A multistimuli responsive heteroleptic iridium(<scp>iii</scp>) complex: role of hydrogen bonding in probing solvent, pH and bovine serum albumin (BSA)

Kachwal, Vishal; Sharma, Parva Kumar; Sarmah, Amrit; Chowdhury, Shibasish; Laskar, Inamur Rahaman

doi:10.1039/c9tc07050h

Cited by 10 publications

(9 citation statements)

References 65 publications

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“…The orientational polarization that arises from the dipole moments of different polar aprotic and polar protic solvents was calculated from the Lippert–Mataga equation. 58 Orientational polarizability versus Stokes shift values of different polar aprotic and protic solvents is plotted in Figure S5 . The solvent-dependent emission properties can be interpreted using the Lippert–Mataga plot, which displays a linear relationship between the Stokes shift and orientational polarization if the emission properties depend on the solvent dipole moment.…”

Section: Resultsmentioning

confidence: 99%

“…For more insights into emission properties with solvent polarity, we have investigated the applicability of the Lippert–Mataga relationship. The orientational polarization that arises from the dipole moments of different polar aprotic and polar protic solvents was calculated from the Lippert–Mataga equation . Orientational polarizability versus Stokes shift values of different polar aprotic and protic solvents is plotted in Figure S5.…”

Section: Resultsmentioning

confidence: 99%

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Multicolor Nitrogen-Doped Carbon Quantum Dots for Environment-Dependent Emission Tuning

et al. 2022

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Carbon quantum dots (CQDs) have potential applications in many fields such as light-emitting devices, photocatalysis, and bioimaging due to their unique photoluminescence (PL) properties and environmental benignness. Here, we report the synthesis of nitrogen-doped carbon quantum dots (NCQDs) from citric acid and m -phenylenediamine using a one-pot hydrothermal approach. The environment-dependent emission changes of NCQDs were extensively investigated in various solvents, in the solid state, and in physically assembled PMMA–PnBA–PMMA copolymer gels in 2-ethyl-hexanol. NCQDs display bright emissions in various solvents as well as in the solid state. These NCQDs exhibit multicolor PL emission across the visible region upon changing the environment (solutions and polymer matrices). NCQDs also exhibit excitation-dependent PL and solvatochromism, which have not been frequently investigated in CQDs. Most CQDs are nonemissive in the aggregated or solid state due to the aggregation-caused quenching (ACQ) effect, limiting their solid-state applications. However, NCQDs synthesized here display a strong solid-state emission centered at 568 nm attributed to the presence of surface functional groups that restrict the π–π interaction between the NCQDs and assist in overcoming the ACQ effect in the solid state. NCQD-containing gels display significant fluorescence enhancement in comparison to the NCQDs in 2-ethyl hexanol, likely because of the interaction between the polar PMMA blocks and NCQDs. The application of NCQDs-Gel as a solid/gel state fluorescent display has been presented. This research facilitates the development of large-scale, low-cost multicolor phosphor for the fabrication of optoelectronic devices, sensing, and bioimaging applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Multicolor Nitrogen-Doped Carbon Quantum Dots for Environment-Dependent Emission Tuning

et al. 2022

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“…BSA is a globular protein and has an important effect on biophysical functions, such as blood circulation and drug binding [ 78 , 79 ]. Two Ir(III) complexes, namely 31 and 32 ( Figure 14 A), were reported by Laskar et al [ 80 ]. The emission intensity of 31 raised with the increasing concentration of water ( Figure 14 B).…”

Section: Specific Response Of Ir(iii) Complexes With Aie Activitymentioning

confidence: 89%

“…( E ) Alpha helices are binding partners of the ligand in the binding pocket and hydrogen bonding interactions of 31 with the residues of the proteins. Reprinted with permission from [ 80 ], copyright 2020, Royal Society of Chemistry.…”

Section: Figures and Schemementioning

confidence: 99%

Ir(III) Complexes with AIE Characteristics for Biological Applications

et al. 2022

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Both biological process detection and disease diagnosis on the basis of luminescence technology can provide comprehensive insights into the mechanisms of life and disease pathogenesis and also accurately guide therapeutics. As a family of prominent luminescent materials, Ir(III) complexes with aggregation-induced emission (AIE) tendency have been recently explored at a tremendous pace for biological applications, by virtue of their various distinct advantages, such as great stability in biological media, excellent fluorescence properties and distinctive photosensitizing features. Significant breakthroughs of AIE-active Ir(III) complexes have been achieved in the past few years and great progress has been witnessed in the construction of novel AIE-active Ir(III) complexes and their applications in organelle-specific targeting imaging, multiphoton imaging, biomarker-responsive bioimaging, as well as theranostics. This review systematically summarizes the basic concepts, seminal studies, recent trends and perspectives in this area.

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“…[21][22][23][24][25] Recently, some metal complexes have been reported to display excellent aggregation-induced phosphorescent emission (AIPE) activity. [26][27][28] As phosphorescent luminogens, Ir(III) complexes have attracted more attention in OLEDs, organic photovoltaics, luminescence sensing, and biomedical imaging due to their intriguing photophysical properties. [29][30][31][32] Hence, AIPE-active Ir(III) complexes are attractive candidates for the enrichment of AIEgen libraries and potential applications.…”

Section: Introductionmentioning

confidence: 99%

AIPE-active cationic Ir(iii) complexes for efficient detection of 2,4,6-trinitrophenol and oxygen

Chen

et al. 2023

Dalton Trans.

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A multistimuli responsive heteroleptic iridium(iii) complex: role of hydrogen bonding in probing solvent, pH and bovine serum albumin (BSA)

Abstract: This article focuses on the vital role of hydrogen bonding to explain unusual photophysical behaviours (sensing BSA, pH probing, specific solvent effect) of an ‘Aggregation-induced Emission’ (AIE) active Ir(iii) complex.

Cited by 10 publications

References 65 publications

Multicolor Nitrogen-Doped Carbon Quantum Dots for Environment-Dependent Emission Tuning

Multicolor Nitrogen-Doped Carbon Quantum Dots for Environment-Dependent Emission Tuning

Ir(III) Complexes with AIE Characteristics for Biological Applications

AIPE-active cationic Ir(iii) complexes for efficient detection of 2,4,6-trinitrophenol and oxygen

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