2018
DOI: 10.1039/c8cc01614c
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Preparation of thermochromic selenidostannates in deep eutectic solvents

Abstract: Deep eutectic mixtures were deployed for the preparation of porous layered [Sn3Se7]n2n- single crystals. The perforation on the layers accentuates the negative temperature dependence of its band gap, resulting in remarkable thermochromic performance. Substitution of the hydroxo group by the methyl group provides an enhanced hydrophobicity for the organic template, leading to an anhydrous product with a remarkably improved thermal stability and thus reversible thermochromic properties.

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Cited by 31 publications
(37 citation statements)
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“…The DES provides a unique ionic environment with rich hydrogen bonding interactions that facilitate the solubilization of starting materials and the subsequent chemical reaction and crystallization. [48][49][50] This contributes to a more efficient and faster synthesis for thioantimonates within one day compared to those carried out in volatile molecular solvents (e.g., DMF, ethanol and amines). [51,52] Besides, the hydrolysis of urea during the reaction offers ammonium cations as both templating and charge-balancing agents to construct the anionic ribbon-stacking lattice of SbS-1 with appropriate channels responsible for the ion transfer and fixation.…”
Section: Synthesis Of Sbs-1 and The Activation By K +mentioning
confidence: 99%
“…The DES provides a unique ionic environment with rich hydrogen bonding interactions that facilitate the solubilization of starting materials and the subsequent chemical reaction and crystallization. [48][49][50] This contributes to a more efficient and faster synthesis for thioantimonates within one day compared to those carried out in volatile molecular solvents (e.g., DMF, ethanol and amines). [51,52] Besides, the hydrolysis of urea during the reaction offers ammonium cations as both templating and charge-balancing agents to construct the anionic ribbon-stacking lattice of SbS-1 with appropriate channels responsible for the ion transfer and fixation.…”
Section: Synthesis Of Sbs-1 and The Activation By K +mentioning
confidence: 99%
“…The Brunauer−Emmett−Teller (BET) specific surface area and pore size analysis were conducted by a nitrogen adsorption experiment at −196 °C on an Autosorb-IQ3+ChemStar. 25 A mixture of Sn (0.119 g, 1.0 mmol), Se (0.211 g, 2.67 mmol), choline chloride (1.12 g, 8.0 mmol), urea (0.96 g, 16.0 mmol), and 1.0 mL of N 2 H 4 •H 2 O (98%) (∼20.6 mmol) was sealed in a stainless steel reactor with a 20 mL Teflon liner and heated at 150 °C for 24 h. After cooling to room temperature, the platelike orange crystal product was obtained by washing with distilled water and drying in air, with a yield of ∼68% (0.26 g) based on Sn. The phase purity was confirmed by powder XRD characterization.…”
Section: ■ Experimental Sectionmentioning
confidence: 99%
“…(iii) Tin selenides have a tendency to react with oxygen to form thermodynamically stable oxides, which is beneficial for the complete elimination of Se 2– ions from the precursors. Inspired by our recent success in the synthetic chemistry of chalcogenides, we chose choline-directed single-crystal selenidostannate [(CH 3 ) 3 N­(CH 2 ) 2 OH] 2 [Sn 3 Se 7 ]·H 2 O ( Ch-Sn 3 Se 7 ) as a representative precursor for the preparation of porous SnO 2 . Upon calcination, Ch-Sn 3 Se 7 underwent volatilization of templates followed by conversion to oxide, leading to a novel P-SnO 2 series of materials with uniform interpenetrated porosity (Figure ).…”
Section: Introductionmentioning
confidence: 99%
“…Ionic liquids (ILs) are organic molten salts with melting points below 100 °C. They have several advantages over common organic solvents, such as nonvolatility, high conductivity, and a high degree of designability properties. Since both the cation and anion of ILs are adjustable, a large number of IL-based intelligent response materials (including light, pH, electrochromic, thermochromic, and magnetic) have been designed by varying their structure. For example, a new thermochromic IL (nickel-bromine IL) was created and designed to be composited with vanadium dioxide nanoparticles for improved thermochromism efficiency …”
Section: Introductionmentioning
confidence: 99%