Marko, Dunatov; Andreas, Puškarić; Luka, Pavić; Zoran, Štefanić; Lidija, Androš Dubraja (2022) Electrically responsive structural transformations triggered by vapour and temperature in a series of pleochroic bis(oxalato)chromium(III) complex salts. Journal of Materials Chemistry C Materials for optical and electronic devices, 10 . pp. 8024-8033. ISSN 2050-7526
![[img]](http://fulir.irb.hr/style/images/fileicons/application_pdf.png) |
PDF
- Accepted Version
- article
Download (1MB) |
Abstract
Stimuli-responsive structural transformations of metal-organic materials are attracting considerable attention due to their potential use in functional switchable devices. In this study, we describe the successful demonstration of a reversible structural transformation triggered by humidity, gaseous methanol, and temperature in a series of complex salts containing bis(oxalato)chromium(III) anions and bicyclic ammonium cations. Synthesis of complex salts with cationic DABCO and ABCO derivatives (DABCO = 1,4-diazabicyclo[2.2.2]octane; ABCO = 1-azabicyclo[2.2.2]octane), and bis(oxalato)chromium(III) [Cr(bpy)(C2O4)2]– and [Cr(phen)(C2O4)2]– anions (bpy = 2,2'-bipyridine, phen = 1,10-phenanthroline) was carried out using a green chemistry mechanochemical approach. The salts readily dissolve and can be prepared in the form of single-crystals that show pleochroism when viewed under polarised light, changing their colour from purplish red to orange, similar to the gemstone ruby, which also contains the Cr(III) ions. The characterization of the new complex salts was performed by X-ray diffraction analysis, thermal analysis, infrared spectroscopy and impedance spectroscopy. Interestingly, this series of compounds exhibits reversible single-crystal-to-single-crystal transformations involving dehydration/desolvation and rehydration/resolvation processes. Moreover, these structural transformations are accompanied by significant changes in current response, which makes these compounds interesting for use as sensors and thermistors.
| Item Type: | Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Uncontrolled Keywords: | chromium(III); bis(oxalato); structural transformation; impedance spectroscopy; | ||||||||
| Subjects: | NATURAL SCIENCES > Chemistry > Inorganic Chemistry | ||||||||
| Divisions: | Division of Materials Chemistry Division of Physical Chemistry |
||||||||
| Projects: |
|
||||||||
| Depositing User: | Lidija Androš Dubraja | ||||||||
| Date Deposited: | 15 Feb 2024 13:15 | ||||||||
| URI: | http://fulir.irb.hr/id/eprint/8583 | ||||||||
| DOI: | 10.1039/D2TC01103D |
Actions (login required)
 |
View Item |
Altmetric
Altmetric
