4 research outputs found
Retail Clerks International Protective Association, Local 872 (1936)
Improved
methods for quickly identifying neutral organic compounds
and differentiation of analytes with similar chemical structures are
widely needed. We report a new approach to effectively “fingerprint”
neutral organic molecules by using <sup>19</sup>F NMR and molecular
containers. The encapsulation of analytes induces characteristic up-
or downfield shifts of <sup>19</sup>F resonances that can be used
as multidimensional parameters to fingerprint each analyte. The strategy
can be achieved either with an array of fluorinated receptors or by
incorporating multiple nonequivalent fluorine atoms in a single receptor.
Spatial proximity of the analyte to the <sup>19</sup>F is important
to induce the most pronounced NMR shifts and is crucial in the differentiation
of analytes with similar structures. This new scheme allows for the
precise and simultaneous identification of multiple analytes in a
complex mixture
Outdoor sports courses and their use at selected schools of the Benešov region
ESTs associated with VL30 elements. The Microsoft Excel file contains detailed information about the ESTs starting or terminating within distinct VL30 sequences. (XLS 84Â kb
Additional file 5: of Genomic analysis of mouse VL30 retrotransposons
VL30 elements integrated nearby mouse genes. The table provides information about all VL30 elements integrated in the vicinity of mouse genes and their relative distance to transcription start sites (TSS). (PDF 254Â kb
Thermally Activated Delayed Fluorescence and Aggregation Induced Emission with Through-Space Charge Transfer
Emissive molecules comprising a donor
and an acceptor bridged by
9,9-dimethylxanthene, were studied (XPT, XCT, and XtBuCT). The structures
position the donor and acceptor with cofacial alignment at distances
of 3.3–3.5 Å wherein efficient spatial charge transfer
can occur. The quantum yields were enhanced by excluding molecular
oxygen and thermally activated delayed fluorescence with lifetimes
on the order of microseconds was observed. Although the molecules
displayed low quantum yields in solution, higher quantum yields were
observed in the solid state. Crystal structures revealed π–π
intramolecular interactions between a donor and an acceptor, however,
the dominant intermolecular interactions were CH···π,
which likely restrict the molecular dynamics to create aggregation-induced
enhanced emission. Organic light emitting devices using XPT and XtBuCT
as dopants displayed electroluminescence external quantum efficiencies
as high as 10%