4 research outputs found
Luminescent Zinc(II) Complexes of Fluorinated Benzothiazol-2-yl Substituted Phenoxide and Enolate Ligands
Zn(II) complexes of the following new, fluorine-containing,
benzothiazole-derived ligands have been synthesized and characterized
crystallographically: 2-(3,3,3-trifluoro-2-oxopropyl)benzothiazole
(<b>3</b>), 4,5,6,7-tetrafluoro-2-(3,3,3-trifluoro-2-oxopropyl)benzothiazole
(<b>4</b>), 4,5,6,7-tetrafluoro-2-(2-hydroxyphenyl)benzothiazole
(<b>12</b>), 2-(3,4,5,6-tetrafluoro-2-hydroxyphenyl)-4,5,6,7-tetrafluorobenzothiazole
(<b>13</b>), and 2-(3,4,5,6-tetrafluoro-2-hydroxyphenyl)benzothiazole
(<b>16</b>); the Cu(II) complex of ligand <b>4</b> is
also reported. These are analogs of the important photo- and electroluminescent
material [Zn(BTZ)<sub>2</sub>]<sub>2</sub>, where H-BTZ = 2-(2-hydroxyphenyl)benzothiazole.
DFT calculations indicate that HOMO and LUMO energy levels in these
materials are substantially lowered by fluorination. The fluorinated
ZnL<sub>2</sub> complexes are mononuclear (in contrast to the dinuclear,
nonfluorinated material [Zn(BTZ)<sub>2</sub>]<sub>2</sub>). They easily
sublime and show broad visible photoluminescence. A common crystallographic
feature is the existence of pairs of fluorinated ZnL<sub>2</sub> molecules
related by inversion centers, with their π systems facing one
another
Luminescent Zinc(II) Complexes of Fluorinated Benzothiazol-2-yl Substituted Phenoxide and Enolate Ligands
Zn(II) complexes of the following new, fluorine-containing,
benzothiazole-derived ligands have been synthesized and characterized
crystallographically: 2-(3,3,3-trifluoro-2-oxopropyl)benzothiazole
(<b>3</b>), 4,5,6,7-tetrafluoro-2-(3,3,3-trifluoro-2-oxopropyl)benzothiazole
(<b>4</b>), 4,5,6,7-tetrafluoro-2-(2-hydroxyphenyl)benzothiazole
(<b>12</b>), 2-(3,4,5,6-tetrafluoro-2-hydroxyphenyl)-4,5,6,7-tetrafluorobenzothiazole
(<b>13</b>), and 2-(3,4,5,6-tetrafluoro-2-hydroxyphenyl)benzothiazole
(<b>16</b>); the Cu(II) complex of ligand <b>4</b> is
also reported. These are analogs of the important photo- and electroluminescent
material [Zn(BTZ)<sub>2</sub>]<sub>2</sub>, where H-BTZ = 2-(2-hydroxyphenyl)benzothiazole.
DFT calculations indicate that HOMO and LUMO energy levels in these
materials are substantially lowered by fluorination. The fluorinated
ZnL<sub>2</sub> complexes are mononuclear (in contrast to the dinuclear,
nonfluorinated material [Zn(BTZ)<sub>2</sub>]<sub>2</sub>). They easily
sublime and show broad visible photoluminescence. A common crystallographic
feature is the existence of pairs of fluorinated ZnL<sub>2</sub> molecules
related by inversion centers, with their π systems facing one
another