Supramolecular Self-Assembly Driven Selective Sensing of Phosphates

Mondal, Sahidul; Ghosh, Tamal; Chowdhury, Bijit; Ghosh, Pradyut

doi:10.1021/acs.inorgchem.9b02483

Cited by 13 publications

(13 citation statements)

References 87 publications

(131 reference statements)

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“…They may be used for sensing when the addition of an anionic species results in a disruption of this geometry and/or induces a change in optical properties [71]. Recent examples have detected anions either via coordination and interaction directly with the metal centre [72][73][74][75], or by inducing changes in the coordination environment by binding to a ligated organic group [76][77][78][79][80].…”

Section: Metal-based Chemosensorsmentioning

confidence: 99%

Advances in fluorescent and colorimetric sensors for anionic species

McNaughton

Farès

Picci

et al. 2021

Coordination Chemistry Reviews

110

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In this review we cover recent developments in fluorescent and colorimetric anion sensors. These systems employ a range of different non-covalent interactions including hydrogen-and halogen-bonding, Lewis acidic boron-based sensors, metal-based sensors, charged systems, compounds that use anion-pi interactions to stabilise complexes, photoswitchable systems, the use of excimers and molecular logic gates in sensing. Recent developments in anion-selective chemodosimeters are also surveyed.

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Section: Metal-based Chemosensorsmentioning

confidence: 99%

Advances in fluorescent and colorimetric sensors for anionic species

McNaughton

Farès

Picci

et al. 2021

Coordination Chemistry Reviews

110

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“…In their most recent extension of the phosphate‐specific aggregation phenomena, Ghosh et al. incorporated a pyrene signaling unit, leading to a maximized quantum yield of 3 % on aggregation [24] …”

Section: Introductionmentioning

confidence: 99%

“…In their most recent extension of the phosphate-specific aggregation phenomena, Ghosh et al incorporated ap yrene signaling unit, leading to am aximized quantum yield of 3% on aggregation. [24] Although Ru II complexes are potent sensing units featuring highly beneficial charge assistance of XBs, [13b, c, 20b] their twofold cationic chargem ay induce solubility issues as well as unspecific electrostatic interactions to reach charge neutrality in organic solvent mixtures. Hence, the structurally related but monocationic congener [Ir(bpy)(ppy) 2 ] + (ppy = phenylpyridine) is an attractive alternative.…”

Section: Introductionmentioning

confidence: 99%

Facile and Reliable Emission‐Based Nanomolar Anion Sensing by Luminescent Iridium Receptors Featuring Chelating Halogen‐Bonding Sites

Kampes

Tepper

Görls

et al. 2020

Chemistry A European J

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An anion sensor is presented that combinesabidentateh ydrogen-(HB) or halogen-bonding (XB) site with a luminescent monocationic Ir fragment for strongb inding of common anions (K a up to 6 10 4 m À1)w ith diagnostice mission changes. An ew emission-based protocol for fast and reliabled etection was derived on the basis of correction for systematic but unspecificb ackground effects. Such as imple correction routine circumvents the hitherto practical limitations of systematic emission-based analysis of anion binding with validated open-source software (BindFit).T he anticipated order of K a values was obeyed according to size and ba-sicity of the anions(Cl > Br = OAc) as well as the donor atom of the receptor (XB:6 10 4 m À1 > HB:5 10 3 m À1), and led to submicromolar limitso fd etection within minutes.T he results were further validated by advanced NMR techniques, and corroborated by X-ray crystallographic dataa nd DFT analysis, which reproduced the structural and electronic features in excellent agreement. The resultss uggest that correctedemission-baseds ensingm ay become ac omplementary,r eliable, and fast tool to promote the use of XB in various application fields,d ue to the simple and fast opticald etermination at high dilution.

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“…moieties containing receptors have been reported for the selective recognition and sensing of phosphates. We have been systematically exploring the ruthenium complexes of pyridine triazole/iodotriazole and phenanthroline toward the development of a new class of metal complex based selective probes and extractants for phosphates. ,,− In this regard, initially we developed a bis-heteroleptic Ru(II) probe containing methyl-substituted pyridyl triazole for selective sensing of H 2 PO 4 – over HP 2 O 7 3– and other common inorganic anions through a solitary C–H···anion interaction . Then we introduced a bis-heteroleptic trinuclear Ru(II) probe on a cyanuric acid platform for sensing of higher homologue phosphates (pyrophosphate, ADP, and ATP) over dihydrogen phosphate .…”

Section: Introductionmentioning

confidence: 99%

“…Thus, in this class of probes, the basicity of anions might not govern the anion-sensing selectivity. Our recent investigation has demonstrated that the rigidification of probes via the formation of self-assembly might be responsible for the selective sensing of phosphates . In addition to hydrogen-bonding interactions, other weak interactions such as π–π stacking, anion−π interactions, etc.…”

Section: Introductionmentioning

confidence: 99%

Influence of Triazole Substituents of Bis-Heteroleptic Ru(II) Probes toward Selective Sensing of Dihydrogen Phosphate

Mondal

Ghosh

2021

Inorg. Chem.

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A series of seven new bis-heteroleptic Ru(II) probes (1[PF 6 ] 2 −7[PF 6 ] 2 ) along with two previously reported probes (8[PF 6 ] 2 and 9[PF 6 ] 2 ) containing a similar anion binding triazole unit (hydrogen bond donor) functionalized with various substituents are employed in a detailed comparative investigation for the development of superior selective probes for H 2 PO 4 − . Various solution-and solid-state studies, such as 1 H-DOSY NMR, dynamic light scattering (DLS), single-crystal X-ray crystallography, and transmission electron microscopy (TEM), have established that the selective sensing of H 2 PO 4− by this series of probes is primarily due to supramolecular aggregation driven enhancement of 3 MLCT emission. Intestingly, 1[PF 6 ] 2 and 7[PF 6 ] 2 , having an electron-deficient (π-acidic) aromatic pentafluorophenyl substituent are found to be superior probes for H 2 PO 4 − in comparison to the other aryl-and polyaromatic-substituted analogues (2[PF 6 ] 2 −6[PF 6 ] 2 , 8[PF 6 ] 2 , and 9[PF 6 ] 2 ), in terms of a higher enhancement of the 3 MLCT emission band, a greater binding constant, and a lower detection limit. The superiority of 1[PF 6 ] 2 and 7[PF 6 ] 2 could be due to better supramolecular aggregation properties in the cases of pentafluorophenyl analogues via both hydrogen bonding and anion−fluorine/anion−π noncovalent interactions.

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Supramolecular Self-Assembly Driven Selective Sensing of Phosphates

Cited by 13 publications

References 87 publications

Advances in fluorescent and colorimetric sensors for anionic species

Advances in fluorescent and colorimetric sensors for anionic species

Facile and Reliable Emission‐Based Nanomolar Anion Sensing by Luminescent Iridium Receptors Featuring Chelating Halogen‐Bonding Sites

Influence of Triazole Substituents of Bis-Heteroleptic Ru(II) Probes toward Selective Sensing of Dihydrogen Phosphate

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