Journal ArticleDOI
Conformational Studies on Xanthene, Thioxanthene and Acridan
TLDR
In this article, the dipole moments of xanthone, thioxanthone and their halogeno-derivatives were analyzed and it was shown that these molecules are not planar.Abstract:
A study of the dipole moments of xanthone, thioxanthone and their halogeno-derivatives leads to the conclusion that these molecules are not planar. In the xanthene and thioxanthene series, the dipole moments as well as the NMR spectra can be explained by a planar or a non-planar but rapidly inverting model. In the acridan series, the NMR spectra of N-acylacridans show that the molecule is non-planar and inverts. The barrier is 11.7, 13.1 and 13.1 Kcal/mole for the N-acetyl-, N-chloroacetyl- and N-iodoacetyl derivatives, respectively. Equally, it has been observed that at low temperature the rotation around the XCH2 CO bond in the halogenoacetylacridans is hindered.read more
Citations
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Journal ArticleDOI
All-organic thermally activated delayed fluorescence materials for organic light-emitting diodes
TL;DR: In this paper, the molecular design, photophysical characteristics and OLEDs composed of small-molecule, dendritic and polymeric TADF emitters are discussed.
Journal ArticleDOI
Regio- and conformational isomerization critical to design of efficient thermally-activated delayed fluorescence emitters.
Marc K. Etherington,Flavio Franchello,Jamie Gibson,Thomas Northey,José Santos,Jonathan S. Ward,Heather F. Higginbotham,Przemyslaw Data,Przemyslaw Data,Aleksandra Kurowska,Paloma L. dos Santos,David R. Graves,Andrei S. Batsanov,Fernando B. Dias,Martin R. Bryce,Thomas J. Penfold,Andrew P. Monkman +16 more
TL;DR: Two regioisomers of bis(10H-phenothiazin-10-yl)dibenzo[b,d]thiophene-S,S-dioxide, a donor–acceptor–donor thermally-activated delayed fluorescence (TADF) emitter, are studied and it is found that donors or acceptors with more than one conformer have negative repercussions for TADF in organic light-emitting diodes.
Journal ArticleDOI
Chemical and conformational control of the energy gaps involved in the thermally activated delayed fluorescence mechanism
TL;DR: In this article, a review summarises the significant developments in understanding and control of thermally-activated delayed fluorescence (TADF) molecules and the spin-vibronic coupling mechanism, from which they have designed new generations of emitters.
Journal ArticleDOI
Dopamine receptor blockade and the neuroleptics, a crystallographic study.
TL;DR: Further evidence is presented in support of the theory that the neuroleptics are able to block dopamine receptors because of a conformational complementarity between certain portions of these drugs and dopamine.
Journal ArticleDOI
Xanthenylideneadamantane 1,2-Dioxetane: Preparation, Properties and Its Potential Use as an Inherently Thermochemiluminescent Label
TL;DR: In this paper, the thermochemical properties of 1,2-dioxetane 9 (λ max = 420 nm, ocl-= 0.06%) were discussed along with the results from an X-ray diffraction study.
References
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Methylsulfinyl Carbanion (CH3-SO-CH2-). Formation and Applications to Organic Synthesis
E. J. Corey,Michael Chaykovsky +1 more
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Solvent Polarization Error and its Elimination in Calculating Dipole Moments
I. F. Halverstadt,W. D. Kumler +1 more
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Potential Energy Barrier Determinations for Some Alkyl Nitrites by Nuclear Magnetic Resonance
TL;DR: In this paper, a treatment for the general case relating the changes in the proton line width with the frequency of rotation about the O-N bond in the alkyl nitrites is developed.
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