Stable room temperature thermoelectric properties in supramolecular assembly of n‐type naphthalene‐diimide based amphiphile

Three novel lanthanide metal˗organic frameworks (Ln-MOFs), namely MOF-590, -591, and -592 were constructed from a naphthalene diimide tetracarboxylic acid. Gas adsorption measurements of MOF-591 and -592 revealed good adsorption of CO2 (low pressure, at room temperature) and moderate CO2 selectivity over N2 and CH4. Accordingly, breakthrough measurements were performed on a representative MOF-592, in which the separation of CO2 from binary mixture containing N2 and CO2 was demonstrated without any loss in performance over three consecutive cycles. Moreover, MOF-590, MOF-591, and MOF-592 exhibited catalytic activity in the one-pot synthesis of styrene carbonate from styrene and CO2 under mild conditions (1 atm CO2, 80 °C, and solvent-free). Among the new materials, MOF-590 revealed a remarkable efficiency with exceptional conversion (96%), selectivity (95%), and yield (91%).

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Core-Substituted Naphthalene-diimides (cNDI) and Related Derivatives: Versatile Scaffold for Supramolecular Assembly and Functional Materials

Organic Materials ◽

10.1055/a-1530-0476 ◽

2021 ◽

Author(s):

Anurag Mukherjee ◽

Suhrit Ghosh

Keyword(s):

Photophysical Properties ◽

Supramolecular Assembly ◽

Functional Materials ◽

Building Blocks ◽

Short Review ◽

Molecular Engineering ◽

Organic Optoelectronics ◽

Naphthalene Diimide ◽

Naphthalene Diimides ◽

Derivatives Of

Naphthalene-diimide (NDI) derived building blocks have been explored extensively for supramolecular assembly as they exhibit attractive photophysical properties, suitable for applications in organic optoelectronics. Core-substituted derivatives of the NDI chromophore (cNDI) differ significantly from the parent NDI dye in terms of optical and redox properties. Adequate molecular engineering opportunities and substitution-dependent tunable optoelectronic properties make cNDI derivatives highly promising candidates for supramolecular assembly and functional material. This short review discusses recent development in the area of functional supramolecular assemblies based on cNDIs and related molecules.

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Direct measurement of the thermoelectric properties of electrochemically deposited Bi2Te3 thin films

Scientific Reports ◽

10.1038/s41598-020-74887-z ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Jose Recatala-Gomez ◽

Pawan Kumar ◽

Ady Suwardi ◽

Anas Abutaha ◽

Iris Nandhakumar ◽

...

Keyword(s):

Thin Films ◽

Thermoelectric Properties ◽

Bismuth Telluride ◽

Indium Tin Oxide ◽

Seed Layer ◽

Room Temperature ◽

Low Cost ◽

Temperature Dependent ◽

Temperature Heat ◽

Electrochemically Deposited

Abstract The best known thermoelectric material for near room temperature heat-to-electricity conversion is bismuth telluride. Amongst the possible fabrication techniques, electrodeposition has attracted attention due to its simplicity and low cost. However, the measurement of the thermoelectric properties of electrodeposited films is challenging because of the conducting seed layer underneath the film. Here, we develop a method to directly measure the thermoelectric properties of electrodeposited bismuth telluride thin films, grown on indium tin oxide. Using this technique, the temperature dependent thermoelectric properties (Seebeck coefficient and electrical conductivity) of electrodeposited thin films have been measured down to 100 K. A parallel resistor model is employed to discern the signal of the film from the signal of the seed layer and the data are carefully analysed and contextualized with literature. Our analysis demonstrates that the thermoelectric properties of electrodeposited films can be accurately evaluated without inflicting any damage to the films.

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The Influence of Silicon Dopant and Processing on Thermoelectric Properties of B4C Ceramics

MRS Proceedings ◽

10.1557/proc-545-131 ◽

1998 ◽

Vol 545 ◽

Cited By ~ 8

Author(s):

Ke-Feng Cai ◽

Ce-Wen Nan ◽

Xin-Min Min

Keyword(s):

Electrical Conductivity ◽

Seebeck Coefficient ◽

Thermoelectric Properties ◽

Hot Pressing ◽

Figure Of Merit ◽

Room Temperature ◽

A Value ◽

Si Doped

AbstractB4C ceramics doped with various content of Si (0 to 2.03 at%) are prepared via hot pressing. The composition and microstructure of the ceramics are characterized by means of XRD and EPMA. Their electrical conductivity and Seebeck coefficient of the samples are measured from room temperature up to 1500K. The electrical conductivity increases with temperature, and more rapidly after 1300K; the Seebeck coefficient of the ceramics also increases with temperature and rises to a value of about 320μVK−1. The value of the figure of merit of Si-doped B4C rises to about 4 × 10−4K−1 at 1500K.

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Thermoelectric Properties of Bi-Sb-Te-X Compounds Prepared by MA-PDS Method

MRS Proceedings ◽

10.1557/proc-691-g8.24 ◽

2001 ◽

Vol 691 ◽

Cited By ~ 2

Author(s):

Yong-Ho Park ◽

Liu Xue-Dong

Keyword(s):

Thermoelectric Properties ◽

Figure Of Merit ◽

Room Temperature ◽

Ag Addition

ABSTRACTA great potential for further improving the room-temperature figure of merit (Z) has been identified by dispersing a small fraction of Ag in the (Bi0.25Sb0.75)2Te3 alloy. The maximum Z of 3.41×10−3K−1, 17% higher than that of the unadded, is attained at 0.02wt% Ag. Addition of BN, either alone or in combination with Ag, however, does not generate a favorable figure of merit.

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Electric and thermoelectric properties of CdTe/PbTe epitaxial nanocomposite

Functional Materials Letters ◽

10.1142/s1793604714400074 ◽

2014 ◽

Vol 07 (06) ◽

pp. 1440007

Author(s):

Michal Szot ◽

Krzysztof Dybko ◽

Piotr Dziawa ◽

Leszek Kowalczyk ◽

Viktor Domukhovski ◽

...

Keyword(s):

Thermoelectric Properties ◽

Carrier Mobility ◽

Room Temperature ◽

Molecular Beam ◽

High Quality ◽

Polycrystalline Solid ◽

Hall Effect Measurements ◽

Shubnikov De Haas Oscillations

The electric and thermoelectric properties of novel, CdTe / PbTe layered nanocomposite material are investigated. The molecular beam epitaxy (MBE) method was used for preparation of samples with well controlled distances (from 20 to 70 nm) between the layers of CdTe nanograins embedded in PbTe thermoelectric matrix as well as with number of these layers from 2 to 10. The Hall effect measurements performed in temperature range from 4–300 K revealed that carrier mobility is strongly affected by scattering on CdTe grain boundaries. The observation of Shubnikov-de Haas oscillations confirms high quality of the samples and allows determination of effective mass of conducting electrons m* = 0.04m0. The measurements of the room temperature Seebeck coefficient together with electrical conductivity lead to the power factors which are comparable to those reported in PbTe / CdTe polycrystalline solid solutions.

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Tuning the thermoelectric properties of a single-molecule junction by mechanical stretching

Physical Chemistry Chemical Physics ◽

10.1039/c4cp04635h ◽

2015 ◽

Vol 17 (7) ◽

pp. 5386-5392 ◽

Cited By ~ 7

Author(s):

Alberto Torres ◽

Renato B. Pontes ◽

Antônio J. R. da Silva ◽

Adalberto Fazzio

Keyword(s):

Seebeck Coefficient ◽

Thermoelectric Properties ◽

Single Molecule ◽

Figure Of Merit ◽

Room Temperature ◽

Heat Conductance ◽

Molecule Junction ◽

Electronic Heat ◽

Single Molecule Junction ◽

Mechanical Stretching

We theoretically investigate, as a function of the stretching, the behaviour of the Seebeck coefficient, the electronic heat conductance and the figure of merit of a molecule-based junction composed of a benzene-1,4-dithiolate (BDT) molecule coupled to Au(111) surfaces at room temperature.

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Enhancement in Room Temperature Ammonia Sensing Properties of Naphthalene Diimides through Core Expansion

Journal of Materials Chemistry C ◽

10.1039/d1tc05362k ◽

2022 ◽

Author(s):

Salman Ali ◽

Mohammed Jameel ◽

Glenn Oldham ◽

Akhil Gupta ◽

Mahnaz Shafiei ◽

...

Keyword(s):

Active Layer ◽

Organic Semiconductor ◽

Room Temperature ◽

Ammonia Gas ◽

Sensing Properties ◽

Ammonia Sensing ◽

Naphthalene Diimide ◽

Naphthalene Diimides

An amperometric type sensor whose active layer is derived from a tetra core-substituted organic semiconductor, naphthalene diimide (NDI-CN4), has been evaluated for ammonia gas (3, 6, 25 and 50 ppm)...

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Impact of the iron substitution on the thermoelectric properties of Co 1− x Fe x S 2 ( x ≤ 0.30)

Philosophical Transactions of The Royal Society A Mathematical Physical and Engineering Sciences ◽

10.1098/rsta.2018.0337 ◽

2019 ◽

Vol 377 (2152) ◽

pp. 20180337 ◽

Cited By ~ 1

Author(s):

Ulises Acevedo Salas ◽

Ismail Fourati ◽

Jean Juraszek ◽

Fabienne Richomme ◽

Denis Pelloquin ◽

...

Keyword(s):

Thermal Conductivity ◽

Thermal Properties ◽

Thermoelectric Properties ◽

Thermoelectric Material ◽

Power Factor ◽

Room Temperature ◽

Low Carbon ◽

Energy Materials ◽

Work Samples ◽

Lattice Part

The strong interplay between magnetism and transport can tune the thermoelectric properties in chalcogenides and oxides. In the case of ferromagnetic CoS 2 pyrite, it was previously shown that the power factor is large at room temperature, reaching 1 mW m −1 K −2 and abruptly increases for temperatures below the Curie transition ( T C ), an increase potentially due to a magnonic effect on the Seebeck ( S ) coefficient. The too large thermal conductivity approximately equal to 10.5 W m −1 K −1 at room temperature prevents this pyrite from being a good thermoelectric material. In this work, samples belonging to the Co 1− x Fe x S 2 pyrite family ( x = 0, 0.15 and 0.30) have thus been investigated in order to modify the thermal properties by the introduction of disorder on the Co site. We show here that the thermal conductivity can indeed be reduced by such a substitution, but that this substitution predominantly induces a reduction of the electronic part of the thermal conductivity and not of the lattice part. Interestingly, the magnonic contribution to S below T C disappears as x increases, while at high T , S tends to a very similar value (close to −42 µV K −1 ) for all the samples investigated. This article is part of a discussion meeting issue ‘Energy materials for a low carbon future’.

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