Amino and chloro derivatives of 1,10-phenanthroline as turn-off fluorescence sensors for selective and sensitive detection of Fe(II)

Solvation effect enabled visualized discrimination of multiple metal ions

“…31 Thus, a molecule with a conjugation structure and containing multiple heteroatoms is suitably applied for optical probe designing, for example, APT with two N atoms at the heterocycle is conducive to forming di- or tetra-coordination with the metal ion and its rigid planar structure is beneficial to stabilize the complexed compound for boosting energy transfer efficiency and reducing the decay of the non-radiative excited state of the metal ion. 32 Hence, APT was employed as a probe model in this work to investigate the solvation modulated optical sensing performances towards different metal ions (Fig. 1a).…”

Honeycomb-like Self-Supported Co–N–C Catalysts with an Ultrastable Structure: Highly Efficient Electrocatalysts toward Oxygen Reduction Reaction in Alkaline and Acidic Solutions

“…As reported by other literature, honeycomb being an open and unimpeded structure similar to a honeycomb shape consisted of many interconnected bubblelike units, which can reduce the migration resistance of the electrolyte in the carbon materials . Honeycomb-like morphology with a high specific surface area, good conductivity, and interconnected diffusion channels benefits electrochemical mass transfer and provides more active sites. , In fact, the structure of 1,10-phenanthroline with two nitrogen atoms as chelating properties exhibits the outstanding ability to accept π electrons and easily produce a stable coordination compound with various metal ions, which has been widely used in the field of catalyst synthesis. − Especially, the catalyst calcined at 700 °C (denoted as Co–N–C-700) exhibits desirable electrocatalytic activity and excellent durability. The E 1/2 of Co–N–C-700 shows negligible attenuation after a 10,000-cycle accelerated durability test (ADT) in both alkaline and acid electrolytes, which was rarely reported till now.…”

Rapid Synthesis of Phthalonitrile based Push‐Pull Bent Dibenzodioxin and its Utility in Selective Sensing of Ferric Ions

“…There is a possibility of good intramolecular charge transfer (ICT) from the two weakly electron donating 1,4‐benzodioxin rings to the strongly electron withdrawing ortho‐dinitrile groups. Looking at the structure of compound 6 , one realises it has a shape analogous to phenanthroline and there could be some possibility of it acting like a ligand for metal‐ions through the two oxygens labelled as A and B [7a–c] . Therefore, here we have investigated the usefulness of bent‐dibenzodioxin 6 as a fluorescent chemosensor.…”