Back to Search
Start Over
Synthesis, structure, and photoluminesence of the chloridoaluminates [BMIm][Sn(AlCl4)3], [BMPyr][Sn(AlCl4)3], and [BMIm][Pb(AlCl4)3].
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 6/28/2021, Vol. 50 Issue 24, p8549-8557, 9p
- Publication Year :
- 2021
-
Abstract
- [BMIm][Sn(AlCl<subscript>4</subscript>)<subscript>3</subscript>] (1) ([BMIm]: 1-butyl-3-methylimidazolium), [BMPyr][Sn(AlCl<subscript>4</subscript>)<subscript>3</subscript>] (2) ([BMPyr]: 1-butyl-1-methyl-pyrrolidinium), and [BMIm][Pb(AlCl<subscript>4</subscript>)<subscript>3</subscript>] (3) are obtained by reaction of SnCl<subscript>2</subscript>/PbCl<subscript>2</subscript> in [BMIm]Cl/[BMPyr]Cl/AlCl<subscript>3</subscript>-based ionic liquids. The colourless crystals of the title compounds contain infinite <superscript>1</superscript><subscript>∞</subscript> [M(AlCl<subscript>4</subscript>)<subscript>3</subscript>]<superscript>n−</superscript> chains (M: Sn, Pb) that are separated by the voluminous [BMIm]<superscript>+</superscript>/[BMPyr]<superscript>+</superscript> cations. The central Sn<superscript>2+</superscript>/Pb<superscript>2+</superscript> is coordinated by chlorine in the form of distorted squared anti-prismatic polyhedra. Each Cl atom, in turn, is part of an [AlCl<subscript>4</subscript>]<superscript>−</superscript> tetrahedron that interlinks Sn<superscript>2+</superscript>/Pb<superscript>2+</superscript> to the chain-like building unit. In addition to the novel structural arrangement, all title compounds surprisingly show intense white-light emission. Although Sn<superscript>2+</superscript> and Pb<superscript>2+</superscript> are well-known as dopants in conventional phosphors, efficient luminescence via s–p-transitions of compounds containing Sn<superscript>2+</superscript>/Pb<superscript>2+</superscript> in molar quantities and as regular lattice constituents is rare. The emission of [BMIm][Sn(AlCl<subscript>4</subscript>)<subscript>3</subscript>] and [BMPyr][Sn(AlCl<subscript>4</subscript>)<subscript>3</subscript>] is very efficient with quantum yields of 51 and 76%, which belong to the highest values known for s–p-based luminescence of Sn<superscript>2+</superscript>. [ABSTRACT FROM AUTHOR]
- Subjects :
- LUMINESCENCE
POLYHEDRA
PHOSPHORS
CHLORINE
IONIC liquids
Subjects
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 50
- Issue :
- 24
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 151047505
- Full Text :
- https://doi.org/10.1039/d0dt03766d