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2,2′-Bipyridyl-1,1′-dioxide based bismuth(III) bromide hybrids: studies on crystal structure and luminescence.
- Source :
- CrystEngComm; 5/28/2021, Vol. 23 Issue 20, p3744-3752, 9p
- Publication Year :
- 2021
-
Abstract
- Three bismuth(III) bromide hybrids based on 2,2′-bipyridyl-1,1′-dioxide (bp2do) were obtained by a solvothermal method, namely Bi<subscript>2</subscript>Br<subscript>6</subscript>(bp2do)<subscript>2</subscript> (1), Bi<subscript>2</subscript>Br<subscript>6</subscript>(bp2do)<subscript>2</subscript>·0.5CH<subscript>3</subscript>CN (2), and [PP14][BiBr<subscript>4</subscript>(bp2do)] (3, PP14 = 1-butyl-1-methylpiperidinium). 1 features a centrosymmetric [Bi<subscript>2</subscript>Br<subscript>6</subscript>O<subscript>4</subscript>] dimer, in which two identical [BiBr<subscript>4</subscript>O<subscript>2</subscript>] octahedra edge-share two Br atoms; 2 contains a [Bi<subscript>2</subscript>Br<subscript>6</subscript>O<subscript>4</subscript>] dinuclear unit with a unique configuration, in which a [BiBr<subscript>4</subscript>O<subscript>2</subscript>] octahedron face-shares one Br and two O atoms with a [BiBr<subscript>3</subscript>O<subscript>4</subscript>] pentagonal-bipyramid. Moreover, the metal–ligand linking mode adopted in 2 has not been reported before. The choice of organic solvents could induce different Bi–Br–bp2do geometries with a dimer in 1 and a dinuclear unit in 2. Introduction of ionic liquid cations resulted in the ionic compound 3 featuring a mononuclear [BiBr<subscript>4</subscript>(bp2do)] unit. A more rigid environment with more hydrogen bonds leads to visible green phosphorescence with long lifetime for 3 under UV light. The three compounds possess similar phosphorescence peaks at 77 K, which originates from inorganic-to-organic charge transfer (IOCT) as confirmed by density functional theory (DFT) calculations. [ABSTRACT FROM AUTHOR]
- Subjects :
- CRYSTAL structure
BISMUTH
LUMINESCENCE
CHARGE transfer
DENSITY functional theory
Subjects
Details
- Language :
- English
- ISSN :
- 14668033
- Volume :
- 23
- Issue :
- 20
- Database :
- Complementary Index
- Journal :
- CrystEngComm
- Publication Type :
- Academic Journal
- Accession number :
- 150465008
- Full Text :
- https://doi.org/10.1039/d1ce00362c