Synthesis and evaluation of fluorescent materials for colour control of peroxyoxalate chemiluminescence. II. Violet and blue emitters

1981 ◽  
Vol 34 (8) ◽  
pp. 1687 ◽  
Author(s):  
PJ Hanhela ◽  
DB Paul
Keyword(s):  
Peroxyoxalate Chemiluminescence ◽  
Fluorescent Materials ◽  
Blue Emitters ◽  
Synthetic Approaches ◽  
Fluorescent Compounds

Synthetic approaches to efficient blue fluorescent compounds suitable for use in peroxyoxalate chemiluminescence systems are described. Various bis(phenylethynyl)-naphthalenes and -phenan-threnes were obtained but these were shown to produce purple fluorescence and chemiluminescence. Ring substitution of 9,10-diphenylanthracene, however, afforded a number of satisfactory blue fluorescent emitters. The structure and derivation of several byproducts is also discussed.

Synthesis and evaluation of fluorescent materials for colour control of peroxyoxalate chemiluminescence. III. Yellow and red fluorescent emitters

1981 ◽  
Vol 34 (8) ◽  
pp. 1701 ◽  
Author(s):  
PJ Hanhela ◽  
DB Paul
Keyword(s):  
Emission Data ◽  
Peroxyoxalate Chemiluminescence ◽  
Fluorescent Materials

A number of bis(phenylethynyl)-substituted anthracenes and naphthacenes have been synthesized and their suitability as fluorescent additives for peroxyoxalate chemiluminescence evaluated. Fluorescence and chemiluminescence emission data for all compounds are presented. Both 2-chloro- and 6-chloro-5,12-bis(phenylethynyl)naphthacene provide effective scarlet chemiluminescence with the peroxyoxalate system (λmax 609 and 614 nm respectively). Although solutions of both compounds decolorize slowly in the presence of air and light, when used in concentrations of 1-5 × 10-3M they allow efficient chemiluminescence for greater than 5 h.

Highly efficient dual-core derivatives with EQEs as high as 8.38% at high brightness for OLED blue emitters

2019 ◽  
Vol 7 (46) ◽  
pp. 14709-14716 ◽  
Author(s):  
Seokwoo Kang ◽  
Hyocheol Jung ◽  
Hayoon Lee ◽  
Sunwoo Park ◽  
Joonghan Kim ◽  
...  
Keyword(s):  
High Efficiency ◽  
High Luminance ◽  
High Brightness ◽  
Highly Efficient ◽  
Fluorescent Materials ◽  
Blue Emitters ◽  
Dual Core ◽  
Very High

Three blue fluorescent materials were newly synthesized. A device doped with p-TPA-AP-TPA displayed a very high efficiency of 9.14 cd A−1 and an EQE of 8.38% at a high luminance of 5000 cd m−2.

FLUORESCENT METABOLITES IN VIRUS- OR RUST-INFECTED BEAN LEAVES

1965 ◽  
Vol 43 (2) ◽  
pp. 201-215 ◽  
Author(s):  
C. C. Gill
Keyword(s):  
Caffeic Acid ◽  
Paper Chromatography ◽  
Coumaric Acid ◽  
Virus Infections ◽  
New Materials ◽  
Lesion Formation ◽  
Fluorescent Materials ◽  
Derivatives Of ◽  
Fluorescent Compounds ◽  
Bean Leaves

The fluorescent substances in un-infected and virus- or rust-infected primary bean leaves were examined by paper chromatography 11 to 20 days after seeding.A relatively constant total of 17 fluorescent materials was recorded in normal leaves. For local, necrotic virus infections, totals of 20 additional fluorescent materials were recorded between [Formula: see text] and 7 days after inoculation for tobacco necrosis (TNV) and 15 between [Formula: see text] and 9 days for tobacco mosaic (TMV). Thirteen of the new materials in TMV infections appeared to be the same as some of those from TNV infections, but were quantitatively greater for the more extensively necrotic TNV lesions. One of the most prominent metabolites associated with the hypersensitive virus infections was occasionally present in trace amounts following mild leaf abrasion.Only eight materials additional to those in healthy leaves were detected in extracts from non-necrotic rusted tissue between 1 and 6 days after inoculation. Five of these were tentatively identified as common to both TNV and TMV infections and a sixth as common to TNV infections. No abnormal fluorescent materials were recorded from inoculated leaves bearing symptomless 3-day-old infections of bean strain of TMV and only a trace of one 8 days after inoculation. A rough correlation was apparent between the degree of necrosis and formation of new fluorescent compounds.Abnormal fluorescent materials were also detected in cowpea leaves bearing local lesion infections of TNV. Many of these were different from those of TNV-infected bean. The appearance of abnormal fluorescent compounds coincided with incipient virus lesion formation on bean and cowpea.Six fluorescent materials in healthy bean were tentatively identified as derivatives of caffeic acid, p-coumaric acid, or quercetin. Six major abnormal fluorescent metabolites in bean showed evidence of phenolic nature.

Liquid-chromatographic study of fluorescent materials in uremic fluids.

1983 ◽  
Vol 29 (6) ◽  
pp. 1082-1084 ◽  
Author(s):  
J S Swan ◽  
E Y Kragten ◽  
H Veening
Keyword(s):  
High Performance ◽  
Chronic Renal Disease ◽  
Peak Shift ◽  
Reversed Phase ◽  
Chromatographic Study ◽  
Shift Method ◽  
Uremic Serum ◽  
Fluorescent Materials ◽  
Liquid Chromatographic ◽  
Fluorescent Compounds

Abstract Using reversed-phase "high-performance" liquid chromatography with fluorescence detection, we separated and identified some naturally fluorescent compounds in uremic serum and hemodialysate from patients with chronic renal disease. Several of the naturally fluorescent compounds were identified as indole derivatives by co-chromatography with authentic standards. In one specific case, the identity was confirmed by an enzymic peak-shift method. Compounds identified included indican, kynurenic acid, tryptophan, and 5-hydroxy-indole-3-acetic acid. Comparison of normal and uremic serum showed that the fluorescent materials are present in significantly greater concentrations in samples from uremic patients.

scholarly journals Localization of fluorescent compounds in the firefly light organ.

1980 ◽  
Vol 28 (4) ◽  
pp. 323-329 ◽  
Author(s):  
K N Smalley ◽  
D E Tarwater ◽  
T L Davidson
Keyword(s):  
Ultraviolet Light ◽  
Light Emission ◽  
Phosphomolybdic Acid ◽  
Light Organ ◽  
Maximum Emission ◽  
Light Organs ◽  
Fluorescent Materials ◽  
And Function ◽  
Fluorescent Compounds ◽  
Firefly Light

Two fluorescent materials have been localized in the adult firefly light organ by fluorescence microscopy. One of these is located in photocyte granules, has a maximum emission between 510 and 540 nm, is more fluorescent in basic than acidic solution, and is unstable in ultraviolet light, phosphomolybdic acid, and potassium permanganate. It is thought to be luciferin. The fluorescence of this material is very dim in untreated fireflies but increases substantially following sustained light emission induced by synephrine or prolonged electrical stimulation. It is suggested that the luciferin of untreated animals is bound in the granules and that binding suppresses its fluorescence. The second fluorescent material is located in the dorsal layer of the light organ, particularly in the cells bordering on the photogenic layer. This material has a maximum emission between 510 and 520 nm, is relatively stable in ultraviolet light, and rapidly disappears when light organs are exposed to water. Its identity and function are unknown.

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