Supramolecular Organization and Photovoltaics of Triangle‐shaped Discotic Graphenes with Swallow‐tailed Alkyl Substituents

Abstract:In this paper, we focus on the structure of Polycyclic Aromatic Hydrocarbons (PAHs) and calculate the Omega and its related counting polynomials of nanostructures. Also, the exact expressions for the Theta, Sadhana, Pi, Hyper Zagreb and Forgotten Zagreb indices of linear [n]-Tetracene, V-Tetracenic nanotube, H-Tetracenic nanotube and Tetracenic nanotori were computed for the first time. These indices can be used in QSAR/QSPR studies.

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“…[22][23][24] Tetracene is the four-ringed member of the series of acenes. Tetracene has several advantages as a fission material.…”

Section: Nanostructures Of Polycyclic Aromatic Hydrocarbon (Pah)mentioning

confidence: 99%

Some Formulas for the Polynomials and Topological Indices of Nanostructures

Soleimani

Mohseni²,

Rezaei³

et al. 2016

Acta Chemica Iasi

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“…The synthesis of the three PAH derivatives with nonpolar side-chains (PAH-A, PAH-B, PAH-C) has been described in Refs. 41,42. The synthesis of the three PAH derivatives with alternating nonpolar and strongly polar side-chains (PAH-3, PAH-4, and PAH-5) will be described elsewhere.…”

Section: Device Preparationmentioning

confidence: 99%

“…PAH molecules easily self-assemble into long molecular stacks with a large, electron rich, semiconducting core, providing good charge carrier transport along the molecular stacking direction and a relatively insulating periphery. 41,[43][44][45] The molecular PAH columns typically form micrometer sized, and sponge-like 3D structures with a high surface-to-volume ratio. 33,39,40 Mass-sensitive sensors were prepared by drop-casting 2µL of PAH solution on goldplated Quartz Crystal Microbalance (QCM) resonators.…”

Section: Device Preparationmentioning

confidence: 99%

Sensor Arrays Based on Polycyclic Aromatic Hydrocarbons: Chemiresistors versus Quartz-Crystal Microbalance

Bachar

Liberman

Muallem

et al. 2013

ACS Appl. Mater. Interfaces

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Arrays of broadly cross-reactive sensors are key elements of smart, self-training sensing systems. Chemically sensitive resistors and quartz-crystal microbalance (QCM) sensors are attractive for sensing applications that involve the detection and classification of volatile organic compounds (VOCs) in the gas phase. Polycyclic aromatic hydrocarbon (PAH) derivatives as sensing materials can provide good sensitivity and robust selectivity towards different polar and nonpolar VOCs, while being quite tolerant to large humidity variations.Here, we present a comparative study of chemiresistor and QCM arrays based on a set of custom-designed PAH derivatives having either purely nonpolar coronas or alternating nonpolar and strongly polar side chain termination. The arrays were exposed to various concentrations of representative polar and nonpolar VOCs under extremely varying humidity conditions (5-80% RH). The sensor arrays' classification ability of VOC polarity, chemical class and compound separation was explained in terms of the sensing characteristics of the constituent sensors and their interaction with the VOCs. The results presented here contribute to the development of novel versatile and cost-effective real-world VOC sensing platforms.

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“…In the reported polymers, monomers are connected with ethylene linkages. The linkages have given the planarity, flexibility and eliminated the torsional strain between donor and acceptor on the entire conjugated system [21]. Furthermore, we examined the optical, electrochemical, surface morphology, conductivity and thermal properties of the synthesized polymer.…”

Section: Introductionmentioning

confidence: 99%

Conductive and photoactive nature of conjugated polymer based on thiophene functionalized thiazole or benzothiadiazole

Mahesh¹,

Karpagam²,

Goubard³

2018

Express Polym. Lett.

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Abstract. New poly (thiophene vinyl thiazole) (PTVT) and poly (thiophene vinyl benzothiadiazole) (PTVBT) was synthesized by Wittig condensation route. The absorption maximum of PTVT and PTVBT appeared at 376 and 410 nm in a solution state, and it was red-shifted to 417 and 510 nm in a thin film state. The optical band gaps were 1.7 and 1.5 eV calculated from thin film absorption edges of the polymer. The photoluminescence spectra of PTVT and PTVBT have an emission peak at 457 nm with bluish green and 487 nm with greenish-yellow fluorescence in THF solution. Both polymers showed a short fluorescence decay time (τ 1 ) of 2.31 and 0.73 ns respectively. Furthermore, the aggregation-caused quenching (ACQ) phenomenon observed in both polymers in decreased fluorescence intensity with different water fractions. The lower electrochemical band gaps were achieved for both polymers (1.4, and 1.3 eV) from cyclic voltammetry. Both polymers have a granular shaped morphology with good surface roughness was observed using AFM. High thermal stability was observed with 8% weight loss at 400°C for PTVT and 6% weight loss at 460°C for PTVBT. The highest electrical conductivity was observed from electrochemical impedance measurement which was 7.68·10 -6 Ω -1 ·cm -1 for PTVBT.

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Supramolecular Organization and Photovoltaics of Triangle‐shaped Discotic Graphenes with Swallow‐tailed Alkyl Substituents

Cited by 85 publications

References 35 publications

Some Formulas for the Polynomials and Topological Indices of Nanostructures

Some Formulas for the Polynomials and Topological Indices of Nanostructures

Sensor Arrays Based on Polycyclic Aromatic Hydrocarbons: Chemiresistors versus Quartz-Crystal Microbalance

Conductive and photoactive nature of conjugated polymer based on thiophene functionalized thiazole or benzothiadiazole

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