosive nitro aromatic compounds. The photoluminescence properties of CdPF‐2 and CdPF‐3 revealed that significant and sensitive fluorescence quenching was observed toward NP (nitrophenol) for CdPF‐2 and PA (picric acid) for CdPF‐3 in MeOH suspensions. Fast explosive detection: New luminescent cadmium‐based coordination polymers are presented. The nature of the ligand has a strong influence on the light‐emitting properties of these materials. Their remarkable sensitivity and selectivity to highly explosive picric acid or nitrophenol together with their excellent recyclability render them promising candidates for the detection of explosives, where fast responses are needed.