Photo-induced characteristic study of the smallest fullerene fragment, 1,6,7,10-tetramethylfluoranthene as an acceptor

Kanth, P. Chandra; Patel, Jessica; Chauhan, Mihirsinh; Aatif, Md.; Sharma, Abhishek; Trivedi, Maitrayee U.; Tripathi, Brijesh; Tiwari, J. P.; Gupta, Govind; Kumar, Manoj; Pandey, Manoj Kumar

doi:10.1039/c7nj01229b

Cited by 8 publications

(4 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The introduction of donor groups in the pyrazole moiety results in a decrease in the oxidation potential (Table S2, SI), and on the basis of the determined oxidation potential, the HOMO energy was estimated using the formula HOMO = –(E Ox PHa–e + 4.8ev – E OxF ) , with ferrocene (F) as an external standard (Figure S38, SI). Subsequently, the band gap was estimated with the UV/Vis spectra, and with this value, the LUMO energy was estimated using the formula LUMO = HOMO + Eg (Table S2). As expected, the results show that probes substituted with the most donor groups have lower energy HOMO and smaller band gaps than the other probes.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Novel D–π–A Dyes for Colorimetric Cyanide Sensing Based on Hemicyanine–Functionalized N‐(2‐Pyridyl)pyrazoles

Garzón

Portilla

2019

Eur J Org Chem

View full text Add to dashboard Cite

Novel integrated N‐(2‐pyridyl)pyrazole‐hemicyanine dyes (PH) were synthesized as promisor chemodosimeters for colorimetric and ratiometric CN– detection. These dyes, obtained by a three‐step sequence starting from acetophenones in up to 69 % overall yield, are donor–π–acceptor (D–π–A) systems consisting of indolium‐salts bearing a modular donor aryl group on its pyrazole ring PHa–e. The salts displayed high selectivity and sensitivity for CN– (LOD of up to 9.9 × 10–7 m), as determined by interrupting the modular D–π–A system by nucleophilic attack of the cyanide on its iminium group; the mechanism of this process was confirmed by Job′s plot experiment, spectral analysis, cyclic voltammetry studies and TD‐DFT calculations. This probe changes its color from deep yellow to colorless and can be used for in‐the‐field measurements without special equipment, since this change can be easily observed by the naked eye; indeed, yellow test strips were suitably used to detect CN– in water.

show abstract

Section: Resultsmentioning

confidence: 99%

Synthesis of Novel D–π–A Dyes for Colorimetric Cyanide Sensing Based on Hemicyanine–Functionalized N‐(2‐Pyridyl)pyrazoles

Garzón

Portilla

2019

Eur J Org Chem

View full text Add to dashboard Cite

show abstract

“…FLR was synthesized as per our previous report . P3HT (regioregular) and the chlorobenzene (CB) solvent under study were purchased from Sigma-Aldrich and Merck, respectively.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Previously, we have reported 1,6,7,10-tetramethylfluoranthene (FLR) as a nonfullerene acceptor for the first time with promising results when blended with poly-3-hexylthiophene (P3HT) and good stability. 31 Furthermore, we studied the charge dynamics for the P3HT:FLR blend to understand the charge generation, which is dependent on the solvent−material interaction in the blend. 32 However, to further understand the exciton dissociation and polaron dynamics in the P3HT:FLR blend, there is a need for the detailed analysis of the chargetransfer excitons, polarons, and their corresponding kinetics, which will provide insights into the exciton dissociation and recombination pathways.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Transient Spectroscopic Dynamics of Excitons and Polarons in the P3HT:FLR Blend

et al. 2021

Self Cite

View full text Add to dashboard Cite

Transient absorbance spectroscopy is a crucial technique used to understand the excited-state behavior of materials and investigate the photoexcitation dynamics of organic donor–acceptor blends. Here, we use the potential blend of donor polymer poly-3-hexylthiophene (P3HT) and nonfullerene acceptor 1,6,7,10-tetramethylfluoranthene (FLR) to study the charge generation and recombination by transient absorption spectroscopy. We gained new insights into the functioning of the P3HT:FLR blend considering varying excitation energies. First, we show that the rise of polarons in the P3HT:FLR blend is dependent on the excitation energy. This is consistent with the understanding that the enhanced exciton delocalization facilitates the dissociation of excitons in bulk-heterojunction solar cells. Second, the excitation energy-dependent kinetic study provides an insight into charge generation and the recombination mechanism in the P3HT:FLR blend by identifying the recombination pathway. The obtained results in this study suggest that the long-lived polaron formation in P3HT:FLR is higher than that in the fullerene system, which enables it to generate more free charge carriers by reducing nonradiative recombination.

show abstract

Organic polymeric and small molecular electron acceptors for organic solar cells

Venkateswararao

Liu

Wong

2018

Materials Science and Engineering: R: Reports

View full text Add to dashboard Cite

Photo-induced characteristic study of the smallest fullerene fragment, 1,6,7,10-tetramethylfluoranthene as an acceptor

Abstract: In this study, the use of the novel 1,6,7,10-tetramethylfluoranthene as an acceptor in the organic solar cell has been demonstrated.

Cited by 8 publications

References 71 publications

Synthesis of Novel D–π–A Dyes for Colorimetric Cyanide Sensing Based on Hemicyanine–Functionalized N‐(2‐Pyridyl)pyrazoles

Synthesis of Novel D–π–A Dyes for Colorimetric Cyanide Sensing Based on Hemicyanine–Functionalized N‐(2‐Pyridyl)pyrazoles

Transient Spectroscopic Dynamics of Excitons and Polarons in the P3HT:FLR Blend

Organic polymeric and small molecular electron acceptors for organic solar cells

Contact Info

Product

Resources

About