Linear free energy relations. III. Electrochemical characterization of salicylaldehyde anils

Kuder, James E.; Gibson, Harry W.; Wychick, Darlene

doi:10.1021/jo00895a013

Cited by 47 publications

(29 citation statements)

References 1 publication

(3 reference statements)

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“…The visible absorption spectra of the monomethine ( 5b ), bis‐monomethine ( 6b ), trimethine ( 8b ) and bis‐ trimethine cyanine dyes ( 9b ) in pure solvents [18–20] of different dielectronic constant via water (78.54), DMF (36.70), ethanol (24.3), chloroform (4.806), benzene (2.28) and dioxane (2.209) [21] are recorded and shown in Table 3.…”

Section: Resultsmentioning

confidence: 99%

“…The visible absorption spectra of the monomethine (5b), bis-monomethine (6b), trimethine (8b) and bistrimethine cyanine dyes (9b) in pure solvents [18][19][20] of different dielectronic constant via water (78.54), DMF (36.70), ethanol (24.3), chloroform (4.806), benzene (2.28) and dioxane (2.209) [21] are recorded and shown in Table 3. From Table 3, it is clear that the absorption spectra of the dyes in the ethanolic medium are characterised by the presence of two or three essential absorption bands.…”

Section: Solvatochromismmentioning

confidence: 99%

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Synthesis, absorption characteristics and solvatochromism of some novel heterocyclic cyanine dyes

Shindy

2007

Coloration Technology

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Novel heterocyclic monomethine, bis monomethine, trimethine and bis trimethine cyanine dyes incorporating benzo [2,3‐b; ,‐] bis furo [3,2‐d] pyrazole nuclei were synthesised. The absorption characteristics of the prepared cyanines were studied and determined through measuring their electronic visible absorption spectra in 95% ethanol. The solvatochromism of some of the synthesised dyes was investigated.

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Section: Resultsmentioning

confidence: 99%

Section: Solvatochromismmentioning

confidence: 99%

Synthesis, absorption characteristics and solvatochromism of some novel heterocyclic cyanine dyes

Shindy

2007

Coloration Technology

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“…Schiff bases composed of azomethines have been reported during the past two decades as materials for organic optoelectronic application [12]- [19]. The azomethine bond possesses similar isoelectronic characteristics to vinyl bond, giving rise to similar optoelectronic and thermal properties [20] [21] [22]. However, most of the Schiff base derivatives prepared for OLED applications focused on phosphorescent luminescent materials [23] [24] [25] [26] [27].…”

Section: Introductionmentioning

confidence: 99%

Solution Processable Material Derived from Aromatic Triazole, Azomethine and Tris: Preparation and Hole-Buffering Application in Polymer Light-Emitting Diodes

Lin¹,

Chen²

2018

MSCE

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This work presents the synthesis of a new hole-buffering material TAZS and its successful application in polymer light-emitting diodes to enhance device performance. The TAZS is composed of aromatic 1,2,4-triazolylcore linked with three trihydroxy tert-butyl terminals via azomethine linkages. The TAZS forms ashomogeneous film deposited by spin-coating process. The HOMO and LUMO levels of TAZS are −5.23 eV and −2.40 eV, respectively, as estimated from cyclic voltammogram. The current density results of hole-only and electron-only devices confirm strong hole-buffering capability of TAZS layer. Multilayer PLEDs with different thickness of TAZS (ITO/PEDOT: PSS/TAZS (x nm)/SY/ETL/LiF/Al) have been successfully fabricated, using spin-coating process to deposit hole-injecting PEDOT: PSS, TAZS, and emissive SY layers. The PLED with 16 nm TAZS reveals the optimal device performance, with maximum luminance and maximum current efficiency of 19,046 cd/m 2 and 4.08 cd/A, respectively, surpassing those without TAZS as HBL (8484 cd/m 2 , 2.13 cd/A). The hole-buffering characteristic of TAZS contributes greatly to improved charges' recombination ratio and enhanced emission efficiency.

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“…However, the effects of the example, the difference in the absorption spectra substituents of the subsystems on the geometry of and the stability of the trans and cis-stilbene the x-x * complexes have not been systematically complexes can be accounted for by merely considinvestigated so far. would be interesting to know ering the difference in their oxidation potentials how the substituents of the donor molecule align (AgIAgN03) being loV3 and 1a40 V4 respec-'Current address: Chemistry Division, National Research )Corrected value from J. E. Kuder et al (30).…”

Section: Introductionmentioning

confidence: 99%

Photochemical reactions of charge-transfer complexes. III. Molecular orbital studies of the charge-transfer complexes between 1,2-dimethoxyethylenes and 1,2-dicyanoethylenes

Wong¹,

Boyd²

1981

Can. J. Chem.

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. Can. J. Chem. 59,974 (1981). Ab initio and PCILO molecular orbital (MO) calculations for the four n-n* charge-transfer complexes formed between maleonitrile (MN) and fumaronitrile (FN), and cis (CS) and trans-l,2-dimethoxyethylene (TR) are reported. The donor and the acceptor molecules are stacked in parallel planes. Trans and cis-1,2-dihydroxyethylene are used as the model compounds for TR and CS in the determination of the optimum geometries of the complexes. Both types of MO calculations indicate that the eclipsed geometry (with the two central double bonds parallel and the centres of the double bonds centred over one another) is relatively unstable. With limited geometry searchin we find that the slipped geometry (with the two central double bonds parallel but separated at a projected distance of 2 . 2 f and the oxygen atoms above the cyanocarbon atoms) is the preferred structure. According to the ab initio calculations the relative order of the calculated heats of formation (AHe's) for these complexes is: Introductionwith those of the acceptor molecule in the complex In spite of the fact that the binding energy of a in solution. A basic understanding of the orientacharge-transfer (ct) complex in solution is of the tion effects would help US to predict the geometry order of a few kcal mol-~ (11, it has been very of the ct complex which in turn will be useful in (I) difficult to predict experimentally or theoretically the the 3-D structure the exact orientation of the donor and the acceptor biological macromolecules where ct interactions in the complex. X-ray crystallographic structures are important ( 1~1 , and (2) the selection of suitable provide the only reliable experimental information and for the study photochemfor ct complexes. H~~~~~~, caution must be taken ical isomerization of olefins through the irradiation in applying these solid phase results to the solution the ct The latter is a potentially phase since there is uncertainty about the impor-useful synthetic method for preparing stereospecific tance of crystal packing forces for the individual olefins (3). Selective irradiation of the ct complex complex (2). Orientation effects in ct complexes formed by one olefin isomer with a Proper donor (or have not been fully investigated by theoretical acceptor) would lead to enrichment of the alternamethods. Here, we define orientation effects as the tive olefin isomer. A successful example has been effects of the orientation of the substituents on the demonstrated in the irradiation of the ct complex geometry and stability of the ct complex. Several between trans-stilbene (t-ST) and f~mar-onitrile theoretical studies of the most stable geometries of (FN) where cis-stilbene (c-ST) can be obtained in ct complexes have been reported (see the refer-UP to 86% yield (3)-Of course in this particular ences in later sections). However, the effects of the example, the difference in the absorption spectra substituents of the subsystems on the geometry of and the stability of the trans and cis-stilbene

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Linear free energy relations. III. Electrochemical characterization of salicylaldehyde anils

Cited by 47 publications

References 1 publication

Synthesis, absorption characteristics and solvatochromism of some novel heterocyclic cyanine dyes

Synthesis, absorption characteristics and solvatochromism of some novel heterocyclic cyanine dyes

Solution Processable Material Derived from Aromatic Triazole, Azomethine and Tris: Preparation and Hole-Buffering Application in Polymer Light-Emitting Diodes

Photochemical reactions of charge-transfer complexes. III. Molecular orbital studies of the charge-transfer complexes between 1,2-dimethoxyethylenes and 1,2-dicyanoethylenes

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