Three-Fold C 3-Symmetric Off-On Fluorescent Chemo-Sensors for Fluoride

Vishnoi, Pratap; Sen, Saumik; Patwari, G. Naresh

doi:10.1007/s10895-016-1787-2

Cited by 7 publications

(5 citation statements)

References 74 publications

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“…This triboron complex was found to be a blue‐light emitter. Murugavel and co‐workers also used building block 181 in the synthesis of several tris‐benzaldimine and tris‐salicylaldimine Schiff‐base sensors …”

Section: Carbon−nitrogen Bond‐forming Reactionsmentioning

confidence: 99%

“…This triboron complex wasf ound to be ab lue-light emitter.M urugavel and co-workersa lso used buildingb lock 181 in the synthesis of severalt ris-benzaldimine and tris-salicylaldimine Schiffbase sensors. [79] Bednaříkovµ et al reported the synthesis of star-shaped amines and studied their interactions with cyclodextrinsa nd permethylated derivatives (Scheme 111). [80] Ap alladium-catalyzed SM cross-coupling reaction between readily accessible 1,3,5-tribromobenzene (75)a nd ester-substituted phenylboron-ic acid (348)i nP EG-400a fforded triesterd erivative 349 (88 % yield).…”

Section: Miscellaneous Reactionsmentioning

confidence: 99%

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Synthetic Approaches to Star‐Shaped Molecules with 1,3,5‐Trisubstituted Aromatic Cores

Kotha

Meshram

Panguluri

et al. 2019

Chemistry An Asian Journal

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Herein, we summarize the synthetic approaches that have been developed for the synthesis of star‐shaped molecules. Typically, to design such highly functionalized molecules, simple building blocks are first assembled through trimerization reactions, starting from commercially available starting materials. Then, these building blocks are synthetically manipulated to generate extended star‐shaped molecules. We also discuss the syntheses of star‐shaped molecules that contain 2,4,6‐trisubstituted 1,3,5‐triazine or 1,3,5‐trisubstituted benzene rings as a central core and diverse substituted styrene, phenyl, and fluorene derivatives at their periphery, which endows these molecules with extended conjugation. A variety of metal‐catalyzed reactions, such as Suzuki, Buchwald–Hartwig, Sonogashira, Heck, and Negishi cross‐coupling reactions, as well as metathesis, have been employed to functionalize a range of star‐shaped molecules. The methods described herein will be helpful for designing a wide range of intricate compounds that are highly valuable in the fields of supramolecular chemistry and materials science. Owing to space limitations, we will not cover all of the publications on this topic. Instead, we will focus on examples that were reported by our research group and other relevant recent literature. Apart from the trimerization sequence, this Minireview has been structured based on the key reactions that were used to prepare the star‐shaped molecules and other higher analogues. Finally, some examples that do not fit into this classification are discussed.

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Section: Carbon−nitrogen Bond‐forming Reactionsmentioning

confidence: 99%

Section: Miscellaneous Reactionsmentioning

confidence: 99%

Synthetic Approaches to Star‐Shaped Molecules with 1,3,5‐Trisubstituted Aromatic Cores

Kotha

Meshram

Panguluri

et al. 2019

Chemistry An Asian Journal

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“…[59][60][61][62] It has been shown that uoride binds with the -OH proton of the salicylaldimine Schiff base through hydrogen bonds. 59,[63][64][65][66][67] A sensor molecule that comprises a salicylaldimine receptor connected to a uorophore unit can effectively be used as a uorescence turn-on sensor for uoride. We have synthesized three different Schiff bases, 25-27, from a reaction of 1 with three different salicylaldehydes (Scheme 5).…”

Section: Fluoride Sensingmentioning

confidence: 99%

“…We have synthesized three different Schiff bases, 25–27, from a reaction of 1 with three different salicylaldehydes ( Scheme 5 ). 63 These Schiff bases contain three salicylaldimine groups and a 1,3,5-TPB core to serve as the anion receptor and fluorophore, respectively. Due to the rapid isomerization of –C N– linkages and intramolecular PET, these Schiff bases are very weakly fluorescent in their pristine state.…”

Section: Ion Sensingmentioning

confidence: 99%

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1,3,5-Triphenylbenzene: a versatile photoluminescent chemo-sensor platform and supramolecular building block

2018

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Triphenylbenzene Sensor for Selective Detection of Picric Acid

Nagendran

Vishnoi

2017

J Fluoresc

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A C -symmetric triphenylbenzene based photoluminescent compound, 1,3,5-tris(4'-(N-methylamino)phenyl) benzene ([NHMe]TAPB), has been synthesized by mono-N-methylation of 1,3,5-tris(4'-aminophenyl) benzene (TAPB) and structurally characterized. [NHMe]TAPB acts as a selective fluorescent sensor for picric acid (PA) with a detection limit as low as 2.25 ppm at a signal to noise ratio of 3. Other related analytes (i.e. TNT, DNT and DNB) show very little effect on the fluorescence intensity of [NHMe]TAPB. The selectivity is triggered by proton transfer from picric acid to the fluorophore and ground-state complex formation between the protonated fluorophore and picrate anion through hydrogen bonding interactions. The fluorescence lifetime measurements reveal static nature of fluorescence quenching.

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Three-Fold C 3-Symmetric Off-On Fluorescent Chemo-Sensors for Fluoride

Cited by 7 publications

References 74 publications

Synthetic Approaches to Star‐Shaped Molecules with 1,3,5‐Trisubstituted Aromatic Cores

Synthetic Approaches to Star‐Shaped Molecules with 1,3,5‐Trisubstituted Aromatic Cores

1,3,5-Triphenylbenzene: a versatile photoluminescent chemo-sensor platform and supramolecular building block

Triphenylbenzene Sensor for Selective Detection of Picric Acid

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