Quenching of fluorescence in C60 fulleropyrrolidines by chloroform

Parveen, Abdulrazack; Venkatesan, S.; Nagarajan, S.

doi:10.1016/j.saa.2015.07.069

Cited by 3 publications

(5 citation statements)

References 20 publications

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“…35,36 Additionally, lower PLQY in chloroform samples might be the direct outcome of the aprotic nature of the solvent that often acts as luminescence quencher. 37,38 To test this assumption, we add an equal amount of toluene to all the samples prepared in chloroform and vice versa. As a result, addition of chloroform to toluene-based samples results in an average 5-fold PLQY decrease from initial ∼100% to ∼20%.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…PNP prepared in toluene exhibit an order of magnitude higher PLQY (η(Tol-LYS) = 76 ± 17%, η(Tol-ARG) = 92 ± 17%) when compared to the complementary samples prepared in chloroform (η(Chl-LYS) = 5 ± 2%, η(Chl-ARG) = 7 ± 2%) (Figure E). The different optical behavior of the PNP in these solvents can be attributed to electronegative chlorine groups in CHCl 3 that also influence PNP synthesis by coordination with Pb 2+ . , Additionally, lower PLQY in chloroform samples might be the direct outcome of the aprotic nature of the solvent that often acts as luminescence quencher. , To test this assumption, we add an equal amount of toluene to all the samples prepared in chloroform and vice versa. As a result, addition of chloroform to toluene-based samples results in an average 5-fold PLQY decrease from initial ∼100% to ∼20%.…”

Section: Resultsmentioning

confidence: 99%

“…The different optical behavior of the PNP in these solvents can be attributed to electronegative chlorine groups in CHCl 3 , that also influence PNP synthesis by coordination with Pb 2+ . 35,36 Additionally, lower PLQY in chloroform samples might be the direct outcome of the aprotic nature of the solvent that often acts as luminescence quencher 37,38 . To test this assumption, we add an equal amount of toluene to all the samples prepared in chloroform and vice versa.…”

Section: Methodsmentioning

confidence: 99%

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Proteinogenic Amino Acid Assisted Preparation of Highly Luminescent Hybrid Perovskite Nanoparticles

Procházková

Demchyshyn

Yumusak

et al. 2019

ACS Appl. Nano Mater.

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Versatile approaches to nanoparticle synthesis offer unprecedented opportunities for the development of optoelectronics, photonics, as well as bio sciences. With the current advancement of hybrid organic-inorganic metal halide perovskites, the next step is to expand their field of applications via utilization of functional and modifiable ligand chemistry. Here, we present a ligand assisted reprecipitation approach for highly luminescent perovskite nanoparticle synthesis using for the first time L-lysine and L-arginine for surface passivation. These nanoparticles exhibit emission within a narrow bandwidth of the visible spectrum and photoluminescence quantum yield close to 100%. Additionally, preferential ligand orientation is achieved via amino acids α-amino group blocking which results in blueshifted emission as well as smaller and more uniform particle size. These experimental results demonstrate the effectiveness of naturally occurring proteinogenic amino acids as surface ligands and offer possibilities for versatile modification of perovskite nanoparticle properties via well-studied amino acid chemistry.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Proteinogenic Amino Acid Assisted Preparation of Highly Luminescent Hybrid Perovskite Nanoparticles

Procházková

Demchyshyn

Yumusak

et al. 2019

ACS Appl. Nano Mater.

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“…The quenching type can be differentiated by their differing dependence on temperature; the quenching constants increase with increasing temperature for dynamic quenching, whereas the reverse effect is observed in case of static quenching. 31 The fluorescence quenching mechanism can be analyzed quantitatively at different temperatures (281 and 293 K) with the Stern-Volmer equation…”

Section: Fluorescence Quenching Spectra Of Bsa With Aomentioning

confidence: 99%

A Simple and Sensitive Method for Auramine O Detection Based on the Binding Interaction with Bovin Serum Albumin

et al. 2016

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A simple, rapid and effective method for auramine O (AO) detection was proposed by fluorescence and UV-Vis absorption spectroscopy. In the BR buffer system (pH 7.0), AO had a strong quenching ability to the fluorescence of bovin serum albumin (BSA) by dynamic quenching. In terms of the thermodynamic parameters calculated as ΔH > 0 and ΔS > 0, the resulting binding of BSA and AO was mainly attributed to the hydrophobic interaction forces. The linearity of this method was in the concentration range from 0.16 to 50 μmol L -1 with a detection limit of 0.05 μmol L -1. Based on fluorescence resonance energy transfer (FRET), the distance r (1.36 nm) between donor (BSA) and acceptor (AO) was obtained. Furthermore, the effects of foreign substances and ionic strength were evaluated under the optimum reaction conditions. BSA as a selective probe could be applied to the analysis of AO in medicines with satisfactory results.

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“…Thea bsorptions of BTFP in dichloromethanel ocated at 256, 310, and 430 nm show typical features characteristic of am ono-fulleropyrrolidine derivative. [14] The absorption responses of BTFP and PCBM (as acceptors) were investigated in thin-film blends with donorm aterials. Donors and donor-acceptor blends were investigated in thin films preparedf rom chloroform solution.F or donors, we em-ployedF 8BT and F8T2.…”

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confidence: 99%

Novel 5‐(Benzo[b]thiophen‐3‐yl)pyridine‐3‐carbaldehyde (BTPA) Functionalization Framework For Modulating Fullerene Electronics

et al. 2017

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Through ac ycloaddition reaction, fullerene( C 60 )w as derivatized with an ovel organic compound 5-(benzo [b]thiophen-3-yl)pyridine-3-carbaldehyde to form the processable and stable 3-(benzo [b]thiophene-3yl)-5-fullero-1-methylpyrrolidinepyridine (BTFP) compound. BTFP exhibits close similarities to phenyl-C61-butyric-acid-methyl-ester (PCBM)i nt erms of first reduction potentialv alues (À0.62 and À0.61 Vv s. Ag/AgCl, for BTFP and PCBM, respectively)a nd lowest occupied molecular orbital (LUMO) energy level values (3.93 eV in both cases). In chloroform, BTFP exhibits ab athochromic shift in the l max of BTFP (l max, BTFP = 290 nm and l max, PCBM = 260 nm), owing to the graftedb enzo [b]thiophene-3-yl)pyridinem oiety.D espite the similarityi nL UMO (3.93 eV) energy values, BTFP and PCBM differ in their luminescence-quenching ability.T he bathochromic shift in the l max of BTFP (relative to PCMB) is likely to contribute to improved light absorption of as uitable donor for photovoltaic applications.The uniquenesso fc losed-cage, nearly spherical C 60 and related fullerenem olecules has attracted considerable attention. The icosahedrals ymmetry [1] and numerousp ossibilities of functionalizationa llow the modulation of their optoelectronic properties, [2] leading to unabated interest in these intriguing carbon allotropes. The chemistry of fullerenes is that of electron-poor olefins, with sp 2 carbon atoms constrained into apyramidalized geometry.M ultiple double bonds are available on the carbon backbone, making multiple functionalization [3] an interesting route towards new functional materials.This has led to avariety of novel compoundsw ithf inely tunable features thath ave found applicationsa sc atalysts [4] and antioxidants, [5] as well as in sensors [6] and solar cells. [2a, 7] The functionalization of fullerenes does not only modifyt heir properties, but converts them into more processable forms, as pristine C 60 is only sparselys oluble in most solvents, making it intractable. Indeed, the quest for soluble fullerenes was (and still is) one of the main driving forces in the field of covalent modification of carbon nanostructures. Phenyl-C61-butyric-acid-methyl-ester (PCBM), af ullerened erivative, is as olution-processable n-type organic semiconductor,w hich is commonly blended with ptype conjugated polymers to make photovoltaic( PV) cells. However,o wing to the dependence of PV properties on frontier orbital energy levels of donor and acceptors, the application of PCBM to all donorp olymers irrespective of their optoelectronic properties leads to untrue PV properties. For instance,r eports by Susarova et al. [8] and Kästnere tal. [9] compared the PV responses of as et of polymers with PCBM and other functionalized fullerenes and observed that PCBM gave just moderate efficiencies in combination with the polymers, whereas the best PV performances were obtained with ab lend of each polymerw ith specific fullerened erivatives possessing better-suiting molecularstructures. Herein, we describe afulleropyrrolid...

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Quenching of fluorescence in C60 fulleropyrrolidines by chloroform

Cited by 3 publications

References 20 publications

Proteinogenic Amino Acid Assisted Preparation of Highly Luminescent Hybrid Perovskite Nanoparticles

Proteinogenic Amino Acid Assisted Preparation of Highly Luminescent Hybrid Perovskite Nanoparticles

A Simple and Sensitive Method for Auramine O Detection Based on the Binding Interaction with Bovin Serum Albumin

Novel 5‐(Benzo[b]thiophen‐3‐yl)pyridine‐3‐carbaldehyde (BTPA) Functionalization Framework For Modulating Fullerene Electronics

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