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Tetrabromobenzene-based molecular alloys - a tool for tailoring the temperature of the thermosalient phase transition

Klaser, Teodoro ; Stepančić, Oskar LU ; Popović, Jasminka ; Pisk, Jana ; Pavić, Luka ; Picek, Igor ; Matković-Čalogović, Dubravka and Skoko, Željko (2025) In Journal of Materials Chemistry C 13(13). p.6539-6546
Abstract

A series of molecular alloys of 1,2,4,5-tetrabromobenzene and 1,2,4,5-tetrachlorobenzene with varying compositions were prepared in an attempt to obtain jumping crystals with adjustable temperature of thermosalient phase transition. Molecular alloys were studied with a combination of thermal and structural techniques (DSC, SCXRD, XRPD, hot-stage microscopy). Alloys with a high 1,2,4,5-tetrabromobenzene content (more than 90 wt%) exhibited thermosalient behaviour. Thermosalient alloys exhibited negative uniaxial thermal expansion and colossally large coefficients of thermal expansion (both linear and volumetric), with unit cell parameters increasing proportionally with tetrabromobenzene content. Finally, it was found that the temperature... (More)

A series of molecular alloys of 1,2,4,5-tetrabromobenzene and 1,2,4,5-tetrachlorobenzene with varying compositions were prepared in an attempt to obtain jumping crystals with adjustable temperature of thermosalient phase transition. Molecular alloys were studied with a combination of thermal and structural techniques (DSC, SCXRD, XRPD, hot-stage microscopy). Alloys with a high 1,2,4,5-tetrabromobenzene content (more than 90 wt%) exhibited thermosalient behaviour. Thermosalient alloys exhibited negative uniaxial thermal expansion and colossally large coefficients of thermal expansion (both linear and volumetric), with unit cell parameters increasing proportionally with tetrabromobenzene content. Finally, it was found that the temperature of phase transition increases linearly with the tetrabromobenzene content, from 30.13 °C to 45.33 °C, meaning that the tuning temperature of thermosalient mechanic response was successfully achieved.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Materials Chemistry C
volume
13
issue
13
pages
8 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:105001657914
ISSN
2050-7526
DOI
10.1039/d4tc04615c
language
English
LU publication?
yes
id
cd0b7668-77fa-44db-94ef-8dea4068e7f4
date added to LUP
2025-08-26 13:54:39
date last changed
2025-08-26 13:56:04
@article{cd0b7668-77fa-44db-94ef-8dea4068e7f4,
  abstract     = {{<p>A series of molecular alloys of 1,2,4,5-tetrabromobenzene and 1,2,4,5-tetrachlorobenzene with varying compositions were prepared in an attempt to obtain jumping crystals with adjustable temperature of thermosalient phase transition. Molecular alloys were studied with a combination of thermal and structural techniques (DSC, SCXRD, XRPD, hot-stage microscopy). Alloys with a high 1,2,4,5-tetrabromobenzene content (more than 90 wt%) exhibited thermosalient behaviour. Thermosalient alloys exhibited negative uniaxial thermal expansion and colossally large coefficients of thermal expansion (both linear and volumetric), with unit cell parameters increasing proportionally with tetrabromobenzene content. Finally, it was found that the temperature of phase transition increases linearly with the tetrabromobenzene content, from 30.13 °C to 45.33 °C, meaning that the tuning temperature of thermosalient mechanic response was successfully achieved.</p>}},
  author       = {{Klaser, Teodoro and Stepančić, Oskar and Popović, Jasminka and Pisk, Jana and Pavić, Luka and Picek, Igor and Matković-Čalogović, Dubravka and Skoko, Željko}},
  issn         = {{2050-7526}},
  language     = {{eng}},
  number       = {{13}},
  pages        = {{6539--6546}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Journal of Materials Chemistry C}},
  title        = {{Tetrabromobenzene-based molecular alloys - a tool for tailoring the temperature of the thermosalient phase transition}},
  url          = {{http://dx.doi.org/10.1039/d4tc04615c}},
  doi          = {{10.1039/d4tc04615c}},
  volume       = {{13}},
  year         = {{2025}},
}