Light and colour as analytical detection tools: A journey into the periodic table using polyamines to bio-inspired systems as chemosensors

Abstract

This critical review describes some developments on the chemistry of fluorescent and colorimetric molecular probes or chemosensors, based on polyamines and associated compounds having oxygen and/or sulfur as donor atoms. The reported systems are essentially based on some selected published work in this field in the last five years, and in the work developed by the authors from 2000 onwards. Some interesting properties beyond sensing molecules, ions or/and cations by fluorescence, colorimetry as well as by MALDI-TOF MS spectrometry can arise from these systems. A short brief on different examples activated by PET (photoinduced electron transfer), ICT (internal charge transfer) and EET (electronic energy transfer) phenomena will be provided. Finally the introduction of bio-inspired compounds derived from emissive amino acid or short peptide systems and nanoparticle devices to detect metal ions will be reviewed (202 references).

Imidazo-benzo-15-crown-5 ethers bearing arylthienyl and bithienyl moieties as novel fluorescent chemosensors for Pd2+ and Cu2+

“…Similar findings had been published for compounds bearing a coordinative aromatic nitrogen atom. 17 Concerning Ni 2þ and Hg 2þ , it was observed the same quenching effect of about 50% with compound 4.…”

Novel polymer functionalization method for exposed-core optical fiber

“…Although sensor molecules provide a method for fluorescence based analyte detection [6], existing staining and/or specimen sampling based methodology is not well suited for real-time, in situ, and/or remote sensing applications. For such applications it is necessary to immobilize sensor molecules on the glass surface of the MOF exposed core, which can then be used directly within the medium as a sensor without requiring prior pre-mixing of analyte with sensor molecules.…”

Novel versatile imine—enamine chemosensor based on 6-nitro-4-oxo-4H-chromene for ion detection in solution, solid and gas-phase: synthesis, emission, computational and MALDI-TOF-MS studies

“…12,15a The present investigation aims to develop a multifunctional chemosensor furnished with reactive chromene groups for metal cation detection in solution as well as in gas phase. As a part of our ongoing research in the design and synthesis of new versatile dual chemosensors, 16 fluorescent probes in solution and active-recognition matrices in gas-phase, we report here the synthesis, characterization and studies of a new fluorescence ligand containing two emissive 6-nitro-4-oxo-4H-chromene units (3) and the corresponding enamine (4). The presence of a complex chelating unit formed by four oxygen atoms of the chromene units, two imine nitrogens and the three oxygen atoms of a flexible poly-oxa chain, 17 gives the molecule strong recognition capability towards metal ions through formation of coordination compounds.…”