Molecular Self-Assembly of Group 11 Pyrazolate Complexes as Phosphorescent Chemosensors for Detection of Benzene

Ghazalli, Nur Fatiha; Yuliati, Leny; Lintang, Hendrik Oktendy

doi:10.1088/1757-899x/299/1/012029

Cited by 5 publications

(18 citation statements)

References 34 publications

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“…The structure of a trinuclear gold(I) pyrazolate complex was elucidated using a mass spectrometer and FT-IR spectroscopy. The mass spectrum of this gold(I) complex was previously reported using LC-TOF-MS where the complex showed similar monoisotopic pattern at mass per charge (m/z) of 1326.29 Dalton originated from the trimer structure of Au3C42H51N6O6 [29,30]. Further analysis was performed using FT-IR spectroscopy as shown in Figure 3 where N-H stretching vibration at a wavenumber of 3075-3171 cm -1 for the pyrazole ligand (red line) is visible.…”

Section: Characterization Of Gold(i) Pyrazolate Complexsupporting

confidence: 65%

“…Further analysis was performed using FT-IR spectroscopy as shown in Figure 3 where N-H stretching vibration at a wavenumber of 3075-3171 cm -1 for the pyrazole ligand (red line) is visible. The disappearance of this vibration band in the pyrazolate complex (black line) is due to the formation of the bonding between Au and N atoms in the pyrazole ring [29,30]. Meanwhile, the other existing vibration bands were left unchanged in the spectrum of both the ligand and complex.…”

Section: Characterization Of Gold(i) Pyrazolate Complexmentioning

confidence: 98%

“…The sensing capability of the chemosensor was evaluated using the same spectrofluorometer for monitoring changes in emission properties. Figure 1 shows the synthetic route for the preparation of gold(I) pyrazolate complex from pyrazole ligand as previously reported [29,30]. Typically, the as-synthesized 4-(3,5-dimethoxybenzyl)-3,5-dimethyl pyrazole ligand (4.06 mmol, 1.00 g) in 50 mL of dry tetrahydrofuran (THF) was firstly mixed with 4.06 mmol (1.19 g) of chloro(dimethyl sulfide)gold(I) ([Au(SMe2)]Cl) in a Schlenk under an inert condition.…”

Section: Instrumentationmentioning

confidence: 99%

“…Generally, the complex displayed blue-shifting from its emission band centered at 609 nm to around 600 nm. Such emission shifting of phosphorescent metal complex upon vapor exposure has been extensively investigated [6,8,9,11,21,[25][26][27]29,30]. For example, phosphorescent emission of Pt complexes is originated from the excited triplet state of metalmetal (Pt-Pt) to ligand charge transfer (MMLCT) and strongly depends on metal-metal interaction.…”

Section: Optical Properties Of Gold(i) Pyrazolate Complexmentioning

confidence: 99%

“…However, there is no report so far on the utilization of gold complex alone for such chemosensor applications. Recently, we have reported that trinuclear phosphorescent gold(I) 4-(3,5dimethoxybenzyl)-3,5-dimethyl pyrazolate complex was successfully utilized for sensing benzene in 5 minutes where its emission intensity was quenched up to 81% and can be autonomously recovered without external stimuli [29]. In contrast to this performance, gold(I) 4-(3,5-dimethoxybenzyl)-3,5dimethyl pyrazolate showed a small shift away from its emission intensity to the blue region upon 5 minutes exposure to EtOH [30].…”

Section: Introductionmentioning

confidence: 99%

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Systematic Study on Sensing Capability of Gold(I) Pyrazolate Complex for Vapochromic Chemosensors of Ethanol Vapors

et al. 2020

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Modified gold complexes as dinuclear adducts with silver bridge ions, clusters with other metal ions, and bimetallic sandwiches have shown better sensing capabilities for vapochromic chemosensing of organic vapors than its unmodified structure. Herein, a simple gold(I) complex, synthesized from 4-(3,5-dimethoxybenzyl)-3,5-dimethyl pyrazole ligand, have been shown to have higher sensing capability toward ethanol (EtOH) vapors. Such sensing capability can be possibly achieved when EtOH vapors have enough time to diffuse to the main sensing sites of the sensor. Thus, 80 to 160 µL (with 20 µL increment) of EtOH vapors were exposed to the synthesized gold(I) pyrazolate complex at varied distances of 2.75, 11 and 22 cm for 15 minutes. The complex displayed its sensing capability by quenching at its emission intensity of 600 nm up to 80%, which suggests the possible interaction of the EtOH vapors with the inner sensing site originated from the Au(I)–Au(I) interaction of the complex where it is possible to breakdown the light-emitting capability. Prior to this interaction, there was only a slight blue-shifting of 9 nm away from its emission intensity by the binding of EtOH vapors to the methoxy of benzene ring hence only demonstrating weak sensing capability. These results indicated that sensing capability as shown by the quenching phenomenon at the emission intensity of gold(I) complex is dependent on diffusion time of EtOH vapors.

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Section: Characterization Of Gold(i) Pyrazolate Complexsupporting

confidence: 65%

Section: Characterization Of Gold(i) Pyrazolate Complexmentioning

confidence: 98%

Section: Instrumentationmentioning

confidence: 99%

Section: Optical Properties Of Gold(i) Pyrazolate Complexmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Systematic Study on Sensing Capability of Gold(I) Pyrazolate Complex for Vapochromic Chemosensors of Ethanol Vapors

et al. 2020

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A Computational Study of Metallacycles Formed by Pyrazolate Ligands and the Coinage Metals M = Cu(I), Ag(I) and Au(I): (pzM)n for n = 2, 3, 4, 5 and 6. Comparison with Structures Reported in the Cambridge Crystallographic Data Center (CCDC)

Elguero

Alkorta

2020

Molecules

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The structures reported in the Cambridge Structural Database (CSD) for neutral metallacycles formed by coinage metals in their valence (I) (cations) and pyrazolate anions were examined. Depending on the metal, dimers and trimers are the most common but some larger rings have also been reported, although some of the larger structures are not devoid of ambiguity. M06-2x calculations were carried out on simplified structures (without C-substituents on the pyrazolate rings) in order to facilitate a comparison with the reported X-ray structures (geometries and energies). The problems of stability of the different ring sizes were also analyzed.

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Cation-Exchange in Metal-Organic Framework as a Strategy to Obtain New Material for Ascorbic Acid Detection

et al. 2022

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Ascorbic acid (AA) is an important biomolecule, the deficiency or maladjustment of which is associated with the symptoms of many diseases (e.g., cardiovascular disease or cancer). Therefore, there is a need to develop a fluorescent probe capable of detecting AA in aqueous media. Here, we report the synthesis, structural, and spectroscopic characterization (by means of, e.g., XRD, XPS, IR and Raman spectroscopy, TG, SEM, and EDS analyses), as well as the photoluminescent properties of a metal‒organic framework (MOF) based on Cu2+ and Eu3+ ions. The ion-exchange process of the extraframework cation in anionic Cu-based MOF is proposed as an appropriate strategy to obtain a new material with a nondisturbed structure and a sensitivity to interaction with AA. Accordingly, a novel Eu[Cu3(μ3-OH)(μ3-4-carboxypyrazolato)3] compound for the selective optical detection of AA with a short detection time of 5 min is described.

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Molecular Self-Assembly of Group 11 Pyrazolate Complexes as Phosphorescent Chemosensors for Detection of Benzene

Cited by 5 publications

References 34 publications

Systematic Study on Sensing Capability of Gold(I) Pyrazolate Complex for Vapochromic Chemosensors of Ethanol Vapors

Systematic Study on Sensing Capability of Gold(I) Pyrazolate Complex for Vapochromic Chemosensors of Ethanol Vapors

A Computational Study of Metallacycles Formed by Pyrazolate Ligands and the Coinage Metals M = Cu(I), Ag(I) and Au(I): (pzM)n for n = 2, 3, 4, 5 and 6. Comparison with Structures Reported in the Cambridge Crystallographic Data Center (CCDC)

Cation-Exchange in Metal-Organic Framework as a Strategy to Obtain New Material for Ascorbic Acid Detection

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